/*
* 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) 2009-2012, The University of Melbourne, Australia
*/
package org.cloudbus.cloudsim.power;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.cloudbus.cloudsim.Host;
import org.cloudbus.cloudsim.Log;
import org.cloudbus.cloudsim.Vm;
import org.cloudbus.cloudsim.VmAllocationPolicy;
import org.cloudbus.cloudsim.core.CloudSim;
/**
* The class of an abstract power-aware VM allocation policy.
*
* If you are using any algorithms, policies or workload included in the power package, please cite
* the following paper:
*
* Anton Beloglazov, and Rajkumar Buyya, "Optimal Online Deterministic Algorithms and Adaptive
* Heuristics for Energy and Performance Efficient Dynamic Consolidation of Virtual Machines in
* Cloud Data Centers", Concurrency and Computation: Practice and Experience (CCPE), Volume 24,
* Issue 13, Pages: 1397-1420, John Wiley & Sons, Ltd, New York, USA, 2012
*
* @author Anton Beloglazov
* @since CloudSim Toolkit 3.0
*/
public abstract class PowerVmAllocationPolicyAbstract extends VmAllocationPolicy {
/** The vm table. */
private final Map<String, Host> vmTable = new HashMap<String, Host>();
/**
* Instantiates a new power vm allocation policy abstract.
*
* @param list the list
*/
public PowerVmAllocationPolicyAbstract(List<? extends Host> list) {
super(list);
}
/*
* (non-Javadoc)
* @see org.cloudbus.cloudsim.VmAllocationPolicy#allocateHostForVm(org.cloudbus.cloudsim.Vm)
*/
@Override
public boolean allocateHostForVm(Vm vm) {
return allocateHostForVm(vm, findHostForVm(vm));
}
/*
* (non-Javadoc)
* @see org.cloudbus.cloudsim.VmAllocationPolicy#allocateHostForVm(org.cloudbus.cloudsim.Vm,
* org.cloudbus.cloudsim.Host)
*/
@Override
public boolean allocateHostForVm(Vm vm, Host host) {
if (host == null) {
Log.formatLine("%.2f: No suitable host found for VM #" + vm.getId() + "\n", CloudSim.clock());
return false;
}
if (host.vmCreate(vm)) { // if vm has been succesfully created in the host
getVmTable().put(vm.getUid(), host);
Log.formatLine(
"%.2f: VM #" + vm.getId() + " has been allocated to the host #" + host.getId(),
CloudSim.clock());
return true;
}
Log.formatLine(
"%.2f: Creation of VM #" + vm.getId() + " on the host #" + host.getId() + " failed\n",
CloudSim.clock());
return false;
}
/**
* Find host for vm.
*
* @param vm the vm
* @return the power host
*/
public PowerHost findHostForVm(Vm vm) {
for (PowerHost host : this.<PowerHost> getHostList()) {
if (host.isSuitableForVm(vm)) {
return host;
}
}
return null;
}
/*
* (non-Javadoc)
* @see org.cloudbus.cloudsim.VmAllocationPolicy#deallocateHostForVm(org.cloudbus.cloudsim.Vm)
*/
@Override
public void deallocateHostForVm(Vm vm) {
Host host = getVmTable().remove(vm.getUid());
if (host != null) {
host.vmDestroy(vm);
}
}
/*
* (non-Javadoc)
* @see org.cloudbus.cloudsim.VmAllocationPolicy#getHost(org.cloudbus.cloudsim.Vm)
*/
@Override
public Host getHost(Vm vm) {
return getVmTable().get(vm.getUid());
}
/*
* (non-Javadoc)
* @see org.cloudbus.cloudsim.VmAllocationPolicy#getHost(int, int)
*/
@Override
public Host getHost(int vmId, int userId) {
return getVmTable().get(Vm.getUid(userId, vmId));
}
/**
* Gets the vm table.
*
* @return the vm table
*/
public Map<String, Host> getVmTable() {
return vmTable;
}
}