Example usage for java.util.concurrent CountDownLatch countDown

Introduction

In this page you can find the example usage for java.util.concurrent CountDownLatch countDown.

Prototype

public void countDown() 

Source Link

Document

Decrements the count of the latch, releasing all waiting threads if the count reaches zero.

Usage

From source file:com.sixt.service.framework.kafka.messaging.KafkaFailoverIntegrationTest.java

@Ignore
@Test//from  w w  w .j a v a 2s  .  c o m
public void consumerSubscribesToNonExistingTopic() throws InterruptedException {
    ServiceProperties serviceProperties = fillServiceProperties();

    Topic cruft = new Topic("krufty");

    CountDownLatch latch = new CountDownLatch(1);

    Consumer consumer = consumerFactoryWithHandler(serviceProperties, SayHelloToCmd.class,
            new MessageHandler<SayHelloToCmd>() {
                @Override
                public void onMessage(Message<SayHelloToCmd> message, OrangeContext context) {
                    latch.countDown();
                }
            }).consumerForTopic(cruft, new DiscardFailedMessages());

    Producer producer = new ProducerFactory(serviceProperties).createProducer();

    String key = RandomStringUtils.randomAscii(5);
    SayHelloToCmd payload = SayHelloToCmd.newBuilder().setName(key).build();

    Message request = Messages.requestFor(cruft, cruft, key, payload, new OrangeContext());

    producer.send(request);

    assertTrue(latch.await(1, TimeUnit.MINUTES));
    producer.shutdown();
    consumer.shutdown();

    // Results:
    // 1.) WITH topic auto creation i.e. KAFKA_AUTO_CREATE_TOPICS_ENABLE = true
    // All ok, needs to discover coordinator etc.
    // 2.) NO topic auto creation i.e. KAFKA_AUTO_CREATE_TOPICS_ENABLE = false
    //2017-04-12 18:27:16,701 [pool-9-thread-1] INFO  c.s.s.f.kafka.messaging.Consumer - Consumer in group kruftmeister-com.sixt.service.unknown subscribed to topic kruftmeister
    //2017-04-12 18:27:16,852 [pool-9-thread-1] WARN  o.apache.kafka.clients.NetworkClient - Error while fetching metadata with correlation id 1 : {kruftmeister=UNKNOWN_TOPIC_OR_PARTITION}
    //2017-04-12 18:27:18,876 [pool-9-thread-1] WARN  o.apache.kafka.clients.NetworkClient - Error while fetching metadata with correlation id 40 : {kruftmeister=UNKNOWN_TOPIC_OR_PARTITION}
    //2017-04-12 18:27:18,889 [pool-9-thread-1] INFO  o.a.k.c.c.i.AbstractCoordinator - Discovered coordinator 172.19.0.3:9092 (id: 2147482646 rack: null) for group kruftmeister-com.sixt.service.unknown.
    //2017-04-12 18:27:18,892 [pool-9-thread-1] INFO  o.a.k.c.c.i.ConsumerCoordinator - Revoking previously assigned partitions [] for group kruftmeister-com.sixt.service.unknown
    //2017-04-12 18:27:18,894 [pool-9-thread-1] DEBUG c.s.s.f.kafka.messaging.Consumer - ConsumerRebalanceListener.onPartitionsRevoked on []
    //2017-04-12 18:27:18,917 [pool-9-thread-1] INFO  o.a.k.c.c.i.AbstractCoordinator - (Re-)joining group kruftmeister-com.sixt.service.unknown
    //2017-04-12 18:27:18,937 [pool-9-thread-1] INFO  o.a.k.c.c.i.AbstractCoordinator - Marking the coordinator 172.19.0.3:9092 (id: 2147482646 rack: null) dead for group kruftmeister-com.sixt.service.unknown
    //2017-04-12 18:27:19,041 [pool-9-thread-1] INFO  o.a.k.c.c.i.AbstractCoordinator - Discovered coordinator 172.19.0.3:9092 (id: 2147482646 rack: null) for group kruftmeister-com.sixt.service.unknown.
    //2017-04-12 18:27:19,041 [pool-9-thread-1] INFO  o.a.k.c.c.i.AbstractCoordinator - (Re-)joining group kruftmeister-com.sixt.service.unknown
    //2017-04-12 18:27:19,135 [pool-9-thread-1] INFO  o.a.k.c.c.i.AbstractCoordinator - Successfully joined group kruftmeister-com.sixt.service.unknown with generation 1
    //2017-04-12 18:27:19,135 [pool-9-thread-1] INFO  o.a.k.c.c.i.ConsumerCoordinator - Setting newly assigned partitions [] for group kruftmeister-com.sixt.service.unknown
    //2017-04-12 18:27:19,135 [pool-9-thread-1] DEBUG c.s.s.f.kafka.messaging.Consumer - ConsumerRebalanceListener.onPartitionsAssigned on []
    // -> assigned to a topic with no partitions?
}

