In the situation where one retrieves some kind of artifact from a
component, what is the validity of that artifact?
For example:
public interface Worker {
public void work();
}
public interface WorkerManager {
public static final String ROLE = ...;
// Never returns null, never fails.
public Worker getWorker ();
}
Case 1: This should work.
WorkerManager wm = null;
try {
wm = (WorkerManager)
manager.lookup (WorkerManager.ROLE);
Worker w = wm.getWorker ();
w.work();
} finally {
manager.release (wm);
}
Case 2: Should this work?
WorkerManager wm = null;
Worker w = null;
try {
wm = (WorkerManager)
manager.lookup (WorkerManager.ROLE);
w = wm.getWorker ();
} finally {
manager.release (wm);
}
w.work(); // Use of artifact after having released
// source component.
So is the validity:
1. Guaranteed while the source component is unreleased?
2. Guaranteed for ever?
3. Not guaranteed at all?
4. See component docs.
/LS
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