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Java Source Code / Java Documentation » Science » Cougaar12_4 » org.cougaar.util

Source Cross Reference

Class Diagram

Java Document (Java Doc)

java.lang .Object

org.cougaar.util .FutureResult

FutureResult

public class FutureResult (Code)

A container that allows one thread to wait for the processing result of a parallel thread.

Typically one thread calls "get()" to block for the result, and another thread, possibly queued, does the work and eventually calls "set(...)" to unblock the waiter.

This is a copy of Doug Lea's public domain "FutureResult" class:
EDU/oswego/cs/dl/util/concurrent/FutureResult.java
For some reason it was not included in JDK 1.5's "java.util.concurrent" package.

Inner Class :public static class TimeoutException extends InterruptedException

Field Summary
protected InvocationTargetException	exception_
protected boolean	ready_
protected Object	value_

Constructor Summary
public	FutureResult()

Method Summary
public synchronized void	clear()
protected Object	doGet()
public synchronized Object	get()
public synchronized InvocationTargetException	getException()
public synchronized boolean	isReady()
public synchronized Object	peek()
public synchronized void	set(Object newValue)
public synchronized void	setException(Throwable ex) Set an exception result and notify the waiters.
public synchronized Object	timedGet(long msecs) Wait at most "msecs" milliseconds for the result, otherwise throw a TimeoutException.

Field Detail

exception_
protected InvocationTargetException exception_(Code)

ready_
protected boolean ready_(Code)

value_
protected Object value_(Code)

Constructor Detail

FutureResult
public FutureResult()(Code)

Method Detail

clear
public synchronized void clear()(Code)

doGet
protected Object doGet() throws InvocationTargetException(Code)

get
public synchronized Object get() throws InterruptedException, InvocationTargetException(Code)
	Wait until the result is ready and get it

getException
public synchronized InvocationTargetException getException()(Code)

isReady
public synchronized boolean isReady()(Code)

peek
public synchronized Object peek()(Code)

set
public synchronized void set(Object newValue)(Code)
	Set a non-exception result and notify the waiters

setException
public synchronized void setException(Throwable ex)(Code)
	Set an exception result and notify the waiters.

timedGet
public synchronized Object timedGet(long msecs) throws TimeoutException, InterruptedException, InvocationTargetException(Code)
	Wait at most "msecs" milliseconds for the result, otherwise throw a TimeoutException.

Methods inherited from java.lang.Object

native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc)
public boolean equals(Object obj)(Code)(Java Doc)
protected void finalize() throws Throwable(Code)(Java Doc)
final native public Class getClass()(Code)(Java Doc)
native public int hashCode()(Code)(Java Doc)
final native public void notify()(Code)(Java Doc)
final native public void notifyAll()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc)
final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc)
final public void wait() throws InterruptedException(Code)(Java Doc)

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