Documentation Added with Some updates on Code.

modules/cloudsim/src/main/java/org/cloudbus/cloudsim/network/datacenter/AggregateSwitch.java

@@ -9,99 +9,131 @@ import org.cloudbus.cloudsim.core.CloudSimTags;
 import org.cloudbus.cloudsim.core.SimEvent;
 import org.cloudbus.cloudsim.core.predicates.PredicateType;
 
-public class AggregateSwitch extends Switch{
+/**
+ * This class allows to simulate aggregate switch for Datacenter network.
+ * It interacts with other switches in order to exchange
+ * packets. Please refer to following publication for more details:
+ * 
+ * Saurabh Kumar Garg and Rajkumar Buyya, NetworkCloudSim: Modelling Parallel 
+ * Applications in Cloud Simulations, Proceedings of the 4th IEEE/ACM International 
+ * Conference on Utility and Cloud Computing (UCC 2011, IEEE CS Press, USA), 
+ * Melbourne, Australia, December 5-7, 2011. 
+ *
+ * @author		Saurabh Kumar Garg
+ * @since		CloudSim Toolkit 3.0
+ * 
+ */
 
+
+public class AggregateSwitch extends Switch {
+
+	
+	/**
+	 * Constructor for Aggregate  Switch
+	 * We have to specify switches that are connected to its downlink and uplink ports,
+	 * and corresponding bandwidths
+	 *
+	 * @param name Name of the switch 
+	 * @param level At which level switch is with respect to hosts.
+	 * @param dc  Pointer to Datacenter
+	 */
 	public AggregateSwitch(String name, int level, NetworkDatacenter dc) {
 		super(name, level, dc);
 		// TODO Auto-generated constructor stub
-		
-		downlinkswitchpktlist=new HashMap<Integer,List<HostPacket>>();
-		uplinkswitchpktlist=new HashMap<Integer,List<HostPacket>>();
-		  uplinkbandwidth=Constants.BandWidthAggRoot;
-			downlinkbandwidth=Constants.BandWidthEdgeAgg;
-			latency=Constants.SwitchingDelayAgg;
-			numport=Constants.AggSwitchPort;
-			uplinkswitches=new ArrayList<Switch>();
-			downlinkswitches=new ArrayList<Switch>();
-	}
 
-	
-	private void processpacket_down(SimEvent ev) {
-		// TODO Auto-generated method stub
-		//packet coming from up level router.
-		//has to send downward
-		//check which switch to forward to 
-		//add packet in the switch list
-		//add packet in the host list
-		//int src=ev.getSource();
-		HostPacket hspkt=(HostPacket) ev.getData();
-	    int recvVMid=hspkt.pkt.reciever;
-		CloudSim.cancelAll(getId(), new PredicateType(CloudSimTags.Network_Event_send));
-		schedule(getId(),this.latency, CloudSimTags.Network_Event_send);
-	    
-	    if(this.level==Constants.Agg_LEVEL)
-	    {
-	    	//packet is coming from root so need to be sent to edgelevel swich
-	    	//find the id for edgelevel switch
-	    	int switchid=dc.VmToSwitchid.get(recvVMid);
-	    	List<HostPacket> pktlist=this.downlinkswitchpktlist.get(switchid);
-	    	if(pktlist==null){
-	    		pktlist=new ArrayList<HostPacket>();
-	    		this.downlinkswitchpktlist.put(switchid, pktlist);
-	    	}
-	    	pktlist.add(hspkt);
-	    	return;
-	    }
-	  	
+		downlinkswitchpktlist = new HashMap<Integer, List<NetworkPacket>>();
+		uplinkswitchpktlist = new HashMap<Integer, List<NetworkPacket>>();
+		uplinkbandwidth = NetworkConstants.BandWidthAggRoot;
+		downlinkbandwidth = NetworkConstants.BandWidthEdgeAgg;
+		latency = NetworkConstants.SwitchingDelayAgg;
+		numport = NetworkConstants.AggSwitchPort;
+		uplinkswitches = new ArrayList<Switch>();
+		downlinkswitches = new ArrayList<Switch>();
 	}
+	
+	/**
+	 * Send Packet to switch connected through a downlink port
+	 *
+	 * @param ev Event/packet to process
+	 */
+	
+	@Override
+	protected void processpacket_down(SimEvent ev) {
+		// packet coming from up level router.
+		// has to send downward
+		// check which switch to forward to
+		// add packet in the switch list
+		// add packet in the host list
+		NetworkPacket hspkt = (NetworkPacket) ev.getData();
+		int recvVMid = hspkt.pkt.reciever;
+		CloudSim.cancelAll(getId(), new PredicateType(
+				CloudSimTags.Network_Event_send));
+		schedule(getId(), this.latency, CloudSimTags.Network_Event_send);
 
+		if (this.level == NetworkConstants.Agg_LEVEL) {
+			// packet is coming from root so need to be sent to edgelevel swich
+			// find the id for edgelevel switch
+			int switchid = dc.VmToSwitchid.get(recvVMid);
+			List<NetworkPacket> pktlist = this.downlinkswitchpktlist.get(switchid);
+			if (pktlist == null) {
+				pktlist = new ArrayList<NetworkPacket>();
+				this.downlinkswitchpktlist.put(switchid, pktlist);
+			}
+			pktlist.add(hspkt);
+			return;
+		}
 
-	private void processpacket_up(SimEvent ev) {
-		// TODO Auto-generated method stub
-		//packet coming from down level router.
-		//has to send up
-		//check which switch to forward to 
-		//add packet in the switch list
-		//
-		//int src=ev.getSource();
-		HostPacket hspkt=(HostPacket) ev.getData();
-	    int recvVMid=hspkt.pkt.reciever;
-	    CloudSim.cancelAll(getId(), new PredicateType(CloudSimTags.Network_Event_send));
-		schedule(getId(),this.switching_delay, CloudSimTags.Network_Event_send);
-	    
-	    if(this.level==Constants.Agg_LEVEL)
-	    {
-	    	//packet is coming from edge level router so need to be sent to either root or another edge level swich
-	    	//find the id for edgelevel switch
-	    	int switchid=dc.VmToSwitchid.get(recvVMid);
-	    	boolean flagtoswtich=false;
-	    	for(Switch sw:this.downlinkswitches)
-	    	{
-        	   if(switchid==sw.getId()) flagtoswtich=true; 
-	    	}
-	    	if(flagtoswtich)
-	    	{
-		    	List<HostPacket> pktlist=this.downlinkswitchpktlist.get(switchid);
-		    	if(pktlist==null){
-		    		pktlist=new ArrayList<HostPacket>();
-		    		this.downlinkswitchpktlist.put(switchid, pktlist);
-		    	}
-		    	pktlist.add(hspkt);
-	    	}
-	    	else//send to up
-	    	{
-	    		Switch sw=this.uplinkswitches.get(0);
-		    	List<HostPacket> pktlist=this.uplinkswitchpktlist.get(sw.getId());
-		    	if(pktlist==null){
-		    		pktlist=new ArrayList<HostPacket>();
-		    		this.uplinkswitchpktlist.put(sw.getId(), pktlist);
-		    	}
-		    	pktlist.add(hspkt);
-	    	}
-	    }
 	}
+	/**
+	 * Send Packet to switch connected through a uplink port
+	 *
+	 * @param ev Event/packet to process
+	 */
+	@Override
+	protected void processpacket_up(SimEvent ev) {
+	
+		// packet coming from down level router.
+		// has to send up
+		// check which switch to forward to
+		// add packet in the switch list
+		//
+		// int src=ev.getSource();
+		NetworkPacket hspkt = (NetworkPacket) ev.getData();
+		int recvVMid = hspkt.pkt.reciever;
+		CloudSim.cancelAll(getId(), new PredicateType(
+				CloudSimTags.Network_Event_send));
+		schedule(getId(), this.switching_delay, CloudSimTags.Network_Event_send);
 
-
-		
+		if (this.level == NetworkConstants.Agg_LEVEL) {
+			// packet is coming from edge level router so need to be sent to
+			// either root or another edge level swich
+			// find the id for edgelevel switch
+			int switchid = dc.VmToSwitchid.get(recvVMid);
+			boolean flagtoswtich = false;
+			for (Switch sw : this.downlinkswitches) {
+				if (switchid == sw.getId())
+					flagtoswtich = true;
+			}
+			if (flagtoswtich) {
+				List<NetworkPacket> pktlist = this.downlinkswitchpktlist
+						.get(switchid);
+				if (pktlist == null) {
+					pktlist = new ArrayList<NetworkPacket>();
+					this.downlinkswitchpktlist.put(switchid, pktlist);
+				}
+				pktlist.add(hspkt);
+			} else// send to up
+			{
+				Switch sw = this.uplinkswitches.get(0);
+				List<NetworkPacket> pktlist = this.uplinkswitchpktlist.get(sw
+						.getId());
+				if (pktlist == null) {
+					pktlist = new ArrayList<NetworkPacket>();
+					this.uplinkswitchpktlist.put(sw.getId(), pktlist);
+				}
+				pktlist.add(hspkt);
+			}
+		}
+	}
 
 }

modules/cloudsim/src/main/java/org/cloudbus/cloudsim/network/datacenter/AppCloudlet.java

@@ -7,59 +7,72 @@ import org.cloudbus.cloudsim.UtilizationModel;
 import org.cloudbus.cloudsim.UtilizationModelFull;
 import org.cloudbus.cloudsim.core.CloudSim;
 
+/**
+ * AppCloudlet class represents an application which user submit for execution within datacenter. 
+ * It consist of several networkClouds.
+ * 
+ * Please refer to following publication for more details:
+ * 
+ * Saurabh Kumar Garg and Rajkumar Buyya, NetworkCloudSim: Modelling Parallel
+ * Applications in Cloud Simulations, Proceedings of the 4th IEEE/ACM
+ * International Conference on Utility and Cloud Computing (UCC 2011, IEEE CS
+ * Press, USA), Melbourne, Australia, December 5-7, 2011.
+ *
+ * 
+ * @author Saurabh Kumar Garg
+ * @since CloudSim Toolkit 1.0
+ */
+
 public class AppCloudlet {
 	public static final int APP_MC = 1;
 	public static final int APP_Workflow = 3;
-	public AppCloudlet(int type, int appID, 
-			double deadline, int numbervm, int userId) {
+
+	public AppCloudlet(int type, int appID, double deadline, int numbervm,
+			int userId) {
 		super();
 		this.type = type;
 		this.appID = appID;
 		this.deadline = deadline;
 		this.numbervm = numbervm;
 		this.userId = userId;
-		clist=new ArrayList<NetworkCloudlet>();
+		clist = new ArrayList<NetworkCloudlet>();
 	}
-	public int type; //fft,fem
-    public int appID;
-    public ArrayList<NetworkCloudlet> clist;
-    public double deadline;
-    public double accuracy;
-    public int numbervm;
-    public int userId;
+
+	public int type; 
+	public int appID;
+	public ArrayList<NetworkCloudlet> clist;
+	public double deadline;
+	public double accuracy;
+	public int numbervm;
+	public int userId;
 	public double exeTime;
-    public int requestclass;
-	
-    public void createCloudletList(List<Integer> vmIdList)
-    {
-    	for(int i=0;i<numbervm;i++){
-    		long length = 4;
-    		long fileSize = 300;
-    		long outputSize = 300;
-    		long memory = 256;
-    		int pesNumber = 4;
-    		UtilizationModel utilizationModel = new UtilizationModelFull();
-    		//HPCCloudlet cl=new HPCCloudlet();
-    		NetworkCloudlet cl = new NetworkCloudlet(Constants.currentCloudletId, length, pesNumber, fileSize, outputSize, memory, utilizationModel, utilizationModel, utilizationModel);
+	public int requestclass;
+    /**
+     * An example of creating APPcloudlet
+     * @param vmIdList VMs where Cloudlet will be executed
+     */
+	public void createCloudletList(List<Integer> vmIdList) {
+		for (int i = 0; i < numbervm; i++) {
+			long length = 4;
+			long fileSize = 300;
+			long outputSize = 300;
+			long memory = 256;
+			int pesNumber = 4;
+			UtilizationModel utilizationModel = new UtilizationModelFull();
+			// HPCCloudlet cl=new HPCCloudlet();
+			NetworkCloudlet cl = new NetworkCloudlet(
+					NetworkConstants.currentCloudletId, length, pesNumber, fileSize,
+					outputSize, memory, utilizationModel, utilizationModel,
+					utilizationModel);
 			// setting the owner of these Cloudlets
-    		Constants.currentCloudletId++;
-    		cl.setUserId(userId);
-			cl.submittime=CloudSim.clock();
-//    		TaskStage ts=new TaskStage(Constants.EXECUTION, 0, length, 0,memory, (i+1)%numbervm);
-//    		TaskStage ts1=new TaskStage(Constants.WAIT_SEND, 100, 0, 0, memory, (i+1)%numbervm);
-//    		TaskStage ts2=new TaskStage(Constants.WAIT_RECV, 100, 0, 0, memory, (i+1)%numbervm);
-//    		TaskStage ts3=new TaskStage(Constants.EXECUTION, 0, length, 0, memory, (i+1)%numbervm);
-//			cl.stages.add(ts);
-//    		cl.stages.add(ts1);
-//    		cl.stages.add(ts2);
-//    		cl.stages.add(ts3);
-//    		cl.submittime=CloudSim.clock();
-    		cl.currStagenum=-1;
-    		clist.add(cl);
-    		
-    		
-    	}
-    	//based on type
-    	
-    }
+			NetworkConstants.currentCloudletId++;
+			cl.setUserId(userId);
+			cl.submittime = CloudSim.clock();
+			cl.currStagenum = -1;
+			clist.add(cl);
+
+		}
+		// based on type
+
+	}
 }

modules/cloudsim/src/main/java/org/cloudbus/cloudsim/network/datacenter/MonteCarloApp.java → modules/cloudsim/src/main/java/org/cloudbus/cloudsim/network/datacenter/BagofTaskApp.java

 package org.cloudbus.cloudsim.network.datacenter;
 
+/**
+ * BagofTaskApp is an example of AppCloudlet having three noncommunicating tasks. 
+ * 
+ * 
+ * Please refer to following publication for more details:
+ * 
+ * Saurabh Kumar Garg and Rajkumar Buyya, NetworkCloudSim: Modelling Parallel
+ * Applications in Cloud Simulations, Proceedings of the 4th IEEE/ACM
+ * International Conference on Utility and Cloud Computing (UCC 2011, IEEE CS
+ * Press, USA), Melbourne, Australia, December 5-7, 2011.
+ *
+ * 
+ * @author Saurabh Kumar Garg
+ * @since CloudSim Toolkit 1.0
+ */
+
 import java.util.List;
 
 import org.cloudbus.cloudsim.UtilizationModel;
 import org.cloudbus.cloudsim.UtilizationModelFull;
 import org.cloudbus.cloudsim.core.CloudSim;
 
-public class MonteCarloApp extends AppCloudlet {
+public class BagofTaskApp extends AppCloudlet {
 
-	public MonteCarloApp(int type, int appID, double deadline, 	int numbervm, int userId) {
+	public BagofTaskApp(int type, int appID, double deadline, 	int numbervm, int userId) {
 		super(type, appID, deadline, numbervm,userId);
 		
 		this.numbervm=this.getnumvm();
@@ -19,34 +35,39 @@ public class MonteCarloApp extends AppCloudlet {
     public void createCloudletList(List<Integer> vmIdList){
 		//basically, each task runs the simulation and then data is consolidated in one task
 		int executionTime = getExecTime();
-		long memory = accuracyToMemory();
-		long fileSize = Constants.FILE_SIZE;
-		long outputSize = Constants.OUTPUT_SIZE;
-		int pesNumber = Constants.PES_NUMBER;
+		long memory = 1000;
+		long fileSize = NetworkConstants.FILE_SIZE;
+		long outputSize = NetworkConstants.OUTPUT_SIZE;
+		int pesNumber = NetworkConstants.PES_NUMBER;
 		int stgId=0;
-		int t=Constants.currentCloudletId;
+		int t=NetworkConstants.currentCloudletId;
 	  	for(int i=0;i<numbervm;i++){
     		UtilizationModel utilizationModel = new UtilizationModelFull();
-    		NetworkCloudlet cl = new NetworkCloudlet(Constants.currentCloudletId, executionTime/numbervm, pesNumber, fileSize, outputSize, memory, utilizationModel, utilizationModel, utilizationModel);
-    		Constants.currentCloudletId++;
+    		NetworkCloudlet cl = new NetworkCloudlet(NetworkConstants.currentCloudletId, executionTime/numbervm, pesNumber, fileSize, outputSize, memory, utilizationModel, utilizationModel, utilizationModel);
+    		NetworkConstants.currentCloudletId++;
     		cl.setUserId(userId);
 			cl.submittime=CloudSim.clock();
     		cl.currStagenum=-1;
 			cl.setVmId(vmIdList.get(i));
 			//compute and send data to node 0
-    		cl.stages.add(new TaskStage(Constants.EXECUTION, Constants.COMMUNICATION_LENGTH, executionTime/numbervm, stgId++, memory, vmIdList.get(0),cl.getCloudletId()));
+    		cl.stages.add(new TaskStage(NetworkConstants.EXECUTION, NetworkConstants.COMMUNICATION_LENGTH, executionTime/numbervm, stgId++, memory, vmIdList.get(0),cl.getCloudletId()));
     		
     		//0 has an extra stage of waiting for results; others send
     		if (i==0){
     			for(int j=1;j<numbervm;j++)
-    				cl.stages.add(new TaskStage(Constants.WAIT_RECV, Constants.COMMUNICATION_LENGTH, 0, stgId++, memory, vmIdList.get(j),cl.getCloudletId()+j));
+    				cl.stages.add(new TaskStage(NetworkConstants.WAIT_RECV, NetworkConstants.COMMUNICATION_LENGTH, 0, stgId++, memory, vmIdList.get(j),cl.getCloudletId()+j));
     		} else {
-    			cl.stages.add(new TaskStage(Constants.WAIT_SEND, Constants.COMMUNICATION_LENGTH, 0, stgId++, memory, vmIdList.get(0),t));
+    			cl.stages.add(new TaskStage(NetworkConstants.WAIT_SEND, NetworkConstants.COMMUNICATION_LENGTH, 0, stgId++, memory, vmIdList.get(0),t));
     		}
     		
     		clist.add(cl);    			
     	}	
 	}
+	
+	/**
+	 * One can generate number of VMs for each application based on deadline
+	 * @return
+	 */
 	public int getnumvm(){
 		double exetime=getExecTime()/2;//for two vms
 		if(this.deadline>exetime)
@@ -57,14 +78,10 @@ public class MonteCarloApp extends AppCloudlet {
 	}
 	
 	private int getExecTime() {
-		//use exec constraints as Binomial
+		//use exec constraints 
 		
 		return 100;
 	}
 
-	private long accuracyToMemory() {
-		//use same memory constraints as Binomial
-		
-		return 240076;
-	}
+	
 }

modules/cloudsim/src/main/java/org/cloudbus/cloudsim/network/datacenter/CloudletHPCSpaceShared.java

