Example usage for java.util.concurrent SynchronousQueue SynchronousQueue

Introduction

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

Prototype

public SynchronousQueue() 

Source Link

Document

Creates a SynchronousQueue with nonfair access policy.

Usage

From source file:org.apache.solr.client.solrj.TestBackupLBHttpSolrClient.java

@Override
public void setUp() throws Exception {
    super.setUp();
    httpClient = HttpClientUtil.createClient(null);
    HttpClientUtil.setConnectionTimeout(httpClient, 1000);
    solr = new HashMap<String, SolrInstance>();
    commExecutor = new ThreadPoolExecutor(0, Integer.MAX_VALUE, 5, TimeUnit.SECONDS, // terminate idle threads after 5 sec
            new SynchronousQueue<Runnable>(), // directly hand off tasks
            new DefaultSolrThreadFactory("TestBackupLBHttpSolrServer"));
}

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From source file:org.apache.activemq.JmsConnectionStartStopTest.java

public void testConcurrentSessionCreateWithStart() throws Exception {
    ThreadPoolExecutor executor = new ThreadPoolExecutor(50, Integer.MAX_VALUE, 60L, TimeUnit.SECONDS,
            new SynchronousQueue<Runnable>());
    final Vector<Throwable> exceptions = new Vector<Throwable>();
    final Random rand = new Random();
    Runnable createSessionTask = new Runnable() {
        @Override//from  w w  w.ja  va 2  s . co m
        public void run() {
            try {
                TimeUnit.MILLISECONDS.sleep(rand.nextInt(10));
                stoppedConnection.createSession(false, Session.AUTO_ACKNOWLEDGE);
            } catch (Exception e) {
                exceptions.add(e);
            }
        }
    };

    Runnable startStopTask = new Runnable() {
        @Override
        public void run() {
            try {
                TimeUnit.MILLISECONDS.sleep(rand.nextInt(10));
                stoppedConnection.start();
                stoppedConnection.stop();
            } catch (Exception e) {
                exceptions.add(e);
            }
        }
    };

    for (int i = 0; i < 1000; i++) {
        executor.execute(createSessionTask);
        executor.execute(startStopTask);
    }

    executor.shutdown();
    assertTrue("executor terminated", executor.awaitTermination(30, TimeUnit.SECONDS));
    assertTrue("no exceptions: " + exceptions, exceptions.isEmpty());
}

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From source file:org.esigate.extension.parallelesi.Esi.java

@Override
public void init(Driver driver, Properties properties) {
    driver.getEventManager().register(EventManager.EVENT_RENDER_PRE, this);

    driver.getEventManager().register(Surrogate.EVENT_SURROGATE_CAPABILITIES, new IEventListener() {
        @Override//from w w w.ja  v a2 s .  co m
        public boolean event(EventDefinition id, Event event) {
            CapabilitiesEvent capEvent = (CapabilitiesEvent) event;
            for (String capability : CAPABILITIES) {
                capEvent.getCapabilities().add(capability);
            }
            return true;
        }
    });

    // Load configuration
    this.maxThreads = THREADS.getValue(properties);
    this.idle = IDLE.getValue(properties);

    if (this.maxThreads == 0) {
        this.executor = null;
        LOG.info("Linear ESI processing enabled.");
    } else {
        this.executor = new ThreadPoolExecutor(0, this.maxThreads, this.idle, TimeUnit.SECONDS,
                new SynchronousQueue<Runnable>());

        LOG.info("Multi-threaded ESI processing enabled. Thread limit: {}, max idle {}.",
                String.valueOf(this.maxThreads), String.valueOf(this.idle));
    }

}

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From source file:org.hyperledger.fabric.sdk.HFClient.java

private HFClient() {

    executorService = new ThreadPoolExecutor(CLIENT_THREAD_EXECUTOR_COREPOOLSIZE,
            CLIENT_THREAD_EXECUTOR_MAXIMUMPOOLSIZE, CLIENT_THREAD_EXECUTOR_KEEPALIVETIME,
            CLIENT_THREAD_EXECUTOR_KEEPALIVETIMEUNIT, new SynchronousQueue<Runnable>(), r -> {
                Thread t = threadFactory.newThread(r);
                t.setDaemon(true);//  ww w .jav a 2 s. c  o  m
                return t;
            });

}

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From source file:org.rifidi.edge.core.sensors.sessions.AbstractServerSocketSensorSession.java

