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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
package org.cloudbus.cloudsim.vms;
import org.cloudbus.cloudsim.brokers.DatacenterBroker;
import org.cloudbus.cloudsim.cloudlets.Cloudlet;
import org.cloudbus.cloudsim.core.Simulation;
import org.cloudbus.cloudsim.datacenters.Datacenter;
import org.cloudbus.cloudsim.hosts.Host;
import org.cloudbus.cloudsim.resources.Processor;
import org.cloudbus.cloudsim.resources.Resource;
import org.cloudbus.cloudsim.resources.ResourceManageable;
import org.cloudbus.cloudsim.schedulers.cloudlet.CloudletScheduler;
import org.cloudsimplus.autoscaling.HorizontalVmScaling;
import org.cloudsimplus.autoscaling.VerticalVmScaling;
import org.cloudsimplus.listeners.EventListener;
import org.cloudsimplus.listeners.VmDatacenterEventInfo;
import org.cloudsimplus.listeners.VmHostEventInfo;
import java.util.Collections;
import java.util.List;
/**
* A class that implements the Null Object Design Pattern for {@link Vm}
* objects.
*
* @author Manoel Campos da Silva Filho
* @see Vm#NULL
*/
class VmNull implements Vm {
@Override public void setId(long id) {/**/}
@Override public long getId() {
return -1;
}
@Override public double getSubmissionDelay() {
return 0;
}
@Override public void setSubmissionDelay(double submissionDelay) {/**/}
@Override public void addStateHistoryEntry(VmStateHistoryEntry entry) {/**/}
@Override public Resource getBw() {
return Resource.NULL;
}
@Override public CloudletScheduler getCloudletScheduler() { return CloudletScheduler.NULL; }
@Override public long getFreePesNumber() { return 0; }
@Override public long getExpectedFreePesNumber() { return 0; }
@Override public long getCurrentRequestedBw() {
return 0;
}
@Override public double getCurrentRequestedMaxMips() {
return 0.0;
}
@Override public List getCurrentRequestedMips() {
return Collections.emptyList();
}
@Override public long getCurrentRequestedRam() {
return 0;
}
@Override public double getCurrentRequestedTotalMips() {
return 0.0;
}
@Override public Host getHost() {
return Host.NULL;
}
@Override public double getMips() {
return 0;
}
@Override public long getNumberOfPes() {
return 0;
}
@Override public Vm addOnHostAllocationListener(EventListener listener) {
return this;
}
@Override public Vm addOnHostDeallocationListener(EventListener listener) { return this; }
@Override public Vm addOnCreationFailureListener(EventListener listener) {
return this;
}
@Override public Vm addOnUpdateProcessingListener(EventListener listener) {
return this;
}
@Override public void notifyOnHostAllocationListeners() {/**/}
@Override public void notifyOnHostDeallocationListeners(Host deallocatedHost) {/**/}
@Override public void notifyOnCreationFailureListeners(Datacenter failedDatacenter) {/**/}
@Override public boolean removeOnUpdateProcessingListener(EventListener listener) {
return false;
}
@Override public boolean removeOnHostAllocationListener(EventListener listener) {
return false;
}
@Override public boolean removeOnHostDeallocationListener(EventListener listener) {
return false;
}
@Override public boolean removeOnCreationFailureListener(EventListener listener) { return false; }
@Override public Resource getRam() {
return Resource.NULL;
}
@Override public Resource getStorage() {
return Resource.NULL;
}
@Override public List getStateHistory() {
return Collections.emptyList();
}
@Override public double getHostCpuUtilization(double time) { return 0; }
@Override public double getCpuPercentUtilization(double time) {
return 0.0;
}
@Override public double getCpuPercentUtilization() {
return 0;
}
@Override public double getHostRamUtilization() { return 0; }
@Override public double getHostBwUtilization() { return 0; }
@Override public double getTotalCpuMipsUtilization() { return 0; }
@Override public double getTotalCpuMipsUtilization(double time) {
return 0.0;
}
@Override public String getUid() {
return "";
}
@Override public DatacenterBroker getBroker() {
return DatacenterBroker.NULL;
}
@Override public void setBroker(DatacenterBroker broker) {/**/}
@Override public double getStartTime() { return 0; }
@Override public Vm setStartTime(double startTime) { return this; }
@Override public double getStopTime() { return 0; }
@Override public double getTotalExecutionTime() { return 0; }
@Override public Vm setStopTime(double stopTime) { return this; }
@Override public double getLastBusyTime() { return 0; }
@Override public double getIdleInterval() { return 0; }
@Override public boolean isIdle() { return false; }
@Override public boolean isIdleEnough(double time) { return false; }
@Override public UtilizationHistory getUtilizationHistory() { return UtilizationHistory.NULL; }
@Override public String getVmm() {
return "";
}
@Override public boolean isCreated() {
return false;
}
@Override public boolean isSuitableForCloudlet(Cloudlet cloudlet) { return false; }
@Override public boolean isInMigration() {
return false;
}
@Override public void setCreated(boolean created) {/**/}
@Override public Vm setBw(long bwCapacity) {
return this;
}
@Override public void setHost(Host host) {/**/}
@Override public void setInMigration(boolean migrating) {/**/}
@Override public Vm setRam(long ramCapacity) {
return this;
}
@Override public Vm setSize(long size) {
return this;
}
@Override public double updateProcessing(double currentTime, List mipsShare) { return 0.0; }
@Override public double updateProcessing(List mipsShare) { return 0; }
@Override public Vm setCloudletScheduler(CloudletScheduler cloudletScheduler) {
return this;
}
@Override public int compareTo(Vm vm) { return 0; }
@Override public double getTotalMipsCapacity() {
return 0.0;
}
@Override public void allocateResource(Class clazz, long amount) {/**/}
@Override public void deallocateResource(Class clazz) {/**/}
@Override public void setFailed(boolean failed) {/**/}
@Override public boolean isFailed() {
return true;
}
@Override public boolean isWorking() { return false; }
@Override public Simulation getSimulation() {
return Simulation.NULL;
}
@Override public void setLastTriedDatacenter(Datacenter lastTriedDatacenter) {/**/}
@Override public Datacenter getLastTriedDatacenter() { return Datacenter.NULL; }
@Override public List getResources() { return Collections.emptyList(); }
@Override public String toString() { return "Vm.NULL"; }
@Override public HorizontalVmScaling getHorizontalScaling() { return HorizontalVmScaling.NULL; }
@Override public Vm setHorizontalScaling(HorizontalVmScaling scaling) throws IllegalArgumentException { return this; }
@Override public Vm setRamVerticalScaling(VerticalVmScaling scaling) throws IllegalArgumentException { return this; }
@Override public Vm setBwVerticalScaling(VerticalVmScaling scaling) throws IllegalArgumentException { return this; }
@Override public Vm setPeVerticalScaling(VerticalVmScaling scaling) throws IllegalArgumentException { return this; }
@Override public VerticalVmScaling getRamVerticalScaling() { return VerticalVmScaling.NULL; }
@Override public VerticalVmScaling getBwVerticalScaling() { return VerticalVmScaling.NULL; }
@Override public VerticalVmScaling getPeVerticalScaling() { return VerticalVmScaling.NULL; }
@Override public Processor getProcessor() { return Processor.NULL; }
@Override public String getDescription() { return ""; }
@Override public Vm setDescription(String description) { return this; }
@Override public VmGroup getGroup() { return null; }
@Override public double getTimeZone() { return Integer.MAX_VALUE; }
@Override public Vm setTimeZone(double timeZone) { return this; }
}