-package org.cloudbus.cloudsim.network.datacenter;
-	import java.util.ArrayList;
-import java.util.Collection;
-import java.util.Collections;
-import java.util.Comparator;
-import java.util.HashMap;
-import java.util.Iterator;
-	import java.util.List;
-import java.util.Map;
-
-import org.cloudbus.cloudsim.Cloudlet;
-import org.cloudbus.cloudsim.CloudletScheduler;
-import org.cloudbus.cloudsim.ResCloudlet;
-import org.cloudbus.cloudsim.core.CloudSim;
-import org.cloudbus.cloudsim.core.CloudSimTags;
-
-	public class CloudletHPCSpaceShared extends CloudletScheduler{
-
-	/*
-	 * Title:        CloudSim Toolkit
-	 * Description:  CloudSim (Cloud Simulation) Toolkit for Modeling and Simulation of Clouds
-	 * Licence:      GPL - http://www.gnu.org/copyleft/gpl.html
-	 *
-	 * Copyright (c) 2009-2010, The University of Melbourne, Australia
-	 */
-
-	
-	/**
-	 * CloudletSchedulerSpaceShared implements a policy of
-	 * scheduling performed by a virtual machine. It consider
-	 * that there will be only one cloudlet per VM. Other cloudlets will be in a
-	 * waiting list. We consider that file transfer from cloudlets waiting happens
-	 * before cloudlet execution. I.e., even though cloudlets must wait for CPU,
-	 * data transfer happens as soon as cloudlets are submitted.
-	 *
-	 * @author		Rodrigo N. Calheiros
-	 * @author		Anton Beloglazov
-	 * @since		CloudSim Toolkit 1.0
-	 */
-	
-
-		/** The cloudlet waiting list. */
-		private List<? extends ResCloudlet> cloudletWaitingList;
-
-		/** The cloudlet exec list. */
-		private List<? extends ResCloudlet> cloudletExecList;
-
-		/** The cloudlet paused list. */
-		private List<? extends ResCloudlet> cloudletPausedList;
-
-		/** The cloudlet finished list. */
-		private List<? extends ResCloudlet> cloudletFinishedList;
-
-		/** The current CPUs. */
-		protected int currentCpus;
-
-		/** The used PEs. */
-		protected int usedPes;
-        
-		
-		//for network
-		
-		public Map<Integer,List<NetPacket>> pkttosend;
-		public Map<Integer,List<NetPacket>> pktrecv;
-		
-		/**
-		 * Creates a new CloudletSchedulerSpaceShared object. This method must be invoked
-		 * before starting the actual simulation.
-		 *
-		 * @pre $none
-		 * @post $none
-		 */
-		public CloudletHPCSpaceShared() {
-			super();
-			this.cloudletWaitingList = new ArrayList<ResCloudlet>();
-			this.cloudletExecList = new ArrayList<ResCloudlet>();
-			this.cloudletPausedList = new ArrayList<ResCloudlet>();
-			this.cloudletFinishedList = new ArrayList<ResCloudlet>();
-			this.usedPes = 0;
-			this.currentCpus = 0;
-			this.pkttosend= new HashMap<Integer,List<NetPacket>>();
-			this.pktrecv= new  HashMap<Integer,List<NetPacket>>();
-		}
-
-		/**
-		 * Updates the processing of cloudlets running under management of this scheduler.
-		 *
-		 * @param currentTime current simulation time
-		 * @param mipsShare array with MIPS share of each processor available to the scheduler
-		 *
-		 * @return time predicted completion time of the earliest finishing cloudlet, or 0
-		 * if there is no next events
-		 *
-		 * @pre currentTime >= 0
-		 * @post $none
-		 */
-		@Override
-		public double updateVmProcessing(double currentTime, List<Double> mipsShare) {
-			setCurrentMipsShare(mipsShare);
-			double timeSpam = currentTime - getPreviousTime(); // time since last update
-			double capacity = 0.0;
-			int cpus = 0;
-		
-			for (Double mips : mipsShare) { // count the CPUs available to the VMM
-				capacity += mips;
-				if (mips > 0) {
-					cpus++;
-				}
-			}
-			currentCpus = cpus;
-			capacity /= cpus; // average capacity of each cpu
-            
-			for (ResCloudlet rcl : getCloudletExecList()) { // each machine in the exec list has the same amount of cpu
-			    
-				NetworkCloudlet cl=(NetworkCloudlet) rcl.getCloudlet();
-				if((cl.currStagenum!=-1))
-				{
-					if(cl.currStagenum==Constants.FINISH){
-						//long len=rcl.getRemainingCloudletLength();
-						//rcl.updateCloudletFinishedSoFar(len);
-						break;
-					}
-					TaskStage st= cl.stages.get(cl.currStagenum);
-					if(st.type==Constants.EXECUTION)
-					{
-						
-						//rcl.updateCloudletFinishedSoFar((long) (capacity * Math.round(timeSpam) * rcl.getPesNumber()));
-						//update the time
-				        cl.timespentInStage=Math.round(CloudSim.clock()-cl.timetostartStage);
-				        if(cl.timespentInStage>=st.time) 
-				        {
-				        	changetonextstage(cl,st);
-				        	//change the stage
-				        }
-					}
-					if(st.type==Constants.WAIT_RECV)
-					{
-					   List<NetPacket> pktlist=this.pktrecv.get(st.peer);
-					   List<NetPacket> pkttoremove=new ArrayList<NetPacket>();
-					   if(pktlist!=null)
-					   {   
-						   Iterator it=pktlist.iterator();
-						   NetPacket pkt=null;
-						   if(it.hasNext())
-						   {
-							   pkt=(NetPacket)it.next();
-							   if(pkt.reciever==cl.getVmId())//Asumption packet will not arrive in the same cycle
-							   {
-								   pkt.recievetime=CloudSim.clock();
-								   st.time=CloudSim.clock()-pkt.sendtime;
-								   changetonextstage(cl,st);
-								   pkttoremove.add(pkt);
-							   }
-						   }
-						   pktlist.removeAll(pkttoremove);
-						   //if(pkt!=null)
-						  //else wait for recieving the packet						  					   
-					   }
-					}
-					
-				}
-				else
-				{
-					cl.currStagenum=0;
-					cl.timetostartStage=CloudSim.clock();
-					
-					if(cl.stages.get(0).type==Constants.EXECUTION)
-						NetDatacenterBroker.linkDC.schedule(NetDatacenterBroker.linkDC.getId(),cl.stages.get(0).time, CloudSimTags.VM_DATACENTER_EVENT);
-					else
-						NetDatacenterBroker.linkDC.schedule(NetDatacenterBroker.linkDC.getId(),0.0001, CloudSimTags.VM_DATACENTER_EVENT);
-					///sendstage///
-				}
-					
-				//check status
-				//if execution stage
-				//update the cloudlet finishtime
-				//CHECK WHETHER IT IS WAITING FOR THE PACKET
-			    //	if packet received change the status of job and update the time.
-				//
-				//rcl.updateCloudletFinishedSoFar((long) (capacity * timeSpam * rcl.getPesNumber()));
-			    
-			}
-
-			if (getCloudletExecList().size() == 0 && getCloudletWaitingList().size() == 0) { // no more cloudlets in this scheduler
-				setPreviousTime(currentTime);
-				return 0.0;
-			}
-
-			//update each cloudlet
-			int finished = 0;
-			int cont = 0;
-			List<ResCloudlet> toRemove = new ArrayList<ResCloudlet>();
-			for (ResCloudlet rcl : getCloudletExecList()) {
-				//if (rcl.getRemainingCloudletLength() == 0.0) {// finished anyway, rounding issue...
-				if(((NetworkCloudlet)(rcl.getCloudlet())).currStagenum==Constants.FINISH){	
-				//stage is changed and packet to send
-					((NetworkCloudlet)(rcl.getCloudlet())).finishtime=CloudSim.clock();
-					toRemove.add(rcl);
-					cloudletFinish(rcl);
-					finished++;
-				}
-				cont++;
-			}
-			getCloudletExecList().removeAll(toRemove);
-            //add all the CloudletExecList in waitingList.
-			//sort the waitinglist
-			//
-		      
-			
-	        //for each finished cloudlet, add a new one from the waiting list
-			if (!getCloudletWaitingList().isEmpty()) {
-				for (int i = 0; i < finished; i++) {
-					toRemove.clear();
-					for (ResCloudlet rcl : getCloudletWaitingList()) {
-						if ((currentCpus - usedPes) >= rcl.getPesNumber()) {
-							rcl.setCloudletStatus(Cloudlet.INEXEC);
-							for (int k = 0; k < rcl.getPesNumber(); k++) {
-								rcl.setMachineAndPeId(0, i);
-							}
-							getCloudletExecList().add(rcl);
-							usedPes += rcl.getPesNumber();
-							toRemove.add(rcl);
-							break;
-						}
-					}
-					getCloudletWaitingList().removeAll(toRemove);
-				}// for(cont)
-	        }
-
-	        //estimate finish time of cloudlets in the execution queue
-			double nextEvent = Double.MAX_VALUE;
-			for (ResCloudlet rcl : getCloudletExecList()) {
-				double remainingLength = rcl.getRemainingCloudletLength();
-				double estimatedFinishTime = currentTime + (remainingLength / (capacity * rcl.getPesNumber()));
-				if (estimatedFinishTime - currentTime < 0.1) {
-					estimatedFinishTime = currentTime + 0.1;
-				}
-				if (estimatedFinishTime < nextEvent) {
-					nextEvent = estimatedFinishTime;
-				}
-			}
-			setPreviousTime(currentTime);
-			return nextEvent;
-		}
-
-		private void changetonextstage(NetworkCloudlet cl, TaskStage st) {
-			// TODO Auto-generated method stub
-			cl.timespentInStage=0;
-        	cl.timetostartStage=CloudSim.clock();
-        	int currstage=cl.currStagenum;
-        	if(currstage>=(cl.stages.size()-1))
-        			cl.currStagenum=Constants.FINISH;
-        	else{
-        		cl.currStagenum=currstage+1;
-        		TaskStage st1=cl.stages.get(cl.currStagenum);
-        		int i=0;
-        		for(i=cl.currStagenum;i<cl.stages.size();i++)
-        		{
-        			if(cl.stages.get(i).type==Constants.WAIT_SEND)
-        			{
-        				NetPacket pkt=new NetPacket(cl.getVmId(), cl.stages.get(i).peer, cl.stages.get(i).data, CloudSim.clock(),-1,cl.getCloudletId(),cl.stages.get(i).vpeer);
-        				List<NetPacket> pktlist=this.pkttosend.get(cl.getVmId());
-        				if(pktlist==null)
-        					pktlist=new ArrayList<NetPacket>();
-        				pktlist.add(pkt);
-        				this.pkttosend.put(cl.getVmId(), pktlist);
-        				
-        			}
-        			else break;
-        			
-        		}
-        		NetDatacenterBroker.linkDC.schedule(NetDatacenterBroker.linkDC.getId(),0.0001, CloudSimTags.VM_DATACENTER_EVENT);
-        		if(i==cl.stages.size()) cl.currStagenum=Constants.FINISH;
-        		else {
-        			cl.currStagenum=i;
-        			if(cl.stages.get(i).type==Constants.EXECUTION)
-        				NetDatacenterBroker.linkDC.schedule(NetDatacenterBroker.linkDC.getId(),cl.stages.get(i).time, CloudSimTags.VM_DATACENTER_EVENT);
-        				
-        		}
-        	}
-        	
-		}
-
-		/**
-		 * Cancels execution of a cloudlet.
-		 *
-		 * @param cloudletId ID of the cloudlet being cancealed
-		 *
-		 * @return the canceled cloudlet, $null if not found
-		 *
-		 * @pre $none
-		 * @post $none
-		 */
-		@Override
-		public Cloudlet cloudletCancel(int cloudletId) {
-			//First, looks in the finished queue
-			for (ResCloudlet rcl : getCloudletFinishedList()) {
-				if (rcl.getCloudletId() == cloudletId) {
-					getCloudletFinishedList().remove(rcl);
-					return rcl.getCloudlet();
-				}
-			}
-
-			//Then searches in the exec list
-			for (ResCloudlet rcl : getCloudletExecList()) {
-				if (rcl.getCloudletId() == cloudletId) {
-					getCloudletExecList().remove(rcl);
-					if (rcl.getRemainingCloudletLength() == 0.0) {
-						cloudletFinish(rcl);
-					} else {
-						rcl.setCloudletStatus(Cloudlet.CANCELED);
-					}
-					return rcl.getCloudlet();
-				}
-			}
-
-			//Now, looks in the paused queue
-			for (ResCloudlet rcl : getCloudletPausedList()) {
-				if (rcl.getCloudletId() == cloudletId) {
-					getCloudletPausedList().remove(rcl);
-					return rcl.getCloudlet();
-				}
-			}
-
-			//Finally, looks in the waiting list
-			for (ResCloudlet rcl : getCloudletWaitingList()) {
-				if (rcl.getCloudletId() == cloudletId) {
-					rcl.setCloudletStatus(Cloudlet.CANCELED);
-					getCloudletWaitingList().remove(rcl);
-					return rcl.getCloudlet();
-				}
-			}
-
-			return null;
-
-		}
-
-		/**
-		 * Pauses execution of a cloudlet.
-		 *
-		 * @param cloudletId ID of the cloudlet being paused
-		 *
-		 * @return $true if cloudlet paused, $false otherwise
-		 *
-		 * @pre $none
-		 * @post $none
-		 */
-		@Override
-		public boolean cloudletPause(int cloudletId) {
-			boolean found = false;
-			int position = 0;
-
-			//first, looks for the cloudlet in the exec list
-			for (ResCloudlet rcl : getCloudletExecList()) {
-				if (rcl.getCloudletId() == cloudletId) {
-					found = true;
-					break;
-				}
-				position++;
-			}
-
-			if (found){
-				//moves to the paused list
-				ResCloudlet rgl = getCloudletExecList().remove(position);
-				if (rgl.getRemainingCloudletLength() == 0.0) {
-					cloudletFinish(rgl);
-				} else {
-					rgl.setCloudletStatus(Cloudlet.PAUSED);
-					getCloudletPausedList().add(rgl);
-				}
-				return true;
-
-			}
-
-			//now, look for the cloudlet in the waiting list
-			position = 0;
-			found = false;
-			for (ResCloudlet rcl : getCloudletWaitingList()) {
-				if (rcl.getCloudletId() == cloudletId) {
-					found = true;
-					break;
-				}
-				position++;
-			}
-
-			if (found) {
-				// moves to the paused list
-				ResCloudlet rgl = getCloudletWaitingList().remove(position);
-				if (rgl.getRemainingCloudletLength() == 0.0) {
-					cloudletFinish(rgl);
-				} else {
-					rgl.setCloudletStatus(Cloudlet.PAUSED);
-					getCloudletPausedList().add(rgl);
-				}
-				return true;
-
-			}
-
-			return false;
-		}
-
-		/**
-		 * Processes a finished cloudlet.
-		 *
-		 * @param rcl finished cloudlet
-		 *
-		 * @pre rgl != $null
-		 * @post $none
-		 */
-		@Override
-		public void cloudletFinish(ResCloudlet rcl) {
-			rcl.setCloudletStatus(Cloudlet.SUCCESS);
-			rcl.finalizeCloudlet();
-			getCloudletFinishedList().add(rcl);
-			usedPes -= rcl.getPesNumber();
-		}
-
-		/**
-		 * Resumes execution of a paused cloudlet.
-		 *
-		 * @param cloudletId ID of the cloudlet being resumed
-		 *
-		 * @return $true if the cloudlet was resumed, $false otherwise
-		 *
-		 * @pre $none
-		 * @post $none
-		 */
-		@Override
-		public double cloudletResume(int cloudletId) {
-			boolean found=false;
-			int position=0;
-
-			//look for the cloudlet in the paused list
-			for (ResCloudlet rcl : getCloudletPausedList()) {
-				if (rcl.getCloudletId() == cloudletId) {
-					found = true;
-					break;
-				}
-				position++;
-			}
-
-			if (found){
-				ResCloudlet rcl = getCloudletPausedList().remove(position);
-
-				if ((currentCpus - usedPes) >= rcl.getPesNumber()) {// it can go to the exec list
-					rcl.setCloudletStatus(Cloudlet.INEXEC);
-					for (int i = 0; i < rcl.getPesNumber(); i++) {
-						rcl.setMachineAndPeId(0, i);
-					}
-
-					long size = rcl.getRemainingCloudletLength();
-					size *= rcl.getPesNumber();
-					rcl.getCloudlet().setCloudletLength(size);
-
-					getCloudletExecList().add(rcl);
-					usedPes += rcl.getPesNumber();
-
-					// calculate the expected time for cloudlet completion
-					double capacity = 0.0;
-					int cpus = 0;
-					for (Double mips : getCurrentMipsShare()) {
-						capacity += mips;
-						if (mips > 0) {
-							cpus++;
-						}
-					}
-					currentCpus = cpus;
-					capacity /= cpus;
-
-					long remainingLength = rcl.getRemainingCloudletLength();
-					double estimatedFinishTime = CloudSim.clock() + (remainingLength / (capacity * rcl.getPesNumber()));
-
-					return estimatedFinishTime;
-				} else {// no enough free PEs: go to the waiting queue
-					rcl.setCloudletStatus(Cloudlet.QUEUED);
-
-					long size = rcl.getRemainingCloudletLength();
-					size *= rcl.getPesNumber();
-					rcl.getCloudlet().setCloudletLength(size);
-
-					getCloudletWaitingList().add(rcl);
-					return 0.0;
-				}
-
-			}
-
-			//not found in the paused list: either it is in in the queue, executing or not exist
-			return 0.0;
-
-		}
-
-		/**
-		 * Receives an cloudlet to be executed in the VM managed by this scheduler.
-		 *
-		 * @param cloudlet the submited cloudlet
-		 * @param fileTransferTime time required to move the required files from the SAN to the VM
-		 *
-		 * @return expected finish time of this cloudlet, or 0 if it is in the waiting queue
-		 *
-		 * @pre gl != null
-		 * @post $none
-		 */
-		@Override
-		public double cloudletSubmit(Cloudlet cloudlet, double fileTransferTime) {
-			if ((currentCpus - usedPes) >= cloudlet.getPesNumber()) {// it can go to the exec list
-				ResCloudlet rcl = new ResCloudlet(cloudlet);
-				rcl.setCloudletStatus(Cloudlet.INEXEC);
-				for (int i = 0; i < cloudlet.getPesNumber(); i++) {
-					rcl.setMachineAndPeId(0, i);
-				}
-
-				getCloudletExecList().add(rcl);
-				usedPes += cloudlet.getPesNumber();
-			} else {// no enough free PEs: go to the waiting queue
-				ResCloudlet rcl = new ResCloudlet(cloudlet);
-				rcl.setCloudletStatus(Cloudlet.QUEUED);
-				getCloudletWaitingList().add(rcl);
-				return 0.0;
-			}
-
-			// calculate the expected time for cloudlet completion
-			double capacity = 0.0;
-			int cpus = 0;
-			for (Double mips : getCurrentMipsShare()) {
-				capacity += mips;
-				if (mips > 0) {
-					cpus++;
-				}
-			}
-
-			currentCpus = cpus;
-			capacity /= cpus;
-
-			// use the current capacity to estimate the extra amount of
-			// time to file transferring. It must be added to the cloudlet length
-			double extraSize = capacity * fileTransferTime;
-			long length = cloudlet.getCloudletLength();
-			length += extraSize;
-			cloudlet.setCloudletLength(length);
-			return cloudlet.getCloudletLength() / capacity;
-		}
-
-		/* (non-Javadoc)
-		 * @see cloudsim.CloudletScheduler#cloudletSubmit(cloudsim.Cloudlet)
-		 */
-		@Override
-		public double cloudletSubmit(Cloudlet cloudlet) {
-			cloudletSubmit(cloudlet, 0);
-			return 0;
-		}
-
-		/**
-		 * Gets the status of a cloudlet.
-		 *
-		 * @param cloudletId ID of the cloudlet
-		 *
-		 * @return status of the cloudlet, -1 if cloudlet not found
-		 *
-		 * @pre $none
-		 * @post $none
-		 */
-		@Override
-		public int getCloudletStatus(int cloudletId) {
-			for (ResCloudlet rcl : getCloudletExecList()) {
-				if (rcl.getCloudletId() == cloudletId) {
-					return rcl.getCloudletStatus();
-				}
-			}
-
-			for (ResCloudlet rcl : getCloudletPausedList()) {
-				if (rcl.getCloudletId() == cloudletId) {
-					return rcl.getCloudletStatus();
-				}
-			}
-
-			for (ResCloudlet rcl : getCloudletWaitingList()) {
-				if (rcl.getCloudletId() == cloudletId) {
-					return rcl.getCloudletStatus();
-				}
-			}
-
-			return -1;
-		}
-
-		/**
-		 * Get utilization created by all cloudlets.
-		 *
-		 * @param time the time
-		 *
-		 * @return total utilization
-		 */
-		@Override
-		public double getTotalUtilizationOfCpu(double time) {
-			double totalUtilization = 0;
-			for (ResCloudlet gl : getCloudletExecList()) {
-				totalUtilization += gl.getCloudlet().getUtilizationOfCpu(time);
-			}
-			return totalUtilization;
-		}
-
-		/**
-		 * Informs about completion of some cloudlet in the VM managed
-		 * by this scheduler.
-		 *
-		 * @return $true if there is at least one finished cloudlet; $false otherwise
-		 *
-		 * @pre $none
-		 * @post $none
-		 */
-		@Override
-		public boolean isFinishedCloudlets() {
-			return getCloudletFinishedList().size() > 0;
-		}
-
-		/**
-		 * Returns the next cloudlet in the finished list, $null if this list is empty.
-		 *
-		 * @return a finished cloudlet
-		 *
-		 * @pre $none
-		 * @post $none
-		 */
-		@Override
-		public Cloudlet getNextFinishedCloudlet() {
-			if (getCloudletFinishedList().size() > 0) {
-				return getCloudletFinishedList().remove(0).getCloudlet();
-			}
-			return null;
-		}
-
-		/**
-		 * Returns the number of cloudlets runnning in the virtual machine.
-		 *
-		 * @return number of cloudlets runnning
-		 *
-		 * @pre $none
-		 * @post $none
-		 */
-		@Override
-		public int runningCloudlets() {
-			return getCloudletExecList().size();
-		}
-
-		/**
-		 * Returns one cloudlet to migrate to another vm.
-		 *
-		 * @return one running cloudlet
-		 *
-		 * @pre $none
-		 * @post $none
-		 */
-		@Override
-		public Cloudlet migrateCloudlet() {
-			ResCloudlet rcl = getCloudletExecList().remove(0);
-			rcl.finalizeCloudlet();
-			Cloudlet cl = rcl.getCloudlet();
-			usedPes -= cl.getPesNumber();
-			return cl;
-		}
-
-		/**
-		 * Gets the cloudlet waiting list.
-		 *
-		 * @param <T> the generic type
-		 * @return the cloudlet waiting list
-		 */
-		@SuppressWarnings("unchecked")
-		protected <T extends ResCloudlet> List<T> getCloudletWaitingList() {
-			return (List<T>) cloudletWaitingList;
-		}
-
-		/**
-		 * Cloudlet waiting list.
-		 *
-		 * @param <T> the generic type
-		 * @param cloudletWaitingList the cloudlet waiting list
-		 */
-		protected <T extends ResCloudlet> void cloudletWaitingList(List<T> cloudletWaitingList) {
-			this.cloudletWaitingList = cloudletWaitingList;
-		}
-
-		/**
-		 * Gets the cloudlet exec list.
-		 *
-		 * @param <T> the generic type
-		 * @return the cloudlet exec list
-		 */
-		@SuppressWarnings("unchecked")
-		protected <T extends ResCloudlet> List<T> getCloudletExecList() {
-			return (List<T>) cloudletExecList;
-		}
-
-		/**
-		 * Sets the cloudlet exec list.
-		 *
-		 * @param <T> the generic type
-		 * @param cloudletExecList the new cloudlet exec list
-		 */
-		protected <T extends ResCloudlet> void setCloudletExecList(List<T> cloudletExecList) {
-			this.cloudletExecList = cloudletExecList;
-		}
-
-		/**
-		 * Gets the cloudlet paused list.
-		 *
-		 * @param <T> the generic type
-		 * @return the cloudlet paused list
-		 */
-		@SuppressWarnings("unchecked")
-		protected <T extends ResCloudlet> List<T> getCloudletPausedList() {
-			return (List<T>) cloudletPausedList;
-		}
-
-		/**
-		 * Sets the cloudlet paused list.
-		 *
-		 * @param <T> the generic type
-		 * @param cloudletPausedList the new cloudlet paused list
-		 */
-		protected <T extends ResCloudlet> void setCloudletPausedList(List<T> cloudletPausedList) {
-			this.cloudletPausedList = cloudletPausedList;
-		}
-
-		/**
-		 * Gets the cloudlet finished list.
-		 *
-		 * @param <T> the generic type
-		 * @return the cloudlet finished list
-		 */
-		@SuppressWarnings("unchecked")
-		protected <T extends ResCloudlet> List<T> getCloudletFinishedList() {
-			return (List<T>) cloudletFinishedList;
-		}
-
-		/**
-		 * Sets the cloudlet finished list.
-		 *
-		 * @param <T> the generic type
-		 * @param cloudletFinishedList the new cloudlet finished list
-		 */
-		protected <T extends ResCloudlet> void setCloudletFinishedList(List<T> cloudletFinishedList) {
-			this.cloudletFinishedList = cloudletFinishedList;
-		}
-
-		/* (non-Javadoc)
-		 * @see org.cloudbus.cloudsim.CloudletScheduler#getCurrentRequestedMips()
-		 */
-		@Override
-		public List<Double> getCurrentRequestedMips() {
-			List<Double> mipsShare = new ArrayList<Double>();
-			if (getCurrentMipsShare() != null) {
-				for (Double mips : getCurrentMipsShare()) {
-					mipsShare.add(mips);
-				}
-			}
-			return mipsShare;
-		}
-
-		/* (non-Javadoc)
-		 * @see org.cloudbus.cloudsim.CloudletScheduler#getTotalCurrentAvailableMipsForCloudlet(org.cloudbus.cloudsim.ResCloudlet, java.util.List)
-		 */
-		@Override
-		public double getTotalCurrentAvailableMipsForCloudlet(ResCloudlet rcl, List<Double> mipsShare) {
-			double capacity = 0.0;
-			int cpus = 0;
-			for (Double mips : mipsShare) { // count the cpus available to the vmm
-				capacity += mips;
-				if (mips > 0) {
-					cpus++;
-				}
-			}
-			currentCpus = cpus;
-			capacity /= cpus; // average capacity of each cpu
-			return capacity;
-		}
-
-		/* (non-Javadoc)
-		 * @see org.cloudbus.cloudsim.CloudletScheduler#getTotalCurrentAllocatedMipsForCloudlet(org.cloudbus.cloudsim.ResCloudlet, double)
-		 */
-		@Override
-		public double getTotalCurrentAllocatedMipsForCloudlet(ResCloudlet rcl, double time) {
-			// TODO Auto-generated method stub
-			return 0.0;
-		}
-
-		/* (non-Javadoc)
-		 * @see org.cloudbus.cloudsim.CloudletScheduler#getTotalCurrentRequestedMipsForCloudlet(org.cloudbus.cloudsim.ResCloudlet, double)
-		 */
-		@Override
-		public double getTotalCurrentRequestedMipsForCloudlet(ResCloudlet rcl, double time) {
-			// TODO Auto-generated method stub
-			return 0.0;
-		}
-
-		@Override
-		public double getCurrentRequestedUtilizationOfBw() {
-			// TODO Auto-generated method stub
-			return 0;
-		}
-
-		@Override
-		public double getCurrentRequestedUtilizationOfRam() {
-			// TODO Auto-generated method stub
-			return 0;
-		}
-
-	}
-

modules/cloudsim/src/main/java/org/cloudbus/cloudsim/network/datacenter/EdgeSwitch.java

@@ -11,26 +11,53 @@ import org.cloudbus.cloudsim.core.CloudSimTags;
 import org.cloudbus.cloudsim.core.SimEvent;
 import org.cloudbus.cloudsim.core.predicates.PredicateType;
 
+/**
+ * This class allows to simulate Edge switch for Datacenter network.
+ * It interacts with other switches in order to exchange
+ * packets. Please refer to following publication for more details:
+ * 
+ * Saurabh Kumar Garg and Rajkumar Buyya, NetworkCloudSim: Modelling Parallel 
+ * Applications in Cloud Simulations, Proceedings of the 4th IEEE/ACM International 
+ * Conference on Utility and Cloud Computing (UCC 2011, IEEE CS Press, USA), 
+ * Melbourne, Australia, December 5-7, 2011. 
+ *
+ * @author		Saurabh Kumar Garg
+ * @since		CloudSim Toolkit 3.0
+ * 
+ */
+
 public class EdgeSwitch extends Switch{
 
-	public EdgeSwitch(String name, int dcid, NetworkDatacenter dc) {
-		super(name, dcid, dc);
+	/**
+	 * Constructor for Edge  Switch
+	 * We have to specify switches that are connected to its downlink and uplink ports,
+	 * and corresponding bandwidths. In this switch downlink ports are 
+	 * connected to hosts not to a switch.
+	 *
+	 * @param name Name of the switch 
+	 * @param level At which level switch is with respect to hosts.
+	 * @param dc  Pointer to Datacenter
+	 */
+	
+	public EdgeSwitch(String name, int level, NetworkDatacenter dc) {
+		super(name, level, dc);
 		hostlist=new HashMap<Integer,NetworkHost>();
-		uplinkswitchpktlist=new HashMap<Integer,List<HostPacket>>();
-		packetTohost=new HashMap<Integer,List<HostPacket>>();
-        uplinkbandwidth=Constants.BandWidthEdgeAgg;
-		downlinkbandwidth=Constants.BandWidthEdgeHost;
-		this.switching_delay=Constants.SwitchingDelayEdge;
-		numport=Constants.EdgeSwitchPort;
+		uplinkswitchpktlist=new HashMap<Integer,List<NetworkPacket>>();
+		packetTohost=new HashMap<Integer,List<NetworkPacket>>();
+        uplinkbandwidth=NetworkConstants.BandWidthEdgeAgg;
+		downlinkbandwidth=NetworkConstants.BandWidthEdgeHost;
+		this.switching_delay=NetworkConstants.SwitchingDelayEdge;
+		numport=NetworkConstants.EdgeSwitchPort;
 		uplinkswitches=new ArrayList<Switch>();
 		// TODO Auto-generated constructor stub
 	}
-	private void registerHost(SimEvent ev) {
-		// TODO Auto-generated method stub
-		NetworkHost hs=(NetworkHost)ev.getData();
-		hostlist.put(hs.getId(),(NetworkHost)ev.getData());
-	}
-	private void processpacket_up(SimEvent ev) {
+	/**
+	 * Send Packet to switch connected through a uplink port
+	 *
+	 * @param ev Event/packet to process
+	 */
+	@Override
+	protected void processpacket_up(SimEvent ev) {
 		// TODO Auto-generated method stub
 		//packet coming from down level router/host.
 		//has to send up
@@ -38,7 +65,7 @@ public class EdgeSwitch extends Switch{
 		//add packet in the switch list
 		//
 		//int src=ev.getSource();
-		HostPacket hspkt=(HostPacket) ev.getData();
+		NetworkPacket hspkt=(NetworkPacket) ev.getData();
 	    int recvVMid=hspkt.pkt.reciever;
 	    CloudSim.cancelAll(getId(), new PredicateType(CloudSimTags.Network_Event_send));
 		schedule(getId(),this.switching_delay, CloudSimTags.Network_Event_send);
@@ -54,9 +81,9 @@ public class EdgeSwitch extends Switch{
     	if(hs!=null)
     	{
     		//packet to be sent to host connected to the switch
-    		List<HostPacket> pktlist=this.packetTohost.get(hostid);
+    		List<NetworkPacket> pktlist=this.packetTohost.get(hostid);
 	    	if(pktlist==null){
-	    		pktlist=new ArrayList<HostPacket>();
+	    		pktlist=new ArrayList<NetworkPacket>();
 	    		this.packetTohost.put(hostid, pktlist);
 	    	}
 	    	pktlist.add(hspkt);
@@ -69,9 +96,9 @@ public class EdgeSwitch extends Switch{
     	//if there are more than one Aggregate level switch one need to modify following code
              	
     	Switch sw=this.uplinkswitches.get(0);
-    	List<HostPacket> pktlist=this.uplinkswitchpktlist.get(sw.getId());
+    	List<NetworkPacket> pktlist=this.uplinkswitchpktlist.get(sw.getId());
     	if(pktlist==null){
-    		pktlist=new ArrayList<HostPacket>();
+    		pktlist=new ArrayList<NetworkPacket>();
     		this.uplinkswitchpktlist.put(sw.getId(), pktlist);
     	}
     	pktlist.add(hspkt);
@@ -79,24 +106,31 @@ public class EdgeSwitch extends Switch{
 	  	    
 	   
 	}
-	private void processpacketforward(SimEvent ev) {
+	/**
+	 * Send Packet to hosts connected to the switch
+	 *
+	 * @param ev Event/packet to process
+	 */
+	
+	@Override
+	protected void processpacketforward(SimEvent ev) {
 		// TODO Auto-generated method stub
 		//search for the host and packets..send to them
 		
 		
 		if(this.uplinkswitchpktlist!=null)
 		{
-			for(Entry<Integer, List<HostPacket>> es:uplinkswitchpktlist.entrySet())
+			for(Entry<Integer, List<NetworkPacket>> es:uplinkswitchpktlist.entrySet())
 			{
 				int tosend=es.getKey();
-				List<HostPacket> hspktlist=es.getValue();
+				List<NetworkPacket> hspktlist=es.getValue();
 				if(!hspktlist.isEmpty()){
 					//sharing bandwidth between packets
 					double avband=this.uplinkbandwidth/hspktlist.size();
-					Iterator<HostPacket> it=hspktlist.iterator();
+					Iterator<NetworkPacket> it=hspktlist.iterator();
 					while(it.hasNext())
 					{
-						HostPacket hspkt=it.next();
+						NetworkPacket hspkt=it.next();
 						double delay=1000*hspkt.pkt.data/avband;
 						
 						this.send(tosend,delay,CloudSimTags.Network_Event_UP, hspkt);
@@ -107,16 +141,16 @@ public class EdgeSwitch extends Switch{
 		}
 		if(this.packetTohost!=null)
 		{
-			for(Entry<Integer, List<HostPacket>> es:packetTohost.entrySet())
+			for(Entry<Integer, List<NetworkPacket>> es:packetTohost.entrySet())
 			{
 				int tosend=es.getKey();
 				NetworkHost hs=this.hostlist.get(tosend);
-				List<HostPacket> hspktlist=es.getValue();
+				List<NetworkPacket> hspktlist=es.getValue();
 				if(!hspktlist.isEmpty()){
 					double avband=this.downlinkbandwidth/hspktlist.size();
-					Iterator<HostPacket> it=hspktlist.iterator();
+					Iterator<NetworkPacket> it=hspktlist.iterator();
 					while(it.hasNext()){
-						HostPacket hspkt=it.next();
+						NetworkPacket hspkt=it.next();
 						//hspkt.recieverhostid=tosend;
 						//hs.packetrecieved.add(hspkt);
 						this.send(this.getId(),hspkt.pkt.data/avband,CloudSimTags.Network_Event_Host, hspkt);

modules/cloudsim/src/main/java/org/cloudbus/cloudsim/network/datacenter/HostPacket.java

 package org.cloudbus.cloudsim.network.datacenter;
 
+/**
+ * HostPacket represents the packet that travels through the virtual network with a Host. 
+ * It contains information about cloudlets  which are communicating
+ * 
+ * Please refer to following publication for more details:
+ * 
+ * Saurabh Kumar Garg and Rajkumar Buyya, NetworkCloudSim: Modelling Parallel
+ * Applications in Cloud Simulations, Proceedings of the 4th IEEE/ACM
+ * International Conference on Utility and Cloud Computing (UCC 2011, IEEE CS
+ * Press, USA), Melbourne, Australia, December 5-7, 2011.
+ *
+ * 
+ * @author Saurabh Kumar Garg
+ * @since CloudSim Toolkit 1.0
+ */
+
 public class HostPacket {
-	public HostPacket(int id, NetPacket pkt2, int vmid, int cloudletid) {
-		// TODO Auto-generated constructor stub
-		this.pkt=pkt2;
-		this.sendervmid=vmid;
-		this.cloudletid=cloudletid;
-		this.senderhostid=id;
-		this.stime=pkt.sendtime;
-		this.recievervmid=pkt2.reciever;
-		
+	public HostPacket(int sender, int reciever, double data, double sendtime,
+			double recievetime, int vsnd, int vrvd) {
+		super();
+		this.sender = sender;
+		this.reciever = reciever;
+		this.data = data;
+		this.sendtime = sendtime;
+		this.recievetime = recievetime;
+		this.virtualrecvid = vrvd;
+		this.virtualsendid = vsnd;
 	}
-	NetPacket pkt;
-    int senderhostid;
-    int recieverhostid;
-    int sendervmid;
-    int recievervmid;
-    int cloudletid;
-    double stime;//time when sent
-    double rtime;//time when received
+
+	int sender;
+	int virtualrecvid;
+	int virtualsendid;
+	int reciever;
+	double data;
+	double sendtime;
+	double recievetime;
 }

modules/cloudsim/src/main/java/org/cloudbus/cloudsim/network/datacenter/NetDatacenterBroker.java

@@ -8,9 +8,6 @@ package org.cloudbus.cloudsim.network.datacenter;
  * Copyright (c) 2009-2010, The University of Melbourne, Australia
  */
 
-
-
-
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.LinkedList;
@@ -36,14 +33,13 @@ import org.cloudbus.cloudsim.lists.CloudletList;
 import org.cloudbus.cloudsim.lists.VmList;
 
 /**
- * DatacentreBroker represents a broker
- * acting on behalf of a user. It hides VM management,
- * as vm creation, sumbission of cloudlets to this VMs
- * and destruction of VMs.
- *
- * @author		Rodrigo N. Calheiros
- * @author		Anton Beloglazov
- * @since		CloudSim Toolkit 1.0
+ * NetDatacentreBroker represents a broker acting on behalf of Datacenter
+ * provider. It hides VM management, as vm creation, submission of cloudlets to
+ * this VMs and destruction of VMs. NOTE- It is an example only. It work on behalf of a provider not for
+ * users. One has to implement interaction with user broker to this broker. 
+ * 
+ * @author Saurabh Kumar Garg
+ * @since CloudSim Toolkit 3.0
  */
 public class NetDatacenterBroker extends SimEntity {
 
@@ -54,20 +50,19 @@ public class NetDatacenterBroker extends SimEntity {
 
 	/** The vms created list. */
 	private List<? extends Vm> vmsCreatedList;
-    
+
 	/** The cloudlet list. */
 	private List<? extends NetworkCloudlet> cloudletList;
 
 	private List<? extends AppCloudlet> appCloudletList;
-	/** The cloudlet submitted list. */
+	/** The Appcloudlet submitted list. */
 	private Map<Integer, Integer> appCloudletRecieved;
-	
+
 	private List<? extends Cloudlet> cloudletSubmittedList;
 
 	/** The cloudlet received list. */
 	private List<? extends Cloudlet> cloudletReceivedList;
 
-	
 	/** The cloudlets submitted. */
 	private int cloudletsSubmitted;
 
@@ -93,18 +88,20 @@ public class NetDatacenterBroker extends SimEntity {
 	private Map<Integer, DatacenterCharacteristics> datacenterCharacteristicsList;
 
 	public static NetworkDatacenter linkDC;
-	public boolean createvmflag=true;
-   
-    public static int cachedcloudlet=0;
-    
+	public boolean createvmflag = true;
+
+	public static int cachedcloudlet = 0;
+
 	/**
 	 * Created a new DatacenterBroker object.
-	 *
-	 * @param name 	name to be associated with this entity (as
-	 * required by Sim_entity class from simjava package)
-	 *
-	 * @throws Exception the exception
-	 *
+	 * 
+	 * @param name
+	 *            name to be associated with this entity (as required by
+	 *            Sim_entity class from simjava package)
+	 * 
+	 * @throws Exception
+	 *             the exception
+	 * 
 	 * @pre name != null
 	 * @post $none
 	 */
@@ -117,9 +114,9 @@ public class NetDatacenterBroker extends SimEntity {
 		setAppCloudletList(new ArrayList<AppCloudlet>());
 		setCloudletSubmittedList(new ArrayList<Cloudlet>());
 		setCloudletReceivedList(new ArrayList<Cloudlet>());
-         this.appCloudletRecieved=new HashMap<Integer,Integer>();
-         
-		cloudletsSubmitted=0;
+		this.appCloudletRecieved = new HashMap<Integer, Integer>();
+
+		cloudletsSubmitted = 0;
 		setVmsRequested(0);
 		setVmsAcks(0);
 		setVmsDestroyed(0);
@@ -128,15 +125,16 @@ public class NetDatacenterBroker extends SimEntity {
 		setDatacenterRequestedIdsList(new ArrayList<Integer>());
 		setVmsToDatacentersMap(new HashMap<Integer, Integer>());
 		setDatacenterCharacteristicsList(new HashMap<Integer, DatacenterCharacteristics>());
-		
+
 	}
 
