org.safs.control

Class ControlObservable

java.lang.Object

java.util.Observable

org.safs.control.ControlObservable

All Implemented Interfaces:

java.lang.Runnable

public class ControlObservable
extends java.util.Observable
implements java.lang.Runnable

Description : ControlObservable, extends Observable, implements Runnable. This is the 'other thread' which sends data to the Control portion. Implement Runnable so that our 'run' method can be the result of starting another Thread so that the controler/Observer can receive the notification messages without blocking. This class does all of the thread stuff, including the 'synchronizing'

Since:

DEC 17, 2003
DEC 17, 2003 (DBauman) Original Release
DEC 17, 2003 (DBauman) we also implement ControlProcessing so that we can tell the GUI when we are done processing.

Author:

dbauman

Constructor Summary

Constructors

Constructor and Description
ControlObservable(ControlProcessing controlProcessing) constructor, starts our thread

Method Summary

Modifier and Type	Method and Description
void	addCommand(java.lang.Object cmd)
boolean	isEmpty()
void	run() Purpose: run method of another thread.

Methods inherited from class java.util.Observable

addObserver, clearChanged, countObservers, deleteObserver, deleteObservers, hasChanged, notifyObservers, notifyObservers, setChanged

Methods inherited from class java.lang.Object

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

Constructor Detail

ControlObservable

public ControlObservable(ControlProcessing controlProcessing)

constructor, starts our thread

Method Detail

isEmpty

public boolean isEmpty()

addCommand

public void addCommand(java.lang.Object cmd)

run

public void run()

Purpose: run method of another thread. Used solely by the notifyOurObserver method via the 'cmds'. It is best to keep the observer (controller) in a separate thread from the GUI (view) because if the user presses a button twice during a test then nothing will happen.
Side Effects: 'cmds', a command is grabbed from this queue
State Read: 'cmds'
Assumptions: We sleep for 100 ms between commands inside an infinite loop.

Specified by:

run in interface java.lang.Runnable