net.metanotion.util.observers
Class SimpleObserverManager<O,M extends Message<O>>

java.lang.Object
  net.metanotion.util.observers.SimpleObserverManager<O,M>

All Implemented Interfaces:

ObserverManager<O,M>

public class SimpleObserverManager<O,M extends Message<O>>
extends java.lang.Object
implements ObserverManager<O,M>

Field Summary

protected java.util.LinkedList<O>

observers

Constructor Summary

SimpleObserverManager()

Method Summary

boolean	add(O observer) Register an Observer as a listener.
boolean	remove(O observer) Remove an Observer as a listener.
boolean	send(M m) Broadcast a message to all registered observers.

Methods inherited from class java.lang.Object

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

Field Detail

observers

protected java.util.LinkedList<O> observers

Constructor Detail

SimpleObserverManager

public SimpleObserverManager()

Method Detail

add

public boolean add(O observer)

Description copied from interface: ObserverManager

Register an Observer as a listener.

Specified by:

add in interface ObserverManager<O,M extends Message<O>>

Parameters:

observer - Observer to start receiving messages.

Returns:

True if the observer was successfully registered, false otherwise.

remove

public boolean remove(O observer)

Description copied from interface: ObserverManager

Remove an Observer as a listener.

Specified by:

remove in interface ObserverManager<O,M extends Message<O>>

Parameters:

observer - Observer to remove

Returns:

True if the observer was successfully removed, false otherwise.

send

public boolean send(M m)

Description copied from interface: ObserverManager

Broadcast a message to all registered observers.

Specified by:

send in interface ObserverManager<O,M extends Message<O>>

Parameters:

m - Message to send to observers.

Returns:

True if the message was queued, false otherwise