WitnessNotificationListener listener = listeners.get(entry.getKey());
                if (listener != null) {
                    try {
                        listener.onWitnessNotification(notification);
                    } catch (Exception e) {
                        log.error("Error in witness notification listener", e);
                    }
                }
            }

    RecordingListener listener = new RecordingListener();
    manager.addListener(listener, directExecutor());
    manager.startAsync().awaitHealthy();
    assertTrue(manager.isHealthy());
    assertTrue(listener.healthyCalled);
    assertFalse(listener.stoppedCalled);
    assertTrue(listener.failedServices.isEmpty());
    manager.stopAsync().awaitStopped();

  QueuingRemovalListener<Object, Object> listener;

  @Override
  protected void setUp() {
    listener = queuingRemovalListener();
  }

  public void testGet() {
    Object computed = new Object();
    LoadingCache<Object, Object> cache =
        CacheBuilder.newBuilder()
            .maximumSize(0)
            .removalListener(listener)
            .build(constantLoader(computed));

  QueuingRemovalListener<Object, Object> listener;

  @Override
  protected void setUp() {
    listener = queuingRemovalListener();
  }

  public void testGet() {
    Object computed = new Object();
    LoadingCache<Object, Object> cache =
        CacheBuilder.newBuilder()
            .maximumSize(0)
            .removalListener(listener)
            .build(constantLoader(computed));

  }

  /**
   * Verify that the listener completes in a reasonable amount of time, and Asserts that the future
   * returns the expected data.
   *
   * @throws Throwable if the listener isn't called or if it resulted in a throwable or if the
   *     result doesn't match the expected value.
   */
  public void assertSuccess(Object expectedData) throws Throwable {
    // Verify that the listener executed in a reasonable amount of time.

     */
    @Override
    public void pitSegments(final PitSegmentsRequest pitSegmentsRequest, final ActionListener<IndicesSegmentResponse> listener) {
        client.pitSegments(pitSegmentsRequest, listener);
    }

    /**
     * Searches a view asynchronously (not implemented).
     *
     * @param request  the search view request
     * @param listener the response listener

     */
    @JvmStatic
    @JvmName("enqueue")
    fun Call.enqueueEventSource(listener: EventSourceListener): EventSource = RealEventSource(this, listener).also(this::enqueue)

    /**
     * Processes the existing response with [listener].
     */
    @JvmStatic
    @JvmName("process")

![Events Diagram](../assets/images/******@****.***)

Here’s a [sample event listener](https://github.com/square/okhttp/blob/master/samples/guide/src/main/java/okhttp3/recipes/PrintEventsNonConcurrent.java) that prints each event with a timestamp.

```java
class PrintingEventListener extends EventListener {

    val response = call.execute()
    assertThat(response.code).isEqualTo(200)
    response.body.close()
    listener.removeUpToEvent(ConnectionEvent.ConnectEnd::class.java)
    listener.removeUpToEvent(ConnectionEvent.ConnectionReleased::class.java)
    listener.removeUpToEvent(ConnectionEvent.ConnectionAcquired::class.java)
    listener.removeUpToEvent(ConnectionEvent.ConnectionReleased::class.java)
  }

  @Test

                events.add(transferEvent);
            }
        }

        TransferListener listener = new TransferListener();
        wagonManager.getArtifact(artifact, repos, listener, false);
        assertEquals(1, listener.events.size());
    }

    @Test
    void testGetMissingJar() throws TransferFailedException, UnsupportedProtocolException, IOException {