@Test
public void testOverSubscribed() throws Exception {
final Timing timing = new Timing();
final CuratorFramework client =
CuratorFrameworkFactory.newClient(
server.getConnectString(), timing.session(), timing.connection(), new RetryOneTime(1));
ExecutorService service = Executors.newCachedThreadPool();
ExecutorCompletionService<Void> completionService =
new ExecutorCompletionService<Void>(service);
try {
client.start();
final Semaphore semaphore = new Semaphore(0);
final CountDownLatch latch = new CountDownLatch(1);
for (int i = 0; i < (QTY + 1); ++i) {
completionService.submit(
new Callable<Void>() {
@Override
public Void call() throws Exception {
DistributedDoubleBarrier barrier =
new DistributedDoubleBarrier(client, "/barrier", QTY) {
@Override
protected List<String> getChildrenForEntering() throws Exception {
semaphore.release();
Assert.assertTrue(timing.awaitLatch(latch));
return super.getChildrenForEntering();
}
};
Assert.assertTrue(barrier.enter(timing.seconds(), TimeUnit.SECONDS));
Assert.assertTrue(barrier.leave(timing.seconds(), TimeUnit.SECONDS));
return null;
}
});
}
Assert.assertTrue(
semaphore.tryAcquire(
QTY + 1,
timing.seconds(),
TimeUnit.SECONDS)); // wait until all QTY+1 barriers are trying to enter
latch.countDown();
for (int i = 0; i < (QTY + 1); ++i) {
completionService.take().get(); // to check for assertions
}
} finally {
service.shutdown();
Closeables.close(client, true);
}
}