 	/**
-	 * This method is used to send to the broker the list with
-	 * virtual machines that must be created.
-	 *
-	 * @param list the list
-	 *
+	 * This method is used to send to the broker the list with virtual machines
+	 * that must be created.
+	 * 
+	 * @param list
+	 *            the list
+	 * 
 	 * @pre list !=null
 	 * @post $none
 	 */
@@ -145,90 +143,98 @@ public class NetDatacenterBroker extends SimEntity {
 	}
 
 	/**
-	 * This method is used to send to the broker the list of
-	 * cloudlets.
-	 *
-	 * @param list the list
-	 *
+	 * This method is used to send to the broker the list of cloudlets.
+	 * 
+	 * @param list
+	 *            the list
+	 * 
 	 * @pre list !=null
 	 * @post $none
 	 */
-	public void submitCloudletList(List<? extends NetworkCloudlet> list){
+	public void submitCloudletList(List<? extends NetworkCloudlet> list) {
 		getCloudletList().addAll(list);
 	}
 
 	/**
 	 * Specifies that a given cloudlet must run in a specific virtual machine.
-	 *
-	 * @param cloudletId ID of the cloudlet being bount to a vm
-	 * @param vmId the vm id
-	 *
+	 * 
+	 * @param cloudletId
+	 *            ID of the cloudlet being bount to a vm
+	 * @param vmId
+	 *            the vm id
+	 * 
 	 * @pre cloudletId > 0
 	 * @pre id > 0
 	 * @post $none
 	 */
-//	public void bindCloudletToVm(int cloudletId, int vmId){
-//		CloudletList.getById(getCloudletList(), cloudletId).setVmId(vmId);
-//	}
+	// public void bindCloudletToVm(int cloudletId, int vmId){
+	// CloudletList.getById(getCloudletList(), cloudletId).setVmId(vmId);
+	// }
 	public void setLinkDC(NetworkDatacenter linkDC) {
 		this.linkDC = linkDC;
 	}
 
-    /**
-     * Processes events available for this Broker.
-     *
-     * @param ev    a SimEvent object
-     *
-     * @pre ev != null
-     * @post $none
-     */
+	/**
+	 * Processes events available for this Broker.
+	 * 
+	 * @param ev
+	 *            a SimEvent object
+	 * 
+	 * @pre ev != null
+	 * @post $none
+	 */
 	@Override
 	public void processEvent(SimEvent ev) {
-		//Log.printLine(CloudSim.clock()+"[Broker]: event received:"+ev.getTag());
-		switch (ev.getTag()){
-			// Resource characteristics request
-			case CloudSimTags.RESOURCE_CHARACTERISTICS_REQUEST:
-				processResourceCharacteristicsRequest(ev);
-				break;
-			// Resource characteristics answer
-	        case CloudSimTags.RESOURCE_CHARACTERISTICS:
-	        	processResourceCharacteristics(ev);
-	            break;
-	        // VM Creation answer
-	        
-	        //A finished cloudlet returned
-	        case CloudSimTags.CLOUDLET_RETURN:
-	        	processCloudletReturn(ev);
-	            break;
-	        // if the simulation finishes
-	        case CloudSimTags.END_OF_SIMULATION:
-	        	shutdownEntity();
-	            break;
-	        case CloudSimTags.NextCycle:
-	        	if(Constants.BASE)
-	        		this.createVmsInDatacenterBase(this.linkDC.getId());
-	        	
-	        	break;
-            // other unknown tags are processed by this method
-	        default:
-	            processOtherEvent(ev);
-	            break;
+		// Log.printLine(CloudSim.clock()+"[Broker]: event received:"+ev.getTag());
+		switch (ev.getTag()) {
+		// Resource characteristics request
+		case CloudSimTags.RESOURCE_CHARACTERISTICS_REQUEST:
+			processResourceCharacteristicsRequest(ev);
+			break;
+		// Resource characteristics answer
+		case CloudSimTags.RESOURCE_CHARACTERISTICS:
+			processResourceCharacteristics(ev);
+			break;
+		// VM Creation answer
+
+		// A finished cloudlet returned
+		case CloudSimTags.CLOUDLET_RETURN:
+			processCloudletReturn(ev);
+			break;
+		// if the simulation finishes
+		case CloudSimTags.END_OF_SIMULATION:
+			shutdownEntity();
+			break;
+		case CloudSimTags.NextCycle:
+			if (NetworkConstants.BASE)
+				this.createVmsInDatacenterBase(this.linkDC.getId());
+
+			break;
+		// other unknown tags are processed by this method
+		default:
+			processOtherEvent(ev);
+			break;
 		}
 	}
 
 	/**
-	 * Process the return of a request for the characteristics of a PowerDatacenter.
-	 *
-	 * @param ev a SimEvent object
-	 *
+	 * Process the return of a request for the characteristics of a
+	 * PowerDatacenter.
+	 * 
+	 * @param ev
+	 *            a SimEvent object
+	 * 
 	 * @pre ev != $null
 	 * @post $none
 	 */
 	protected void processResourceCharacteristics(SimEvent ev) {
-		DatacenterCharacteristics characteristics = (DatacenterCharacteristics) ev.getData();
-		getDatacenterCharacteristicsList().put(characteristics.getId(), characteristics);
+		DatacenterCharacteristics characteristics = (DatacenterCharacteristics) ev
+				.getData();
+		getDatacenterCharacteristicsList().put(characteristics.getId(),
+				characteristics);
 
-		if (getDatacenterCharacteristicsList().size() == getDatacenterIdsList().size()) {
+		if (getDatacenterCharacteristicsList().size() == getDatacenterIdsList()
+				.size()) {
 			setDatacenterRequestedIdsList(new ArrayList<Integer>());
 			createVmsInDatacenterBase(getDatacenterIdsList().get(0));
 		}
@@ -236,60 +242,63 @@ public class NetDatacenterBroker extends SimEntity {
 
 	/**
 	 * Process a request for the characteristics of a PowerDatacenter.
-	 *
-	 * @param ev a SimEvent object
-	 *
+	 * 
+	 * @param ev
+	 *            a SimEvent object
+	 * 
 	 * @pre ev != $null
 	 * @post $none
 	 */
-	
-	
-	
-	
-	
-	
-	
+
 	protected void processResourceCharacteristicsRequest(SimEvent ev) {
 		setDatacenterIdsList(CloudSim.getCloudResourceList());
 		setDatacenterCharacteristicsList(new HashMap<Integer, DatacenterCharacteristics>());
 
-		Log.printLine(CloudSim.clock()+": "+getName()+ ": Cloud Resource List received with "+getDatacenterIdsList().size()+" resource(s)");
+		Log.printLine(CloudSim.clock() + ": " + getName()
+				+ ": Cloud Resource List received with "
+				+ getDatacenterIdsList().size() + " resource(s)");
 
 		for (Integer datacenterId : getDatacenterIdsList()) {
-			sendNow(datacenterId, CloudSimTags.RESOURCE_CHARACTERISTICS, getId());
+			sendNow(datacenterId, CloudSimTags.RESOURCE_CHARACTERISTICS,
+					getId());
 		}
 	}
 
 	/**
 	 * Process the ack received due to a request for VM creation.
-	 *
-	 * @param ev a SimEvent object
-	 *
+	 * 
+	 * @param ev
+	 *            a SimEvent object
+	 * 
 	 * @pre ev != null
 	 * @post $none
 	 */
-	
+
 	/**
 	 * Process a cloudlet return event.
-	 *
-	 * @param ev a SimEvent object
-	 *
+	 * 
+	 * @param ev
+	 *            a SimEvent object
+	 * 
 	 * @pre ev != $null
 	 * @post $none
 	 */
 	protected void processCloudletReturn(SimEvent ev) {
 		Cloudlet cloudlet = (Cloudlet) ev.getData();
 		getCloudletReceivedList().add(cloudlet);
-		//Log.printLine(CloudSim.clock()+": "+getName()+ ": Cloudlet "+cloudlet.getCloudletId()+" received");
+		// Log.printLine(CloudSim.clock()+": "+getName()+
+		// ": Cloudlet "+cloudlet.getCloudletId()+" received");
 		cloudletsSubmitted--;
-		if (getCloudletList().size()==0&&cloudletsSubmitted==0&& Constants.iteration>10) { //all cloudlets executed
-			Log.printLine(CloudSim.clock()+": "+getName()+ ": All Cloudlets executed. Finishing...");
+		if (getCloudletList().size() == 0 && cloudletsSubmitted == 0
+				&& NetworkConstants.iteration > 10) { // all cloudlets executed
+			Log.printLine(CloudSim.clock() + ": " + getName()
+					+ ": All Cloudlets executed. Finishing...");
 			clearDatacenters();
 			finishExecution();
-		} else { //some cloudlets haven't finished yet
-			if (getAppCloudletList().size()>0 && cloudletsSubmitted==0) {
-				//all the cloudlets sent finished. It means that some bount
-				//cloudlet is waiting its VM be created
+		} else { // some cloudlets haven't finished yet
+			if (getAppCloudletList().size() > 0 && cloudletsSubmitted == 0) {
+				// all the cloudlets sent finished. It means that some bount
+				// cloudlet is waiting its VM be created
 				clearDatacenters();
 				createVmsInDatacenterBase(0);
 			}
@@ -300,154 +309,157 @@ public class NetDatacenterBroker extends SimEntity {
 	/**
 	 * Overrides this method when making a new and different type of Broker.
 	 * This method is called by {@link #body()} for incoming unknown tags.
-	 *
-	 * @param ev   a SimEvent object
-	 *
+	 * 
+	 * @param ev
+	 *            a SimEvent object
+	 * 
 	 * @pre ev != null
 	 * @post $none
 	 */
-    protected void processOtherEvent(SimEvent ev){
-        if (ev == null){
-            Log.printLine(getName() + ".processOtherEvent(): " + "Error - an event is null.");
-            return;
-        }
-
-        Log.printLine(getName() + ".processOtherEvent(): " + "Error - event unknown by this DatacenterBroker.");
-    }
-
-    /**
-     * Create the virtual machines in a datacenter.
-     *
-     * @param datacenterId Id of the chosen PowerDatacenter
-     *
-     * @pre $none
-     * @post $none
-     */
-    protected void createVmsInDatacenterBase(int datacenterId) {
-		// send as much vms as possible for this datacenter before trying the next one
+	protected void processOtherEvent(SimEvent ev) {
+		if (ev == null) {
+			Log.printLine(getName() + ".processOtherEvent(): "
+					+ "Error - an event is null.");
+			return;
+		}
+
+		Log.printLine(getName() + ".processOtherEvent(): "
+				+ "Error - event unknown by this DatacenterBroker.");
+	}
+
+	/**
+	 * Create the virtual machines in a datacenter and submit/schedule cloudlets
+	 * to them.
+	 * 
+	 * @param datacenterId
+	 *            Id of the chosen PowerDatacenter
+	 * 
+	 * @pre $none
+	 * @post $none
+	 */
+	protected void createVmsInDatacenterBase(int datacenterId) {
+		// send as much vms as possible for this datacenter before trying the
+		// next one
 		int requestedVms = 0;
 		String datacenterName = CloudSim.getEntityName(datacenterId);
-		int j=0;
-		
-		//All host will have two VMs (assumption) VM is the minimum unit
-		
-		if(createvmflag)
-		  {
-				CreateVMs(datacenterId);
-				createvmflag=false;
-		  }
-		
-		//generate Request
-		//RequestGenerator reqgen=new RequestGenerator();
-		
-		//OptionPricingRequest[] reqs=reqgen.getNextRequests(1);
-		
-		for(int i=0;i<100;i++)
-		{
-			this.getAppCloudletList().add(new WorkflowApp(AppCloudlet.APP_Workflow, Constants.currentAppId, 0, 0, this.getId()));
-			//this.getAppCloudletList().add(reqs[i].getAppCloudlet(0,));
-			Constants.currentAppId++;
-			
+		int j = 0;
+
+		// All host will have two VMs (assumption) VM is the minimum unit
+
+		if (createvmflag) {
+			CreateVMs(datacenterId);
+			createvmflag = false;
+		}
+
+		// generate Application execution Requests
+
+		for (int i = 0; i < 100; i++) {
+			this.getAppCloudletList().add(
+					new WorkflowApp(AppCloudlet.APP_Workflow,
+							NetworkConstants.currentAppId, 0, 0, this.getId()));
+			NetworkConstants.currentAppId++;
+
 		}
-		int seed=5;
-		int k=0;
-		int totalvm=this.vmsCreatedList.size();
-		int currentvmid=0;
-		for(AppCloudlet app:this.getAppCloudletList())
-		{
-			
-		     List<Integer> vmids=new ArrayList<Integer>();
-		     int numVms=this.linkDC.getVmList().size();
-		     UniformDistr ufrnd=new UniformDistr(0,numVms,5);
-		     for(int i=0;i<app.numbervm;i++)
-		     {
-		    	 
-		    	// int vmid=currentvmid%numVms;//
-		    	 int vmid=(int)ufrnd.sample();
-		    	 currentvmid++;
-		    	 vmids.add(vmid);
-		    	 
-		     }
-			
-			if(vmids!=null){
-				if(!vmids.isEmpty()){
-					
-				
+		int seed = 5;
+		int k = 0;
+		int totalvm = this.vmsCreatedList.size();
+		int currentvmid = 0;
+		
+		//schedule the application on VMs
+		for (AppCloudlet app : this.getAppCloudletList()) {
+
+			List<Integer> vmids = new ArrayList<Integer>();
+			int numVms = this.linkDC.getVmList().size();
+			UniformDistr ufrnd = new UniformDistr(0, numVms, 5);
+			for (int i = 0; i < app.numbervm; i++) {
+
+				int vmid = (int) ufrnd.sample();
+				currentvmid++;
+				vmids.add(vmid);
+
+			}
+
+			if (vmids != null) {
+				if (!vmids.isEmpty()) {
+
 					app.createCloudletList(vmids);
-					for(int i=0;i<app.numbervm;i++)
-					{		
+					for (int i = 0; i < app.numbervm; i++) {
 						app.clist.get(i).setUserId(this.getId());
-						//this.getCloudletList().add(app.clist.get(i));
+						// this.getCloudletList().add(app.clist.get(i));
 						this.appCloudletRecieved.put(app.appID, app.numbervm);
 						this.getCloudletSubmittedList().add(app.clist.get(i));
 						this.cloudletsSubmitted++;
-						
-						//Log.printLine(CloudSim.clock()+": "+getName()+ ": Sending cloudlet "+app.clist.get(i).getCloudletId()+" to VM #"+app.clist.get(i).getVmId());
-						sendNow(getVmsToDatacentersMap().get(this.getVmList().get(0).getId()), CloudSimTags.CLOUDLET_SUBMIT, app.clist.get(i));
+
+						// Log.printLine(CloudSim.clock()+": "+getName()+
+						// Sending cloudlet
+						sendNow(getVmsToDatacentersMap().get(
+								this.getVmList().get(0).getId()),
+								CloudSimTags.CLOUDLET_SUBMIT, app.clist.get(i));
 					}
-					System.out.println("app"+(k++));
+					System.out.println("app" + (k++));
 				}
 			}
-			
 
-			}
+		}
 		setAppCloudletList(new ArrayList<AppCloudlet>());
-		if(Constants.iteration<10){
-			
-			Constants.iteration++;
-			this.schedule(this.getId(), Constants.nexttime, CloudSimTags.NextCycle);
+		if (NetworkConstants.iteration < 10) {
+
+			NetworkConstants.iteration++;
+			this.schedule(this.getId(), NetworkConstants.nexttime,
+					CloudSimTags.NextCycle);
 		}
 
-		getDatacenterRequestedIdsList().add(datacenterId);
+		
 
 		setVmsRequested(requestedVms);
 		setVmsAcks(0);
 	}
-    private void CreateVMs(int datacenterId) {
+
+	private void CreateVMs(int datacenterId) {
 		// TODO Auto-generated method stub
-    	int numVM=this.linkDC.getHostList().size()*Constants.maxhostVM; // two VMs per host
-    	for(int i=0;i<numVM;i++)
-    	{
-	    	int requestedVms = 0;
-	    	int vmid = i;
+		int numVM = this.linkDC.getHostList().size() * NetworkConstants.maxhostVM; // two
+																			// VMs
+																			// per
+																			// host
+		for (int i = 0; i < numVM; i++) {
+			int requestedVms = 0;
+			int vmid = i;
 			int mips = 1;
 			long size = 10000; // image size (MB)
 			int ram = 512; // vm memory (MB)
 			long bw = 1000;
-			int pesNumber = Constants.HOST_PEs/Constants.maxhostVM; // number of cpus
+			int pesNumber = NetworkConstants.HOST_PEs / NetworkConstants.maxhostVM; // number
+																		// of
+																		// cpus
 			String vmm = "Xen"; // VMM name
-	
+
 			// create VM
-			NetworkVm vm = new NetworkVm(vmid, this.getId(), mips, pesNumber, ram, bw, size, vmm, new CloudletHPCSpaceShared());
-	        this.linkDC.processVmCreateHPC(vm);
+			NetworkVm vm = new NetworkVm(vmid, this.getId(), mips, pesNumber,
+					ram, bw, size, vmm, new NetworkCloudletSpaceSharedScheduler());
+			this.linkDC.processVmCreateNetwork(vm);
 			// add the VM to the vmList
 			getVmList().add(vm);
 			requestedVms++;
 			getVmsToDatacentersMap().put(vmid, datacenterId);
 			getVmsCreatedList().add(VmList.getById(getVmList(), vmid));
-    	}
+		}
 	}
-    
-    
 
-    
-	
-
-	/**
-     * Submit cloudlets to the created VMs.
-     *
-     * @pre $none
-     * @post $none
 	/**
-	 * Destroy the virtual machines running in datacenters.
-	 *
+	 * Submit cloudlets to the created VMs.
+	 * 
+	 * @pre $none
+	 * @post $none /** Destroy the virtual machines running in datacenters.
+	 * 
 	 * @pre $none
 	 * @post $none
 	 */
 	protected void clearDatacenters() {
 		for (Vm vm : getVmsCreatedList()) {
-			Log.printLine(CloudSim.clock() + ": " + getName() + ": Destroying VM #" + vm.getId());
-			sendNow(getVmsToDatacentersMap().get(vm.getId()), CloudSimTags.VM_DESTROY, vm);
+			Log.printLine(CloudSim.clock() + ": " + getName()
+					+ ": Destroying VM #" + vm.getId());
+			sendNow(getVmsToDatacentersMap().get(vm.getId()),
+					CloudSimTags.VM_DESTROY, vm);
 		}
 
 		getVmsCreatedList().clear();
@@ -455,7 +467,7 @@ public class NetDatacenterBroker extends SimEntity {
 
 	/**
 	 * Send an internal event communicating the end of the simulation.
-	 *
+	 * 
 	 * @pre $none
 	 * @post $none
 	 */
@@ -463,15 +475,19 @@ public class NetDatacenterBroker extends SimEntity {
 		sendNow(getId(), CloudSimTags.END_OF_SIMULATION);
 	}
 
-	/* (non-Javadoc)
+	/*
+	 * (non-Javadoc)
+	 * 
 	 * @see cloudsim.core.SimEntity#shutdownEntity()
 	 */
 	@Override
 	public void shutdownEntity() {
-        Log.printLine(getName() + " is shutting down...");
+		Log.printLine(getName() + " is shutting down...");
 	}
 
-	/* (non-Javadoc)
+	/*
+	 * (non-Javadoc)
+	 * 
 	 * @see cloudsim.core.SimEntity#startEntity()
 	 */
 	@Override
@@ -482,8 +498,9 @@ public class NetDatacenterBroker extends SimEntity {
 
 	/**
 	 * Gets the vm list.
-	 *
-	 * @param <T> the generic type
+	 * 
+	 * @param <T>
+	 *            the generic type
 	 * @return the vm list
 	 */
 	@SuppressWarnings("unchecked")
@@ -493,19 +510,21 @@ public class NetDatacenterBroker extends SimEntity {
 
 	/**
 	 * Sets the vm list.
-	 *
-	 * @param <T> the generic type
-	 * @param vmList the new vm list
+	 * 
+	 * @param <T>
+	 *            the generic type
+	 * @param vmList
+	 *            the new vm list
 	 */
 	protected <T extends Vm> void setVmList(List<T> vmList) {
 		this.vmList = vmList;
 	}
 
-
 	/**
 	 * Gets the cloudlet list.
-	 *
-	 * @param <T> the generic type
+	 * 
+	 * @param <T>
+	 *            the generic type
 	 * @return the cloudlet list
 	 */
 	@SuppressWarnings("unchecked")
@@ -513,29 +532,33 @@ public class NetDatacenterBroker extends SimEntity {
 		return (List<T>) cloudletList;
 	}
 
-
 	/**
 	 * Sets the cloudlet list.
-	 *
-	 * @param <T> the generic type
-	 * @param cloudletList the new cloudlet list
-	 */
-	protected <T extends NetworkCloudlet> void setCloudletList(List<T> cloudletList) {
+	 * 
+	 * @param <T>
+	 *            the generic type
+	 * @param cloudletList
+	 *            the new cloudlet list
+	 */
+	protected <T extends NetworkCloudlet> void setCloudletList(
+			List<T> cloudletList) {
 		this.cloudletList = cloudletList;
 	}
 
-	public<T extends AppCloudlet> List<T>getAppCloudletList() {
-		return (List<T>)appCloudletList;
+	public <T extends AppCloudlet> List<T> getAppCloudletList() {
+		return (List<T>) appCloudletList;
 	}
 
-	public <T extends AppCloudlet> void setAppCloudletList(List<T> appCloudletList) {
+	public <T extends AppCloudlet> void setAppCloudletList(
+			List<T> appCloudletList) {
 		this.appCloudletList = appCloudletList;
 	}
 
 	/**
 	 * Gets the cloudlet submitted list.
-	 *
-	 * @param <T> the generic type
+	 * 
+	 * @param <T>
+	 *            the generic type
 	 * @return the cloudlet submitted list
 	 */
 	@SuppressWarnings("unchecked")
@@ -543,21 +566,24 @@ public class NetDatacenterBroker extends SimEntity {
 		return (List<T>) cloudletSubmittedList;
 	}
 
-
 	/**
 	 * Sets the cloudlet submitted list.
-	 *
-	 * @param <T> the generic type
-	 * @param cloudletSubmittedList the new cloudlet submitted list
-	 */
-	protected <T extends Cloudlet> void setCloudletSubmittedList(List<T> cloudletSubmittedList) {
+	 * 
+	 * @param <T>
+	 *            the generic type
+	 * @param cloudletSubmittedList
+	 *            the new cloudlet submitted list
+	 */
+	protected <T extends Cloudlet> void setCloudletSubmittedList(
+			List<T> cloudletSubmittedList) {
 		this.cloudletSubmittedList = cloudletSubmittedList;
 	}
 
 	/**
 	 * Gets the cloudlet received list.
-	 *
-	 * @param <T> the generic type
+	 * 
+	 * @param <T>
+	 *            the generic type
 	 * @return the cloudlet received list
 	 */
 	@SuppressWarnings("unchecked")
@@ -567,18 +593,22 @@ public class NetDatacenterBroker extends SimEntity {
 
 	/**
 	 * Sets the cloudlet received list.
-	 *
-	 * @param <T> the generic type
-	 * @param cloudletReceivedList the new cloudlet received list
-	 */
-	protected <T extends Cloudlet> void setCloudletReceivedList(List<T> cloudletReceivedList) {
+	 * 
+	 * @param <T>
+	 *            the generic type
+	 * @param cloudletReceivedList
+	 *            the new cloudlet received list
+	 */
+	protected <T extends Cloudlet> void setCloudletReceivedList(
+			List<T> cloudletReceivedList) {
 		this.cloudletReceivedList = cloudletReceivedList;
 	}
 
 	/**
 	 * Gets the vm list.
-	 *
-	 * @param <T> the generic type
+	 * 
+	 * @param <T>
+	 *            the generic type
 	 * @return the vm list
 	 */
 	@SuppressWarnings("unchecked")
@@ -588,9 +618,11 @@ public class NetDatacenterBroker extends SimEntity {
 
 	/**
 	 * Sets the vm list.
-	 *
-	 * @param <T> the generic type
-	 * @param vmsCreatedList the vms created list
+	 * 
+	 * @param <T>
+	 *            the generic type
+	 * @param vmsCreatedList
+	 *            the vms created list
 	 */
 	protected <T extends Vm> void setVmsCreatedList(List<T> vmsCreatedList) {
 		this.vmsCreatedList = vmsCreatedList;
@@ -598,7 +630,7 @@ public class NetDatacenterBroker extends SimEntity {
 
 	/**
 	 * Gets the vms requested.
-	 *
+	 * 
 	 * @return the vms requested
 	 */
 	protected int getVmsRequested() {
@@ -607,8 +639,9 @@ public class NetDatacenterBroker extends SimEntity {
 
 	/**
 	 * Sets the vms requested.
-	 *
-	 * @param vmsRequested the new vms requested
+	 * 
+	 * @param vmsRequested
+	 *            the new vms requested
 	 */
 	protected void setVmsRequested(int vmsRequested) {
 		this.vmsRequested = vmsRequested;
@@ -616,7 +649,7 @@ public class NetDatacenterBroker extends SimEntity {
 
 	/**
 	 * Gets the vms acks.
-	 *
+	 * 
 	 * @return the vms acks
 	 */
 	protected int getVmsAcks() {
@@ -625,8 +658,9 @@ public class NetDatacenterBroker extends SimEntity {
 
 	/**
 	 * Sets the vms acks.
-	 *
-	 * @param vmsAcks the new vms acks
+	 * 
+	 * @param vmsAcks
+	 *            the new vms acks
 	 */
 	protected void setVmsAcks(int vmsAcks) {
 		this.vmsAcks = vmsAcks;
@@ -641,7 +675,7 @@ public class NetDatacenterBroker extends SimEntity {
 
 	/**
 	 * Gets the vms destroyed.
-	 *
+	 * 
 	 * @return the vms destroyed
 	 */
 	protected int getVmsDestroyed() {
@@ -650,8 +684,9 @@ public class NetDatacenterBroker extends SimEntity {
 
 	/**
 	 * Sets the vms destroyed.
-	 *
-	 * @param vmsDestroyed the new vms destroyed
+	 * 
+	 * @param vmsDestroyed
+	 *            the new vms destroyed
 	 */
 	protected void setVmsDestroyed(int vmsDestroyed) {
 		this.vmsDestroyed = vmsDestroyed;
@@ -659,7 +694,7 @@ public class NetDatacenterBroker extends SimEntity {
 
 	/**
 	 * Gets the datacenter ids list.
-	 *
+	 * 
 	 * @return the datacenter ids list
 	 */
 	protected List<Integer> getDatacenterIdsList() {
@@ -668,8 +703,9 @@ public class NetDatacenterBroker extends SimEntity {
 
 	/**
 	 * Sets the datacenter ids list.
-	 *
-	 * @param datacenterIdsList the new datacenter ids list
+	 * 
+	 * @param datacenterIdsList
+	 *            the new datacenter ids list
 	 */
 	protected void setDatacenterIdsList(List<Integer> datacenterIdsList) {
 		this.datacenterIdsList = datacenterIdsList;
@@ -677,7 +713,7 @@ public class NetDatacenterBroker extends SimEntity {
 
 	/**
 	 * Gets the vms to datacenters map.
-	 *
+	 * 
 	 * @return the vms to datacenters map
 	 */
 	protected Map<Integer, Integer> getVmsToDatacentersMap() {
@@ -686,16 +722,18 @@ public class NetDatacenterBroker extends SimEntity {
 
 	/**
 	 * Sets the vms to datacenters map.
-	 *
-	 * @param vmsToDatacentersMap the vms to datacenters map
+	 * 
+	 * @param vmsToDatacentersMap
+	 *            the vms to datacenters map
 	 */
-	protected void setVmsToDatacentersMap(Map<Integer, Integer> vmsToDatacentersMap) {
+	protected void setVmsToDatacentersMap(
+			Map<Integer, Integer> vmsToDatacentersMap) {
 		this.vmsToDatacentersMap = vmsToDatacentersMap;
 	}
 
 	/**
 	 * Gets the datacenter characteristics list.
-	 *
+	 * 
 	 * @return the datacenter characteristics list
 	 */
 	protected Map<Integer, DatacenterCharacteristics> getDatacenterCharacteristicsList() {
@@ -704,16 +742,18 @@ public class NetDatacenterBroker extends SimEntity {
 
 	/**
 	 * Sets the datacenter characteristics list.
-	 *
-	 * @param datacenterCharacteristicsList the datacenter characteristics list
+	 * 
+	 * @param datacenterCharacteristicsList
+	 *            the datacenter characteristics list
 	 */
-	protected void setDatacenterCharacteristicsList(Map<Integer, DatacenterCharacteristics> datacenterCharacteristicsList) {
+	protected void setDatacenterCharacteristicsList(
+			Map<Integer, DatacenterCharacteristics> datacenterCharacteristicsList) {
 		this.datacenterCharacteristicsList = datacenterCharacteristicsList;
 	}
 
 	/**
 	 * Gets the datacenter requested ids list.
-	 *
+	 * 
 	 * @return the datacenter requested ids list
 	 */
 	protected List<Integer> getDatacenterRequestedIdsList() {
@@ -722,10 +762,12 @@ public class NetDatacenterBroker extends SimEntity {
 
 	/**
 	 * Sets the datacenter requested ids list.
-	 *
-	 * @param datacenterRequestedIdsList the new datacenter requested ids list
+	 * 
+	 * @param datacenterRequestedIdsList
+	 *            the new datacenter requested ids list
 	 */
-	protected void setDatacenterRequestedIdsList(List<Integer> datacenterRequestedIdsList) {
+	protected void setDatacenterRequestedIdsList(
+			List<Integer> datacenterRequestedIdsList) {
 		this.datacenterRequestedIdsList = datacenterRequestedIdsList;
 	}
 

modules/cloudsim/src/main/java/org/cloudbus/cloudsim/network/datacenter/NetPacket.java

-package org.cloudbus.cloudsim.network.datacenter;
-
-public class NetPacket {
-     public NetPacket(int sender, int reciever, double data, double sendtime,
-			double recievetime,int vsnd,int vrvd) {
-		super();
-		this.sender = sender;
-		this.reciever = reciever;
-		this.data = data;
-		this.sendtime = sendtime;
-		this.recievetime = recievetime;
-		this.virtualrecvid=vrvd;
-		this.virtualsendid=vsnd;
-	}
-	int sender;
-	int virtualrecvid;
-	int virtualsendid;
-     int reciever;
-     double data;
-     double sendtime;
-     double recievetime;
-}

modules/cloudsim/src/main/java/org/cloudbus/cloudsim/network/datacenter/NetworkCloudlet.java

 package org.cloudbus.cloudsim.network.datacenter;
 
-
 import java.util.ArrayList;
 import java.util.Map;
 
 import org.cloudbus.cloudsim.Cloudlet;
 import org.cloudbus.cloudsim.UtilizationModel;
+/**
+ * NetworkCloudlet class extends Cloudlet to support simulation of complex applications. 
+ * Each such network Cloudlet represents a task of the application. Each task consists of several
+ * stages. 
+ * 
+ * Please refer to following publication for more details:
+ * 
+ * Saurabh Kumar Garg and Rajkumar Buyya, NetworkCloudSim: Modelling Parallel
+ * Applications in Cloud Simulations, Proceedings of the 4th IEEE/ACM
+ * International Conference on Utility and Cloud Computing (UCC 2011, IEEE CS
+ * Press, USA), Melbourne, Australia, December 5-7, 2011.
+ *
+ * 
+ * @author Saurabh Kumar Garg
+ * @since CloudSim Toolkit 1.0
+ */
+public class NetworkCloudlet extends Cloudlet implements Comparable {
 
-
-public class NetworkCloudlet extends Cloudlet implements Comparable{
-	
 	long memory;
 
-	public NetworkCloudlet(int cloudletId, long cloudletLength,
-			int pesNumber, long cloudletFileSize, long cloudletOutputSize, long memory,
+	public NetworkCloudlet(int cloudletId, long cloudletLength, int pesNumber,
+			long cloudletFileSize, long cloudletOutputSize, long memory,
 			UtilizationModel utilizationModelCpu,
 			UtilizationModel utilizationModelRam,
 			UtilizationModel utilizationModelBw) {
@@ -21,41 +34,36 @@ public class NetworkCloudlet extends Cloudlet implements Comparable{
 				cloudletOutputSize, utilizationModelCpu, utilizationModelRam,
 				utilizationModelBw);
 		// TODO Auto-generated constructor stub
-		currStagenum=-1;
-		this.memory=memory;
-		stages=new ArrayList<TaskStage>();
+		currStagenum = -1;
+		this.memory = memory;
+		stages = new ArrayList<TaskStage>();
 	}
-	public double submittime;
-	public double finishtime;
-	public double exetime;
-    public double numStage;
-	public int currStagenum;
+
+	public double submittime; //time when cloudlet will be submitted
+	public double finishtime; //time when cloudlet finish execution
+	public double exetime; //execution time for cloudlet
+	public double numStage;//number of stages in cloudlet
+	public int currStagenum; //current stage of cloudlet execution
 	public double timetostartStage;
-	public double timespentInStage;
-	public Map<Double, NetPacket> timeCommunicate;
-	
-	public ArrayList<TaskStage> stages;
-	
-	public double starttime;
-	
+	public double timespentInStage; //how much time spent in particular stage
+	public Map<Double, HostPacket> timeCommunicate;
+
+	public ArrayList<TaskStage> stages; //all stages which cloudlet execution consists of. 
 
