org.javagroups.util
Class Promise
java.lang.Object
|
+--org.javagroups.util.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.
Method Summary |
java.lang.Object |
checkForResult()
Checks whether result is available. |
java.lang.Object |
getResult(long timeout)
Gets result. |
void |
reset()
Causes all waiting threads to return |
void |
setResult(java.lang.Object obj)
Sets the result and notifies any threads waiting for it |
java.lang.String |
toString()
|
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Promise
public Promise()
getResult
public java.lang.Object getResult(long timeout)
- Gets result. If result was already submitted, returns it immediately (resetting it), else blocks until
results get available.
- Parameters:
timeout
- Max time to wait for result. If it is 0, we wait indefinitely
checkForResult
public java.lang.Object checkForResult()
- Checks whether result is available. Does not block.
setResult
public void setResult(java.lang.Object obj)
- Sets the result and notifies any threads waiting for it
reset
public void reset()
- Causes all waiting threads to return
toString
public java.lang.String toString()
- Overrides:
toString
in class java.lang.Object
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