com.redhat.thermostat.backend.system

Class SystemBackend

java.lang.Object

com.redhat.thermostat.backend.Backend

com.redhat.thermostat.backend.system.SystemBackend

All Implemented Interfaces:

JvmStatusListener, JvmStatusNotifier

public class SystemBackend
extends Backend
implements JvmStatusNotifier, JvmStatusListener

Field Summary

Fields inherited from class com.redhat.thermostat.backend.Backend

df

Constructor Summary

Constructors

Constructor and Description
SystemBackend()

Method Summary

Methods

Modifier and Type	Method and Description
boolean	activate() Activate the Backend.
void	addJvmStatusListener(JvmStatusListener listener) Request to be informed when JVM processes are started or stopped.
boolean	attachToNewProcessByDefault() A Backend may be configured to automatically begin collecting from new Java processes.
boolean	deactivate() Deactivate the Backend.
protected Collection<Category>	getCategories()
String	getConfigurationValue(String key)
boolean	isActive()
void	jvmStarted(int vmId)
void	jvmStopped(int vmId)
void	removeJvmStatusListener(JvmStatusListener listener) Request to no longer be informed when JVM processes are started or stopped.
protected void	setDAOFactoryAction()

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

getConfigurationMap, getDescription, getID, getName, getObserveNewJvm, getVendor, getVersion, setConfigurationValue, setConfigurationValueImpl, setDAOFactory, setInitialConfiguration, setObserveNewJvm

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

SystemBackend

public SystemBackend()

Method Detail

setDAOFactoryAction

protected void setDAOFactoryAction()

Specified by:

setDAOFactoryAction in class Backend

activate

public boolean activate()

Description copied from class: 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

Specified by:

activate in class Backend

Returns:

true on success, false if there was an error

deactivate

public boolean deactivate()

Description copied from class: 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

Specified by:

deactivate in class Backend

Returns:

true on success

isActive

public boolean isActive()

Specified by:

isActive in class Backend

Returns:

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

getConfigurationValue

public String getConfigurationValue(String key)

Specified by:

getConfigurationValue in class Backend

Parameters:

key - The constant key that corresponds to the desired configuration value

Returns:

The current value of the configuration value corresponding to the key given.

getCategories

protected Collection<Category> getCategories()

Specified by:

getCategories in class Backend

attachToNewProcessByDefault

public boolean attachToNewProcessByDefault()

Description copied from class: Backend

A Backend may be configured to automatically begin collecting from new Java processes. This method determines whether this will be the case when the backend is initially started.

Specified by:

attachToNewProcessByDefault in class Backend

Returns:

true if the initial backend behaviour is to attach to new java processes, false otherwise.

addJvmStatusListener

public void addJvmStatusListener(JvmStatusListener listener)

Description copied from interface: JvmStatusNotifier

Request to be informed when JVM processes are started or stopped.

Specified by:

addJvmStatusListener in interface JvmStatusNotifier

Parameters:

listener - the receiver of future JvmStatusListener.jvmStarted() and JvmStatusListener.jvmStopped() calls

removeJvmStatusListener

public void removeJvmStatusListener(JvmStatusListener listener)

Description copied from interface: JvmStatusNotifier

Request to no longer be informed when JVM processes are started or stopped.

Specified by:

removeJvmStatusListener in interface JvmStatusNotifier

Parameters:

listener - the JvmStatusListener to be unregistered.

jvmStarted

public void jvmStarted(int vmId)

Specified by:

jvmStarted in interface JvmStatusListener

jvmStopped

public void jvmStopped(int vmId)

Specified by:

jvmStopped in interface JvmStatusListener