org.jgroups.util
Class Promise
public class Promise
extends java.lang.Object
Allows a thread to submit an asynchronous request and to wait for the result. The caller may choose to check
for the result at a later time, or immediately and it may block or not. Both the caller and responder have to
know the promise.
Object | getResult()
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Object | getResult(long timeout) - Returns the result, but never throws a TimeoutException; returns null instead.
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Object | getResultWithTimeout(long timeout) - Blocks until a result is available, or timeout milliseconds have elapsed
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boolean | hasResult() - Checks whether result is available.
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void | reset() - Causes all waiting threads to return
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void | setResult(Object obj) - Sets the result and notifies any threads
waiting for it
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String | toString()
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getResult
public Object getResult()
getResult
public Object getResult(long timeout)
Returns the result, but never throws a TimeoutException; returns null instead.
getResultWithTimeout
public Object getResultWithTimeout(long timeout)
throws TimeoutException
Blocks until a result is available, or timeout milliseconds have elapsed
hasResult
public boolean hasResult()
Checks whether result is available. Does not block.
reset
public void reset()
Causes all waiting threads to return
setResult
public void setResult(Object obj)
Sets the result and notifies any threads
waiting for it
toString
public String toString()
Copyright B) 1998-2005 Bela Ban. All Rights Reserved.