Example usage for java.util.concurrent Executors newFixedThreadPool

List of usage examples for java.util.concurrent Executors newFixedThreadPool

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Introduction

In this page you can find the example usage for java.util.concurrent Executors newFixedThreadPool.

Prototype

public static ExecutorService newFixedThreadPool(int nThreads)

Source Link

Document

Creates a thread pool that reuses a fixed number of threads operating off a shared unbounded queue.

Usage

From source file:com.hunch.ImageManager.java

private static void startExecutor() {
    // if we already have an executor, theres no need for another one.
    if (executor != null)
        return;/*from  w  ww .  j a  va2 s. c  om*/

    if (Const.IMG_FETCH_THREADS > 1)
        executor = Executors.newFixedThreadPool(Const.IMG_FETCH_THREADS);
    else if (Const.IMG_FETCH_THREADS == 1)
        executor = Executors.newSingleThreadExecutor();
    else
        executor = Executors.newCachedThreadPool();
}

From source file:com.calclab.emite.xtesting.services.HttpConnector.java

public HttpConnector() {
    sendService = Executors.newCachedThreadPool();
    receiveService = Executors.newFixedThreadPool(1);
}

From source file:com.espertech.esper.multithread.TestMTIsolation.java

private void tryIsolated(int numThreads, int numLoops) throws Exception {
    Configuration config = SupportConfigFactory.getConfiguration();
    config.getEngineDefaults().getViewResources().setShareViews(false);
    config.addEventType("SupportBean", SupportBean.class);
    EPServiceProvider engine = EPServiceProviderManager.getDefaultProvider(config);
    engine.initialize();/*from w  w  w.j  av a 2  s  . c  om*/

    // execute
    ExecutorService threadPool = Executors.newFixedThreadPool(numThreads);
    Future future[] = new Future[numThreads];
    ReentrantReadWriteLock sharedStartLock = new ReentrantReadWriteLock();
    sharedStartLock.writeLock().lock();
    for (int i = 0; i < numThreads; i++) {
        future[i] = threadPool.submit(new IsolateUnisolateCallable(i, engine, numLoops));
    }
    Thread.sleep(100);
    sharedStartLock.writeLock().unlock();

    threadPool.shutdown();
    threadPool.awaitTermination(10, TimeUnit.SECONDS);

    for (int i = 0; i < numThreads; i++) {
        assertTrue((Boolean) future[i].get());
    }
}

From source file:org.opendaylight.sfc.sbrest.provider.task.SbRestSffTaskTest.java

@Before
public void init() {
    executorService = Executors.newFixedThreadPool(10);
}

From source file:ninja.eivind.hotsreplayuploader.files.AccountDirectoryWatcher.java

@Autowired
public AccountDirectoryWatcher(StormHandler stormHandler) {
    watchDirectories = new HashSet<>(stormHandler.getReplayDirectories());
    executor = Executors.newFixedThreadPool(watchDirectories.isEmpty() ? 1 : watchDirectories.size());
}

From source file:com.cisco.oss.foundation.monitoring.service.TestMultiService.java

@Test
public void testManyServices() throws Exception {

    MonitoringAgentFactory.getInstance().register(
            new PropertiesConfiguration(TestMultiService.class.getResource("/config.properties").getPath()));

    ExecutorService threadPool = Executors.newFixedThreadPool(10);

    int numOfServices = 1234;

    final CountDownLatch latch = new CountDownLatch(numOfServices);

    final ServiceDetails serviceDetails = new ServiceDetails("default desc", "test", "junit", 12345);
    for (int i = 0; i < numOfServices; i++) {

        final int index = i;

        threadPool.execute(new Runnable() {

            @Override/*  w ww. j  av  a 2s  .c  o  m*/
            public void run() {
                String apiName = (index % 3) + "";
                CommunicationInfo.getCommunicationInfo().transactionStarted(serviceDetails, apiName, 125);
                try {
                    Thread.sleep(2);
                } catch (InterruptedException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
                CommunicationInfo.getCommunicationInfo().transactionFinished(serviceDetails, apiName,
                        (index % 2 == 0) ? false : true, "kuku");
                latch.countDown();
            }
        });
    }

    try {
        latch.await();
    } catch (InterruptedException e) {
        e.printStackTrace();
    }

    int numberOfThreads = Thread.getAllStackTraces().keySet().size();
    Assert.assertTrue(numberOfThreads <= 30);

    try {
        Thread.sleep(1500);
    } catch (InterruptedException e) {
        e.printStackTrace();
    }

    Collection<Service> services = ServiceInfo.INSTANCE.getServices();
    System.out.println("services: " + services.size());

    for (Service service : services) {
        System.out.println("service: " + service + ". total: " + service.getTotalRequestCount());
    }

    Assert.assertEquals(3, services.size());

