/*
* 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.lists;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import org.cloudbus.cloudsim.Vm;
import org.cloudbus.cloudsim.core.CloudSim;
import org.cloudbus.cloudsim.lists.VmList;
/**
* PowerVmList is a collection of operations on lists of power-enabled VMs.
*
* <br/>If you are using any algorithms, policies or workload included in the power package please cite
* the following paper:<br/>
*
* <ul>
* <li><a href="http://dx.doi.org/10.1002/cpe.1867">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</a>
* </ul>
*
* @author Anton Beloglazov
*
* @author Anton Beloglazov
* @since CloudSim Toolkit 2.0
* @todo It is a list, so it would be better inside the org.cloudbus.cloudsim.lists package.
* This class in fact doesn't use a list or PowerVm, but a list of Vm.
* The used methods are just of the Vm class, thus doesn't have
* a reason to create another class. This classes don't either stores lists of VM,
* they only perform operations on lists given by parameter.
* So, the method of this class would be moved to the VmList class
* and the class erased.
*/
public class PowerVmList extends VmList {
/**
* Sort a given list of VMs by cpu utilization.
*
* @param vmList the vm list to be sorted
*/
public static <T extends Vm> void sortByCpuUtilization(List<T> vmList) {
Collections.sort(vmList, new Comparator<T>() {
@Override
public int compare(T a, T b) throws ClassCastException {
Double aUtilization = a.getTotalUtilizationOfCpuMips(CloudSim.clock());
Double bUtilization = b.getTotalUtilizationOfCpuMips(CloudSim.clock());
return bUtilization.compareTo(aUtilization);
}
});
}
}