org.eclipse.eavp.viz.service.mesh.datastructures.test

Class TestComponentListener

java.lang.Object

org.eclipse.eavp.viz.service.mesh.datastructures.test.TestComponentListener

All Implemented Interfaces:

IManagedUpdateableListener, IVizUpdateableListener

public class TestComponentListener
extends java.lang.Object
implements IManagedUpdateableListener, IVizUpdateableListener

This class realizes the IComponentListener interface and is used to test Component call backs in tests. It has a unlisted, volatile attribute called serviceLatch that is a CountDownLatch. It is instantiated in reset and constructor. This is used to utilize threads more effectively by waiting for a thread to be free in order to notify if a component was changed. The update operation calls countDown on the latch.

Author:

Jay Jay Billings, Robert Smith

Field Summary

Fields inherited from interface org.eclipse.eavp.viz.datastructures.VizObject.IVizUpdateableListener

component

Constructor Summary

Constructors

Constructor and Description
TestComponentListener() The Constructor.

Method Summary

Modifier and Type	Method and Description
java.util.ArrayList<SubscriptionType>	getSubscriptions(IManagedUpdateable source) Polls the listener for a list of the types of events it wants to receive from the given source.
void	reset() This operation resets the countdownlatch to 0.
void	update(IManagedUpdateable component, SubscriptionType[] type) Receive an update, including the source component and type of event that triggered the update.
void	update(IVizUpdateable component) (non-Javadoc)
boolean	wasNotified() This operation returns the notification state of the listener.

Methods inherited from class java.lang.Object

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

Constructor Detail

TestComponentListener

public TestComponentListener()

The Constructor. Sets up the CountDownLatch to one.

Method Detail

wasNotified

public boolean wasNotified()

This operation returns the notification state of the listener.

Returns:

True if the listener has been notified of an update, false otherwise.

reset

public void reset()

This operation resets the countdownlatch to 0.

update

public void update(IVizUpdateable component)

(non-Javadoc)

Specified by:

update in interface IVizUpdateableListener

Parameters:

component - The component that was updated in some way.

See Also:

IUpdateableListener#update(IUpdateable component)

getSubscriptions

public java.util.ArrayList<SubscriptionType> getSubscriptions(IManagedUpdateable source)

Description copied from interface: IManagedUpdateableListener

Polls the listener for a list of the types of events it wants to receive from the given source.

Specified by:

getSubscriptions in interface IManagedUpdateableListener

Parameters:

source - The object which this listener will listen to

Returns:

An array of the event types the listener will be notified of during updates

update

public void update(IManagedUpdateable component,
                   SubscriptionType[] type)

Description copied from interface: IManagedUpdateableListener

Receive an update, including the source component and type of event that triggered the update.

Specified by:

update in interface IManagedUpdateableListener

Parameters:

component - The updateable component the update is coming from

type - The event type that of the update