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

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

Registers a {@link Listener} to be {@linkplain Executor#execute executed} on the givenexecutor. The listener will have the corresponding transition method called whenever the service changes state. The listener will not have previous state changes replayed, so it is suggested that listeners are added before the service starts.

There is no guaranteed ordering of execution of listeners, but any listener added through this method is guaranteed to be called whenever there is a state change.

Exceptions thrown by a listener will be propagated up to the executor. Any exception thrown during {@code Executor.execute} (e.g., a {@code RejectedExecutionException} or an exceptionthrown by {@linkplain MoreExecutors#sameThreadExecutor inline execution}) will be caught and logged. @param listener the listener to run when the service changes state is complete @param executor the executor in which the listeners callback methods will be run. For fast,lightweight listeners that would be safe to execute in any thread, consider {@link MoreExecutors#sameThreadExecutor}. @since 13.0

      controller.stop().get(2, TimeUnit.SECONDS);


      Assert.assertEquals(ServiceController.State.TERMINATED, controller.state());


      final CountDownLatch terminateLatch = new CountDownLatch(1);
      service.addListener(new ServiceListenerAdapter() {
        @Override
        public void terminated(Service.State from) {
          terminateLatch.countDown();
        }
      }, Threads.SAME_THREAD_EXECUTOR);

      controller.stop().get(2, TimeUnit.SECONDS);


      Assert.assertEquals(ServiceController.State.TERMINATED, controller.state());


      final CountDownLatch terminateLatch = new CountDownLatch(1);
      service.addListener(new ServiceListenerAdapter() {
        @Override
        public void terminated(Service.State from) {
          terminateLatch.countDown();
        }
      }, Threads.SAME_THREAD_EXECUTOR);

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