---

From source file:io.fabric8.kubernetes.client.dsl.internal.RollingUpdater.java

/**
 * Since k8s v1.4.x, rc/rs deletes are asynchronous.
 * Lets wait until the resource is actually deleted in the server
 *//*ww  w  .j a v  a  2  s.  co  m*/
private void waitUntilDeleted(final String namespace, final String name) {
    final CountDownLatch countDownLatch = new CountDownLatch(1);

    final Runnable waitTillDeletedPoller = new Runnable() {
        public void run() {
            try {
                T res = resources().inNamespace(namespace).withName(name).get();
                if (res == null) {
                    countDownLatch.countDown();
                }
            } catch (KubernetesClientException e) {
                if (e.getCode() == 404) {
                    countDownLatch.countDown();
                }
            }
        }
    };

    ScheduledExecutorService executor = Executors.newSingleThreadScheduledExecutor();
    ScheduledFuture poller = executor.scheduleWithFixedDelay(waitTillDeletedPoller, 0, 5, TimeUnit.SECONDS);
    ScheduledFuture logger = executor.scheduleWithFixedDelay(new Runnable() {
        @Override
        public void run() {
            LOG.debug("Found resource {}/{} not yet deleted on server, so waiting...", namespace, name);
        }
    }, 0, loggingIntervalMillis, TimeUnit.MILLISECONDS);
    try {
        countDownLatch.await(DEFAULT_SERVER_GC_WAIT_TIMEOUT, TimeUnit.MILLISECONDS);
        executor.shutdown();
    } catch (InterruptedException e) {
        poller.cancel(true);
        logger.cancel(true);
        executor.shutdown();
        LOG.warn("Still found deleted resource {} in namespace: {}  after waiting for {} seconds so giving up",
                name, namespace, TimeUnit.MILLISECONDS.toSeconds(DEFAULT_SERVER_GC_WAIT_TIMEOUT));
    }
}

---

From source file:info.archinnov.achilles.it.TestAsyncDSLSimpleEntity.java

@Test
public void should_dsl_delete_async() throws Exception {
    //Given/*from w  ww . java  2 s. com*/
    final long id = RandomUtils.nextLong(0L, Long.MAX_VALUE);
    final Date date = buildDateKey();
    scriptExecutor.executeScriptTemplate("SimpleEntity/insert_single_row.cql",
            ImmutableMap.of("id", id, "table", "simple"));

    final CountDownLatch latch = new CountDownLatch(1);
    final CassandraLogAsserter logAsserter = new CassandraLogAsserter();
    logAsserter.prepareLogLevel(ASYNC_LOGGER_STRING, "%msg - [%thread]%n");

    //When
    manager.dsl().delete().consistencyList().simpleMap().fromBaseTable().where().id_Eq(id).date_Eq(date)
            .withResultSetAsyncListener(rs -> {
                LOGGER.info(CALLED);
                latch.countDown();
                return rs;
            }).withTracing().executeAsync();

    //Then
    latch.await();
    logAsserter.assertContains("Called - ");
}

---

From source file:de.jackwhite20.japs.client.cache.impl.PubSubCacheImpl.java

@Override
public Future<Boolean> has(String key) {

    if (key == null || key.isEmpty()) {
        throw new IllegalArgumentException("key cannot be null or empty");
    }//from  ww w  . j ava 2  s .  c  o  m

    return executorService.submit(() -> {

        int id = CALLBACK_COUNTER.getAndIncrement();

        AtomicBoolean has = new AtomicBoolean(false);

        CountDownLatch countDownLatch = new CountDownLatch(1);

        callbacks.put(id, new Consumer<JSONObject>() {

            @Override
            public void accept(JSONObject jsonObject) {

                has.set(jsonObject.getBoolean("has"));

                countDownLatch.countDown();
            }
        });

