com.portal.browse

Class WorkerThread

java.lang.Object

com.portal.browse.WorkerThread

All Implemented Interfaces:

Serializable

public abstract class WorkerThread
extends Object
implements Serializable

An abstract class that you subclass to perform GUI-related work in a dedicated thread. This is useful when you need to do a time consuming operation, as in retrieving information from the database, that will get displayed in the UI. To use this class, implement the construct method for the time consuming operation. To update the UI, use the finished method to have the update placed on the event queue. This class was derived from the examples provided by Sun Microsystems.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
WorkerThread() Start a thread that will call the construct method and then exit.

Method Summary

Modifier and Type	Method and Description
abstract Object	construct() Compute the value to be returned by the get method.
void	finished() Called on the event dispatching thread (not on the worker thread) after the construct method has returned.
Object	get() Return the value created by the construct method.
protected Object	getValue() Get the value produced by the worker thread, or null if it hasn't been constructed yet.
void	interrupt() A new method that interrupts the worker thread.
void	start() Start the worker thread.

Methods inherited from class java.lang.Object

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

Constructor Detail

WorkerThread

public WorkerThread()

Start a thread that will call the construct method and then exit.

Method Detail

construct

public abstract Object construct()

Compute the value to be returned by the get method.

finished

public void finished()

Called on the event dispatching thread (not on the worker thread) after the construct method has returned.

interrupt

public void interrupt()

A new method that interrupts the worker thread. Call this method to force the worker to abort what it's doing.

get

public Object get()

Return the value created by the construct method. Returns null if either the constructing thread or the current thread was interrupted before a value was produced.

Returns:

the value created by the construct method

getValue

protected Object getValue()

Get the value produced by the worker thread, or null if it hasn't been constructed yet.

start

public void start()

Start the worker thread.