ix.util
Class FutureValue

java.lang.Object
  ix.util.FutureValue

Direct Known Subclasses:

SecureRandomTest.FutureRandom

public abstract class FutureValue
extends java.lang.Object

Computes a value in a separate thread. Example:

   FutureValue fv = new FutureValue("computes v") {
       public Object computeValue() {
           ...;
       }
   };
   fv.start();
   ...
   Object v = fv.getValue();
 

getValue() waits until the value is available.

Constructor Summary

FutureValue(java.lang.String name)
Construct a FutureValue that has a daemon thread for computing the value.

Method Summary

abstract java.lang.Object	computeValue()
java.lang.Object	getValue() Returns the computed value once it is available.
boolean	isReady()
void	start() Start the thread that will compute the value.
void	waitUntilReady(long timeout)

Methods inherited from class java.lang.Object

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

Constructor Detail

FutureValue

public FutureValue(java.lang.String name)

Construct a FutureValue that has a daemon thread for computing the value. This is normally called for a subclass that defines the computeValue() method.

Method Detail

start

public void start()

Start the thread that will compute the value.

getValue

public java.lang.Object getValue()

Returns the computed value once it is available.

Throws:

RethrownException - if the computation of the value threw and error or exception.

waitUntilReady

public void waitUntilReady(long timeout)

isReady

public boolean isReady()

computeValue

public abstract java.lang.Object computeValue()