        JSONObject jsonObject = new JSONObject().put("op", OpCode.OP_CACHE_HAS.getCode()).put("key", key)
                .put("id", id);

        write(jsonObject);

        countDownLatch.await();

        return has.get();
    });
}

---

From source file:org.red5.server.service.ShutdownServer.java

private void shutdownOrderly() {
    // shutdown internal listener
    shutdown.compareAndSet(false, true);
    // shutdown the plug-in launcher
    try {//from   w w w.  j a  va 2 s  .  c  o  m
        log.debug("Attempting to shutdown plugin registry");
        PluginRegistry.shutdown();
    } catch (Exception e) {
        log.warn("Exception shutting down plugin registry", e);
    }
    // shutdown the context loader
    if (contextLoader != null) {
        log.debug("Attempting to shutdown context loader");
        contextLoader.shutdown();
        contextLoader = null;
    }
    // shutdown the jee server
    LoaderBase jeeServer = applicationContext.getBean(LoaderBase.class);
    if (jeeServer != null) {
        // destroy is a DisposibleBean method not LoaderBase
        // jeeServer.destroy();
        jeeServer = null;
    }
    // attempt to kill the contexts
    final CountDownLatch latch = new CountDownLatch(3);
    new Thread(new Runnable() {
        public void run() {
            try {
                log.debug("Attempting to close core context");
                ((ConfigurableApplicationContext) coreContext).close();
                latch.countDown();
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }).start();
    new Thread(new Runnable() {
        public void run() {
            try {
                log.debug("Attempting to close common context");
                ((ConfigurableApplicationContext) commonContext).close();
                latch.countDown();
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }).start();
    new Thread(new Runnable() {
        public void run() {
            try {
                log.debug("Attempting to close app context");
                ((ConfigurableApplicationContext) applicationContext).close();
                latch.countDown();
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }).start();
    try {
        if (latch.await(shutdownDelay, TimeUnit.SECONDS)) {
            log.info("Application contexts are closed");
        } else {
            log.info("One or more contexts didn't close in the allotted time");
        }
    } catch (InterruptedException e) {
        log.error("Exception attempting to close app contexts", e);
    }
    // exit
    System.exit(0);
}

---

From source file:com.vmware.photon.controller.api.client.resource.ImagesApiTest.java

@Test
public void testGetAllImagesAsync() throws IOException, InterruptedException {
    Image image1 = new Image();
    image1.setId("image1");

    Image image2 = new Image();
    image2.setId("image2");

    final ResourceList<Image> imageResourceList = new ResourceList<>(Arrays.asList(image1, image2));

    ObjectMapper mapper = new ObjectMapper();
    String serializedTask = mapper.writeValueAsString(imageResourceList);

    setupMocks(serializedTask, HttpStatus.SC_OK);

    ImagesApi imagesApi = new ImagesApi(this.restClient);

    final CountDownLatch latch = new CountDownLatch(1);

    imagesApi.getImagesAsync(new FutureCallback<ResourceList<Image>>() {
        @Override/*ww  w  . jav  a 2  s .c om*/
        public void onSuccess(@Nullable ResourceList<Image> result) {
            assertEquals(result.getItems(), imageResourceList.getItems());
            latch.countDown();
        }

        @Override
        public void onFailure(Throwable t) {
            fail(t.toString());
            latch.countDown();
        }
    });

    assertThat(latch.await(COUNTDOWNLATCH_AWAIT_TIMEOUT, TimeUnit.SECONDS), is(true));

}

---

From source file:com.vmware.photon.controller.api.client.resource.ImagesRestApiTest.java

@Test
public void testGetAllImagesAsync() throws IOException, InterruptedException {
    Image image1 = new Image();
    image1.setId("image1");

    Image image2 = new Image();
    image2.setId("image2");

    final ResourceList<Image> imageResourceList = new ResourceList<>(Arrays.asList(image1, image2));

    ObjectMapper mapper = new ObjectMapper();
    String serializedTask = mapper.writeValueAsString(imageResourceList);

    setupMocks(serializedTask, HttpStatus.SC_OK);