+	public double starttime;
 
 	@Override
 	public int compareTo(Object arg0) {
 		// TODO Auto-generated method stub
-		NetworkCloudlet s1=(NetworkCloudlet)arg0;
-		int alpha=0;
-		
-		
+		NetworkCloudlet s1 = (NetworkCloudlet) arg0;
+		int alpha = 0;
+
 		return 0;
 	}
 
-
-
 	public double getSubmittime() {
 		// TODO Auto-generated method stub
 		return submittime;
 	};
-	
-    
+
 }

modules/cloudsim/src/main/java/org/cloudbus/cloudsim/network/datacenter/CloudletHPCSpaceSharedO.java → modules/cloudsim/src/main/java/org/cloudbus/cloudsim/network/datacenter/NetworkCloudletSpaceSharedScheduler.java

 package org.cloudbus.cloudsim.network.datacenter;
 
-
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Collections;
@@ -16,30 +15,28 @@ import org.cloudbus.cloudsim.ResCloudlet;
 import org.cloudbus.cloudsim.core.CloudSim;
 import org.cloudbus.cloudsim.core.CloudSimTags;
 
-public class CloudletHPCSpaceSharedO extends CloudletScheduler{
-
-/*
- * Title:        CloudSim Toolkit
- * Description:  CloudSim (Cloud Simulation) Toolkit for Modeling and Simulation of Clouds
- * Licence:      GPL - http://www.gnu.org/copyleft/gpl.html
- *
- * Copyright (c) 2009-2010, The University of Melbourne, Australia
- */
+public class NetworkCloudletSpaceSharedScheduler extends CloudletScheduler {
 
+	/*
+	 * Title: CloudSim Toolkit Description: CloudSim (Cloud Simulation) Toolkit
+	 * for Modeling and Simulation of Clouds Licence: GPL -
+	 * http://www.gnu.org/copyleft/gpl.html
+	 * 
+	 * Copyright (c) 2009-2010, The University of Melbourne, Australia
+	 */
 
-/**
- * CloudletSchedulerSpaceShared implements a policy of
- * scheduling performed by a virtual machine. It consider
- * that there will be only one cloudlet per VM. Other cloudlets will be in a
- * waiting list. We consider that file transfer from cloudlets waiting happens
- * before cloudlet execution. I.e., even though cloudlets must wait for CPU,
- * data transfer happens as soon as cloudlets are submitted.
- *
- * @author		Rodrigo N. Calheiros
- * @author		Anton Beloglazov
- * @since		CloudSim Toolkit 1.0
- */
-
+	/**
+	 * CloudletSchedulerSpaceShared implements a policy of scheduling performed
+	 * by a virtual machine. It consider that there will be only one cloudlet
+	 * per VM. Other cloudlets will be in a waiting list. We consider that file
+	 * transfer from cloudlets waiting happens before cloudlet execution. I.e.,
+	 * even though cloudlets must wait for CPU, data transfer happens as soon as
+	 * cloudlets are submitted.
+	 * 
+	 * @author Saurabh Kumar Garg	
+	 * @author Saurabh Kumar Garg
+	 * @since CloudSim Toolkit 3.0
+	 */
 
 	/** The cloudlet waiting list. */
 	private List<? extends ResCloudlet> cloudletWaitingList;
@@ -58,23 +55,20 @@ public class CloudletHPCSpaceSharedO extends CloudletScheduler{
 
 	/** The used PEs. */
 	protected int usedPes;
-    
-	
-	//for network
-	private ResCloudlet buffered;//to overlap with communication
-	private double lastbufferUpdateTime;
-	
-	public Map<Integer,List<NetPacket>> pkttosend;
-	public Map<Integer,List<NetPacket>> pktrecv;
-	
+
+	// for network
+
+	public Map<Integer, List<HostPacket>> pkttosend;
+	public Map<Integer, List<HostPacket>> pktrecv;
+
 	/**
-	 * Creates a new CloudletSchedulerSpaceShared object. This method must be invoked
-	 * before starting the actual simulation.
-	 *
+	 * Creates a new CloudletSchedulerSpaceShared object. This method must be
+	 * invoked before starting the actual simulation.
+	 * 
 	 * @pre $none
 	 * @post $none
 	 */
-	public CloudletHPCSpaceSharedO() {
+	public NetworkCloudletSpaceSharedScheduler() {
 		super();
 		this.cloudletWaitingList = new ArrayList<ResCloudlet>();
 		this.cloudletExecList = new ArrayList<ResCloudlet>();
@@ -82,29 +76,34 @@ public class CloudletHPCSpaceSharedO extends CloudletScheduler{
 		this.cloudletFinishedList = new ArrayList<ResCloudlet>();
 		this.usedPes = 0;
 		this.currentCpus = 0;
-		this.pkttosend= new HashMap<Integer,List<NetPacket>>();
-		this.pktrecv= new  HashMap<Integer,List<NetPacket>>();
-		//this.buffered=new ArrayList<ResCloudlet>();
+		this.pkttosend = new HashMap<Integer, List<HostPacket>>();
+		this.pktrecv = new HashMap<Integer, List<HostPacket>>();
 	}
 
 	/**
-	 * Updates the processing of cloudlets running under management of this scheduler.
-	 *
-	 * @param currentTime current simulation time
-	 * @param mipsShare array with MIPS share of each processor available to the scheduler
-	 *
-	 * @return time predicted completion time of the earliest finishing cloudlet, or 0
-	 * if there is no next events
-	 *
+	 * Updates the processing of cloudlets running under management of this
+	 * scheduler.
+	 * 
+	 * @param currentTime
+	 *            current simulation time
+	 * @param mipsShare
+	 *            array with MIPS share of each processor available to the
+	 *            scheduler
+	 * 
+	 * @return time predicted completion time of the earliest finishing
+	 *         cloudlet, or 0 if there is no next events
+	 * 
 	 * @pre currentTime >= 0
 	 * @post $none
 	 */
+	@Override
 	public double updateVmProcessing(double currentTime, List<Double> mipsShare) {
 		setCurrentMipsShare(mipsShare);
-		double timeSpam = currentTime - getPreviousTime(); // time since last update
+		double timeSpam = currentTime - getPreviousTime(); // time since last
+															// update
 		double capacity = 0.0;
 		int cpus = 0;
-	
+
 		for (Double mips : mipsShare) { // count the CPUs available to the VMM
 			capacity += mips;
 			if (mips > 0) {
@@ -113,111 +112,102 @@ public class CloudletHPCSpaceSharedO extends CloudletScheduler{
 		}
 		currentCpus = cpus;
 		capacity /= cpus; // average capacity of each cpu
-    if(getCloudletExecList().size()>1)
-    	System.out.println("Something is wrong "+getCloudletExecList().size());
-		for (ResCloudlet rcl : getCloudletExecList()) { // each machine in the exec list has the same amount of cpu
-		    
-			NetworkCloudlet cl=(NetworkCloudlet) rcl.getCloudlet();
-			if((cl.currStagenum!=-1))
-			{
-				if(cl.currStagenum==Constants.FINISH){
-					//long len=rcl.getRemainingCloudletLength();
-					//rcl.updateCloudletFinishedSoFar(len);
+
+		for (ResCloudlet rcl : getCloudletExecList()) { // each machine in the
+														// exec list has the
+														// same amount of cpu
+
+			NetworkCloudlet cl = (NetworkCloudlet) rcl.getCloudlet();
+			
+			// check status
+			// if execution stage
+			// update the cloudlet finishtime
+			// CHECK WHETHER IT IS WAITING FOR THE PACKET
+			// if packet received change the status of job and update the time.
+			//
+			if ((cl.currStagenum != -1)) {
+				if (cl.currStagenum == NetworkConstants.FINISH) {
+					// long len=rcl.getRemainingCloudletLength();
+					// rcl.updateCloudletFinishedSoFar(len);
 					break;
 				}
-				TaskStage st= cl.stages.get(cl.currStagenum);
-				if(st.type==Constants.EXECUTION)
-				{
-					//if(Constants.logflag)
-					//System.out.println(cl.getCloudletId()+ "Cloudlet is in Execution: "+ CloudSim.clock());
-					//rcl.updateCloudletFinishedSoFar((long) (capacity * Math.round(timeSpam) * rcl.getPesNumber()));
-					//update the time
-			        cl.timespentInStage+=Math.round(CloudSim.clock()-cl.timetostartStage);
-			        if(cl.getCloudletId()==198)
-			        	System.out.println("I am in 198 "+CloudSim.clock());
-			        if(cl.timespentInStage>=st.time) 
-			        {
-			        	if(cl.getCloudletId()==198)
-				        	System.out.println("I am in 198 "+CloudSim.clock());
-			        	changetonextstage(cl,st);
-			        	//change the stage
-			        }
+				TaskStage st = cl.stages.get(cl.currStagenum);
+				if (st.type == NetworkConstants.EXECUTION) {
+
+					// rcl.updateCloudletFinishedSoFar((long) (capacity *
+					// Math.round(timeSpam) * rcl.getPesNumber()));
+					// update the time
+					cl.timespentInStage = Math.round(CloudSim.clock()
+							- cl.timetostartStage);
+					if (cl.timespentInStage >= st.time) {
+						changetonextstage(cl, st);
+						// change the stage
+					}
 				}
-				if(st.type==Constants.WAIT_RECV)
-				{
-				   List<NetPacket> pktlist=this.pktrecv.get(st.vpeer);
-				   if(Constants.logflag)
-					System.out.println(cl.getCloudletId()+ "Cloudlet is in Recieve: "+ CloudSim.clock());
-				   List<NetPacket> pkttoremove=new ArrayList<NetPacket>();
-				   if(pktlist!=null){
-					  if(pktlist.size()!=0)
-					  {   
-					   Iterator it=pktlist.iterator();
-					   NetPacket pkt=null;
-					   while(it.hasNext())
-					   {
-						   pkt=(NetPacket)it.next();
-						   if(pkt.virtualrecvid==cl.getCloudletId())//Asumption packet will not arrive in the same cycle
-						   {
-							   pkt.recievetime=CloudSim.clock();
-							   st.time=CloudSim.clock()-pkt.sendtime;
-							  
-							   changetonextstage(cl,st);
-							   pkttoremove.add(pkt);
-						   }
-					   }
-					   pktlist.removeAll(pkttoremove);
-					   //if(pkt!=null)
-					  //else wait for recieving the packet						  					   
-				   }
-				  }
-				  if(buffered!=null)
-					   updatebuffered(CloudSim.clock());
-				   else {
-					   //System.out.println("Update Buffer");
-					   
-				   }
+				if (st.type == NetworkConstants.WAIT_RECV) {
+					List<HostPacket> pktlist = this.pktrecv.get(st.peer);
+					List<HostPacket> pkttoremove = new ArrayList<HostPacket>();
+					if (pktlist != null) {
+						Iterator it = pktlist.iterator();
+						HostPacket pkt = null;
+						if (it.hasNext()) {
+							pkt = (HostPacket) it.next();
+							if (pkt.reciever == cl.getVmId())// Asumption packet
+																// will not
+																// arrive in the
+																// same cycle
+							{
+								pkt.recievetime = CloudSim.clock();
+								st.time = CloudSim.clock() - pkt.sendtime;
+								changetonextstage(cl, st);
+								pkttoremove.add(pkt);
+							}
+						}
+						pktlist.removeAll(pkttoremove);
+						// if(pkt!=null)
+						// else wait for recieving the packet
+					}
 				}
-			
-				
-			}
-			else
-			{
-				cl.currStagenum=0;
-				cl.timetostartStage=CloudSim.clock();
-				
-				if(cl.stages.get(0).type==Constants.EXECUTION)
-					NetDatacenterBroker.linkDC.schedule(NetDatacenterBroker.linkDC.getId(),cl.stages.get(0).time, CloudSimTags.VM_DATACENTER_EVENT);
+
+			} else {
+				cl.currStagenum = 0;
+				cl.timetostartStage = CloudSim.clock();
+
+				if (cl.stages.get(0).type == NetworkConstants.EXECUTION)
+					NetDatacenterBroker.linkDC.schedule(
+							NetDatacenterBroker.linkDC.getId(),
+							cl.stages.get(0).time,
+							CloudSimTags.VM_DATACENTER_EVENT);
 				else
-					NetDatacenterBroker.linkDC.schedule(NetDatacenterBroker.linkDC.getId(),0.0001, CloudSimTags.VM_DATACENTER_EVENT);
-				///sendstage///
+					NetDatacenterBroker.linkDC.schedule(
+							NetDatacenterBroker.linkDC.getId(), 0.0001,
+							CloudSimTags.VM_DATACENTER_EVENT);
+				// /sendstage///
 			}
-				
-			//check status
-			//if execution stage
-			//update the cloudlet finishtime
-			//CHECK WHETHER IT IS WAITING FOR THE PACKET
-		    //	if packet received change the status of job and update the time.
-			//
-			//rcl.updateCloudletFinishedSoFar((long) (capacity * timeSpam * rcl.getPesNumber()));
-		    
+
+			
+
+
 		}
 
-		if (getCloudletExecList().size() == 0 && getCloudletWaitingList().size() == 0) { // no more cloudlets in this scheduler
+		if (getCloudletExecList().size() == 0
+				&& getCloudletWaitingList().size() == 0) { // no more cloudlets
+															// in this scheduler
 			setPreviousTime(currentTime);
 			return 0.0;
 		}
 
-		//update each cloudlet
+		// update each cloudlet
 		int finished = 0;
 		int cont = 0;
 		List<ResCloudlet> toRemove = new ArrayList<ResCloudlet>();
 		for (ResCloudlet rcl : getCloudletExecList()) {
-			//if (rcl.getRemainingCloudletLength() == 0.0) {// finished anyway, rounding issue...
-			if(((NetworkCloudlet)(rcl.getCloudlet())).currStagenum==Constants.FINISH){	
-			//stage is changed and packet to send
-				System.out.println(rcl.getCloudletId()+ "Cloudlet is in finished: "+ CloudSim.clock());
-				((NetworkCloudlet)(rcl.getCloudlet())).finishtime=CloudSim.clock();
+			// if (rcl.getRemainingCloudletLength() == 0.0) {// finished anyway,
+			// rounding issue...
+			if (((NetworkCloudlet) (rcl.getCloudlet())).currStagenum == NetworkConstants.FINISH) {
+				// stage is changed and packet to send
+				((NetworkCloudlet) (rcl.getCloudlet())).finishtime = CloudSim
+						.clock();
 				toRemove.add(rcl);
 				cloudletFinish(rcl);
 				finished++;
@@ -225,66 +215,36 @@ public class CloudletHPCSpaceSharedO extends CloudletScheduler{
 			cont++;
 		}
 		getCloudletExecList().removeAll(toRemove);
-        //add all the CloudletExecList in waitingList.
-		//sort the waitinglist
+		// add all the CloudletExecList in waitingList.
+		// sort the waitinglist
 		//
-	      
-		
-        //for each finished cloudlet, add a new one from the waiting list
+
+		// for each finished cloudlet, add a new one from the waiting list
 		if (!getCloudletWaitingList().isEmpty()) {
-			if(this.buffered==null){
-				buffered=getCloudletWaitingList().get(0);
-				NetworkCloudlet cl=(NetworkCloudlet)(buffered.getCloudlet());
-				cl.currStagenum=0;
-				cl.timetostartStage=CloudSim.clock();
-				
-			}
 			for (int i = 0; i < finished; i++) {
 				toRemove.clear();
 				for (ResCloudlet rcl : getCloudletWaitingList()) {
 					if ((currentCpus - usedPes) >= rcl.getPesNumber()) {
-						NetworkCloudlet cl1=(NetworkCloudlet)(rcl.getCloudlet());
-						if(cl1.currStagenum==Constants.FINISH) 
-						{
-							System.out.println(rcl.getCloudletId()+ "Cloudlet is in finished: "+ CloudSim.clock());
-							((NetworkCloudlet)(rcl.getCloudlet())).finishtime=CloudSim.clock();
-							rcl.setCloudletStatus(Cloudlet.SUCCESS);
-							rcl.finalizeCloudlet();
-							getCloudletFinishedList().add(rcl);
-							toRemove.add(rcl);
-							continue;
-						}
 						rcl.setCloudletStatus(Cloudlet.INEXEC);
 						for (int k = 0; k < rcl.getPesNumber(); k++) {
 							rcl.setMachineAndPeId(0, i);
 						}
-					
-						
 						getCloudletExecList().add(rcl);
 						usedPes += rcl.getPesNumber();
 						toRemove.add(rcl);
-//						if(buffered!=null){
-//							HPCCloudlet cl=(HPCCloudlet)(buffered.getCloudlet());
-//							cl.timetostartStage=CloudSim.clock();
-//						}
-						buffered=null;
 						break;
 					}
 				}
 				getCloudletWaitingList().removeAll(toRemove);
 			}// for(cont)
-        }
+		}
 
-        //estimate finish time of cloudlets in the execution queue
+		// estimate finish time of cloudlets in the execution queue
 		double nextEvent = Double.MAX_VALUE;
 		for (ResCloudlet rcl : getCloudletExecList()) {
 			double remainingLength = rcl.getRemainingCloudletLength();
-			NetworkCloudlet cl=(NetworkCloudlet) rcl.getCloudlet();
-			if(cl.currStagenum==-1)
-			{
-				cl.currStagenum=0;
-			}
-			double estimatedFinishTime = currentTime+cl.stages.get(cl.currStagenum).time;//currentTime + (remainingLength / (capacity * rcl.getPesNumber()));
+			double estimatedFinishTime = currentTime
+					+ (remainingLength / (capacity * rcl.getPesNumber()));
 			if (estimatedFinishTime - currentTime < 0.1) {
 				estimatedFinishTime = currentTime + 0.1;
 			}
@@ -296,96 +256,65 @@ public class CloudletHPCSpaceSharedO extends CloudletScheduler{
 		return nextEvent;
 	}
 
-	private void updatebuffered(double time) {
+	private void changetonextstage(NetworkCloudlet cl, TaskStage st) {
 		// TODO Auto-generated method stub
-		NetworkCloudlet cl=(NetworkCloudlet)(buffered.getCloudlet());
-	
-		if(cl.currStagenum==Constants.FINISH){
-			
-			System.out.println(cl.getCloudletId()+ "Cloudlet is in finished: "+ CloudSim.clock());
-			cl.finishtime=CloudSim.clock();
-			buffered.setCloudletStatus(Cloudlet.SUCCESS);
-			buffered.finalizeCloudlet();
-			getCloudletFinishedList().add(buffered);
-			this.getCloudletWaitingList().remove(buffered);
-			buffered=null;
-			return;
-		}
-		time=CloudSim.clock()-this.lastbufferUpdateTime;
-		TaskStage st= cl.stages.get(cl.currStagenum);
-		
-		if(st.type==Constants.EXECUTION)
-		{
-			
-			//rcl.updateCloudletFinishedSoFar((long) (capacity * Math.round(timeSpam) * rcl.getPesNumber()));
-			//update the time
-	        cl.timespentInStage+=time;
-	        //cl.timetostartStage=CloudSim.clock();
-	        if(cl.timespentInStage>=st.time) 
-	        {
-	        	changetonextstage(cl,st);
-	        	//change the stage
-	        }
+		cl.timespentInStage = 0;
+		cl.timetostartStage = CloudSim.clock();
+		int currstage = cl.currStagenum;
+		if (currstage >= (cl.stages.size() - 1))
+			cl.currStagenum = NetworkConstants.FINISH;
+		else {
+			cl.currStagenum = currstage + 1;
+			TaskStage st1 = cl.stages.get(cl.currStagenum);
+			int i = 0;
+			for (i = cl.currStagenum; i < cl.stages.size(); i++) {
+				if (cl.stages.get(i).type == NetworkConstants.WAIT_SEND) {
+					HostPacket pkt = new HostPacket(cl.getVmId(),
+							cl.stages.get(i).peer, cl.stages.get(i).data,
+							CloudSim.clock(), -1, cl.getCloudletId(),
+							cl.stages.get(i).vpeer);
+					List<HostPacket> pktlist = this.pkttosend.get(cl.getVmId());
+					if (pktlist == null)
+						pktlist = new ArrayList<HostPacket>();
+					pktlist.add(pkt);
+					this.pkttosend.put(cl.getVmId(), pktlist);
+
+				} else
+					break;
+
+			}
+			NetDatacenterBroker.linkDC.schedule(
+					NetDatacenterBroker.linkDC.getId(), 0.0001,
+					CloudSimTags.VM_DATACENTER_EVENT);
+			if (i == cl.stages.size())
+				cl.currStagenum = NetworkConstants.FINISH;
+			else {
+				cl.currStagenum = i;
+				if (cl.stages.get(i).type == NetworkConstants.EXECUTION)
+					NetDatacenterBroker.linkDC.schedule(
+							NetDatacenterBroker.linkDC.getId(),
+							cl.stages.get(i).time,
+							CloudSimTags.VM_DATACENTER_EVENT);
+
+			}
 		}
-	}
 
-	private void changetonextstage(NetworkCloudlet cl, TaskStage st) {
-		// TODO Auto-generated method stub
-		cl.timespentInStage=0;
-    	cl.timetostartStage=CloudSim.clock();
-    	int currstage=cl.currStagenum;
-    	if(currstage>=(cl.stages.size()-1))
-    			cl.currStagenum=Constants.FINISH;
-    	else{
-    		if(cl.currStagenum==Constants.FINISH) return;
-    		cl.currStagenum=currstage+1;
-    		TaskStage st1=cl.stages.get(cl.currStagenum);
-    		int i=0;
-    		for(i=cl.currStagenum;i<cl.stages.size();i++)
-    		{
-    			if(cl.stages.get(i).type==Constants.WAIT_SEND)
-    			{
-    				if(Constants.logflag)
-    				System.out.println(cl.getCloudletId()+ "Cloudlet is in Sending: "+ CloudSim.clock());
-    				NetPacket pkt=new NetPacket(cl.getVmId(), cl.stages.get(i).peer, cl.stages.get(i).data, CloudSim.clock(),-1,cl.getCloudletId(),cl.stages.get(i).vpeer);
-    				List<NetPacket> pktlist=this.pkttosend.get(cl.getVmId());
-    				if(pktlist==null)
-    					pktlist=new ArrayList<NetPacket>();
-    				pktlist.add(pkt);
-    				this.pkttosend.put(cl.getVmId(), pktlist);
-    				
-    			}
-    			else break;
-    			
-    		}
-    		NetDatacenterBroker.linkDC.schedule(NetDatacenterBroker.linkDC.getId(),0.0001, CloudSimTags.VM_DATACENTER_EVENT);
-    		if(i==cl.stages.size()) cl.currStagenum=Constants.FINISH;
-    		else {
-    			cl.currStagenum=i;
-    			if(cl.stages.get(i).type==Constants.EXECUTION)
-    				NetDatacenterBroker.linkDC.schedule(NetDatacenterBroker.linkDC.getId(),cl.stages.get(i).time, CloudSimTags.VM_DATACENTER_EVENT);
-    			if(cl.stages.get(i).type==Constants.WAIT_RECV)
-    			{   if(buffered!=null)
-    					 this.lastbufferUpdateTime=CloudSim.clock();
-    					}	
-    		}
-    	}
-    	
 	}
 
 	/**
 	 * Cancels execution of a cloudlet.
-	 *
-	 * @param cloudletId ID of the cloudlet being cancealed
-	 *
+	 * 
+	 * @param cloudletId
+	 *            ID of the cloudlet being cancealed
+	 * 
 	 * @return the canceled cloudlet, $null if not found
-	 *
+	 * 
 	 * @pre $none
 	 * @post $none
 	 */
 	@Override
 	public Cloudlet cloudletCancel(int cloudletId) {
-		//First, looks in the finished queue
+		// First, looks in the finished queue
 		for (ResCloudlet rcl : getCloudletFinishedList()) {
 			if (rcl.getCloudletId() == cloudletId) {
 				getCloudletFinishedList().remove(rcl);
@@ -393,7 +322,7 @@ public class CloudletHPCSpaceSharedO extends CloudletScheduler{
 			}
 		}
 
-		//Then searches in the exec list
+		// Then searches in the exec list
 		for (ResCloudlet rcl : getCloudletExecList()) {
 			if (rcl.getCloudletId() == cloudletId) {
 				getCloudletExecList().remove(rcl);
@@ -406,7 +335,7 @@ public class CloudletHPCSpaceSharedO extends CloudletScheduler{
 			}
 		}
 
-		//Now, looks in the paused queue
+		// Now, looks in the paused queue
 		for (ResCloudlet rcl : getCloudletPausedList()) {
 			if (rcl.getCloudletId() == cloudletId) {
 				getCloudletPausedList().remove(rcl);
@@ -414,7 +343,7 @@ public class CloudletHPCSpaceSharedO extends CloudletScheduler{
 			}
 		}
 
-		//Finally, looks in the waiting list
+		// Finally, looks in the waiting list
 		for (ResCloudlet rcl : getCloudletWaitingList()) {
 			if (rcl.getCloudletId() == cloudletId) {
 				rcl.setCloudletStatus(Cloudlet.CANCELED);
@@ -429,11 +358,12 @@ public class CloudletHPCSpaceSharedO extends CloudletScheduler{
 
 	/**
 	 * Pauses execution of a cloudlet.
-	 *
-	 * @param cloudletId ID of the cloudlet being paused
-	 *
+	 * 
+	 * @param cloudletId
+	 *            ID of the cloudlet being paused
+	 * 
 	 * @return $true if cloudlet paused, $false otherwise
-	 *
+	 * 
 	 * @pre $none
 	 * @post $none
 	 */
@@ -442,7 +372,7 @@ public class CloudletHPCSpaceSharedO extends CloudletScheduler{
 		boolean found = false;
 		int position = 0;
 
-		//first, looks for the cloudlet in the exec list
+		// first, looks for the cloudlet in the exec list
 		for (ResCloudlet rcl : getCloudletExecList()) {
 			if (rcl.getCloudletId() == cloudletId) {
 				found = true;
@@ -451,8 +381,8 @@ public class CloudletHPCSpaceSharedO extends CloudletScheduler{
 			position++;
 		}
 
-		if (found){
-			//moves to the paused list
+		if (found) {
+			// moves to the paused list
 			ResCloudlet rgl = getCloudletExecList().remove(position);
 			if (rgl.getRemainingCloudletLength() == 0.0) {
 				cloudletFinish(rgl);
@@ -464,7 +394,7 @@ public class CloudletHPCSpaceSharedO extends CloudletScheduler{
 
