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CloudSim Plus: A modern, highly extensible and easier-to-use Java 8+ Framework for Modeling and Simulation of Cloud Computing Infrastructures and Services
/*
* 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.resources;
import org.cloudbus.cloudsim.provisioners.PeProvisioner;
import org.cloudbus.cloudsim.provisioners.PeProvisionerSimple;
import java.util.Objects;
/**
* Pe (Processing Element) class represents a CPU core of a physical machine (PM),
* defined in terms of Millions Instructions Per Second (MIPS) rating.
* Such a class allows managing the Pe capacity and allocation.
*
*
* ASSUMPTION: All PEs under the same Machine have the same MIPS rating.
*
* @TODO This assumption is not being assured on different classes (where other TODOs were included)
*
* @author Manzur Murshed
* @author Rajkumar Buyya
* @since CloudSim Toolkit 1.0
*/
public class PeSimple extends ResourceManageableAbstract implements Pe {
/** @see #setDefaultMips(double) */
private static double defaultMips = 1000;
/** @see #getId() */
private long id;
/** @see #getStatus() */
private Status status;
/** @see #getPeProvisioner() */
private PeProvisioner peProvisioner;
/**
* Instantiates a PE object with the {@link #getDefaultMips() default MIPS capacity} and using a {@link PeProvisionerSimple}.
* The id of the PE is just set when a List of PEs is assigned to a Host.
*
* @see #PeSimple(double, PeProvisioner)
* @see #PeSimple(double)
* @see #setDefaultMips(double)
*/
public PeSimple() {
this(PeSimple.defaultMips);
}
/**
* Instantiates a PE object using a {@link PeProvisionerSimple}.
* The id of the PE is just set when a List of PEs is assigned to a Host.
*
* @param mipsCapacity the capacity of the PE in MIPS (Million Instructions per Second)
* @see #PeSimple(double, PeProvisioner)
* @see #PeSimple()
*/
public PeSimple(final double mipsCapacity) {
this(mipsCapacity, new PeProvisionerSimple());
}
/**
* Instantiates a PE object.
* The id of the PE is just set when a List of PEs is assigned to a Host.
*
* @param mipsCapacity the capacity of the PE in MIPS (Million Instructions per Second)
* @param peProvisioner the provisioner that will manage the allocation of this physical Pe for VMs
* @see #PeSimple(double)
* @see #PeSimple()
*/
public PeSimple(final double mipsCapacity, final PeProvisioner peProvisioner) {
super((long)mipsCapacity, "Unit");
setId(-1);
setPeProvisioner(peProvisioner);
// when created it should be set to FREE, i.e. available for use.
setStatus(Status.FREE);
}
/**
* Instantiates a PE object defining a given id.
* The id of the PE is just set when a List of PEs is assigned to a Host.
*
* @param id the PE id
* @param mipsCapacity the capacity of the PE in MIPS (Million Instructions per Second)
* @param peProvisioner the provisioner that will manage the allocation of this physical Pe for VMs
* @see #PeSimple(double, PeProvisioner)
* @see #PeSimple(double)
* @see #PeSimple()
*/
public PeSimple(final int id, final double mipsCapacity, final PeProvisioner peProvisioner) {
this(mipsCapacity, peProvisioner);
this.setId(id);
}
/**
* Gets the default MIPS capacity to be used to create PEs when the no-args constructor is used.
* @return
*/
public static double getDefaultMips() {
return defaultMips;
}
/**
* Sets the default MIPS capacity to be used to create PEs when the no-args constructor is used.
* @param defaultMips the new default MIPS capacity to set
* @return
*/
public static void setDefaultMips(final double defaultMips) {
PeSimple.defaultMips = defaultMips;
}
@Override
public final void setId(final long id) {
this.id = id;
}
@Override
public long getId() {
return id;
}
@Override
public Status getStatus() {
return status;
}
@Override
public final boolean setStatus(final Status status) {
this.status = status;
return true;
}
@Override
public boolean setCapacity(final double mipsCapacity) {
return setCapacity((long)mipsCapacity);
}
@Override
public final Pe setPeProvisioner(final PeProvisioner peProvisioner) {
this.peProvisioner = Objects.requireNonNull(peProvisioner);
this.peProvisioner.setPe(this);
return this;
}
/**
* Gets the PE provisioner that manages the allocation
* of this physical PE to virtual machines.
*
* @return the PE provisioner
*/
@Override
public PeProvisioner getPeProvisioner() {
return peProvisioner;
}
@Override
public String toString() {
return "%s %d: %s".formatted(getClass().getSimpleName(), id, status);
}
@Override
public boolean isWorking() {
return !isFailed();
}
@Override
public boolean isFailed() {
return Status.FAILED.equals(status);
}
@Override
public boolean isFree() {
return Status.FREE.equals(status);
}
@Override
public boolean isBusy() {
return Status.BUSY.equals(status);
}
}
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