Examples of com.google.common.util.concurrent.Service.stop()

com.google.common.util.concurrent.Service.stop()

If the service is {@linkplain State#STARTING starting} or {@linkplain State#RUNNING running}, this initiates service shutdown and returns immediately. If the service is {@linkplain State#NEW new}, it is {@linkplain State#TERMINATED terminated} without having been started norstopped. If the service has already been stopped, this method returns immediately without taking action. @return a future for the shutdown result, regardless of whether this callinitiated shutdown. Calling {@link ListenableFuture#get} will blockuntil the service has finished shutting down, and either returns {@link State#TERMINATED} or throws an {@link ExecutionException}. If it has already finished stopping, {@link ListenableFuture#get} returnsimmediately. Cancelling this future is unsupported and always returns {@code false}.

      service.start();


      Assert.assertTrue(runLatch.await(2, TimeUnit.SECONDS));
      Assert.assertFalse(stopLatch.await(2, TimeUnit.SECONDS));


      service.stop();


      Assert.assertTrue(stopLatch.await(2, TimeUnit.SECONDS));


    } finally {
      zkServer.stopAndWait();

  public void testCompletion() throws ExecutionException, InterruptedException {
    Service service = new DummyService("s1", new AtomicBoolean());
    ListenableFuture<Service.State> completion = Services.getCompletionFuture(service);


    service.start();
    service.stop();


    completion.get();


    AtomicBoolean transiting = new AtomicBoolean();
    service = new DummyService("s2", transiting);

    service = new DummyService("s2", transiting);
    completion = Services.getCompletionFuture(service);


    service.startAndWait();
    transiting.set(true);
    service.stop();


    try {
      completion.get();
      Assert.assertTrue(false);
    } catch (ExecutionException e) {

      service.start();


      Assert.assertTrue(runLatch.await(2, TimeUnit.SECONDS));
      Assert.assertFalse(stopLatch.await(2, TimeUnit.SECONDS));


      service.stop();


      Assert.assertTrue(stopLatch.await(2, TimeUnit.SECONDS));


    } finally {
      zkServer.stopAndWait();

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