 		}
 
-		//now, look for the cloudlet in the waiting list
+		// now, look for the cloudlet in the waiting list
 		position = 0;
 		found = false;
 		for (ResCloudlet rcl : getCloudletWaitingList()) {
@@ -493,9 +423,10 @@ public class CloudletHPCSpaceSharedO extends CloudletScheduler{
 
 	/**
 	 * Processes a finished cloudlet.
-	 *
-	 * @param rcl finished cloudlet
-	 *
+	 * 
+	 * @param rcl
+	 *            finished cloudlet
+	 * 
 	 * @pre rgl != $null
 	 * @post $none
 	 */
@@ -509,20 +440,21 @@ public class CloudletHPCSpaceSharedO extends CloudletScheduler{
 
 	/**
 	 * Resumes execution of a paused cloudlet.
-	 *
-	 * @param cloudletId ID of the cloudlet being resumed
-	 *
+	 * 
+	 * @param cloudletId
+	 *            ID of the cloudlet being resumed
+	 * 
 	 * @return $true if the cloudlet was resumed, $false otherwise
-	 *
+	 * 
 	 * @pre $none
 	 * @post $none
 	 */
 	@Override
 	public double cloudletResume(int cloudletId) {
-		boolean found=false;
-		int position=0;
+		boolean found = false;
+		int position = 0;
 
-		//look for the cloudlet in the paused list
+		// look for the cloudlet in the paused list
 		for (ResCloudlet rcl : getCloudletPausedList()) {
 			if (rcl.getCloudletId() == cloudletId) {
 				found = true;
@@ -531,10 +463,11 @@ public class CloudletHPCSpaceSharedO extends CloudletScheduler{
 			position++;
 		}
 
-		if (found){
+		if (found) {
 			ResCloudlet rcl = getCloudletPausedList().remove(position);
 
-			if ((currentCpus - usedPes) >= rcl.getPesNumber()) {// it can go to the exec list
+			if ((currentCpus - usedPes) >= rcl.getPesNumber()) {// it can go to
+																// the exec list
 				rcl.setCloudletStatus(Cloudlet.INEXEC);
 				for (int i = 0; i < rcl.getPesNumber(); i++) {
 					rcl.setMachineAndPeId(0, i);
@@ -560,7 +493,8 @@ public class CloudletHPCSpaceSharedO extends CloudletScheduler{
 				capacity /= cpus;
 
 				long remainingLength = rcl.getRemainingCloudletLength();
-				double estimatedFinishTime = CloudSim.clock() + (remainingLength / (capacity * rcl.getPesNumber()));
+				double estimatedFinishTime = CloudSim.clock()
+						+ (remainingLength / (capacity * rcl.getPesNumber()));
 
 				return estimatedFinishTime;
 			} else {// no enough free PEs: go to the waiting queue
@@ -576,25 +510,32 @@ public class CloudletHPCSpaceSharedO extends CloudletScheduler{
 
 		}
 
-		//not found in the paused list: either it is in in the queue, executing or not exist
+		// not found in the paused list: either it is in in the queue, executing
+		// or not exist
 		return 0.0;
 
 	}
 
 	/**
 	 * Receives an cloudlet to be executed in the VM managed by this scheduler.
-	 *
-	 * @param cloudlet the submited cloudlet
-	 * @param fileTransferTime time required to move the required files from the SAN to the VM
-	 *
-	 * @return expected finish time of this cloudlet, or 0 if it is in the waiting queue
-	 *
+	 * 
+	 * @param cloudlet
+	 *            the submited cloudlet
+	 * @param fileTransferTime
+	 *            time required to move the required files from the SAN to the
+	 *            VM
+	 * 
+	 * @return expected finish time of this cloudlet, or 0 if it is in the
+	 *         waiting queue
+	 * 
 	 * @pre gl != null
 	 * @post $none
 	 */
 	@Override
 	public double cloudletSubmit(Cloudlet cloudlet, double fileTransferTime) {
-		if ((currentCpus - usedPes) >= cloudlet.getPesNumber()) {// it can go to the exec list
+		if ((currentCpus - usedPes) >= cloudlet.getPesNumber()) {// it can go to
+																	// the exec
+																	// list
 			ResCloudlet rcl = new ResCloudlet(cloudlet);
 			rcl.setCloudletStatus(Cloudlet.INEXEC);
 			for (int i = 0; i < cloudlet.getPesNumber(); i++) {
@@ -632,7 +573,9 @@ public class CloudletHPCSpaceSharedO extends CloudletScheduler{
 		return cloudlet.getCloudletLength() / capacity;
 	}
 
-	/* (non-Javadoc)
+	/*
+	 * (non-Javadoc)
+	 * 
 	 * @see cloudsim.CloudletScheduler#cloudletSubmit(cloudsim.Cloudlet)
 	 */
 	@Override
@@ -643,11 +586,12 @@ public class CloudletHPCSpaceSharedO extends CloudletScheduler{
 
 	/**
 	 * Gets the status of a cloudlet.
-	 *
-	 * @param cloudletId ID of the cloudlet
-	 *
+	 * 
+	 * @param cloudletId
+	 *            ID of the cloudlet
+	 * 
 	 * @return status of the cloudlet, -1 if cloudlet not found
-	 *
+	 * 
 	 * @pre $none
 	 * @post $none
 	 */
@@ -676,9 +620,10 @@ public class CloudletHPCSpaceSharedO extends CloudletScheduler{
 
 	/**
 	 * Get utilization created by all cloudlets.
-	 *
-	 * @param time the time
-	 *
+	 * 
+	 * @param time
+	 *            the time
+	 * 
 	 * @return total utilization
 	 */
 	@Override
@@ -691,11 +636,12 @@ public class CloudletHPCSpaceSharedO extends CloudletScheduler{
 	}
 
 	/**
-	 * Informs about completion of some cloudlet in the VM managed
-	 * by this scheduler.
-	 *
-	 * @return $true if there is at least one finished cloudlet; $false otherwise
-	 *
+	 * Informs about completion of some cloudlet in the VM managed by this
+	 * scheduler.
+	 * 
+	 * @return $true if there is at least one finished cloudlet; $false
+	 *         otherwise
+	 * 
 	 * @pre $none
 	 * @post $none
 	 */
@@ -705,10 +651,11 @@ public class CloudletHPCSpaceSharedO extends CloudletScheduler{
 	}
 
 	/**
-	 * Returns the next cloudlet in the finished list, $null if this list is empty.
-	 *
+	 * Returns the next cloudlet in the finished list, $null if this list is
+	 * empty.
+	 * 
 	 * @return a finished cloudlet
-	 *
+	 * 
 	 * @pre $none
 	 * @post $none
 	 */
@@ -722,9 +669,9 @@ public class CloudletHPCSpaceSharedO extends CloudletScheduler{
 
 	/**
 	 * Returns the number of cloudlets runnning in the virtual machine.
-	 *
+	 * 
 	 * @return number of cloudlets runnning
-	 *
+	 * 
 	 * @pre $none
 	 * @post $none
 	 */
@@ -735,9 +682,9 @@ public class CloudletHPCSpaceSharedO extends CloudletScheduler{
 
 	/**
 	 * Returns one cloudlet to migrate to another vm.
-	 *
+	 * 
 	 * @return one running cloudlet
-	 *
+	 * 
 	 * @pre $none
 	 * @post $none
 	 */
@@ -752,8 +699,9 @@ public class CloudletHPCSpaceSharedO extends CloudletScheduler{
 
 	/**
 	 * Gets the cloudlet waiting list.
-	 *
-	 * @param <T> the generic type
+	 * 
+	 * @param <T>
+	 *            the generic type
 	 * @return the cloudlet waiting list
 	 */
 	@SuppressWarnings("unchecked")
@@ -763,18 +711,22 @@ public class CloudletHPCSpaceSharedO extends CloudletScheduler{
 
 	/**
 	 * Cloudlet waiting list.
-	 *
-	 * @param <T> the generic type
-	 * @param cloudletWaitingList the cloudlet waiting list
+	 * 
+	 * @param <T>
+	 *            the generic type
+	 * @param cloudletWaitingList
+	 *            the cloudlet waiting list
 	 */
-	protected <T extends ResCloudlet> void cloudletWaitingList(List<T> cloudletWaitingList) {
+	protected <T extends ResCloudlet> void cloudletWaitingList(
+			List<T> cloudletWaitingList) {
 		this.cloudletWaitingList = cloudletWaitingList;
 	}
 
 	/**
 	 * Gets the cloudlet exec list.
-	 *
-	 * @param <T> the generic type
+	 * 
+	 * @param <T>
+	 *            the generic type
 	 * @return the cloudlet exec list
 	 */
 	@SuppressWarnings("unchecked")
@@ -784,18 +736,22 @@ public class CloudletHPCSpaceSharedO extends CloudletScheduler{
 
 	/**
 	 * Sets the cloudlet exec list.
-	 *
-	 * @param <T> the generic type
-	 * @param cloudletExecList the new cloudlet exec list
+	 * 
+	 * @param <T>
+	 *            the generic type
+	 * @param cloudletExecList
+	 *            the new cloudlet exec list
 	 */
-	protected <T extends ResCloudlet> void setCloudletExecList(List<T> cloudletExecList) {
+	protected <T extends ResCloudlet> void setCloudletExecList(
+			List<T> cloudletExecList) {
 		this.cloudletExecList = cloudletExecList;
 	}
 
 	/**
 	 * Gets the cloudlet paused list.
-	 *
-	 * @param <T> the generic type
+	 * 
+	 * @param <T>
+	 *            the generic type
 	 * @return the cloudlet paused list
 	 */
 	@SuppressWarnings("unchecked")
@@ -805,18 +761,22 @@ public class CloudletHPCSpaceSharedO extends CloudletScheduler{
 
 	/**
 	 * Sets the cloudlet paused list.
-	 *
-	 * @param <T> the generic type
-	 * @param cloudletPausedList the new cloudlet paused list
+	 * 
+	 * @param <T>
+	 *            the generic type
+	 * @param cloudletPausedList
+	 *            the new cloudlet paused list
 	 */
-	protected <T extends ResCloudlet> void setCloudletPausedList(List<T> cloudletPausedList) {
+	protected <T extends ResCloudlet> void setCloudletPausedList(
+			List<T> cloudletPausedList) {
 		this.cloudletPausedList = cloudletPausedList;
 	}
 
 	/**
 	 * Gets the cloudlet finished list.
-	 *
-	 * @param <T> the generic type
+	 * 
+	 * @param <T>
+	 *            the generic type
 	 * @return the cloudlet finished list
 	 */
 	@SuppressWarnings("unchecked")
@@ -826,15 +786,20 @@ public class CloudletHPCSpaceSharedO extends CloudletScheduler{
 
 	/**
 	 * Sets the cloudlet finished list.
-	 *
-	 * @param <T> the generic type
-	 * @param cloudletFinishedList the new cloudlet finished list
+	 * 
+	 * @param <T>
+	 *            the generic type
+	 * @param cloudletFinishedList
+	 *            the new cloudlet finished list
 	 */
-	protected <T extends ResCloudlet> void setCloudletFinishedList(List<T> cloudletFinishedList) {
+	protected <T extends ResCloudlet> void setCloudletFinishedList(
+			List<T> cloudletFinishedList) {
 		this.cloudletFinishedList = cloudletFinishedList;
 	}
 
-	/* (non-Javadoc)
+	/*
+	 * (non-Javadoc)
+	 * 
 	 * @see org.cloudbus.cloudsim.CloudletScheduler#getCurrentRequestedMips()
 	 */
 	@Override
@@ -848,11 +813,16 @@ public class CloudletHPCSpaceSharedO extends CloudletScheduler{
 		return mipsShare;
 	}
 
-	/* (non-Javadoc)
-	 * @see org.cloudbus.cloudsim.CloudletScheduler#getTotalCurrentAvailableMipsForCloudlet(org.cloudbus.cloudsim.ResCloudlet, java.util.List)
+	/*
+	 * (non-Javadoc)
+	 * 
+	 * @see org.cloudbus.cloudsim.CloudletScheduler#
+	 * getTotalCurrentAvailableMipsForCloudlet
+	 * (org.cloudbus.cloudsim.ResCloudlet, java.util.List)
 	 */
 	@Override
-	public double getTotalCurrentAvailableMipsForCloudlet(ResCloudlet rcl, List<Double> mipsShare) {
+	public double getTotalCurrentAvailableMipsForCloudlet(ResCloudlet rcl,
+			List<Double> mipsShare) {
 		double capacity = 0.0;
 		int cpus = 0;
 		for (Double mips : mipsShare) { // count the cpus available to the vmm
@@ -866,20 +836,30 @@ public class CloudletHPCSpaceSharedO extends CloudletScheduler{
 		return capacity;
 	}
 
-	/* (non-Javadoc)
-	 * @see org.cloudbus.cloudsim.CloudletScheduler#getTotalCurrentAllocatedMipsForCloudlet(org.cloudbus.cloudsim.ResCloudlet, double)
+	/*
+	 * (non-Javadoc)
+	 * 
+	 * @see org.cloudbus.cloudsim.CloudletScheduler#
+	 * getTotalCurrentAllocatedMipsForCloudlet
+	 * (org.cloudbus.cloudsim.ResCloudlet, double)
 	 */
 	@Override
-	public double getTotalCurrentAllocatedMipsForCloudlet(ResCloudlet rcl, double time) {
+	public double getTotalCurrentAllocatedMipsForCloudlet(ResCloudlet rcl,
+			double time) {
 		// TODO Auto-generated method stub
 		return 0.0;
 	}
 
-	/* (non-Javadoc)
-	 * @see org.cloudbus.cloudsim.CloudletScheduler#getTotalCurrentRequestedMipsForCloudlet(org.cloudbus.cloudsim.ResCloudlet, double)
+	/*
+	 * (non-Javadoc)
+	 * 
+	 * @see org.cloudbus.cloudsim.CloudletScheduler#
+	 * getTotalCurrentRequestedMipsForCloudlet
+	 * (org.cloudbus.cloudsim.ResCloudlet, double)
 	 */
 	@Override
-	public double getTotalCurrentRequestedMipsForCloudlet(ResCloudlet rcl, double time) {
+	public double getTotalCurrentRequestedMipsForCloudlet(ResCloudlet rcl,
+			double time) {
 		// TODO Auto-generated method stub
 		return 0.0;
 	}
@@ -897,4 +877,3 @@ public class CloudletHPCSpaceSharedO extends CloudletScheduler{
 	}
 
 }
-

modules/cloudsim/src/main/java/org/cloudbus/cloudsim/network/datacenter/Constants.java → modules/cloudsim/src/main/java/org/cloudbus/cloudsim/network/datacenter/NetworkConstants.java

@@ -4,25 +4,29 @@ import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 
-public class Constants {
+public class NetworkConstants {
 
-public static final int FFT = 0;
 
-public static int roundrobinRack=0;
 public static int maxhostVM=2;
 public static int HOST_PEs=8;
 
 public static double maxMemperVM=1024*1024;//kb
 
-public static final int BIN_NODE_TIME=10;
+
 
 public static int currentCloudletId=0;
 public static int currentAppId=0;
 
+
+//stage type
 public static final int EXECUTION=0;
 public static final int WAIT_SEND=1;
 public static final int WAIT_RECV=2;
 public static final int FINISH=-2;
+
+
+
+//number of switches at each level
 public static final int ROOT_LEVEL=0;
 public static final int Agg_LEVEL=1;
 public static final int EDGE_LEVEL=2;
@@ -30,17 +34,8 @@ public static final int EDGE_LEVEL=2;
 public static final int PES_NUMBER=4;
 public static final int FILE_SIZE=300;
 public static final int OUTPUT_SIZE=300;
-public static  int REQUESTS_PER_SECOND=200;
-public static final int COMMUNICATION_LENGTH=1;
-
-public static  int Requestspersecond = 2;
-public static  int REQUEST_CLASSES=10; 
-public static  double LOW_ACCURACY_RATE=0.2;
-public static  double MEDIUM_ACCURACY_RATE=.3;
-public static  double HIGH_ACCURACY_RATE=0.9;
-
-public static boolean schedulerOverlap=true;
 
+public static final int COMMUNICATION_LENGTH=1;
 
 public static  boolean BASE = true;
 
@@ -62,7 +57,7 @@ public static double RootSwitchPort=1;//number of Agg
 public static double seed=199;
 
 public static boolean logflag=false;
-public static Map<Integer,Map<Integer,Boolean>> Cache=new HashMap<Integer,Map<Integer,Boolean>>();
+
 
 public static int iteration=10;
 public static int nexttime=1000;

modules/cloudsim/src/main/java/org/cloudbus/cloudsim/network/datacenter/NetworkDatacenter.java

 package org.cloudbus.cloudsim.network.datacenter;
+
 /*
  * Title:        CloudSim Toolkit
  * Description:  CloudSim (Cloud Simulation) Toolkit for Modeling and Simulation of Clouds
@@ -7,8 +8,6 @@ package org.cloudbus.cloudsim.network.datacenter;
  * Copyright (c) 2009-2010, The University of Melbourne, Australia
  */
 
-
-
 import java.text.DecimalFormat;
 import java.util.ArrayList;
 import java.util.HashMap;
@@ -36,19 +35,53 @@ import org.cloudbus.cloudsim.core.SimEntity;
 import org.cloudbus.cloudsim.core.SimEvent;
 
 /**
- * Datacenter class is a CloudResource whose hostList
- * are virtualized. It deals with processing of VM queries (i.e., handling
- * of VMs) instead of processing Cloudlet-related queries. So, even though an
- * AllocPolicy will be instantiated (in the init() method of the superclass,
- * it will not be used, as processing of cloudlets are handled by the CloudletScheduler
- * and processing of VirtualMachines are handled by the VmAllocationPolicy.
- *
- * @author		Rodrigo N. Calheiros
- * @author		Anton Beloglazov
- * @since		CloudSim Toolkit 1.0
+ * NetworkDatacenter class is a Datacenter whose hostList are virtualized and
+ * networked. It contains all the information about internal network. For example,
+ * which VM is connected to Switch etc.  
+ * It deals with processing of VM queries (i.e., handling of VMs)
+ * instead of processing Cloudlet-related queries. So, even though an
+ * AllocPolicy will be instantiated (in the init() method of the superclass, it
+ * will not be used, as processing of cloudlets are handled by the
+ * CloudletScheduler and processing of VirtualMachines are handled by the
+ * VmAllocationPolicy.
+ * 
+ * Please refer to following publication for more details:
+ * 
+ * Saurabh Kumar Garg and Rajkumar Buyya, NetworkCloudSim: Modelling Parallel
+ * Applications in Cloud Simulations, Proceedings of the 4th IEEE/ACM
+ * International Conference on Utility and Cloud Computing (UCC 2011, IEEE CS
+ * Press, USA), Melbourne, Australia, December 5-7, 2011.
+ * 
+ * @author Saurabh Kumar Garg
+ * @since CloudSim Toolkit 3.0
  */
 public class NetworkDatacenter extends Datacenter {
 
+	
+	/**
+	 * Allocates a new NetworkDatacenter object.
+	 *
+	 * @param name       the name to be associated with this entity (as
+	 * required by Sim_entity class from simjava package)
+	 * @param characteristics   an object of DatacenterCharacteristics
+	 * @param storageList a LinkedList of storage elements, for data simulation
+	 * @param vmAllocationPolicy the vmAllocationPolicy
+	 *
+	 * @throws Exception This happens when one of the following scenarios occur:
+	 * <ul>
+	 * <li> creating this entity before initializing CloudSim package
+	 * <li> this entity name is <tt>null</tt> or empty
+	 * <li> this entity has <tt>zero</tt> number of PEs (Processing
+	 * Elements). <br>
+	 * No PEs mean the Cloudlets can't be processed.
+	 * A CloudResource must contain one or more Machines.
+	 * A Machine must contain one or more PEs.
+	 * </ul>
+	 *
+	 * @pre name != null
+	 * @pre resource != null
+	 * @post $none
+	 */
 	public NetworkDatacenter(String name,
 			DatacenterCharacteristics characteristics,
 			VmAllocationPolicy vmAllocationPolicy, List<Storage> storageList,
@@ -56,41 +89,50 @@ public class NetworkDatacenter extends Datacenter {
 		super(name, characteristics, vmAllocationPolicy, storageList,
 				schedulingInterval);
 		// TODO Auto-generated constructor stub
-		VmToSwitchid=new HashMap<Integer,Integer>();
-		HostToSwitchid=new HashMap<Integer,Integer>();
-		VmtoHostlist=new HashMap<Integer,Integer>();
-		Switchlist=new HashMap<Integer,Switch>();
+		VmToSwitchid = new HashMap<Integer, Integer>();
+		HostToSwitchid = new HashMap<Integer, Integer>();
+		VmtoHostlist = new HashMap<Integer, Integer>();
+		Switchlist = new HashMap<Integer, Switch>();
 	}
-    public Map<Integer,Integer> VmToSwitchid;
-    public Map<Integer,Integer> HostToSwitchid;
-    public Map<Integer,Switch> Switchlist;
-	
-    
-	public Map<Integer,Integer> VmtoHostlist;
-	
-	public Map<Integer, Switch> getEdgeSwitch(){
-		Map<Integer,Switch> edgeswitch=new HashMap<Integer,Switch>();
-	    for(Entry<Integer, Switch> es:Switchlist.entrySet()){
-	    	if(es.getValue().level==Constants.EDGE_LEVEL)
-	    	{
-	    		edgeswitch.put(es.getKey(), es.getValue());
-	    	}
-	    }
+
+	public Map<Integer, Integer> VmToSwitchid;
+	public Map<Integer, Integer> HostToSwitchid;
+	public Map<Integer, Switch> Switchlist;
+
+	public Map<Integer, Integer> VmtoHostlist;
+
+	/**
+	 * Get list of all EdgeSwitches in the Datacenter network
+	 * One can design similar functions for other type of switches.
+	 *  
+	 */
+	public Map<Integer, Switch> getEdgeSwitch() {
+		Map<Integer, Switch> edgeswitch = new HashMap<Integer, Switch>();
+		for (Entry<Integer, Switch> es : Switchlist.entrySet()) {
+			if (es.getValue().level == NetworkConstants.EDGE_LEVEL) {
+				edgeswitch.put(es.getKey(), es.getValue());
+			}
+		}
 		return edgeswitch;
-		
+
 	}
-	
-	
-	public boolean processVmCreateHPC(Vm vm) {
-    	
+	/**
+     * Create the VM within the NetworkDatacenter. 
+     * It can be directly accessed by Datacenter Broker 
+     * which manage allocation of Cloudlets.
+     *
+     * 
+     */
+	public boolean processVmCreateNetwork(Vm vm) {
 
- 	    boolean result = getVmAllocationPolicy().allocateHostForVm(vm);
- 	   
+		boolean result = getVmAllocationPolicy().allocateHostForVm(vm);
 
- 	    if (result) {
- 	 	   this.VmToSwitchid.put(vm.getId(), ((NetworkHost)vm.getHost()).sw.getId());
- 	 	   this.VmtoHostlist.put(vm.getId(),vm.getHost().getId());
- 	 	   System.out.println(vm.getId()+" VM is created on "+vm.getHost().getId());
+		if (result) {
+			this.VmToSwitchid.put(vm.getId(),
+					((NetworkHost) vm.getHost()).sw.getId());
+			this.VmtoHostlist.put(vm.getId(), vm.getHost().getId());
+			System.out.println(vm.getId() + " VM is created on "
+					+ vm.getHost().getId());
 			double amount = 0.0;
 			if (getDebts().containsKey(vm.getUserId())) {
 				amount = getDebts().get(vm.getUserId());
@@ -102,95 +144,116 @@ public class NetworkDatacenter extends Datacenter {
 
 			getVmList().add(vm);
 
-			vm.updateVmProcessing(CloudSim.clock(), getVmAllocationPolicy().getHost(vm).getVmScheduler().getAllocatedMipsForVm(vm));
- 	    }
- 	   return result;
-    }
-   
+			vm.updateVmProcessing(CloudSim.clock(), getVmAllocationPolicy()
+					.getHost(vm).getVmScheduler().getAllocatedMipsForVm(vm));
+		}
+		return result;
+	}
+    
+
+    /**
+     * Processes a Cloudlet submission.
+     *
+     * @param ev  a SimEvent object
+     * @param ack  an acknowledgement
+     *
+     * @pre ev != null
+     * @post $none
+     */
 	protected void processCloudletSubmit(SimEvent ev, boolean ack) {
-    	updateCloudletProcessing();
-
-        try {
-            // gets the Cloudlet object
-            Cloudlet cl = (Cloudlet) ev.getData();
-            
-
-            // checks whether this Cloudlet has finished or not
-            if (cl.isFinished()){
-                String name = CloudSim.getEntityName(cl.getUserId());
-                Log.printLine(getName()+": Warning - Cloudlet #"+cl.getCloudletId()+" owned by "+name+" is already completed/finished.");
-                Log.printLine("Therefore, it is not being executed again");
-                Log.printLine();
-
-                // NOTE: If a Cloudlet has finished, then it won't be processed.
-                // So, if ack is required, this method sends back a result.
-                // If ack is not required, this method don't send back a result.
-                // Hence, this might cause CloudSim to be hanged since waiting
-                // for this Cloudlet back.
-                if (ack) {
-                    int[] data = new int[3];
-                    data[0] = getId();
-                    data[1] = cl.getCloudletId();
-                    data[2] = CloudSimTags.FALSE;
-
-                    // unique tag = operation tag
-                    int tag = CloudSimTags.CLOUDLET_SUBMIT_ACK;
-                    sendNow(cl.getUserId(), tag, data);
-                }
-
-                sendNow(cl.getUserId(), CloudSimTags.CLOUDLET_RETURN, cl);
-
-                return;
-            }
-
-            // process this Cloudlet to this CloudResource
-            cl.setResourceParameter(getId(), getCharacteristics().getCostPerSecond(), getCharacteristics().getCostPerBw());
-
-            int userId = cl.getUserId();
-            int vmId = cl.getVmId();
-
-            double fileTransferTime = predictFileTransferTime(cl.getRequiredFiles()); //time to transfer the files
-
-            Host host = getVmAllocationPolicy().getHost(vmId, userId);
-            Vm vm = host.getVm(vmId, userId);
-            CloudletScheduler scheduler = vm.getCloudletScheduler();
-            //System.out.println("cloudlet recieved by VM"+vmId);
-            double estimatedFinishTime = scheduler.cloudletSubmit(cl,fileTransferTime);
-
-            //if (estimatedFinishTime > 0.0 && estimatedFinishTime < getSchedulingInterval()) { //if this cloudlet is in the exec queue
-            if (estimatedFinishTime > 0.0) { //if this cloudlet is in the exec queue
-            	//double estimatedFinishTime = (cl.getCloudletTotalLength()/(capacity*cl.getPesNumber())); //time to process the cloudlet
-            	//Log.printLine(estimatedFinishTime+"="+gl.getCloudletLength()+"/("+capacity+"*"+gl.getNumPE()+")");
-            	estimatedFinishTime += fileTransferTime;
-            	//estimatedFinishTime += CloudSim.clock();
-            	//Log.printLine(CloudSim.clock()+": Next event scheduled to +"+estimatedFinishTime);
-            	send(getId(), estimatedFinishTime, CloudSimTags.VM_DATACENTER_EVENT);
-            	
-            	//event to update the stages
-            	send(getId(), 0.0001, CloudSimTags.VM_DATACENTER_EVENT);
-            }
-            
-            if (ack) {
-                int[] data = new int[3];
-                data[0] = getId();
-                data[1] = cl.getCloudletId();
-                data[2] = CloudSimTags.TRUE;
-
-                // unique tag = operation tag
-                int tag = CloudSimTags.CLOUDLET_SUBMIT_ACK;
-                sendNow(cl.getUserId(), tag, data);
-            }
-        }
-        catch (ClassCastException c) {
-            Log.printLine(getName() + ".processCloudletSubmit(): " + "ClassCastException error.");
-            c.printStackTrace();
-        }
-        catch (Exception e) {
-            Log.printLine(getName() + ".processCloudletSubmit(): " + "Exception error.");
-            e.printStackTrace();
-        }
-
-    	checkCloudletCompletion();
-    }
+		updateCloudletProcessing();
+
+		try {
+			// gets the Cloudlet object
+			Cloudlet cl = (Cloudlet) ev.getData();
+
+			// checks whether this Cloudlet has finished or not
+			if (cl.isFinished()) {
+				String name = CloudSim.getEntityName(cl.getUserId());
+				Log.printLine(getName() + ": Warning - Cloudlet #"
+						+ cl.getCloudletId() + " owned by " + name
+						+ " is already completed/finished.");
+				Log.printLine("Therefore, it is not being executed again");
+				Log.printLine();
+
+				// NOTE: If a Cloudlet has finished, then it won't be processed.
+				// So, if ack is required, this method sends back a result.
+				// If ack is not required, this method don't send back a result.
+				// Hence, this might cause CloudSim to be hanged since waiting
+				// for this Cloudlet back.
+				if (ack) {
+					int[] data = new int[3];
+					data[0] = getId();
+					data[1] = cl.getCloudletId();
+					data[2] = CloudSimTags.FALSE;
+
+					// unique tag = operation tag
+					int tag = CloudSimTags.CLOUDLET_SUBMIT_ACK;
+					sendNow(cl.getUserId(), tag, data);
+				}
+
+				sendNow(cl.getUserId(), CloudSimTags.CLOUDLET_RETURN, cl);
+
+				return;
+			}
+
+			// process this Cloudlet to this CloudResource
+			cl.setResourceParameter(getId(), getCharacteristics()
+					.getCostPerSecond(), getCharacteristics().getCostPerBw());
+
+			int userId = cl.getUserId();
+			int vmId = cl.getVmId();
+
+			double fileTransferTime = predictFileTransferTime(cl
+					.getRequiredFiles()); // time to transfer the files
+
+			Host host = getVmAllocationPolicy().getHost(vmId, userId);
+			Vm vm = host.getVm(vmId, userId);
+			CloudletScheduler scheduler = vm.getCloudletScheduler();
+			// System.out.println("cloudlet recieved by VM"+vmId);
+			double estimatedFinishTime = scheduler.cloudletSubmit(cl,
+					fileTransferTime);
+
+			// if (estimatedFinishTime > 0.0 && estimatedFinishTime <
+			// getSchedulingInterval()) { //if this cloudlet is in the exec
+			// queue
+			if (estimatedFinishTime > 0.0) { // if this cloudlet is in the exec
+												// queue
+				// double estimatedFinishTime =
+				// (cl.getCloudletTotalLength()/(capacity*cl.getPesNumber()));
+				// //time to process the cloudlet
+				// Log.printLine(estimatedFinishTime+"="+gl.getCloudletLength()+"/("+capacity+"*"+gl.getNumPE()+")");
+				estimatedFinishTime += fileTransferTime;
+				// estimatedFinishTime += CloudSim.clock();
+				// Log.printLine(CloudSim.clock()+": Next event scheduled to +"+estimatedFinishTime);
+				send(getId(), estimatedFinishTime,
+						CloudSimTags.VM_DATACENTER_EVENT);
+
+				// event to update the stages
+				send(getId(), 0.0001, CloudSimTags.VM_DATACENTER_EVENT);
+			}
+
+			if (ack) {
+				int[] data = new int[3];
+				data[0] = getId();
+				data[1] = cl.getCloudletId();
+				data[2] = CloudSimTags.TRUE;
+
+				// unique tag = operation tag
+				int tag = CloudSimTags.CLOUDLET_SUBMIT_ACK;
+				sendNow(cl.getUserId(), tag, data);
+			}
+		} catch (ClassCastException c) {
+			Log.printLine(getName() + ".processCloudletSubmit(): "
+					+ "ClassCastException error.");
+			c.printStackTrace();
+		} catch (Exception e) {
+			Log.printLine(getName() + ".processCloudletSubmit(): "
+					+ "Exception error.");
+			e.printStackTrace();
+		}
+
+		checkCloudletCompletion();
+	}
 
