org.lsst.ccs.utilities.dispatch
Class SynchronousCommandDispatcher<T>

java.lang.Object
  org.lsst.ccs.utilities.dispatch.SynchronousCommandDispatcher<T>

public class SynchronousCommandDispatcher<T>
extends java.lang.Object

Registers codes interested in receiving commands. Each code should know that it is handling an instance of SynchronousCommandFor and should behave accordingly.

The dispatchCommand methods execute this command sequentially on each "executant" object. The order of calls is not specified.

Author:

bernard AMADE

Field Summary

protected java.util.concurrent.CopyOnWriteArrayList<T>

list

Constructor Summary

SynchronousCommandDispatcher()

Method Summary

void	addExecutant(T executant) Registers a code ready to receive "synchronous" commands
void	dispatchCommand(SynchronousCommandFor<? super T> command) Sends a command to all registered codes ready to handle it.
void	removeExecutant(T executant) Remove the code from the listeners list

Methods inherited from class java.lang.Object

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

Field Detail

list

protected java.util.concurrent.CopyOnWriteArrayList<T> list

Constructor Detail

SynchronousCommandDispatcher

public SynchronousCommandDispatcher()

Method Detail

addExecutant

public void addExecutant(T executant)

Registers a code ready to receive "synchronous" commands

Parameters:

executant -

removeExecutant

public void removeExecutant(T executant)

Remove the code from the listeners list

Parameters:

executant -

dispatchCommand

public void dispatchCommand(SynchronousCommandFor<? super T> command)

Sends a command to all registered codes ready to handle it.

If an exception is fired it is catched and logged. proper handling of Exception should be performed by the implementing commands.