public synchronized void getHyperSpaceMeem(AsyncCallback<Meem> callback) {
if (hyperSpaceMeem == null) {
synchronized (hyperSpaceMeemCallbacks) {
hyperSpaceMeemCallbacks.add(callback);
}
} else {
callback.result(hyperSpaceMeem);
}
}
/**
* Place an Object into the PigeonHole. If the PigeonHole is full, then wait until it is emptied.
*
* @param pigeon Object to be placed in the PigeonHole
*/
public synchronized void put(T pigeon) {
if (received) {
throw new RuntimeException("Pigeons may only be used once!");
}
this.received = true;
this.pigeon = pigeon;
for (AsyncCallback<T> callback : callbacks) {
callback.result(pigeon);
}
this.notify();
}
/**
* Asynchronous and preferred way to get Hyperspace.
*
* @param callback
*/
public synchronized void getHyperSpace(final AsyncCallback<HyperSpace> callback) {
if (hyperSpace == null && hyperSpaceMeem != null) {
ReferenceHelper.getTarget(
getHyperSpaceMeem(),
"hyperSpace",
HyperSpace.class,
new AsyncCallback<HyperSpace>() {
public void result(HyperSpace result) {
hyperSpace = result;
callback.result(result);
};
public void exception(Exception e) {
callback.exception(e);
}
});
} else {
callback.result(hyperSpace);
}
}
/** @param callback */
public synchronized void get(final AsyncCallback<T> callback) {
if (pigeon != null) {
callback.result(pigeon);
} else if (exception != null) {
callback.exception(exception);
} else {
this.callbacks.add(callback);
// check for timeouts
final Task timeoutTask =
ThreadManager.spi
.create()
.queue(
new Runnable() {
public void run() {
synchronized (PigeonHole.this) {
callbacks.remove(callback);
callback.exception(new TimeoutException());
}
}
},
System.currentTimeMillis() + timeout);
if (timeoutTask != null) {
this.callbacks.add(
new AsyncCallback<T>() {
public void result(T result) {
timeoutTask.cancel();
}
public void exception(Exception e) {
timeoutTask.cancel();
}
});
}
}
}