com.redhat.thermostat.vm.cpu.agent.internal

Class VmCpuBackend

java.lang.Object

com.redhat.thermostat.backend.BaseBackend

com.redhat.thermostat.vm.cpu.agent.internal.VmCpuBackend

All Implemented Interfaces:

VmStatusListener, Backend, Ordered

public class VmCpuBackend
extends BaseBackend
implements VmStatusListener

Nested Class Summary

Nested classes/interfaces inherited from interface com.redhat.thermostat.agent.VmStatusListener

VmStatusListener.Status

Field Summary

Fields inherited from interface com.redhat.thermostat.common.Ordered

ORDER_CPU_GROUP, ORDER_DEFAULT_GROUP, ORDER_IO_GROUP, ORDER_MEMORY_GROUP, ORDER_NETWORK_GROUP, ORDER_THREAD_GROUP, ORDER_USER_GROUP

Constructor Summary

Constructors

Constructor and Description
VmCpuBackend(ScheduledExecutorService executor, VmCpuStatDAO vmCpuStatDao, Version version, VmStatusListenerRegistrar registrar)

Method Summary

Methods

Modifier and Type	Method and Description
boolean	activate() Activate the Backend.
boolean	deactivate() Deactivate the Backend.
int	getOrderValue() Defines a value to be used for assigning an order to services.
boolean	isActive()
void	vmStatusChanged(VmStatusListener.Status newStatus, int pid)

Methods inherited from class com.redhat.thermostat.backend.BaseBackend

equals, getDescription, getName, getObserveNewJvm, getVendor, getVersion, hashCode, setObserveNewJvm, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

VmCpuBackend

public VmCpuBackend(ScheduledExecutorService executor,
            VmCpuStatDAO vmCpuStatDao,
            Version version,
            VmStatusListenerRegistrar registrar)

Method Detail

activate

public boolean activate()

Description copied from interface: Backend

Activate the Backend. Based on the current configuration, begin pushing data to the Storage layer. If the Backend is already active, this method should have no effect.

This method is called by the framework when the Backend is registered.

Specified by:

activate in interface Backend

Returns:

true if the backend was activated successfully or already active. false if there was an error

deactivate

public boolean deactivate()

Description copied from interface: Backend

Deactivate the Backend. The backend should release any resources that were obtained as a direct result of a call to Backend.activate(). If the Backend is not active, this method should have no effect

This method is called by the framework when the Backend is deregistered.

Specified by:

deactivate in interface Backend

Returns:

true if the backend was successfully deactivated or already inactive. false if the backend is still active.

isActive

public boolean isActive()

Specified by:

isActive in interface Backend

Returns:

a boolean indicating whether the backend is currently active on this host

getOrderValue

public int getOrderValue()

Description copied from interface: Ordered

Defines a value to be used for assigning an order to services. A service with a lower order value will be processed before a service of a higher order value. This ordering is used, for example, to sort views in a client's UI. Please take care to ensure the value returned by this implementation does not collide with other implementations. The order value should be offset from one of the provided constants in this class. Such as Ordered.ORDER_DEFAULT_GROUP.

Specified by:

getOrderValue in interface Ordered

Returns:

the order value

vmStatusChanged

public void vmStatusChanged(VmStatusListener.Status newStatus,
                   int pid)

Specified by:

vmStatusChanged in interface VmStatusListener