private void assertCacheInvalidAndWithCanceledRM() {
Assert.assertFalse(fTestCache.isValid());
try {
fTestCache.getData();
Assert.fail("Expected an IllegalStateException");
} catch (IllegalStateException e) {
}
try {
fTestCache.getError();
Assert.fail("Expected an IllegalStateException");
} catch (IllegalStateException e) {
}
Assert.assertTrue(fRetrieveRm.isCanceled());
}
/**
* This test forces a race condition where a client that requested data cancels. While shortly
* after a second client starts a new request. The first request's cancel should not interfere
* with the second request.
*/
public void testCancelAfterCompletedRaceCondition()
throws InterruptedException, ExecutionException {
// Create a client request with a badly behaved cancel implementation.
final Callback[] rmBad = new Callback[1];
final boolean qBadCanceled[] = new boolean[] {false};
Query<Integer> qBad =
new Query<Integer>() {
@Override
protected void execute(final DataCallback<Integer> rm) {
rmBad[0] =
new Callback(rm) {
@Override
public synchronized void removeCancelListener(ICanceledListener listener) {
// Do not add the cancel listener so that the cancel request is not
// propagated to the cache.
}
@Override
public void cancel() {
if (qBadCanceled[0]) {
super.cancel();
}
}
@Override
public synchronized boolean isCanceled() {
return qBadCanceled[0];
}
@Override
public synchronized void done() {
// Avoid clearing cancel listeners list
};
@Override
protected void handleSuccess() {
rm.setData(fTestCache.getData());
rm.done();
};
};
fTestCache.wait(rmBad[0]);
}
};
qBad.invoke();
// Wait until the cache starts data retrieval.
waitForRetrieveRm();
// Reset the cache
Protocol.invokeAndWait(
new Runnable() {
public void run() {
fRetrieveRm = null;
fTestCache.set(null, null, true);
fTestCache.reset();
}
});
Query<Integer> qGood = new TestQuery();
qGood.invoke();
// Wait until the cache starts data retrieval.
waitForRetrieveRm();
qBadCanceled[0] = true;
rmBad[0].cancel();
Assert.assertFalse(fRetrieveRm.isCanceled());
// Completed the retrieve RM
Protocol.invokeAndWait(
new Runnable() {
public void run() {
fRetrieveRm.setData(1);
fRetrieveRm.done();
}
});
qGood.get();
assertCacheValidWithData(1);
}
public void testCancelWhilePendingWithoutClientNotification()
throws InterruptedException, ExecutionException {
final boolean canceledCalled[] = new boolean[] {false};
fTestCache =
new TestCache() {
protected synchronized void canceled() {
canceledCalled[0] = true;
};
};
// Request data from cache
Query<Integer> q =
new Query<Integer>() {
@Override
protected void execute(final DataCallback<Integer> rm) {
fTestCache.wait(
new Callback(rm) {
@Override
public synchronized void addCancelListener(ICanceledListener listener) {
// Do not add the cancel listener so that the cancel request is not
// propagated to the cache.
}
@Override
protected void handleSuccess() {
rm.setData(fTestCache.getData());
rm.done();
}
});
}
};
q.invoke();
// Wait until the cache starts data retrieval.
waitForRetrieveRm();
// Cancel the client request
q.cancel(true);
assertCacheInvalidAndWithCanceledRM();
// AbstractCache.canceled() should be called after isCanceled()
// discovers that the client has canceled its request. The canceled() method is
// called in a separate dispatch cycle, so we have to wait one cycle of the executor
// after is canceled is called.
fRetrieveRm.isCanceled();
Protocol.invokeAndWait(
new Runnable() {
public void run() {}
});
Assert.assertTrue(canceledCalled[0]);
try {
q.get();
Assert.fail("Expected a cancellation exception");
} catch (CancellationException e) {
} // Expected exception;
// Completed the retrieve RM
Protocol.invokeAndWait(
new Runnable() {
public void run() {
fRetrieveRm.setData(1);
fRetrieveRm.done();
}
});
// Validate that cache didn't accept the result after its RM was canceled
assertCacheInvalidAndWithCanceledRM();
}