 }

modules/cloudsim/src/main/java/org/cloudbus/cloudsim/network/datacenter/NetworkHost.java

@@ -27,169 +27,192 @@ import org.cloudbus.cloudsim.provisioners.BwProvisioner;
 import org.cloudbus.cloudsim.provisioners.RamProvisioner;
 
 /**
- * Host class extends a Machine to include other hostList beside PEs
- * to support simulation of virtualized grids. It executes actions related
- * to management of virtual machines (e.g., creation and destruction). A host has
- * a defined policy for provisioning memory and bw, as well as an allocation policy
- * for Pe's to virtual machines.
+ * NetworkHost class extends Host to support simulation of networked datacenters. 
+ * It executes actions related to management of packets (send and receive)other than that of 
+ * virtual machines (e.g., creation and destruction). A host has a defined
+ * policy for provisioning memory and bw, as well as an allocation policy for
+ * Pe's to virtual machines.
+ * 
+ * Please refer to following publication for more details:
+ * 
+ * Saurabh Kumar Garg and Rajkumar Buyya, NetworkCloudSim: Modelling Parallel
+ * Applications in Cloud Simulations, Proceedings of the 4th IEEE/ACM
+ * International Conference on Utility and Cloud Computing (UCC 2011, IEEE CS
+ * Press, USA), Melbourne, Australia, December 5-7, 2011.
  *
- * A host is associated to a datacenter. It can host virtual machines.
- *
- * @author		Rodrigo N. Calheiros
- * @author		Anton Beloglazov
- * @since		CloudSim Toolkit 1.0
+ * 
+ * @author Saurabh Kumar Garg
+ * @since CloudSim Toolkit 1.0
  */
 public class NetworkHost extends Host {
 
-	public List <HostPacket> packetTosendLocal;
-	public List <HostPacket> packetTosendGlobal;
-	public List <HostPacket> packetrecieved;
+	public List<NetworkPacket> packetTosendLocal;
+	public List<NetworkPacket> packetTosendGlobal;
+	public List<NetworkPacket> packetrecieved;
 	public double memory;
-	public Switch sw;
-	public double bandwidth;//latency
-	public List<Double> CPUfinTimeCPU=new ArrayList<Double>();//time when last job will finish on CPU1 
-	
-	public double fintime=0;
-	
+	public Switch sw; //Edge switch in general
+	public double bandwidth;// latency
+	public List<Double> CPUfinTimeCPU = new ArrayList<Double>();// time when
+																// last job will
+																// finish on
+																// CPU1
+
+	public double fintime = 0;
+
 	public NetworkHost(int id, RamProvisioner ramProvisioner,
 			BwProvisioner bwProvisioner, long storage,
 			List<? extends Pe> peList, VmScheduler vmScheduler) {
 		super(id, ramProvisioner, bwProvisioner, storage, peList, vmScheduler);
-		// TODO Auto-generated constructor stub
-		   this.packetrecieved=new ArrayList<HostPacket>();
-		   this.packetTosendGlobal=new ArrayList<HostPacket>();
-		   this.packetTosendLocal=new ArrayList<HostPacket>();
-	   
+		
+		this.packetrecieved = new ArrayList<NetworkPacket>();
+		this.packetTosendGlobal = new ArrayList<NetworkPacket>();
+		this.packetTosendLocal = new ArrayList<NetworkPacket>();
+
 	}
-	
-	
-    /**
-	 * Requests updating of processing of cloudlets in the VMs running in this host.
-	 *
-	 * @param currentTime the current time
-	 *
-	 * @return 		expected time of completion of the next cloudlet in all VMs in this host. Double.MAX_VALUE
-	 * if there is no future events expected in this host
-	 *
-	 * @pre 		currentTime >= 0.0
-	 * @post 		$none
+
+	/**
+	 * Requests updating of processing of cloudlets in the VMs running in this
+	 * host.
+	 * 
+	 * @param currentTime
+	 *            the current time
+	 * 
+	 * @return expected time of completion of the next cloudlet in all VMs in
+	 *         this host. Double.MAX_VALUE if there is no future events expected
+	 *         in th  is host
+	 * 
+	 * @pre currentTime >= 0.0
+	 * @post $none
 	 */
 	public double updateVmsProcessing(double currentTime) {
 		double smallerTime = Double.MAX_VALUE;
-        //insert in each vm packet recieved
+		// insert in each vm packet recieved
 		recvpackets();
 		for (Vm vm : super.getVmList()) {
-//			if (vm.isInMigration()) {
-//				continue;
-//			}
-			
-			double time = ((NetworkVm)vm).updateVmProcessing(currentTime, getVmScheduler().getAllocatedMipsForVm(vm));
+			// if (vm.isInMigration()) {
+			// continue;
+			// }
+
+			double time = ((NetworkVm) vm).updateVmProcessing(currentTime,
+					getVmScheduler().getAllocatedMipsForVm(vm));
 			if (time > 0.0 && time < smallerTime) {
 				smallerTime = time;
 			}
 		}
-        sendpackets();
-	
-		return smallerTime;
-		
-	}
+		//send the packets to other hosts/VMs
+		sendpackets();
 
+		return smallerTime;
 
+	}
+	/**
+	 * Receives packet and forward it to the corresponding VM for processing
+	 * host.
+	 * 
+	 * 
+	 */
 	private void recvpackets() {
-		// TODO Auto-generated method stub
-		for(HostPacket hs:packetrecieved)
-		{
-			//hs.stime=hs.rtime;
-			hs.pkt.recievetime=CloudSim.clock();
+		
+		for (NetworkPacket hs : packetrecieved) {
+			// hs.stime=hs.rtime;
+			hs.pkt.recievetime = CloudSim.clock();
+
+			// insertthe packet in recievedlist of VM
+			Vm vm = VmList.getById(getVmList(), hs.pkt.reciever);
+			List<HostPacket> pktlist = ((NetworkCloudletSpaceSharedScheduler) vm
+					.getCloudletScheduler()).pktrecv.get(hs.pkt.sender);
 			
-			//insertthe packet in recievedlist
-			Vm vm=VmList.getById(getVmList(), hs.pkt.reciever);
-		 	List<NetPacket> pktlist=((CloudletHPCSpaceShared)vm.getCloudletScheduler()).pktrecv.get(hs.pkt.sender);
-		    //List<NetPacket> pktlist=((CloudletHPCSpaceSharedO)vm.getCloudletScheduler()).pktrecv.get(hs.pkt.virtualsendid);
-			if(pktlist==null){
-				pktlist=new ArrayList<NetPacket>();
-				((CloudletHPCSpaceShared)vm.getCloudletScheduler()).pktrecv.put(hs.pkt.sender, pktlist);
-			// ((CloudletHPCSpaceSharedO)vm.getCloudletScheduler()).pktrecv.put(hs.pkt.virtualsendid, pktlist);
+			if (pktlist == null) {
+				pktlist = new ArrayList<HostPacket>();
+				((NetworkCloudletSpaceSharedScheduler) vm.getCloudletScheduler()).pktrecv
+						.put(hs.pkt.sender, pktlist);
+				
 			}
 			pktlist.add(hs.pkt);
-			
-			
+
 		}
 		packetrecieved.clear();
 	}
-
-
+	/**
+	 * Send packet check whether a packet belongs to a local VM or to a VM hosted on other machine.
+	 * 
+	 * 
+	 */
 	private void sendpackets() {
-		// TODO Auto-generated method stub
 		
-		for(Vm vm:super.getVmList())
-		{
-			for(Entry<Integer, List<NetPacket>> es:((CloudletHPCSpaceShared)vm.getCloudletScheduler()).pkttosend.entrySet())
-			//for(Entry<Integer, List<NetPacket>> es:((CloudletHPCSpaceSharedO)vm.getCloudletScheduler()).pkttosend.entrySet())
+
+		for (Vm vm : super.getVmList()) {
+			for (Entry<Integer, List<HostPacket>> es : ((NetworkCloudletSpaceSharedScheduler) vm
+					.getCloudletScheduler()).pkttosend.entrySet())
 			{
-				List<NetPacket> pktlist=es.getValue();
-			    for(NetPacket pkt:pktlist)
-			    {
-			    	HostPacket hpkt=new HostPacket(this.getId(),pkt,vm.getId(),pkt.sender);
-			    	Vm vm2=VmList.getById(this.getVmList(), hpkt.recievervmid);
-			    	if(vm2!=null) this.packetTosendLocal.add(hpkt);
-			    	else this.packetTosendGlobal.add(hpkt);
-			    }
-			    pktlist.clear();
-				
+				List<HostPacket> pktlist = es.getValue();
+				for (HostPacket pkt : pktlist) {
+					NetworkPacket hpkt = new NetworkPacket(this.getId(), pkt,
+							vm.getId(), pkt.sender);
+					Vm vm2 = VmList
+							.getById(this.getVmList(), hpkt.recievervmid);
+					if (vm2 != null)
+						this.packetTosendLocal.add(hpkt);
+					else
+						this.packetTosendGlobal.add(hpkt);
+				}
+				pktlist.clear();
+
 			}
-						
+
 		}
-		
-		boolean flag=false;
-		
-		for(HostPacket hs:packetTosendLocal)
-		{
-			flag=true;
-			hs.stime=hs.rtime;
-			hs.pkt.recievetime=CloudSim.clock();
-			//insertthe packet in recievedlist
-			Vm vm=VmList.getById(getVmList(), hs.pkt.reciever);
-			//Vm vm=getVmList().get(hs.pkt.reciever);
-			
-			List<NetPacket> pktlist=((CloudletHPCSpaceShared)vm.getCloudletScheduler()).pktrecv.get(hs.pkt.sender);
-			//List<NetPacket> pktlist=((CloudletHPCSpaceSharedO)vm.getCloudletScheduler()).pktrecv.get(hs.pkt.virtualsendid);
-			if(pktlist==null){
-				pktlist=new ArrayList<NetPacket>();
-					((CloudletHPCSpaceShared)vm.getCloudletScheduler()).pktrecv.put(hs.pkt.sender, pktlist);
-			//	((CloudletHPCSpaceSharedO)vm.getCloudletScheduler()).pktrecv.put(hs.pkt.virtualsendid, pktlist);
+
+		boolean flag = false;
+
+		for (NetworkPacket hs : packetTosendLocal) {
+			flag = true;
+			hs.stime = hs.rtime;
+			hs.pkt.recievetime = CloudSim.clock();
+			// insertthe packet in recievedlist
+			Vm vm = VmList.getById(getVmList(), hs.pkt.reciever);
+			// Vm vm=getVmList().get(hs.pkt.reciever);
+
+			List<HostPacket> pktlist = ((NetworkCloudletSpaceSharedScheduler) vm
+					.getCloudletScheduler()).pktrecv.get(hs.pkt.sender);
+			if (pktlist == null) {
+				pktlist = new ArrayList<HostPacket>();
+				((NetworkCloudletSpaceSharedScheduler) vm.getCloudletScheduler()).pktrecv
+						.put(hs.pkt.sender, pktlist);
 			}
 			pktlist.add(hs.pkt);
-			
-		}
-		if(flag){
-		for (Vm vm : super.getVmList()) {
-//			if (vm.isInMigration()) {
-//				continue;
-//			}
-			
-			double time = ((NetworkVm)vm).updateVmProcessing(CloudSim.clock(), getVmScheduler().getAllocatedMipsForVm(vm));
-			
+
 		}
+		if (flag) {
+			for (Vm vm : super.getVmList()) {
+				// if (vm.isInMigration()) {
+				// continue;
+				// }
+
+				double time = ((NetworkVm) vm).updateVmProcessing(CloudSim
+						.clock(), getVmScheduler().getAllocatedMipsForVm(vm));
+
+			}
 		}
+		
+		//Sending packet to other VMs therefore packet is forwarded to a Edge switch
+		
 		this.packetTosendLocal.clear();
-		double avband=this.bandwidth/packetTosendGlobal.size();
-		for(HostPacket hs:packetTosendGlobal)
-		{
-			double delay=(1000*hs.pkt.data)/avband;
-			Constants.totaldatatransfer+=hs.pkt.data;
-			//System.out.println(hs.pkt.virtualsendid+"  "+hs.pkt.virtualrecvid+" "+hs.pkt.data);
-			
-			CloudSim.send(this.getDatacenter().getId(), this.sw.getId(), delay, CloudSimTags.Network_Event_UP, hs);
-			//send to switch with delay
+		double avband = this.bandwidth / packetTosendGlobal.size();
+		for (NetworkPacket hs : packetTosendGlobal) {
+			double delay = (1000 * hs.pkt.data) / avband;
+			NetworkConstants.totaldatatransfer += hs.pkt.data;
+			// System.out.println(hs.pkt.virtualsendid+"  "+hs.pkt.virtualrecvid+" "+hs.pkt.data);
+
+			CloudSim.send(this.getDatacenter().getId(), this.sw.getId(), delay,
+					CloudSimTags.Network_Event_UP, hs);
+			// send to switch with delay
 		}
 		this.packetTosendGlobal.clear();
 	}
-   
-  
+
 	@SuppressWarnings("unchecked")
 	public double getMaxUtilizationAmongVmsPes(Vm vm) {
 		return PeList.getMaxUtilizationAmongVmsPes((List<Pe>) getPeList(), vm);
 	}
-	
+
 }

modules/cloudsim/src/main/java/org/cloudbus/cloudsim/network/datacenter/NetworkPacket.java

+package org.cloudbus.cloudsim.network.datacenter;
+
+/**
+ * NewtorkPacket represents the packet which travel from one server to another. 
+ * Each packet contains ids of the sender VM and receiver VM, 
+ * time at which it is send and received, type and virtual ids of tasks, which are communicating.
+ * 
+ * Please refer to following publication for more details:
+ * 
+ * Saurabh Kumar Garg and Rajkumar Buyya, NetworkCloudSim: Modelling Parallel
+ * Applications in Cloud Simulations, Proceedings of the 4th IEEE/ACM
+ * International Conference on Utility and Cloud Computing (UCC 2011, IEEE CS
+ * Press, USA), Melbourne, Australia, December 5-7, 2011.
+ *
+ * 
+ * @author Saurabh Kumar Garg
+ * @since CloudSim Toolkit 1.0
+ */
+
+public class NetworkPacket {
+	public NetworkPacket(int id, HostPacket pkt2, int vmid, int cloudletid) {
+		// TODO Auto-generated constructor stub
+		this.pkt = pkt2;
+		this.sendervmid = vmid;
+		this.cloudletid = cloudletid;
+		this.senderhostid = id;
+		this.stime = pkt.sendtime;
+		this.recievervmid = pkt2.reciever;
+
+	}
+
+	HostPacket pkt;
+	int senderhostid;
+	int recieverhostid;
+	int sendervmid;
+	int recievervmid;
+	int cloudletid;
+	double stime;// time when sent
+	double rtime;// time when received
+}

modules/cloudsim/src/main/java/org/cloudbus/cloudsim/network/datacenter/NetworkVm.java

@@ -6,29 +6,49 @@ import java.util.List;
 import org.cloudbus.cloudsim.CloudletScheduler;
 import org.cloudbus.cloudsim.Vm;
 
+/**
+ * NetworkVm class extends Vm to support simulation of networked datacenters. 
+ * It executes actions related to management of packets (send and receive).
+ * 
+ * Please refer to following publication for more details:
+ * 
+ * Saurabh Kumar Garg and Rajkumar Buyya, NetworkCloudSim: Modelling Parallel
+ * Applications in Cloud Simulations, Proceedings of the 4th IEEE/ACM
+ * International Conference on Utility and Cloud Computing (UCC 2011, IEEE CS
+ * Press, USA), Melbourne, Australia, December 5-7, 2011.
+ *
+ * 
+ * @author Saurabh Kumar Garg
+ * @since CloudSim Toolkit 1.0
+ */
 
-public class NetworkVm extends Vm implements Comparable{
+public class NetworkVm extends Vm implements Comparable {
 
 	public NetworkVm(int id, int userId, double mips, int pesNumber, int ram,
 			long bw, long size, String vmm, CloudletScheduler cloudletScheduler) {
-		super(id, userId, mips, pesNumber, ram, bw, size, vmm, cloudletScheduler);
+		super(id, userId, mips, pesNumber, ram, bw, size, vmm,
+				cloudletScheduler);
 		// TODO Auto-generated constructor stub
-		cloudletlist=new ArrayList<NetworkCloudlet>();
+		cloudletlist = new ArrayList<NetworkCloudlet>();
 	}
+
 	public ArrayList<NetworkCloudlet> cloudletlist;
-    int type;
-	public ArrayList<NetPacket> recvPktlist;
+	int type;
+	public ArrayList<HostPacket> recvPktlist;
 	public double memory;
-	public boolean flagfree;//if true it is free
+	public boolean flagfree;// if true it is free
 	public double finishtime;
-	public boolean isFree()
-	{
+
+	public boolean isFree() {
 		return flagfree;
 	}
+
 	public int compareTo(Object arg0) {
-		NetworkVm hs=(NetworkVm)arg0;
-		if(hs.finishtime>this.finishtime) return -1;
-		if(hs.finishtime<this.finishtime) return 1;
+		NetworkVm hs = (NetworkVm) arg0;
+		if (hs.finishtime > this.finishtime)
+			return -1;
+		if (hs.finishtime < this.finishtime)
+			return 1;
 		return 0;
 	}
 }

modules/cloudsim/src/main/java/org/cloudbus/cloudsim/network/datacenter/VmHPCAllocationPolicySimple.java → modules/cloudsim/src/main/java/org/cloudbus/cloudsim/network/datacenter/NetworkVmAllocationPolicy.java

@@ -21,15 +21,16 @@ import org.cloudbus.cloudsim.core.CloudSim;
 import org.cloudbus.cloudsim.power.PowerHost;
 
 /**
- * VmAllocationPolicySimple is an VmAllocationPolicy that
+ * NetworkVmAllocationPolicy is an VmAllocationPolicy that
  * chooses, as the host for a VM, the host with
  * less PEs in use.
  *
  * @author		Rodrigo N. Calheiros
  * @author		Anton Beloglazov
+ * @author      Saurabh Kumar Garg
  * @since		CloudSim Toolkit 1.0
  */
-public class VmHPCAllocationPolicySimple extends VmAllocationPolicy {
+public class NetworkVmAllocationPolicy extends VmAllocationPolicy {
 
 	/** The vm table. */
 	private Map<String, Host> vmTable;
@@ -48,7 +49,7 @@ public class VmHPCAllocationPolicySimple extends VmAllocationPolicy {
 	 * @pre $none
 	 * @post $none
 	 */
-	public VmHPCAllocationPolicySimple(List<? extends Host> list) {
+	public NetworkVmAllocationPolicy(List<? extends Host> list) {
 		super(list);
 
 		setFreePes(new ArrayList<Integer>());
@@ -74,34 +75,51 @@ public class VmHPCAllocationPolicySimple extends VmAllocationPolicy {
 	@Override
 
 		public boolean allocateHostForVm(Vm vm) {
-			NetworkHost allocatedHost = findHostForVm(vm);
-			if (allocatedHost != null && allocatedHost.vmCreate(vm)) { //if vm has been succesfully created in the host
-				getVmTable().put(vm.getUid(), allocatedHost);
-				if (!Log.isDisabled()) {
-					Log.print(String.format("%.2f: VM #" + vm.getId() + " has been allocated to the host #" + allocatedHost.getId() + "\n", CloudSim.clock()));
-				}
-				return true;
+				
+			int requiredPes = vm.getPesNumber();
+			boolean result = false;
+			int tries = 0;
+			List<Integer> freePesTmp = new ArrayList<Integer>();
+			for (Integer freePes : getFreePes()) {
+				freePesTmp.add(freePes);
 			}
-			return false;
-		}
-
 
-	public NetworkHost findHostForVm(Vm vm) {
-		double minPower = Double.MAX_VALUE;
-		NetworkHost allocatedHost = null;
+			if (!getVmTable().containsKey(vm.getUid())) { //if this vm was not created
+				do {//we still trying until we find a host or until we try all of them
+					int moreFree = Integer.MIN_VALUE;
+					int idx = -1;
+
+					//we want the host with less pes in use
+					for (int i=0; i < freePesTmp.size(); i++) {
+						if (freePesTmp.get(i) > moreFree) {
+							moreFree = freePesTmp.get(i);
+							idx = i;
+						}
+					}
+
+					NetworkHost host =this.<NetworkHost>getHostList().get(idx);
+					result = host.vmCreate(vm);
+
+					if (result) { //if vm were succesfully created in the host
+						//Log.printLine("VmAllocationPolicy: VM #"+vm.getVmId()+ "Chosen host: #"+host.getMachineID()+" idx:"+idx);
+						getVmTable().put(vm.getUid(), host);
+						getUsedPes().put(vm.getUid(), requiredPes);
+						getFreePes().set(idx, getFreePes().get(idx) - requiredPes);
+						result = true;
+						break;
+					} else {
+						freePesTmp.set(idx, Integer.MIN_VALUE);
+					}
+					tries++;
+				} while (!result && tries < getFreePes().size());
 
-		for (NetworkHost host : this.<NetworkHost>getHostList()) {
-			if (host.isSuitableForVm(vm)) {
-				double maxUtilization = getMaxUtilizationAfterAllocation(host, vm);
-				if ((!vm.isRecentlyCreated() && maxUtilization > 1) || (vm.isRecentlyCreated() && maxUtilization > 1.0)) {
-					continue;
-				}
-				allocatedHost = host;
 			}
+
+			return result;
 		}
+         
 
-		return allocatedHost;
-	}
+	
 	protected double getMaxUtilizationAfterAllocation(NetworkHost host, Vm vm) {
 		List<Double> allocatedMipsForVm = null;
 		NetworkHost allocatedHost = (NetworkHost) vm.getHost();
@@ -248,6 +266,12 @@ public class VmHPCAllocationPolicySimple extends VmAllocationPolicy {
 	public boolean allocateHostForVm(Vm vm, Host host) {
 		if (host.vmCreate(vm)) { //if vm has been succesfully created in the host
 			getVmTable().put(vm.getUid(), host);
+			
+			 int requiredPes = vm.getPesNumber();
+		     int idx = getHostList().indexOf(host);
+		     getUsedPes().put(vm.getUid(), requiredPes);
+		     getFreePes().set(idx, getFreePes().get(idx) - requiredPes);
+			
 			Log.formatLine("%.2f: VM #" + vm.getId() + " has been allocated to the host #" + host.getId(), CloudSim.clock());
 			return true;
 		}

modules/cloudsim/src/main/java/org/cloudbus/cloudsim/network/datacenter/RootSwitch.java

@@ -9,60 +9,92 @@ import org.cloudbus.cloudsim.core.CloudSimTags;
 import org.cloudbus.cloudsim.core.SimEvent;
 import org.cloudbus.cloudsim.core.predicates.PredicateType;
 
-public class RootSwitch extends Switch{
+/**
+ * This class allows to simulate Root switch which connects Datacenter to
+ * external network. It interacts with other switches in order to exchange
+ * packets. Please refer to following publication for more details:
+ * 
+ * Saurabh Kumar Garg and Rajkumar Buyya, NetworkCloudSim: Modelling Parallel
+ * Applications in Cloud Simulations, Proceedings of the 4th IEEE/ACM
+ * International Conference on Utility and Cloud Computing (UCC 2011, IEEE CS
+ * Press, USA), Melbourne, Australia, December 5-7, 2011.
+ * 
+ * @author Saurabh Kumar Garg
+ * @since CloudSim Toolkit 3.0
+ * 
+ */
 
+public class RootSwitch extends Switch {
+
+	/**
+	 * Constructor for Root Switch We have to specify switches that are
+	 * connected to its downlink ports, and corresponding bandwidths
+	 * 
+	 * @param name
+	 *            Name of the switch
+	 * @param level
+	 *            At which level switch is with respect to hosts.
+	 * @param dc
+	 *            Pointer to Datacenter
+	 */
 	public RootSwitch(String name, int level, NetworkDatacenter dc) {
 		super(name, level, dc);
-		downlinkswitchpktlist=new HashMap<Integer,List<HostPacket>>();
-		downlinkswitches=new ArrayList<Switch>();
-		
-		downlinkbandwidth=Constants.BandWidthAggRoot;
-		latency=Constants.SwitchingDelayRoot;
-		numport=Constants.RootSwitchPort;
-		
+		downlinkswitchpktlist = new HashMap<Integer, List<NetworkPacket>>();
+		downlinkswitches = new ArrayList<Switch>();
+
+		downlinkbandwidth = NetworkConstants.BandWidthAggRoot;
+		latency = NetworkConstants.SwitchingDelayRoot;
+		numport = NetworkConstants.RootSwitchPort;
+
 		// TODO Auto-generated constructor stub
 	}
-	
-	  	
-	private void processpacket_up(SimEvent ev) {
-		// TODO Auto-generated method stub
-		//packet coming from down level router.
-		//has to send up
-		//check which switch to forward to 
-		//add packet in the switch list
+
+	/**
+	 * Send Packet to switch connected through a downlink port
+	 * 
+	 * @param ev
+	 *            Event/packet to process
+	 */
+	@Override
+	protected void processpacket_up(SimEvent ev) {
+
+		// packet coming from down level router.
+		// has to send up
+		// check which switch to forward to
+		// add packet in the switch list
 		//
-		//int src=ev.getSource();
-		HostPacket hspkt=(HostPacket) ev.getData();
-	    int recvVMid=hspkt.pkt.reciever;
-	    CloudSim.cancelAll(getId(), new PredicateType(CloudSimTags.Network_Event_send));
-		schedule(getId(),this.switching_delay, CloudSimTags.Network_Event_send);
-	    
-	    if(this.level==Constants.ROOT_LEVEL)
-	    {
-	    	//get id of edge router
-	    	int edgeswitchid=dc.VmToSwitchid.get(recvVMid);
-	    	//search which aggregate switch has it
-	    	int aggSwtichid=-1;;
-	    	for(Switch sw:this.downlinkswitches)
-	    	{
-        	    for(Switch edge:sw.downlinkswitches)
-        	    {
-        	    	if(edge.getId()==edgeswitchid){
-        	    		aggSwtichid=sw.getId();
-        	    		break;
-        	    	}
-        	    }
-	    	}
-	    	if(aggSwtichid<0) System.out.println(" No destination for this packet");
-	    	else{
-		    	List<HostPacket> pktlist=this.downlinkswitchpktlist.get(aggSwtichid);
-		    	if(pktlist==null){
-		    		pktlist=new ArrayList<HostPacket>();
-		    		this.downlinkswitchpktlist.put(aggSwtichid, pktlist);
-		    	}
-		    	pktlist.add(hspkt);
-	    	}
-	    }
-	}
+		
+		NetworkPacket hspkt = (NetworkPacket) ev.getData();
+		int recvVMid = hspkt.pkt.reciever;
+		CloudSim.cancelAll(getId(), new PredicateType(
+				CloudSimTags.Network_Event_send));
+		schedule(getId(), this.switching_delay, CloudSimTags.Network_Event_send);
 
+		if (this.level == NetworkConstants.ROOT_LEVEL) {
+			// get id of edge router
+			int edgeswitchid = dc.VmToSwitchid.get(recvVMid);
+			// search which aggregate switch has it
+			int aggSwtichid = -1;
+			;
+			for (Switch sw : this.downlinkswitches) {
+				for (Switch edge : sw.downlinkswitches) {
+					if (edge.getId() == edgeswitchid) {
+						aggSwtichid = sw.getId();
+						break;
+					}
+				}
+			}
+			if (aggSwtichid < 0)
+				System.out.println(" No destination for this packet");
+			else {
+				List<NetworkPacket> pktlist = this.downlinkswitchpktlist
+						.get(aggSwtichid);
+				if (pktlist == null) {
+					pktlist = new ArrayList<NetworkPacket>();
+					this.downlinkswitchpktlist.put(aggSwtichid, pktlist);
+				}
+				pktlist.add(hspkt);
+			}
+		}
+	}
 }

modules/cloudsim/src/main/java/org/cloudbus/cloudsim/network/datacenter/Switch.java

@@ -21,484 +21,402 @@ import org.cloudbus.cloudsim.core.SimEvent;
 import org.cloudbus.cloudsim.core.predicates.PredicateType;
 import org.cloudbus.cloudsim.lists.VmList;
 
