Helper.java

package EE5903;

import java.text.DecimalFormat;
import java.util.ArrayList;
import java.util.LinkedList;
import java.util.List;
import java.util.Random;

import org.cloudbus.cloudsim.Cloudlet;
import org.cloudbus.cloudsim.CloudletSchedulerTimeShared;
import org.cloudbus.cloudsim.Datacenter;
import org.cloudbus.cloudsim.DatacenterCharacteristics;
import org.cloudbus.cloudsim.Host;
import org.cloudbus.cloudsim.Log;
import org.cloudbus.cloudsim.Pe;
import org.cloudbus.cloudsim.Storage;
import org.cloudbus.cloudsim.UtilizationModel;
import org.cloudbus.cloudsim.UtilizationModelFull;
import org.cloudbus.cloudsim.Vm;
import org.cloudbus.cloudsim.VmAllocationPolicySimple;
import org.cloudbus.cloudsim.VmSchedulerTimeShared;
import org.cloudbus.cloudsim.provisioners.BwProvisionerSimple;
import org.cloudbus.cloudsim.provisioners.PeProvisionerSimple;
import org.cloudbus.cloudsim.provisioners.RamProvisionerSimple;

public class Helper {
	
	Random randomGenerator = new Random(); // Gaussian distribution with mean 0 and standard deviation 1

	public FestalDatacenterBroker createBroker() {
		FestalDatacenterBroker broker = null;
		try {
			broker = new FestalDatacenterBroker("Broker");
		} catch (Exception e) {
			e.printStackTrace();
			return null;
		}
		return broker;
	}

	public Datacenter createDatacenter(String name){

		// Here are the steps needed to create a PowerDatacenter:
		// 1. We need to create a list to store one or more
		//    Machines
		List<Host> hostList = createHostList(100);

		// 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 = 0.1;	// the cost of using storage in this resource
		double costPerBw = 0.1;			// 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.
		Datacenter datacenter = null;
		int schedulingInterval = 0;
		VmAllocationPolicySimple vmAllocationPolicy = new VmAllocationPolicySimple(hostList);
		try {
			datacenter = new Datacenter(name, characteristics, vmAllocationPolicy, storageList, schedulingInterval);
		} catch (Exception e) {
			e.printStackTrace();
		}
		// TODO:datacenter.setDisableMigrations(false);
		return datacenter;
	}

	public List<Host> createHostList(int hostsNumber){
		List<Host> hostList = new ArrayList<Host>();
		for (int i=0; i<hostsNumber; i++) {
			// 2. A Machine contains one or more PEs or CPUs/Cores. Therefore, should
			//    create a list to store these PEs before creating
			//    a Machine.
			List<Pe> peList = new ArrayList<Pe>();

			//TODO: try different MIPS
			int mips = 1000;

			// 3. Create PEs and add these into the list.
			//for a quad-core machine, a list of 4 PEs is required:
			peList.add(new Pe(0, new PeProvisionerSimple(mips))); // need to store Pe id and MIPS Rating
			peList.add(new Pe(1, new PeProvisionerSimple(mips)));
			peList.add(new Pe(2, new PeProvisionerSimple(mips)));
			peList.add(new Pe(3, new PeProvisionerSimple(mips)));

			//4. Create Hosts with its id and list of PEs and add them to the list of machines
			int hostId=0;
			int ram = 16384; //host memory (MB)
			long storage = 1000000; //host storage
			int bw = 10000;

			hostList.add(
	    			new Host(
	    				hostId,
	    				new RamProvisionerSimple(ram),
	    				new BwProvisionerSimple(bw),
	    				storage,
	    				peList,
	    				new VmSchedulerTimeShared(peList)
	    			)
	    		); // This is our first machine
			hostList.add(
	    			new Host(
	    				hostId,
	    				new RamProvisionerSimple(ram),
	    				new BwProvisionerSimple(bw),
	    				storage,
	    				peList,
	    				new VmSchedulerTimeShared(peList)
	    			)
	    		); // This is our second machine
			hostList.add(
	    			new Host(
	    				hostId,
	    				new RamProvisionerSimple(ram),
	    				new BwProvisionerSimple(bw),
	    				storage,
	    				peList,
	    				new VmSchedulerTimeShared(peList)
	    			)
	    		); // This is our third machine
		}
		return hostList;
	}

	public List<Vm> createVM(int userId, int vms, int idShift) {
		//Creates a container to store VMs. This list is passed to the broker later
		LinkedList<Vm> list = new LinkedList<Vm>();

		//VM Parameters
		long size = 10000; //image size (MB)
		int ram = 512; //vm memory (MB)
		int mips = 250;
		long bw = 1000;
		int pesNumber = 1; //number of cpus
		String vmm = "Xen"; //VMM name

		//create VMs
		Vm[] vm = new Vm[vms];

		for(int i=0;i<vms;i++){
			vm[i] = new Vm(idShift + i, userId, mips, pesNumber, ram, bw, size, vmm, new CloudletSchedulerTimeShared());
			list.add(vm[i]);
		}

		return list;
	}

	public List<Cloudlet> createCloudlet(int userId, int cloudlets, int idShift){
		// Creates a container to store Cloudlets
		LinkedList<Cloudlet> list = new LinkedList<Cloudlet>();

		for(int i=0;i<cloudlets;i++){
			Cloudlet cloudlet = createRandomCloudlet(idShift + i, userId);
			list.add(cloudlet);
		}
		return list;
	}
	
	
	public Cloudlet createRandomCloudlet(int cloudletId, int userId) {
		int pesNumber = 1;
		UtilizationModel utilizationModel = new UtilizationModelFull();
		// cloudlet parameters, random number is used as mean and standard deviation 
		// TODO: find better number from literature
		long length = getGaussianRandom(40000,4000);
		long fileSize = getGaussianRandom(300,30);
		long outputSize = getGaussianRandom(300,30);
		Cloudlet newCloudlet = new Cloudlet(cloudletId,length,pesNumber,fileSize,outputSize,utilizationModel,utilizationModel,utilizationModel);
		// setting the owner of these Cloudlets
		newCloudlet.setUserId(userId);
		return newCloudlet;
	}
	
	public int getGaussianRandom(int mean, int range) {
		
		int randomNumber = (int) (randomGenerator.nextGaussian()*range + mean);
		if (randomNumber < 0)
			randomNumber = 0;
		return randomNumber;
	}

	@SuppressWarnings("deprecation")
	public void printCloudletList(List<Cloudlet> list) {
		int size = list.size();
		Cloudlet cloudlet;

		String indent = "    ";
		Log.printLine();
		Log.printLine("========== OUTPUT ==========");
		Log.printLine("Cloudlet ID" + indent + "STATUS" + indent +
				"Data center ID" + indent + "VM ID" + indent + 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");

				Log.printLine( indent + indent + cloudlet.getResourceId() + indent + indent + indent + cloudlet.getVmId() +
						indent + indent + indent + dft.format(cloudlet.getActualCPUTime()) +
						indent + indent + dft.format(cloudlet.getExecStartTime())+ indent + indent + indent + dft.format(cloudlet.getFinishTime()));
			}
		}

	}
}