    //        try {
    //            Thread.sleep(60000);
    //        } catch (InterruptedException e) {
    //            e.printStackTrace();
    //        }

}

From source file:ufo.remote.calls.benchmark.client.caller.hornetq.HornetQTester.java

@Override
protected void startTest(final TesterResult result) {

    ProducerTemplate producerTemplate = camelContext.createProducerTemplate();
    producerTemplate.setExecutorService(Executors.newFixedThreadPool(20));

    String url = HornetQApacheCamelConfig.JMS_NAME
            + ":queue:echo?deliveryPersistent=false&replyToDeliveryPersistent=false";
    AtomicInteger failures = new AtomicInteger(0);
    CountDownLatch latch = new CountDownLatch(result.totalCalls);

    for (int i = 0; i < result.totalCalls; i++) {
        producerTemplate.asyncCallbackRequestBody(url, result.message, new Synchronization() {

            @Override// ww  w  .  j a  va2s . c  o m
            public void onFailure(final Exchange exchange) {
                failures.incrementAndGet();
                latch.countDown();
            }

            @Override
            public void onComplete(final Exchange exchange) {
                if (logger.isDebugEnabled()) {
                    logger.debug("Received message [{}]", exchange.getIn().getBody());
                }
                latch.countDown();
            }
        });
    }

    try {
        latch.await();
    } catch (InterruptedException e) {
        throw new RuntimeException(e);
    }
    result.failures = failures.get();

}

From source file:ufo.remote.calls.benchmark.client.caller.activemq.ActiveMQTester.java

@Override
protected void startTest(final TesterResult result) {

    ProducerTemplate producerTemplate = camelContext.createProducerTemplate();
    producerTemplate.setExecutorService(Executors.newFixedThreadPool(20));

    String url = ActiveMQApacheCamelConfig.JMS_NAME
            + ":queue:echo?deliveryPersistent=false&replyToDeliveryPersistent=false";
    AtomicInteger failures = new AtomicInteger(0);
    CountDownLatch latch = new CountDownLatch(result.totalCalls);

    for (int i = 0; i < result.totalCalls; i++) {
        producerTemplate.asyncCallbackRequestBody(url, result.message, new Synchronization() {

            @Override/* ww  w  .j  av a 2  s .com*/
            public void onFailure(final Exchange exchange) {
                failures.incrementAndGet();
                latch.countDown();
            }

            @Override
            public void onComplete(final Exchange exchange) {
                if (logger.isDebugEnabled()) {
                    logger.debug("Received message [{}]", exchange.getIn().getBody());
                }
                latch.countDown();
            }
        });
    }

    try {
        latch.await();
    } catch (InterruptedException e) {
        throw new RuntimeException(e);
    }
    result.failures = failures.get();

}

From source file:at.ac.tuwien.dsg.cloud.utilities.messaging.lightweight.rabbitMq.RabbitMqConsumer.java

public RabbitMqConsumer(ReceivingChannel channel) {
    this.messageListeners = new HashMap<>();
    this.threadPool = Executors.newFixedThreadPool(1);
    this.channel = channel;
    this.messageFifo = new CircularFifoQueue<>(100);
}

From source file:com.flipkart.bifrost.SampleUsageTest.java

@Test
public void testSendReceive() throws Exception {
    ObjectMapper mapper = new ObjectMapper();
    mapper.setSerializationInclusion(JsonInclude.Include.NON_NULL);
    mapper.setSerializationInclusion(JsonInclude.Include.NON_EMPTY);

    Connection connection = new Connection(Lists.newArrayList("localhost"), "guest", "guest");
    connection.start();//from  w  w  w  .  j  a  v a 2  s . c  o m

    //Create executor
    BifrostExecutor<Map<String, Object>> executor = BifrostExecutor
            .<Map<String, Object>>builder(HttpCallCommand.class).connection(connection).objectMapper(mapper)
            .requestQueue("bifrost-send").responseQueue("bifrost-recv")
            .executorService(Executors.newFixedThreadPool(10)).responseWaitTimeout(20000).build();

    //Create execution server
    BifrostRemoteCallExecutionServer<Map<String, Object>> executionServer = BifrostRemoteCallExecutionServer
            .<Map<String, Object>>builder(HttpCallCommand.class).objectMapper(mapper).connection(connection)
            .concurrency(10).requestQueue("bifrost-send").build();
    executionServer.start();

    //Start making calls
    RemoteCallable<Map<String, Object>> callable = HttpCallCommand.createGet("http://jsonip.com/");
    Future<Map<String, Object>> result = executor.submit(callable);
    Map<String, Object> r = result.get();

    //Shutdown exverything when done
    executor.shutdown();
    executionServer.stop();
    connection.stop();

    Assert.assertTrue(r.containsKey("ip"));

}