-public class Switch extends SimEntity{
+public class Switch extends SimEntity {
 
-	
-	//switch level
+	// switch level
 	public int id;
-	public int level;//three levels
+	public int level;// three levels
 	public int datacenterid;
-	public Map<Integer,List<HostPacket>> uplinkswitchpktlist;
-	public Map<Integer,List<HostPacket>> downlinkswitchpktlist;
-	public Map<Integer,NetworkHost> hostlist;
-    public List<Switch>uplinkswitches;
-    public List <Switch>downlinkswitches;
-	public Map<Integer,List<HostPacket>> packetTohost;
-	int type;//edge switch or aggregation switch
+	public Map<Integer, List<NetworkPacket>> uplinkswitchpktlist;
+	public Map<Integer, List<NetworkPacket>> downlinkswitchpktlist;
+	public Map<Integer, NetworkHost> hostlist;
+	public List<Switch> uplinkswitches;
+	public List<Switch> downlinkswitches;
+	public Map<Integer, List<NetworkPacket>> packetTohost;
+	int type;// edge switch or aggregation switch
 	public double uplinkbandwidth;
 	public double downlinkbandwidth;
 	public double latency;
 	public double numport;
 	public NetworkDatacenter dc;
-	
-	public SortedMap<Double,List<NetworkHost>> fintimelistHost=new TreeMap<Double,List<NetworkHost>>();//something is running on these hosts
-	public SortedMap<Double,List<NetworkVm>> fintimelistVM=new TreeMap<Double,List<NetworkVm>>();//something is running on these hosts
-	public ArrayList<HostPacket> pktlist;
-	public List<Vm> BagofTaskVm=new ArrayList<Vm>();
-	
+
+	public SortedMap<Double, List<NetworkHost>> fintimelistHost = new TreeMap<Double, List<NetworkHost>>();// something
+																											// is
+																											// running
+																											// on
+																											// these
+																											// hosts
+	public SortedMap<Double, List<NetworkVm>> fintimelistVM = new TreeMap<Double, List<NetworkVm>>();// something
+																										// is
+																										// running
+																										// on
+																										// these
+																										// hosts
+	public ArrayList<NetworkPacket> pktlist;
+	public List<Vm> BagofTaskVm = new ArrayList<Vm>();
+
 	public double switching_delay;
-	public Map<Integer,NetworkVm> Vmlist;
-	public Switch(String name,int level,NetworkDatacenter dc) {
+	public Map<Integer, NetworkVm> Vmlist;
+
+	public Switch(String name, int level, NetworkDatacenter dc) {
 		super(name);
-		this.level=level;
-		
-	/*	if(level==Constants.EDGE_LEVEL)
-		{
-			hostlist=new HashMap<Integer,HPCHost>();
-			uplinkswitchpktlist=new HashMap<Integer,List<HostPacket>>();
-			packetTohost=new HashMap<Integer,List<HostPacket>>();
-	        uplinkbandwidth=Constants.BandWidthEdgeAgg;
-			downlinkbandwidth=Constants.BandWidthEdgeHost;
-			latency=Constants.SwitchingDelayEdge;
-			numport=Constants.EdgeSwitchPort;
-			uplinkswitches=new ArrayList<Switch>();
-			
-		}
-		if(level==Constants.Agg_LEVEL)
-		{
-			downlinkswitchpktlist=new HashMap<Integer,List<HostPacket>>();
-			uplinkswitchpktlist=new HashMap<Integer,List<HostPacket>>();
-			  uplinkbandwidth=Constants.BandWidthAggRoot;
-				downlinkbandwidth=Constants.BandWidthEdgeAgg;
-				latency=Constants.SwitchingDelayAgg;
-				numport=Constants.AggSwitchPort;
-				uplinkswitches=new ArrayList<Switch>();
-				downlinkswitches=new ArrayList<Switch>();
-		}
-		if(level==Constants.ROOT_LEVEL)
-		{
-			downlinkswitchpktlist=new HashMap<Integer,List<HostPacket>>();
-			downlinkswitches=new ArrayList<Switch>();
-			
-			downlinkbandwidth=Constants.BandWidthAggRoot;
-			latency=Constants.SwitchingDelayRoot;
-			numport=Constants.RootSwitchPort;
-			
-		}*/
-		this.dc=dc;
+		this.level = level;
+
+		/*
+		 * if(level==Constants.EDGE_LEVEL) { hostlist=new
+		 * HashMap<Integer,HPCHost>(); uplinkswitchpktlist=new
+		 * HashMap<Integer,List<HostPacket>>(); packetTohost=new
+		 * HashMap<Integer,List<HostPacket>>();
+		 * uplinkbandwidth=Constants.BandWidthEdgeAgg;
+		 * downlinkbandwidth=Constants.BandWidthEdgeHost;
+		 * latency=Constants.SwitchingDelayEdge;
+		 * numport=Constants.EdgeSwitchPort; uplinkswitches=new
+		 * ArrayList<Switch>();
+		 * 
+		 * } if(level==Constants.Agg_LEVEL) { downlinkswitchpktlist=new
+		 * HashMap<Integer,List<HostPacket>>(); uplinkswitchpktlist=new
+		 * HashMap<Integer,List<HostPacket>>();
+		 * uplinkbandwidth=Constants.BandWidthAggRoot;
+		 * downlinkbandwidth=Constants.BandWidthEdgeAgg;
+		 * latency=Constants.SwitchingDelayAgg; numport=Constants.AggSwitchPort;
+		 * uplinkswitches=new ArrayList<Switch>(); downlinkswitches=new
+		 * ArrayList<Switch>(); } if(level==Constants.ROOT_LEVEL) {
+		 * downlinkswitchpktlist=new HashMap<Integer,List<HostPacket>>();
+		 * downlinkswitches=new ArrayList<Switch>();
+		 * 
+		 * downlinkbandwidth=Constants.BandWidthAggRoot;
+		 * latency=Constants.SwitchingDelayRoot;
+		 * numport=Constants.RootSwitchPort;
+		 * 
+		 * }
+		 */
+		this.dc = dc;
 		// TODO Auto-generated constructor stub
 	}
 
-
 	@Override
 	public void startEntity() {
 		Log.printLine(getName() + " is starting...");
 		schedule(getId(), 0, CloudSimTags.RESOURCE_CHARACTERISTICS_REQUEST);
 	}
 
-
 	@Override
 	public void processEvent(SimEvent ev) {
-		//Log.printLine(CloudSim.clock()+"[Broker]: event received:"+ev.getTag());
-		switch (ev.getTag()){
-			// Resource characteristics request
-			case CloudSimTags.Network_Event_UP:
-				//process the packet from down switch or host
-				processpacket_up(ev);
-				break;
-			case CloudSimTags.Network_Event_DOWN:
-				//process the packet from uplink
-				processpacket_down(ev);
-				break;
-			case CloudSimTags.Network_Event_send:
-				processpacketforward(ev);
-				break;
-			
-			case CloudSimTags.Network_Event_Host:
-				processhostpacket(ev);
-				break;
-			// Resource characteristics answer
-	        case CloudSimTags.RESOURCE_Register:
-	        	registerHost(ev);
-	            break;
-            // other unknown tags are processed by this method
-	        default:
-	            processOtherEvent(ev);
-	            break;
+		// Log.printLine(CloudSim.clock()+"[Broker]: event received:"+ev.getTag());
+		switch (ev.getTag()) {
+		// Resource characteristics request
+		case CloudSimTags.Network_Event_UP:
+			// process the packet from down switch or host
+			processpacket_up(ev);
+			break;
+		case CloudSimTags.Network_Event_DOWN:
+			// process the packet from uplink
+			processpacket_down(ev);
+			break;
+		case CloudSimTags.Network_Event_send:
+			processpacketforward(ev);
+			break;
+
+		case CloudSimTags.Network_Event_Host:
+			processhostpacket(ev);
+			break;
+		// Resource characteristics answer
+		case CloudSimTags.RESOURCE_Register:
+			registerHost(ev);
+			break;
+		// other unknown tags are processed by this method
+		default:
+			processOtherEvent(ev);
+			break;
 		}
 	}
- 
-	private void processhostpacket(SimEvent ev) {
+
+	protected void processhostpacket(SimEvent ev) {
 		// TODO Auto-generated method stub
-		//Send packet to host
-		HostPacket hspkt=(HostPacket) ev.getData();
-		NetworkHost hs=this.hostlist.get(hspkt.recieverhostid);
+		// Send packet to host
+		NetworkPacket hspkt = (NetworkPacket) ev.getData();
+		NetworkHost hs = this.hostlist.get(hspkt.recieverhostid);
 		hs.packetrecieved.add(hspkt);
 	}
 
-
-
-		private void processpacket_down(SimEvent ev) {
+	protected void processpacket_down(SimEvent ev) {
 		// TODO Auto-generated method stub
-		//packet coming from up level router.
-		//has to send downward
-		//check which switch to forward to 
-		//add packet in the switch list
-		//add packet in the host list
-		//int src=ev.getSource();
-		HostPacket hspkt=(HostPacket) ev.getData();
-	    int recvVMid=hspkt.pkt.reciever;
-		CloudSim.cancelAll(getId(), new PredicateType(CloudSimTags.Network_Event_send));
-		schedule(getId(),this.latency, CloudSimTags.Network_Event_send);
-	    if(this.level==Constants.EDGE_LEVEL)
-	    {
-	    	// packet is to be recieved by host
-	    	int hostid=dc.VmtoHostlist.get(recvVMid);
-	    	hspkt.recieverhostid=hostid;
-	    	List<HostPacket> pktlist=this.packetTohost.get(hostid);
-	    	if(pktlist==null){
-	    		pktlist=new ArrayList<HostPacket>();
-	    		this.packetTohost.put(hostid, pktlist);
-	    	}
-	    	pktlist.add(hspkt);
-	    	return;
-	    }
-	    if(this.level==Constants.Agg_LEVEL)
-	    {
-	    	//packet is coming from root so need to be sent to edgelevel swich
-	    	//find the id for edgelevel switch
-	    	int switchid=dc.VmToSwitchid.get(recvVMid);
-	    	List<HostPacket> pktlist=this.downlinkswitchpktlist.get(switchid);
-	    	if(pktlist==null){
-	    		pktlist=new ArrayList<HostPacket>();
-	    		this.downlinkswitchpktlist.put(switchid, pktlist);
-	    	}
-	    	pktlist.add(hspkt);
-	    	return;
-	    }
-	  	
-	}
+		// packet coming from up level router.
+		// has to send downward
+		// check which switch to forward to
+		// add packet in the switch list
+		// add packet in the host list
+		// int src=ev.getSource();
+		NetworkPacket hspkt = (NetworkPacket) ev.getData();
+		int recvVMid = hspkt.pkt.reciever;
+		CloudSim.cancelAll(getId(), new PredicateType(
+				CloudSimTags.Network_Event_send));
+		schedule(getId(), this.latency, CloudSimTags.Network_Event_send);
+		if (this.level == NetworkConstants.EDGE_LEVEL) {
+			// packet is to be recieved by host
+			int hostid = dc.VmtoHostlist.get(recvVMid);
+			hspkt.recieverhostid = hostid;
+			List<NetworkPacket> pktlist = this.packetTohost.get(hostid);
+			if (pktlist == null) {
+				pktlist = new ArrayList<NetworkPacket>();
+				this.packetTohost.put(hostid, pktlist);
+			}
+			pktlist.add(hspkt);
+			return;
+		}
+		if (this.level == NetworkConstants.Agg_LEVEL) {
+			// packet is coming from root so need to be sent to edgelevel swich
+			// find the id for edgelevel switch
+			int switchid = dc.VmToSwitchid.get(recvVMid);
+			List<NetworkPacket> pktlist = this.downlinkswitchpktlist.get(switchid);
+			if (pktlist == null) {
+				pktlist = new ArrayList<NetworkPacket>();
+				this.downlinkswitchpktlist.put(switchid, pktlist);
+			}
+			pktlist.add(hspkt);
+			return;
+		}
 
+	}
 
-	private void processpacket_up(SimEvent ev) {
+	protected void processpacket_up(SimEvent ev) {
 		// TODO Auto-generated method stub
-		//packet coming from down level router.
-		//has to send up
-		//check which switch to forward to 
-		//add packet in the switch list
+		// packet coming from down level router.
+		// has to send up
+		// check which switch to forward to
+		// add packet in the switch list
 		//
-		//int src=ev.getSource();
-		HostPacket hspkt=(HostPacket) ev.getData();
-	    int recvVMid=hspkt.pkt.reciever;
-	    CloudSim.cancelAll(getId(), new PredicateType(CloudSimTags.Network_Event_send));
-		schedule(getId(),this.switching_delay, CloudSimTags.Network_Event_send);
-	    if(this.level==Constants.EDGE_LEVEL)
-	    {
-	    	// packet is recieved from host
-	    	//packet is to be sent to aggregate level or to another host in the same level
-	    	
-	    	int hostid=dc.VmtoHostlist.get(recvVMid);
-	    	NetworkHost hs=this.hostlist.get(hostid);
-	    	hspkt.recieverhostid=hostid;
-	    	if(hs!=null)
-	    	{
-	    		//packet to be sent to host connected to the switch
-	    		List<HostPacket> pktlist=this.packetTohost.get(hostid);
-		    	if(pktlist==null){
-		    		pktlist=new ArrayList<HostPacket>();
-		    		this.packetTohost.put(hostid, pktlist);
-		    	}
-		    	pktlist.add(hspkt);
-		    	return;
-	    		
-	    	}
-	    	//packet is to be sent to upper switch
-	    	//ASSUMPTION EACH EDGE is Connected to one aggregate level switch
-	             	
-	    	Switch sw=this.uplinkswitches.get(0);
-	    	List<HostPacket> pktlist=this.uplinkswitchpktlist.get(sw.getId());
-	    	if(pktlist==null){
-	    		pktlist=new ArrayList<HostPacket>();
-	    		this.uplinkswitchpktlist.put(sw.getId(), pktlist);
-	    	}
-	    	pktlist.add(hspkt);
-	    	return;
-	    }
-	    if(this.level==Constants.Agg_LEVEL)
-	    {
-	    	//packet is coming from edge level router so need to be sent to either root or another edge level swich
-	    	//find the id for edgelevel switch
-	    	int switchid=dc.VmToSwitchid.get(recvVMid);
-	    	boolean flagtoswtich=false;
-	    	for(Switch sw:this.downlinkswitches)
-	    	{
-        	   if(switchid==sw.getId()) flagtoswtich=true; 
-	    	}
-	    	if(flagtoswtich)
-	    	{
-		    	List<HostPacket> pktlist=this.downlinkswitchpktlist.get(switchid);
-		    	if(pktlist==null){
-		    		pktlist=new ArrayList<HostPacket>();
-		    		this.downlinkswitchpktlist.put(switchid, pktlist);
-		    	}
-		    	pktlist.add(hspkt);
-	    	}
-	    	else//send to up
-	    	{
-	    		Switch sw=this.uplinkswitches.get(0);
-		    	List<HostPacket> pktlist=this.uplinkswitchpktlist.get(sw.getId());
-		    	if(pktlist==null){
-		    		pktlist=new ArrayList<HostPacket>();
-		    		this.uplinkswitchpktlist.put(sw.getId(), pktlist);
-		    	}
-		    	pktlist.add(hspkt);
-	    	}
-	    }
-	    if(this.level==Constants.ROOT_LEVEL)
-	    {
-	    	//get id of edge router
-	    	int edgeswitchid=dc.VmToSwitchid.get(recvVMid);
-	    	//search which aggregate switch has it
-	    	int aggSwtichid=-1;;
-	    	for(Switch sw:this.downlinkswitches)
-	    	{
-        	    for(Switch edge:sw.downlinkswitches)
-        	    {
-        	    	if(edge.getId()==edgeswitchid){
-        	    		aggSwtichid=sw.getId();
-        	    		break;
-        	    	}
-        	    }
-	    	}
-	    	if(aggSwtichid<0) System.out.println(" No destination for this packet");
-	    	else{
-		    	List<HostPacket> pktlist=this.downlinkswitchpktlist.get(aggSwtichid);
-		    	if(pktlist==null){
-		    		pktlist=new ArrayList<HostPacket>();
-		    		this.downlinkswitchpktlist.put(aggSwtichid, pktlist);
-		    	}
-		    	pktlist.add(hspkt);
-	    	}
-	    }
-	}
+		// int src=ev.getSource();
+		NetworkPacket hspkt = (NetworkPacket) ev.getData();
+		int recvVMid = hspkt.pkt.reciever;
+		CloudSim.cancelAll(getId(), new PredicateType(
+				CloudSimTags.Network_Event_send));
+		schedule(getId(), this.switching_delay, CloudSimTags.Network_Event_send);
+		if (this.level == NetworkConstants.EDGE_LEVEL) {
+			// packet is recieved from host
+			// packet is to be sent to aggregate level or to another host in the
+			// same level
+
+			int hostid = dc.VmtoHostlist.get(recvVMid);
+			NetworkHost hs = this.hostlist.get(hostid);
+			hspkt.recieverhostid = hostid;
+			if (hs != null) {
+				// packet to be sent to host connected to the switch
+				List<NetworkPacket> pktlist = this.packetTohost.get(hostid);
+				if (pktlist == null) {
+					pktlist = new ArrayList<NetworkPacket>();
+					this.packetTohost.put(hostid, pktlist);
+				}
+				pktlist.add(hspkt);
+				return;
+
+			}
+			// packet is to be sent to upper switch
+			// ASSUMPTION EACH EDGE is Connected to one aggregate level switch
 
+			Switch sw = this.uplinkswitches.get(0);
+			List<NetworkPacket> pktlist = this.uplinkswitchpktlist.get(sw.getId());
+			if (pktlist == null) {
+				pktlist = new ArrayList<NetworkPacket>();
+				this.uplinkswitchpktlist.put(sw.getId(), pktlist);
+			}
+			pktlist.add(hspkt);
+			return;
+		}
+		if (this.level == NetworkConstants.Agg_LEVEL) {
+			// packet is coming from edge level router so need to be sent to
+			// either root or another edge level swich
+			// find the id for edgelevel switch
+			int switchid = dc.VmToSwitchid.get(recvVMid);
+			boolean flagtoswtich = false;
+			for (Switch sw : this.downlinkswitches) {
+				if (switchid == sw.getId())
+					flagtoswtich = true;
+			}
+			if (flagtoswtich) {
+				List<NetworkPacket> pktlist = this.downlinkswitchpktlist
+						.get(switchid);
+				if (pktlist == null) {
+					pktlist = new ArrayList<NetworkPacket>();
+					this.downlinkswitchpktlist.put(switchid, pktlist);
+				}
+				pktlist.add(hspkt);
+			} else// send to up
+			{
+				Switch sw = this.uplinkswitches.get(0);
+				List<NetworkPacket> pktlist = this.uplinkswitchpktlist.get(sw
+						.getId());
+				if (pktlist == null) {
+					pktlist = new ArrayList<NetworkPacket>();
+					this.uplinkswitchpktlist.put(sw.getId(), pktlist);
+				}
+				pktlist.add(hspkt);
+			}
+		}
+		if (this.level == NetworkConstants.ROOT_LEVEL) {
+			// get id of edge router
+			int edgeswitchid = dc.VmToSwitchid.get(recvVMid);
+			// search which aggregate switch has it
+			int aggSwtichid = -1;
+			;
+			for (Switch sw : this.downlinkswitches) {
+				for (Switch edge : sw.downlinkswitches) {
+					if (edge.getId() == edgeswitchid) {
+						aggSwtichid = sw.getId();
+						break;
+					}
+				}
+			}
+			if (aggSwtichid < 0)
+				System.out.println(" No destination for this packet");
+			else {
+				List<NetworkPacket> pktlist = this.downlinkswitchpktlist
+						.get(aggSwtichid);
+				if (pktlist == null) {
+					pktlist = new ArrayList<NetworkPacket>();
+					this.downlinkswitchpktlist.put(aggSwtichid, pktlist);
+				}
+				pktlist.add(hspkt);
+			}
+		}
+	}
 
 	private void registerHost(SimEvent ev) {
 		// TODO Auto-generated method stub
-		NetworkHost hs=(NetworkHost)ev.getData();
-		hostlist.put(hs.getId(),(NetworkHost)ev.getData());
+		NetworkHost hs = (NetworkHost) ev.getData();
+		hostlist.put(hs.getId(), (NetworkHost) ev.getData());
 	}
 
-
-	private void processpacket(SimEvent ev) {
+	protected void processpacket(SimEvent ev) {
 		// TODO Auto-generated method stub
-		//send packet to itself with switching delay (discarding other)
-		CloudSim.cancelAll(getId(), new PredicateType(CloudSimTags.Network_Event_UP));
-		schedule(getId(),this.switching_delay, CloudSimTags.Network_Event_UP);
-		pktlist.add((HostPacket)ev.getData());
-		
-		//add the packet in the list
-		
-	}
+		// send packet to itself with switching delay (discarding other)
+		CloudSim.cancelAll(getId(), new PredicateType(
+				CloudSimTags.Network_Event_UP));
+		schedule(getId(), this.switching_delay, CloudSimTags.Network_Event_UP);
+		pktlist.add((NetworkPacket) ev.getData());
+
+		// add the packet in the list
 
+	}
 
 	private void processOtherEvent(SimEvent ev) {
 		// TODO Auto-generated method stub
-		
+
 	}
 
-	private void processpacketforward(SimEvent ev) {
+	protected void processpacketforward(SimEvent ev) {
 		// TODO Auto-generated method stub
-		//search for the host and packets..send to them
-		
-		if(this.downlinkswitchpktlist!=null)
-		{
-			for(Entry<Integer, List<HostPacket>> es:downlinkswitchpktlist.entrySet())
-			{
-				int tosend=es.getKey();
-				List<HostPacket> hspktlist=es.getValue();
-				if(!hspktlist.isEmpty()){
-					double avband=this.downlinkbandwidth/hspktlist.size();
-					Iterator<HostPacket> it=hspktlist.iterator();
-					while(it.hasNext()){
-						HostPacket hspkt=it.next();
-						double delay=1000*hspkt.pkt.data/avband;
-						
-						this.send(tosend,delay,CloudSimTags.Network_Event_DOWN, hspkt);
+		// search for the host and packets..send to them
+
+		if (this.downlinkswitchpktlist != null) {
+			for (Entry<Integer, List<NetworkPacket>> es : downlinkswitchpktlist
+					.entrySet()) {
+				int tosend = es.getKey();
+				List<NetworkPacket> hspktlist = es.getValue();
+				if (!hspktlist.isEmpty()) {
+					double avband = this.downlinkbandwidth / hspktlist.size();
+					Iterator<NetworkPacket> it = hspktlist.iterator();
+					while (it.hasNext()) {
+						NetworkPacket hspkt = it.next();
+						double delay = 1000 * hspkt.pkt.data / avband;
+
+						this.send(tosend, delay,
+								CloudSimTags.Network_Event_DOWN, hspkt);
 					}
 					hspktlist.clear();
 				}
 			}
 		}
-		if(this.uplinkswitchpktlist!=null)
-		{
-			for(Entry<Integer, List<HostPacket>> es:uplinkswitchpktlist.entrySet())
-			{
-				int tosend=es.getKey();
-				List<HostPacket> hspktlist=es.getValue();
-				if(!hspktlist.isEmpty()){
-					double avband=this.uplinkbandwidth/hspktlist.size();
-					Iterator<HostPacket> it=hspktlist.iterator();
-					while(it.hasNext())
-					{
-						HostPacket hspkt=it.next();
-						double delay=1000*hspkt.pkt.data/avband;
-						
-						this.send(tosend,delay,CloudSimTags.Network_Event_UP, hspkt);
+		if (this.uplinkswitchpktlist != null) {
+			for (Entry<Integer, List<NetworkPacket>> es : uplinkswitchpktlist
+					.entrySet()) {
+				int tosend = es.getKey();
+				List<NetworkPacket> hspktlist = es.getValue();
+				if (!hspktlist.isEmpty()) {
+					double avband = this.uplinkbandwidth / hspktlist.size();
+					Iterator<NetworkPacket> it = hspktlist.iterator();
+					while (it.hasNext()) {
+						NetworkPacket hspkt = it.next();
+						double delay = 1000 * hspkt.pkt.data / avband;
+
+						this.send(tosend, delay, CloudSimTags.Network_Event_UP,
+								hspkt);
 					}
 					hspktlist.clear();
 				}
 			}
 		}
-		if(this.packetTohost!=null)
-		{
-			for(Entry<Integer, List<HostPacket>> es:packetTohost.entrySet())
-			{
-				int tosend=es.getKey();
-				NetworkHost hs=this.hostlist.get(tosend);
-				List<HostPacket> hspktlist=es.getValue();
-				if(!hspktlist.isEmpty()){
-					double avband=this.downlinkbandwidth/hspktlist.size();
-					Iterator<HostPacket> it=hspktlist.iterator();
-					while(it.hasNext()){
-						HostPacket hspkt=it.next();
-						//hspkt.recieverhostid=tosend;
-						//hs.packetrecieved.add(hspkt);
-						this.send(this.getId(),hspkt.pkt.data/avband,CloudSimTags.Network_Event_Host, hspkt);
+		if (this.packetTohost != null) {
+			for (Entry<Integer, List<NetworkPacket>> es : packetTohost.entrySet()) {
+				int tosend = es.getKey();
+				NetworkHost hs = this.hostlist.get(tosend);
+				List<NetworkPacket> hspktlist = es.getValue();
+				if (!hspktlist.isEmpty()) {
+					double avband = this.downlinkbandwidth / hspktlist.size();
+					Iterator<NetworkPacket> it = hspktlist.iterator();
+					while (it.hasNext()) {
+						NetworkPacket hspkt = it.next();
+						// hspkt.recieverhostid=tosend;
+						// hs.packetrecieved.add(hspkt);
+						this.send(this.getId(), hspkt.pkt.data / avband,
+								CloudSimTags.Network_Event_Host, hspkt);
 					}
 					hspktlist.clear();
 				}
-			}		
+			}
 		}
-		
-		
-		//or to switch at next level.
-		//clear the list
-		
-	}
 
+		// or to switch at next level.
+		// clear the list
+
+	}
 
 	private NetworkHost getHostwithVM(int vmid) {
 		// TODO Auto-generated method stub
-		for(Entry<Integer, NetworkHost> es:this.hostlist.entrySet())
-		{
-			Vm vm=VmList.getById(es.getValue().getVmList(),vmid);
-		    if(vm!=null) return es.getValue();
+		for (Entry<Integer, NetworkHost> es : this.hostlist.entrySet()) {
+			Vm vm = VmList.getById(es.getValue().getVmList(), vmid);
+			if (vm != null)
+				return es.getValue();
 		}
 		return null;
 	}
 
-	public List<NetworkHost> gethostsWithAvailability(int numHostReq,
-			double deadline, double exeTime) {
-		// TODO Auto-generated method stub
-		List<NetworkHost> ls=null;
-	
-		for(Entry<Double,List<NetworkHost>> es:this.fintimelistHost.entrySet()){
-			if((es.getKey()+exeTime)>=deadline){
-				ls= null;
-			    break;}
-			else{
-					if(es.getValue().size()>=numHostReq)
-					{
-						ls= es.getValue();
-						break;
-					}
-			}
-		}
-//		if(ls==null)
-//		{
-//			List<HPCHost> freehostlist=getfreehostlist(numHostReq);
-//			if(freehostlist.size()>=numHostReq) ls=freehostlist;
-//		}
-		return ls;
-	}
-	public List<NetworkVm> getVmsWithAvailability(int numVMReq,
-			double deadline, double exeTime) {
-		// TODO Auto-generated method stub
-		List<NetworkVm> ls=new ArrayList<NetworkVm>();
-		
 	
-//		SortedMap<Double,HPCVm> vmlst=getfintimelistVM();
-		int i =0;
-     	for(Entry<Integer,NetworkHost> es:this.hostlist.entrySet()){
-     		
-     		for(Vm vm:es.getValue().getVmList())
-     		{
-     			NetworkVm v=(NetworkVm)vm;
-     			if((v.finishtime+exeTime)<deadline)
-     			{
-     				ls.add(v);
-     				i++;
-     			}
-     			if(i>=numVMReq) break;
-     		}
-     		if(i>=numVMReq) break;
-     	}
-     		
-     		//			if((es.getKey()+exeTime)>=deadline){
-//				ls= null;
-//			    break;}
-//			else{
-//					if(es.getValue().size()>=numVMReq)
-//					{
-//						ls= es.getValue();
-//						break;
-//					}
-//			}
-//		}
-//		if(ls==null)
-//		{
-//			List<HPCVm> freeVMlist=getfreeVmlist(numVMReq);
-//			if(freeVMlist.size()>=numVMReq) ls=freeVMlist;
-//		}
-		return ls;
-	}
-//	private SortedMap<Double, HPCVm> getfintimelistVM() {
-//		// TODO Auto-generated method stub
-//		SortedMap<Double,HPCVm> getfintimelis
-//		return null;
-//	}
 
+	
 
 	private List<NetworkVm> getfreeVmlist(int numVMReq) {
 		// TODO Auto-generated method stub
-		List<NetworkVm> freehostls=new ArrayList<NetworkVm>();
-		for(Entry<Integer,NetworkVm> et:this.Vmlist.entrySet())
-		{
-			if(et.getValue().isFree())
-			{
+		List<NetworkVm> freehostls = new ArrayList<NetworkVm>();
+		for (Entry<Integer, NetworkVm> et : this.Vmlist.entrySet()) {
+			if (et.getValue().isFree()) {
 				freehostls.add(et.getValue());
 			}
-			if(freehostls.size()==numVMReq)
+			if (freehostls.size() == numVMReq)
 				break;
 		}
-		
+
 		return freehostls;
 	}
 
-
 	private List<NetworkHost> getfreehostlist(int numhost) {
 		// TODO Auto-generated method stub
-		List<NetworkHost> freehostls=new ArrayList<NetworkHost>();
-		for(Entry<Integer,NetworkHost> et:this.hostlist.entrySet())
-		{
-			if(et.getValue().getFreePesNumber()==et.getValue().getPesNumber())
-			{
+		List<NetworkHost> freehostls = new ArrayList<NetworkHost>();
+		for (Entry<Integer, NetworkHost> et : this.hostlist.entrySet()) {
+			if (et.getValue().getFreePesNumber() == et.getValue()
+					.getPesNumber()) {
 				freehostls.add(et.getValue());
 			}
-			if(freehostls.size()==numhost)
+			if (freehostls.size() == numhost)
 				break;
 		}
-		
+
 		return freehostls;
 	}
-    
 
