* 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 nor
   * stopped. If the service has already been stopped, this method returns immediately without
   * taking action.
   *
   * @return this
   * @since 15.0
   */
  @CanIgnoreReturnValue
  Service stopAsync();

  /**

      new ListenerCallQueue.Event<Listener>() {
        @Override
        public void call(Listener listener) {
          listener.stopped();
        }

        @Override
        public String toString() {
          return "stopped()";
        }
      };

  /**
   * A listener for the aggregate state changes of the services that are under management. Users

    private FileLockCommunicator communicator;
    private ManagedExecutor fileLockRequestListener;
    private ManagedExecutor unlockActionExecutor;
    private boolean stopped;

    public DefaultFileLockContentionHandler(ExecutorFactory executorFactory, InetAddressProvider inetAddressProvider) {
        this.executorFactory = executorFactory;
        this.inetAddressProvider = inetAddressProvider;

        e.message == 'Cannot create outgoing dispatch, as <hub> has been stopped.'
    }

    def "cannot add handler after stop started"() {
        when:
        hub.requestStop()
        hub.addHandler("channel", new Object())

        then:
        IllegalStateException e = thrown()
        e.message == 'Cannot add handler, as <hub> has been stopped.'
    }

    def "cannot add connection after stop started"() {

        return new ThreadHandleImpl(thread);
    }

    private void testThreadStarted(Thread thread) {
        lock.lock();
        try {
            if (stopped) {
                throw new IllegalStateException("Cannot start new threads, as this test case has been stopped.");
            }
            LOGGER.debug("Started {}", thread);
            active.add(thread);
            condition.signalAll();
        } finally {

	// used to lock the observedRecord
	observedRecordLock sync.Mutex

	metrics leaderMetricsAdapter
}

// Run starts the leader election loop. Run will not return
// before leader election loop is stopped by ctx or it has
// stopped holding the leader lease
func (le *LeaderElector) Run(ctx context.Context) {
	defer runtime.HandleCrash()
	defer func() {
		le.config.Callbacks.OnStoppedLeading()
	}()

	if !le.acquire(ctx) {

	// timerZombie is set when the timer has been stopped
	// but is still present in some P's heap.
	// Only set when timerHeaped is also set.
	// It is possible for timerModified and timerZombie to both
	// be set, meaning that the timer was modified and then stopped.
	// A timer sending to a channel may be placed in timerZombie
	// to take it out of the heap even though the timer is not stopped,
	// as long as nothing is reading from the channel.

		return count == 2, nil
	}); err != nil {
		t.Fatalf("expected forget() to be called twice, first call from w.add() and then from w.Stop() called from w.processInterval(): %v", err)
	}

	if !w.stopped {
		t.Fatal("expected the watcher to be stopped but it wasn't")
	}
}

// TestCacheWatcherDrainingNoBookmarkAfterResourceVersionSent checks if the watcher's input

    }

    /**
     * Starts the daemon, receiving connections asynchronously (i.e. returns immediately).
     *
     * @throws IllegalStateException if this daemon is already running, or has already been stopped.
     */
    public void start() {
        LOGGER.info("start() called on daemon - {}", daemonContext);
        lifecycleLock.lock();
        try {
            if (stateCoordinator != null) {

import java.util.List;

/**
 * The entry point for a daemon process.
 *
 * If the daemon hits the specified idle timeout the process will exit with 0. If the daemon encounters an internal error or is explicitly stopped (which can be via receiving a stop command, or
 * unexpected client disconnection) the process will exit with 1.
 */
public class DaemonMain extends EntryPoint {