Package org.cloudbus.cloudsim.brokers

Class DatacenterBrokerSimple

java.lang.Object

org.cloudbus.cloudsim.core.CloudSimEntity

org.cloudbus.cloudsim.brokers.DatacenterBrokerAbstract

org.cloudbus.cloudsim.brokers.DatacenterBrokerSimple

All Implemented Interfaces:

Cloneable, Comparable<SimEntity>, Runnable, DatacenterBroker, Identifiable, Nameable, SimEntity

Direct Known Subclasses:

DatacenterBrokerHeuristic

public class DatacenterBrokerSimple
extends DatacenterBrokerAbstract

A simple implementation of DatacenterBroker that try to host customer's VMs at the first Datacenter found. If there isn't capacity in that one, it will try the other ones.

The selection of VMs for each cloudlet is based on a Round-Robin policy, cyclically selecting the next VM from the broker VM list for each requesting cloudlet.

Since:

CloudSim Toolkit 1.0

Author:

Rodrigo N. Calheiros, Anton Beloglazov, Manoel Campos da Silva Filho

Nested Class Summary

Nested classes/interfaces inherited from interface org.cloudbus.cloudsim.core.SimEntity

SimEntity.State

Field Summary

Fields inherited from interface org.cloudbus.cloudsim.brokers.DatacenterBroker

DEF_VM_DESTRUCTION_DELAY, LOGGER, NULL

Fields inherited from interface org.cloudbus.cloudsim.core.SimEntity

NULL

Constructor Summary

Constructors

Constructor	Description
DatacenterBrokerSimple(CloudSim simulation)	Creates a new DatacenterBroker.
DatacenterBrokerSimple(CloudSim simulation, String name)	Creates a DatacenterBroker giving a specific name.

Method Summary

Modifier and Type	Method	Description
Vm	defaultVmMapper(Cloudlet cloudlet)	Defines the default policy used to select a Vm to host a Cloudlet that is waiting to be created.
protected Datacenter	selectDatacenterForWaitingVms()	Defines the policy to select a Datacenter to Host a VM.
protected Datacenter	selectFallbackDatacenterForWaitingVms()	Defines the policy to select a fallback Datacenter to Host a VM when a previous selected Datacenter failed to create the requested VMs.

Methods inherited from class org.cloudbus.cloudsim.brokers.DatacenterBrokerAbstract

addOneTimeOnCreationOfWaitingVmsFinishListener, addOneTimeOnVmsCreatedListener, addOnVmsCreatedListener, bindCloudletToVm, getCloudletCreatedList, getCloudletFinishedList, getCloudletSubmittedList, getCloudletWaitingList, getDatacenter, getDatacenterList, getDatacenterRequestedList, getLastSelectedVm, getVmCreatedList, getVmCreationAcks, getVmCreationRequests, getVmDestructionDelayFunction, getVmExecList, getVmFromCreatedList, getVmWaitingList, getWaitingVm, isThereWaitingCloudlets, processEvent, requestDatacentersToCreateWaitingCloudlets, requestDatacenterToCreateWaitingVms, requestDatacenterToCreateWaitingVms, requestDatacenterToCreateWaitingVms, setCloudletComparator, setDatacenterList, setDatacenterSupplier, setFallbackDatacenterSupplier, setVmComparator, setVmDestructionDelayFunction, setVmMapper, shutdownEntity, startEntity, submitCloudlet, submitCloudletList, submitCloudletList, submitCloudletList, submitCloudletList, submitVm, submitVmList, submitVmList, toString

Methods inherited from class org.cloudbus.cloudsim.core.CloudSimEntity

cancelEvent, clone, compareTo, equals, getId, getName, getNextEvent, getNextEvent, getSimulation, getState, hashCode, isAlive, isFinished, isStarted, numEventsWaiting, numEventsWaiting, pause, run, schedule, schedule, schedule, schedule, scheduleFirst, scheduleFirst, scheduleFirstNow, scheduleFirstNow, scheduleNow, scheduleNow, selectEvent, send, send, sendNow, sendNow, setEventBuffer, setId, setName, setSimulation, setStarted, setState, start, waitForEvent

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.lang.Comparable

compareTo

Methods inherited from interface org.cloudbus.cloudsim.core.Identifiable

getId

Methods inherited from interface org.cloudbus.cloudsim.core.Nameable

getName

Methods inherited from interface org.cloudbus.cloudsim.core.SimEntity

getSimulation, getState, isAlive, isFinished, isStarted, run, schedule, schedule, schedule, schedule, setName, setSimulation, setState, start

Constructor Detail

DatacenterBrokerSimple

public DatacenterBrokerSimple(CloudSim simulation)

Creates a new DatacenterBroker.

Parameters:

simulation - name to be associated with this entity

DatacenterBrokerSimple

public DatacenterBrokerSimple(CloudSim simulation,
                              String name)

Creates a DatacenterBroker giving a specific name.

Parameters:

simulation - the CloudSim instance that represents the simulation the Entity is related to

name - the DatacenterBroker name

Method Detail

selectDatacenterForWaitingVms

protected Datacenter selectDatacenterForWaitingVms()

Defines the policy to select a Datacenter to Host a VM. It always selects the first Datacenter from the Datacenter list.

Returns:

the Datacenter selected to request the creating of waiting VMs or Datacenter.NULL if no suitable Datacenter was found

selectFallbackDatacenterForWaitingVms

protected Datacenter selectFallbackDatacenterForWaitingVms()

Defines the policy to select a fallback Datacenter to Host a VM when a previous selected Datacenter failed to create the requested VMs.

It gets the first Datacenter that has not been tried yet.

Returns:

the Datacenter selected to try creating the remaining VMs or Datacenter.NULL if no suitable Datacenter was found

defaultVmMapper

public Vm defaultVmMapper(Cloudlet cloudlet)

Description copied from interface: DatacenterBroker

Defines the default policy used to select a Vm to host a Cloudlet that is waiting to be created.
It applies a Round-Robin policy to cyclically select the next Vm from the list of waiting VMs.

Parameters:

cloudlet - the cloudlet that needs a VM to be placed into

Returns:

the selected Vm for the cloudlet or Vm.NULL if no suitable VM was found