 	@Override
 	public void shutdownEntity() {
-        Log.printLine(getName() + " is shutting down...");
+		Log.printLine(getName() + " is shutting down...");
 	}
 
-	
-	
 }

modules/cloudsim/src/main/java/org/cloudbus/cloudsim/network/datacenter/TaskStage.java

 package org.cloudbus.cloudsim.network.datacenter;
 
+/**
+ * Taskstage represents various stages a networkCloudlet can have during execution. 
+ * Four stage types which are possible-> EXECUTION=0; WAIT_SEND=1; WAIT_RECV=2; FINISH=-2; 
+ * Check NeworkConstants.java file for that. 
+ * 
+ * Please refer to following publication for more details:
+ * 
+ * Saurabh Kumar Garg and Rajkumar Buyya, NetworkCloudSim: Modelling Parallel
+ * Applications in Cloud Simulations, Proceedings of the 4th IEEE/ACM
+ * International Conference on Utility and Cloud Computing (UCC 2011, IEEE CS
+ * Press, USA), Melbourne, Australia, December 5-7, 2011.
+ *
+ * 
+ * @author Saurabh Kumar Garg
+ * @since CloudSim Toolkit 1.0
+ */
+
 public class TaskStage {
-	public TaskStage(int type, double data, double time, double stageid,long memory,
-			int peer,int vpeer) {
+	public TaskStage(int type, double data, double time, double stageid,
+			long memory, int peer, int vpeer) {
 		super();
 		this.type = type;
 		this.data = data;
@@ -10,14 +27,15 @@ public class TaskStage {
 		this.stageid = stageid;
 		this.memory = memory;
 		this.peer = peer;
-		this.vpeer=vpeer;
+		this.vpeer = vpeer;
 	}
+
 	int vpeer;
-	int type;//execution, recv, send,
-	double data;//data generated or send or recv
-	double time;//execution time for this stage
+	int type;// execution, recv, send,
+	double data;// data generated or send or recv
+	double time;// execution time for this stage
 	double stageid;
 	long memory;
-	int peer;//from whom data needed to be recieved or send
-	
+	int peer;// from whom data needed to be recieved or send
+
 }

modules/cloudsim/src/main/java/org/cloudbus/cloudsim/network/datacenter/WorkflowApp.java

 package org.cloudbus.cloudsim.network.datacenter;
 
+/**
+ * WorkflowApp is an example of AppCloudlet having three communicating tasks. 
+ * Task A and B sends the data (packet) while Task C receives them
+ * 
+ * Please refer to following publication for more details:
+ * 
+ * Saurabh Kumar Garg and Rajkumar Buyya, NetworkCloudSim: Modelling Parallel
+ * Applications in Cloud Simulations, Proceedings of the 4th IEEE/ACM
+ * International Conference on Utility and Cloud Computing (UCC 2011, IEEE CS
+ * Press, USA), Melbourne, Australia, December 5-7, 2011.
+ *
+ * 
+ * @author Saurabh Kumar Garg
+ * @since CloudSim Toolkit 1.0
+ */
+
 import java.util.List;
 
 import org.cloudbus.cloudsim.UtilizationModel;
@@ -16,30 +32,30 @@ public class WorkflowApp extends AppCloudlet{
 		this.numbervm=3;
 	}
 	public void createCloudletList(List<Integer> vmIdList){
-		long fileSize = Constants.FILE_SIZE;
-		long outputSize = Constants.OUTPUT_SIZE;
-		int pesNumber = Constants.PES_NUMBER;
+		long fileSize = NetworkConstants.FILE_SIZE;
+		long outputSize = NetworkConstants.OUTPUT_SIZE;
+		int pesNumber = NetworkConstants.PES_NUMBER;
 		int memory=100;
 		UtilizationModel utilizationModel = new UtilizationModelFull();
 		int i=0;
 		//Task A
-		NetworkCloudlet cl = new NetworkCloudlet(Constants.currentCloudletId, 0, 1, fileSize, outputSize, memory, utilizationModel, utilizationModel, utilizationModel);
+		NetworkCloudlet cl = new NetworkCloudlet(NetworkConstants.currentCloudletId, 0, 1, fileSize, outputSize, memory, utilizationModel, utilizationModel, utilizationModel);
 	    cl.numStage=2;
-	    Constants.currentCloudletId++;
+	    NetworkConstants.currentCloudletId++;
   		cl.setUserId(userId);
   		cl.submittime=CloudSim.clock();
   		cl.currStagenum=-1;
   		cl.setVmId(vmIdList.get(i));
   		
   		//first stage: big computation
-  		cl.stages.add(new TaskStage(Constants.EXECUTION, 0, 1000*0.8, 0, memory, vmIdList.get(0),cl.getCloudletId()));
-  		cl.stages.add(new TaskStage(Constants.WAIT_SEND, 1000, 0, 1, memory, vmIdList.get(2),cl.getCloudletId()+2));
+  		cl.stages.add(new TaskStage(NetworkConstants.EXECUTION, 0, 1000*0.8, 0, memory, vmIdList.get(0),cl.getCloudletId()));
+  		cl.stages.add(new TaskStage(NetworkConstants.WAIT_SEND, 1000, 0, 1, memory, vmIdList.get(2),cl.getCloudletId()+2));
   		clist.add(cl);
   		i++;
   		//Task B
-  		NetworkCloudlet clb = new NetworkCloudlet(Constants.currentCloudletId, 0, 1, fileSize, outputSize, memory, utilizationModel, utilizationModel, utilizationModel);
+  		NetworkCloudlet clb = new NetworkCloudlet(NetworkConstants.currentCloudletId, 0, 1, fileSize, outputSize, memory, utilizationModel, utilizationModel, utilizationModel);
 	    clb.numStage=2;
-	    Constants.currentCloudletId++;
+	    NetworkConstants.currentCloudletId++;
   		clb.setUserId(userId);
   		clb.submittime=CloudSim.clock();
   		clb.currStagenum=-1;
@@ -47,24 +63,24 @@ public class WorkflowApp extends AppCloudlet{
   	
   		//first stage: big computation
   		
-  		clb.stages.add(new TaskStage(Constants.EXECUTION, 0, 1000*0.8, 0, memory, vmIdList.get(1),clb.getCloudletId()));
-  		clb.stages.add(new TaskStage(Constants.WAIT_SEND, 1000, 0, 1, memory, vmIdList.get(2),clb.getCloudletId()+1));
+  		clb.stages.add(new TaskStage(NetworkConstants.EXECUTION, 0, 1000*0.8, 0, memory, vmIdList.get(1),clb.getCloudletId()));
+  		clb.stages.add(new TaskStage(NetworkConstants.WAIT_SEND, 1000, 0, 1, memory, vmIdList.get(2),clb.getCloudletId()+1));
   		clist.add(clb);
   		i++;
   		
   		//Task C
-  		NetworkCloudlet clc = new NetworkCloudlet(Constants.currentCloudletId, 0, 1, fileSize, outputSize, memory, utilizationModel, utilizationModel, utilizationModel);
+  		NetworkCloudlet clc = new NetworkCloudlet(NetworkConstants.currentCloudletId, 0, 1, fileSize, outputSize, memory, utilizationModel, utilizationModel, utilizationModel);
 	    clc.numStage=2;
-	    Constants.currentCloudletId++;
+	    NetworkConstants.currentCloudletId++;
   		clc.setUserId(userId);
   		clc.submittime=CloudSim.clock();
   		clc.currStagenum=-1;
   		clc.setVmId(vmIdList.get(i));
   	
   		//first stage: big computation
-  		clc.stages.add(new TaskStage(Constants.WAIT_RECV, 1000, 0, 0, memory, vmIdList.get(0),cl.getCloudletId()));
-  		clc.stages.add(new TaskStage(Constants.WAIT_RECV, 1000, 0, 1, memory, vmIdList.get(1),cl.getCloudletId()+1));
-  		clc.stages.add(new TaskStage(Constants.EXECUTION, 0, 1000*0.8, 1, memory, vmIdList.get(0),clc.getCloudletId()));
+  		clc.stages.add(new TaskStage(NetworkConstants.WAIT_RECV, 1000, 0, 0, memory, vmIdList.get(0),cl.getCloudletId()));
+  		clc.stages.add(new TaskStage(NetworkConstants.WAIT_RECV, 1000, 0, 1, memory, vmIdList.get(1),cl.getCloudletId()+1));
+  		clc.stages.add(new TaskStage(NetworkConstants.EXECUTION, 0, 1000*0.8, 1, memory, vmIdList.get(0),clc.getCloudletId()));
   		
   		clist.add(clc);
   			

modules/cloudsim/src/main/java/org/cloudbus/cloudsim/network/datacenter/testMainclass.java

@@ -33,275 +33,301 @@ public class testMainclass {
 	 * @param args
 	 */
 
+	/** The cloudlet list. */
+	private static List<AppCloudlet> cloudletList;
 
-		/** The cloudlet list. */
-		private static List<AppCloudlet> cloudletList;
-
-		/** The vmlist. */
-		private static List<NetworkVm> vmlist;
-
-		/**
-		 * Creates main() to run this example.
-		 *
-		 * @param args the args
-		 */
-		public static void main(String[] args) {
-
-			Log.printLine("Starting CloudSimExample1...");
-			
-			try {
-				int num_user = 1; // number of cloud users
-				Calendar calendar = Calendar.getInstance();
-				boolean trace_flag = false; // mean trace events
-
-				// Initialize the CloudSim library
-				CloudSim.init(num_user, calendar, trace_flag);
-
-				// Second step: Create Datacenters
-				// Datacenters are the resource providers in CloudSim. We need at
-				// list one of them to run a CloudSim simulation
-				NetworkDatacenter datacenter0 = createDatacenter("Datacenter_0");
-
-				// Third step: Create Broker
-				NetDatacenterBroker broker = createBroker();
-				int brokerId = broker.getId();
-                broker.setLinkDC(datacenter0);
-				//broker.setLinkDC(datacenter0);
-				// Fifth step: Create one Cloudlet
-				cloudletList = new ArrayList<AppCloudlet>();
-				  
-				vmlist = new ArrayList<NetworkVm>();
-				
-				// submit vm list to the broker
-				
-				
-				broker.submitVmList(vmlist);
-
-				// Sixth step: Starts the simulation
-				CloudSim.startSimulation();
-
-				CloudSim.stopSimulation();
-
-				//Final step: Print results when simulation is over
-				List<Cloudlet> newList = broker.getCloudletReceivedList();
-				printCloudletList(newList);
-				System.out.println("numberofcloudlet "+newList.size()+" Cached "+NetDatacenterBroker.cachedcloudlet+" Data transfered "+Constants.totaldatatransfer);
-				// Print the debt of each user to each datacenter
-				datacenter0.printDebts();
-				
-				Log.printLine("CloudSimExample1 finished!");
-			} catch (Exception e) {
-				e.printStackTrace();
-				Log.printLine("Unwanted errors happen");
-			}
+	/** The vmlist. */
+	private static List<NetworkVm> vmlist;
+
+	/**
+	 * Creates main() to run this example.
+	 * 
+	 * @param args
+	 *            the args
+	 */
+	public static void main(String[] args) {
+
+		Log.printLine("Starting CloudSimExample1...");
+
+		try {
+			int num_user = 1; // number of cloud users
+			Calendar calendar = Calendar.getInstance();
+			boolean trace_flag = false; // mean trace events
+
+			// Initialize the CloudSim library
+			CloudSim.init(num_user, calendar, trace_flag);
+
+			// Second step: Create Datacenters
+			// Datacenters are the resource providers in CloudSim. We need at
+			// list one of them to run a CloudSim simulation
+			NetworkDatacenter datacenter0 = createDatacenter("Datacenter_0");
+
+			// Third step: Create Broker
+			NetDatacenterBroker broker = createBroker();
+			int brokerId = broker.getId();
+			broker.setLinkDC(datacenter0);
+			// broker.setLinkDC(datacenter0);
+			// Fifth step: Create one Cloudlet
+			cloudletList = new ArrayList<AppCloudlet>();
+
+			vmlist = new ArrayList<NetworkVm>();
+
+			// submit vm list to the broker
+
+			broker.submitVmList(vmlist);
+
+			// Sixth step: Starts the simulation
+			CloudSim.startSimulation();
+
+			CloudSim.stopSimulation();
+
+			// Final step: Print results when simulation is over
+			List<Cloudlet> newList = broker.getCloudletReceivedList();
+			printCloudletList(newList);
+			System.out.println("numberofcloudlet " + newList.size()
+					+ " Cached " + NetDatacenterBroker.cachedcloudlet
+					+ " Data transfered " + NetworkConstants.totaldatatransfer);
+			// Print the debt of each user to each datacenter
+			datacenter0.printDebts();
+
+			Log.printLine("CloudSimExample1 finished!");
+		} catch (Exception e) {
+			e.printStackTrace();
+			Log.printLine("Unwanted errors happen");
 		}
+	}
+
+	/**
+	 * Creates the datacenter.
+	 * 
+	 * @param name
+	 *            the name
+	 * 
+	 * @return the datacenter
+	 */
+	private static NetworkDatacenter createDatacenter(String name) {
 
-		/**
-		 * Creates the datacenter.
-		 *
-		 * @param name the name
-		 *
-		 * @return the datacenter
-		 */
-		private static NetworkDatacenter createDatacenter(String name) {
-
-			// Here are the steps needed to create a PowerDatacenter:
-			// 1. We need to create a list to store
-			// our machine
-			
-			
-			List<NetworkHost> hostList = new ArrayList<NetworkHost>();
+		// Here are the steps needed to create a PowerDatacenter:
+		// 1. We need to create a list to store
+		// our machine
 
+		List<NetworkHost> hostList = new ArrayList<NetworkHost>();
+
+		// 2. A Machine contains one or more PEs or CPUs/Cores.
+		// In this example, it will have only one core.
+		// List<Pe> peList = new ArrayList<Pe>();
+
+		int mips = 1;
+
+		// 3. Create PEs and add these into a list.
+		// peList.add(new Pe(0, new PeProvisionerSimple(mips))); // need to
+		// store Pe id and MIPS Rating
+
+		// 4. Create Host with its id and list of PEs and add them to the list
+		// of machines
+		int hostId = 0;
+		int ram = 2048; // host memory (MB)
+		long storage = 1000000; // host storage
+		int bw = 10000;
+		for (int i = 0; i < NetworkConstants.EdgeSwitchPort
+				* NetworkConstants.AggSwitchPort
+				* NetworkConstants.RootSwitchPort; i++) {
 			// 2. A Machine contains one or more PEs or CPUs/Cores.
 			// In this example, it will have only one core.
-			//List<Pe> peList = new ArrayList<Pe>();
-
-			int mips = 1;
-
-			// 3. Create PEs and add these into a list.
-			//peList.add(new Pe(0, new PeProvisionerSimple(mips))); // need to store Pe id and MIPS Rating
-
-			// 4. Create Host with its id and list of PEs and add them to the list
-			// of machines
-			int hostId = 0;
-			int ram = 2048; // host memory (MB)
-			long storage = 1000000; // host storage
-			int bw = 10000;
-			for (int i = 0; i < Constants.EdgeSwitchPort*Constants.AggSwitchPort*Constants.RootSwitchPort; i++) {
-				// 2. A Machine contains one or more PEs or CPUs/Cores.
-				// In this example, it will have only one core.
-				// 3. Create PEs and add these into an object of PowerPeList.
-				List<Pe> peList = new ArrayList<Pe>();
-				peList.add(new Pe(0, new PeProvisionerSimple(mips))); // need to store PowerPe id and MIPS Rating
-				peList.add(new Pe(1, new PeProvisionerSimple(mips))); // need to store PowerPe id and MIPS Rating
-				peList.add(new Pe(2, new PeProvisionerSimple(mips))); // need to store PowerPe id and MIPS Rating
-				peList.add(new Pe(3, new PeProvisionerSimple(mips))); // need to store PowerPe id and MIPS Rating
-				peList.add(new Pe(4, new PeProvisionerSimple(mips))); // need to store PowerPe id and MIPS Rating
-				peList.add(new Pe(5, new PeProvisionerSimple(mips))); // need to store PowerPe id and MIPS Rating
-				peList.add(new Pe(6, new PeProvisionerSimple(mips))); // need to store PowerPe id and MIPS Rating
-				peList.add(new Pe(7, new PeProvisionerSimple(mips))); // need to store PowerPe id and MIPS Rating
-				
-				
-				
-				
-				// 4. Create PowerHost with its id and list of PEs and add them to the list of machines
-				hostList.add(
-					new NetworkHost(
-						i,
-						new RamProvisionerSimple(ram),
-						new BwProvisionerSimple(bw),
-						storage,
-						peList,
-						new VmSchedulerTimeShared(peList)
-					)
-				); // This is our machine
-			}
-			
-			
-			// 5. Create a DatacenterCharacteristics object that stores the
-			// properties of a data center: architecture, OS, list of
-			// Machines, allocation policy: time- or space-shared, time zone
-			// and its price (G$/Pe time unit).
-			String arch = "x86"; // system architecture
-			String os = "Linux"; // operating system
-			String vmm = "Xen";
-			double time_zone = 10.0; // time zone this resource located
-			double cost = 3.0; // the cost of using processing in this resource
-			double costPerMem = 0.05; // the cost of using memory in this resource
-			double costPerStorage = 0.001; // the cost of using storage in this
-											// resource
-			double costPerBw = 0.0; // the cost of using bw in this resource
-			LinkedList<Storage> storageList = new LinkedList<Storage>(); // we are not adding SAN
-														// devices by now
-
-			DatacenterCharacteristics characteristics = new DatacenterCharacteristics(
-					arch, os, vmm, hostList, time_zone, cost, costPerMem,
-					costPerStorage, costPerBw);
-
-			// 6. Finally, we need to create a PowerDatacenter object.
-			NetworkDatacenter datacenter = null;
-			try {
-				datacenter = new NetworkDatacenter(name, characteristics, new VmHPCAllocationPolicySimple(hostList), storageList, 0);
-			    //datacenter = new HPCDatacenter(name, characteristics, new VmAllocationPolicySimple(hostList), storageList, 0.0001);
-			} catch (Exception e) {
-				e.printStackTrace();
-			}
-			CreateNetwork(2,datacenter);
-			return datacenter;
+			// 3. Create PEs and add these into an object of PowerPeList.
+			List<Pe> peList = new ArrayList<Pe>();
+			peList.add(new Pe(0, new PeProvisionerSimple(mips))); // need to
+																	// store
+																	// PowerPe
+																	// id and
+																	// MIPS
+																	// Rating
+			peList.add(new Pe(1, new PeProvisionerSimple(mips))); // need to
+																	// store
+																	// PowerPe
+																	// id and
+																	// MIPS
+																	// Rating
+			peList.add(new Pe(2, new PeProvisionerSimple(mips))); // need to
+																	// store
+																	// PowerPe
+																	// id and
+																	// MIPS
+																	// Rating
+			peList.add(new Pe(3, new PeProvisionerSimple(mips))); // need to
+																	// store
+																	// PowerPe
+																	// id and
+																	// MIPS
+																	// Rating
+			peList.add(new Pe(4, new PeProvisionerSimple(mips))); // need to
+																	// store
+																	// PowerPe
+																	// id and
+																	// MIPS
+																	// Rating
+			peList.add(new Pe(5, new PeProvisionerSimple(mips))); // need to
+																	// store
+																	// PowerPe
+																	// id and
+																	// MIPS
+																	// Rating
+			peList.add(new Pe(6, new PeProvisionerSimple(mips))); // need to
+																	// store
+																	// PowerPe
+																	// id and
+																	// MIPS
+																	// Rating
+			peList.add(new Pe(7, new PeProvisionerSimple(mips))); // need to
+																	// store
+																	// PowerPe
+																	// id and
+																	// MIPS
+																	// Rating
+
+			// 4. Create PowerHost with its id and list of PEs and add them to
+			// the list of machines
+			hostList.add(new NetworkHost(i, new RamProvisionerSimple(ram),
+					new BwProvisionerSimple(bw), storage, peList,
+					new VmSchedulerTimeShared(peList))); // This is our machine
 		}
 
-		// We strongly encourage users to develop their own broker policies, to
-		// submit vms and cloudlets according
-		// to the specific rules of the simulated scenario
-		/**
-		 * Creates the broker.
-		 *
-		 * @return the datacenter broker
-		 */
-		private static NetDatacenterBroker createBroker() {
-			NetDatacenterBroker broker = null;
-			try {
-				broker = new NetDatacenterBroker("Broker");
-			} catch (Exception e) {
-				e.printStackTrace();
-				return null;
-			}
-			return broker;
+		// 5. Create a DatacenterCharacteristics object that stores the
+		// properties of a data center: architecture, OS, list of
+		// Machines, allocation policy: time- or space-shared, time zone
+		// and its price (G$/Pe time unit).
+		String arch = "x86"; // system architecture
+		String os = "Linux"; // operating system
+		String vmm = "Xen";
+		double time_zone = 10.0; // time zone this resource located
+		double cost = 3.0; // the cost of using processing in this resource
+		double costPerMem = 0.05; // the cost of using memory in this resource
+		double costPerStorage = 0.001; // the cost of using storage in this
+										// resource
+		double costPerBw = 0.0; // the cost of using bw in this resource
+		LinkedList<Storage> storageList = new LinkedList<Storage>(); // we are
+																		// not
+																		// adding
+																		// SAN
+		// devices by now
+
+		DatacenterCharacteristics characteristics = new DatacenterCharacteristics(
+				arch, os, vmm, hostList, time_zone, cost, costPerMem,
+				costPerStorage, costPerBw);
+
+		// 6. Finally, we need to create a NetworkDatacenter object.
+		NetworkDatacenter datacenter = null;
+		try {
+			datacenter = new NetworkDatacenter(name, characteristics,
+					new NetworkVmAllocationPolicy(hostList), storageList, 0);
+
+		} catch (Exception e) {
+			e.printStackTrace();
 		}
+		// Create Internal Datacenter network
+		CreateNetwork(2, datacenter);
+		return datacenter;
+	}
 
-		/**
-		 * Prints the Cloudlet objects.
-		 *
-		 * @param list list of Cloudlets
-		 * @throws IOException 
-		 */
-		private static void printCloudletList(List<Cloudlet> list) throws IOException {
-			int size = list.size();
-			Cloudlet cloudlet;
-            double fintime=0;
-			String indent = "    ";
-			Log.printLine();
-			Log.printLine("========== OUTPUT ==========");
-			Log.printLine("Cloudlet ID" + indent + "STATUS" + indent
-					+ "Data center ID" + indent + "VM ID" + indent + "Time" + indent
-					+ "Start Time" + indent + "Finish Time");
-
-			DecimalFormat dft = new DecimalFormat("###.##");
-			for (int i = 0; i < size; i++) {
-				cloudlet = list.get(i);
-				Log.print(indent + cloudlet.getCloudletId() + indent + indent);
-
-				if (cloudlet.getCloudletStatus() == Cloudlet.SUCCESS) {
-					Log.print("SUCCESS");
-                    fintime=cloudlet.getFinishTime();
-					Log.printLine(indent + indent + cloudlet.getResourceId()
-							+ indent + indent + indent + cloudlet.getVmId()
-							+ indent + indent
-							+ dft.format(cloudlet.getActualCPUTime()) + indent
-							+ indent + dft.format(cloudlet.getExecStartTime())
-							+ indent + indent
-							+ dft.format(cloudlet.getFinishTime()));
-				}
+	// We strongly encourage users to develop their own broker policies, to
+	// submit vms and cloudlets according
+	// to the specific rules of the simulated scenario
+	/**
+	 * Creates the broker.
+	 * 
+	 * @return the datacenter broker
+	 */
+	private static NetDatacenterBroker createBroker() {
+		NetDatacenterBroker broker = null;
+		try {
+			broker = new NetDatacenterBroker("Broker");
+		} catch (Exception e) {
+			e.printStackTrace();
+			return null;
+		}
+		return broker;
+	}
+
+	/**
+	 * Prints the Cloudlet objects.
+	 * 
+	 * @param list
+	 *            list of Cloudlets
+	 * @throws IOException
+	 */
+	private static void printCloudletList(List<Cloudlet> list)
+			throws IOException {
+		int size = list.size();
+		Cloudlet cloudlet;
+		double fintime = 0;
+		String indent = "    ";
+		Log.printLine();
+		Log.printLine("========== OUTPUT ==========");
+		Log.printLine("Cloudlet ID" + indent + "STATUS" + indent
+				+ "Data center ID" + indent + "VM ID" + indent + "Time"
+				+ indent + "Start Time" + indent + "Finish Time");
+
+		DecimalFormat dft = new DecimalFormat("###.##");
+		for (int i = 0; i < size; i++) {
+			cloudlet = list.get(i);
+			Log.print(indent + cloudlet.getCloudletId() + indent + indent);
+
+			if (cloudlet.getCloudletStatus() == Cloudlet.SUCCESS) {
+				Log.print("SUCCESS");
+				fintime = cloudlet.getFinishTime();
+				Log.printLine(indent + indent + cloudlet.getResourceId()
+						+ indent + indent + indent + cloudlet.getVmId()
+						+ indent + indent
+						+ dft.format(cloudlet.getActualCPUTime()) + indent
+						+ indent + dft.format(cloudlet.getExecStartTime())
+						+ indent + indent
+						+ dft.format(cloudlet.getFinishTime()));
 			}
-			File f=new File("outputmine.csv");
-            if(!f.exists())
-            {
-                   f.createNewFile();
-            }
-
-			FileOutputStream fop1=new FileOutputStream(f,true);
-			fop1.write(("RequestClass ,"+Constants.REQUEST_CLASSES+",numberofcloudlet, "+list.size()+" ,Cached, "+NetDatacenterBroker.cachedcloudlet+" ,Data transfered, "+Constants.totaldatatransfer+ " ,Process Time, "+fintime+"\n").getBytes());
-			fop1.close();
 		}
 
+	}
 
-	
-	static void CreateNetwork(int numhost, NetworkDatacenter dc)
-	{
-		
-//		//Root Switch
-//		Switch swroot=new Switch("Root", Constants.ROOT_LEVEL, dc);
-//		dc.Switchlist.put(swroot.getId(), swroot);
-//		//Agg Switch
-//		Switch aggswitch[]=new Switch[(int) Constants.RootSwitchPort];
-//		for(int j=0;j<Constants.RootSwitchPort;j++)
-//		{
-//			aggswitch[j]=new Switch("Agg"+j, Constants.Agg_LEVEL, dc);
-//			swroot.downlinkswitches.add(aggswitch[j]);
-//			aggswitch[j].uplinkswitches.add(swroot);
-//			dc.Switchlist.put(aggswitch[j].getId(), aggswitch[j]);
-//		}
-		//Edge Switch
-		EdgeSwitch edgeswitch[]=new EdgeSwitch[1];
-	
-		for(int i=0;i<1;i++)
-		{
-			edgeswitch[i]=new EdgeSwitch("Edge"+i, Constants.EDGE_LEVEL, dc);
-			//edgeswitch[i].uplinkswitches.add(null);
+	static void CreateNetwork(int numhost, NetworkDatacenter dc) {
+
+		// //Root Switch
+		// Switch swroot=new Switch("Root", Constants.ROOT_LEVEL, dc);
+		// dc.Switchlist.put(swroot.getId(), swroot);
+		// //Agg Switch
+		// Switch aggswitch[]=new Switch[(int) Constants.RootSwitchPort];
+		// for(int j=0;j<Constants.RootSwitchPort;j++)
+		// {
+		// aggswitch[j]=new Switch("Agg"+j, Constants.Agg_LEVEL, dc);
+		// swroot.downlinkswitches.add(aggswitch[j]);
+		// aggswitch[j].uplinkswitches.add(swroot);
+		// dc.Switchlist.put(aggswitch[j].getId(), aggswitch[j]);
+		// }
+		// Edge Switch
+		EdgeSwitch edgeswitch[] = new EdgeSwitch[1];
+
+		for (int i = 0; i < 1; i++) {
+			edgeswitch[i] = new EdgeSwitch("Edge" + i,
+					NetworkConstants.EDGE_LEVEL, dc);
+			// edgeswitch[i].uplinkswitches.add(null);
 			dc.Switchlist.put(edgeswitch[i].getId(), edgeswitch[i]);
-			//aggswitch[(int) (i/Constants.AggSwitchPort)].downlinkswitches.add(edgeswitch[i]);
+			// aggswitch[(int)
+			// (i/Constants.AggSwitchPort)].downlinkswitches.add(edgeswitch[i]);
 		}
 
-		for(Host hs:dc.getHostList())
-		{
-			NetworkHost hs1=(NetworkHost)hs;
-			hs1.bandwidth=Constants.BandWidthEdgeHost;
-			int switchnum=(int) (hs.getId()/Constants.EdgeSwitchPort);
+		for (Host hs : dc.getHostList()) {
+			NetworkHost hs1 = (NetworkHost) hs;
+			hs1.bandwidth = NetworkConstants.BandWidthEdgeHost;
+			int switchnum = (int) (hs.getId() / NetworkConstants.EdgeSwitchPort);
 			edgeswitch[switchnum].hostlist.put(hs.getId(), hs1);
-			dc.HostToSwitchid.put(hs.getId(),edgeswitch[switchnum].getId());
-			hs1.sw=edgeswitch[switchnum];
-			List<NetworkHost> hslist=hs1.sw.fintimelistHost.get(0D);
-			if(hslist==null)
-			{
-				hslist=new ArrayList<NetworkHost>();
-				hs1.sw.fintimelistHost.put(0D,hslist);
+			dc.HostToSwitchid.put(hs.getId(), edgeswitch[switchnum].getId());
+			hs1.sw = edgeswitch[switchnum];
+			List<NetworkHost> hslist = hs1.sw.fintimelistHost.get(0D);
+			if (hslist == null) {
+				hslist = new ArrayList<NetworkHost>();
+				hs1.sw.fintimelistHost.put(0D, hslist);
 			}
 			hslist.add(hs1);
-			
+
 		}
-			
+
 	}
 }
-
-
-