/*
* 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.List;
import java.util.Random;
import org.cloudbus.cloudsim.Vm;
/**
* The Random Selection (RS) VM selection 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 class PowerVmSelectionPolicyRandomSelection extends PowerVmSelectionPolicy {
/*
* (non-Javadoc)
* @see
* org.cloudbus.cloudsim.experiments.power.PowerVmSelectionPolicy#getVmsToMigrate(org.cloudbus
* .cloudsim.power.PowerHost)
*/
@Override
public Vm getVmToMigrate(PowerHost host) {
List<PowerVm> migratableVms = getMigratableVms(host);
if (migratableVms.isEmpty()) {
return null;
}
int index = (new Random()).nextInt(migratableVms.size());
return migratableVms.get(index);
}
}