    ImagesApi imagesApi = new ImagesRestApi(this.restClient);

    final CountDownLatch latch = new CountDownLatch(1);

    imagesApi.getImagesAsync(new FutureCallback<ResourceList<Image>>() {
        @Override// www . j  a  v  a  2s  .co m
        public void onSuccess(@Nullable ResourceList<Image> result) {
            assertEquals(result.getItems(), imageResourceList.getItems());
            latch.countDown();
        }

        @Override
        public void onFailure(Throwable t) {
            fail(t.toString());
            latch.countDown();
        }
    });

    assertThat(latch.await(COUNTDOWNLATCH_AWAIT_TIMEOUT, TimeUnit.SECONDS), is(true));

}

---

From source file:fi.jumi.core.stdout.OutputCapturerTest.java

/**
 * {@link Throwable#printStackTrace} synchronizes on {@code System.err}, but it can still interleave with something
 * that is printed to {@code System.out}. We can fix that by synchronizing all printing on {@code System.err}, but
 * only in one direction; the output from {@code Throwable.printStackTrace(System.out)} may still interleave with
 * printing to {@code System.err}.//from  ww  w .  j a v a2 s. c o  m
 */
@Test
public void printing_a_stack_trace_to_stderr_and_normally_to_stdout_concurrently() throws Exception {
    CountDownLatch isPrintingToOut = new CountDownLatch(1);
    CountDownLatch hasPrintedStackTrace = new CountDownLatch(1);
    Exception exception = new Exception("dummy exception");
    CombinedOutput combinedOutput = new CombinedOutput();
    capturer.captureTo(combinedOutput);

    runConcurrently(() -> {
        await(isPrintingToOut);
        exception.printStackTrace(capturer.err());
        hasPrintedStackTrace.countDown();
    }, () -> {
        while (hasPrintedStackTrace.getCount() > 0) {
            capturer.out().println("*garbage*");
            isPrintingToOut.countDown();
        }
    });

    assertThat(combinedOutput.toString(), containsString(Throwables.getStackTraceAsString(exception)));
}

---

From source file:info.archinnov.achilles.it.TestAsyncCRUDSimpleEntity.java

@Test
public void should_find_by_id_async() throws Exception {
    //Given/*w w w. ja  va  2s . c  o  m*/
    final long id = RandomUtils.nextLong(0, Long.MAX_VALUE);
    scriptExecutor.executeScriptTemplate("SimpleEntity/insert_single_row.cql",
            ImmutableMap.of("id", id, "table", "simple"));
    final Date date = buildDateKey();

    final CountDownLatch latch = new CountDownLatch(1);
    final CassandraLogAsserter logAsserter = new CassandraLogAsserter();
    logAsserter.prepareLogLevel(ASYNC_LOGGER_STRING, "%msg - [%thread]%n");

    //When
    final CompletableFuture<Tuple2<SimpleEntity, ExecutionInfo>> tuple2 = manager.crud().findById(id, date)
            .withResultSetAsyncListener(rs -> {
                LOGGER.info(CALLED);
                latch.countDown();
                return rs;
            }).getAsyncWithStats();

    //Then
    latch.await();
    final SimpleEntity actual = tuple2.get()._1();
    final ExecutionInfo executionInfo = tuple2.get()._2();

    assertThat(actual).isNotNull();
    assertThat(actual.getConsistencyList()).containsExactly(ConsistencyLevel.QUORUM,
            ConsistencyLevel.LOCAL_ONE);
    assertThat(executionInfo.getQueriedHost().isUp()).isTrue();

    logAsserter.assertContains("Called - [achilles-default-executor");
}

---

From source file:de.taimos.httputils.Tester1.java

/**
 * //  w  w  w . ja  va 2s.  c o m
 */
@Test
public void testGetAsync() throws InterruptedException {
    final CountDownLatch cdl = new CountDownLatch(1);
    WS.url("http://www.heise.de").getAsync(new HTTPResponseCallback() {

        @Override
        public void response(HttpResponse response) {
            Assert.assertEquals(WS.getStatus(response), 200);
            Assert.assertTrue(WS.isStatusOK(response));
            final String body = WS.getResponseAsString(response);
            Assert.assertNotNull(body);
            Assert.assertFalse(body.isEmpty());
            cdl.countDown();
        }

        @Override
        public void fail(Exception e) {
            System.out.println(e);
        }
    });
    Assert.assertTrue(cdl.await(10, TimeUnit.SECONDS));
}

---

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