@Override
protected void _connect() throws IOException {
    if (serverSocketPort < 1) {
        logger.info("Not starting server socket, since port < 1");
        return;/*from w  w w .j a v a  2  s. c om*/
    }

    if (getStatus() == SessionStatus.CONNECTING || getStatus() == SessionStatus.PROCESSING) {
        logger.warn("Session already started");
        return;
    }
    setStatus(SessionStatus.CONNECTING);

    // create a new executor service that will handle each new request. Use
    // SynchronousQueue so that tasks will be rejected if there is no free
    // worker thread available
    executorService = new ThreadPoolExecutor(0, maxNumSensors, 5, TimeUnit.MINUTES,
            new SynchronousQueue<Runnable>());

    // open up server socket
    try {
        serverSocket = new ServerSocket(serverSocketPort);
    } catch (IOException e) {
        logger.error("Cannot start Alient Autonomous Sensor");
        disconnect();
        throw e;
    }
    logger.info(sensor.getID() + " listening on port " + serverSocket.getLocalPort()
            + ".  Maximum number of concurrent readers supported: " + maxNumSensors);
    setStatus(SessionStatus.PROCESSING);

    // while session is not closed, process each request
    while (!executorService.isShutdown()) {
        try {
            // wait on a new request
            Socket clientSocket = serverSocket.accept();
            logger.info("Accepted client at " + clientSocket.getInetAddress());

            // give the socket to the handler to do the dirty work
            ServerSocketSensorSessionReadThread handler = new ServerSocketSensorSessionReadThread(clientSocket,
                    getMessageParsingStrategyFactory(), getMessageProcessingStrategyFactory());
            try {
                executorService.execute(handler);
            } catch (RejectedExecutionException e) {
                logger.warn("Cannot create a handler thread for socket " + clientSocket.getInetAddress(), e);
                clientSocket.close();
            }
        } catch (IOException e) {
            // print an error message if we weren't the ones who caused the
            // problem
            if (!executorService.isShutdown()) {
                logger.error("Failed to start Alien Autonomous Handler", e);
            }
        }
    }
    logger.info("Stopping " + sensor.getID());
    setStatus(SessionStatus.CREATED);

}

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From source file:com.netflix.blitz4j.LoggingConfiguration.java

private LoggingConfiguration() {
    ThreadFactory threadFactory = new ThreadFactoryBuilder().setDaemon(false)
            .setNameFormat("DynamicLog4jListener").build();

    this.executorPool = new ThreadPoolExecutor(0, 1, 15 * 60, TimeUnit.SECONDS, new SynchronousQueue(),
            threadFactory);/*  w  w  w . j  av  a 2 s  .  c  om*/
}

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From source file:org.apache.solr.client.solrj.TestBackupLBHttpSolrServer.java

@Override
public void setUp() throws Exception {
    super.setUp();
    httpClient = HttpClientUtil.createClient(null);
    HttpClientUtil.setConnectionTimeout(httpClient, 1000);
    inFlightRequestMonitor = new InflightRequestMonitor(false);
    solr = new HashMap<String, SolrInstance>();
    commExecutor = new ThreadPoolExecutor(0, Integer.MAX_VALUE, 5, TimeUnit.SECONDS, // terminate idle threads after 5 sec
            new SynchronousQueue<Runnable>(), // directly hand off tasks
            new DefaultSolrThreadFactory("TestBackupLBHttpSolrServer"));
}

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From source file:org.isharding.shard.strategy.access.impl.ParallelShardAccessStrategy.java

private ThreadPoolExecutor buildThreadPoolExecutor() {
    return new ThreadPoolExecutor(10, 50, 60, TimeUnit.SECONDS, new SynchronousQueue<Runnable>(), FACTORY);
}

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From source file:natalia.dymnikova.util.ThreadPoolBeans.java

public ExecutorService backgroundTasksExecutor0() {
    final ThreadFactory factory = new ThreadFactoryBuilder().setNameFormat("background-%03d").setDaemon(true)
            .build();/*from   w  w  w.  j a va2  s.com*/

    final ExecutorService executor = new ThreadPoolExecutor(0, Integer.MAX_VALUE, 60L, TimeUnit.SECONDS,
            new SynchronousQueue<>(), factory);

    log.debug("Constructed background tasks executor {}", executor);
    return executor;
}

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From source file:org.apache.hedwig.server.netty.TestPubSubServer.java

@Test(timeout = 60000)
public void testUncaughtExceptionInNettyThread() throws Exception {

    SynchronousQueue<Throwable> queue = new SynchronousQueue<Throwable>();
    RecordingUncaughtExceptionHandler uncaughtExceptionHandler = new RecordingUncaughtExceptionHandler(queue);
    final int port = PortManager.nextFreePort();

    PubSubServer server = startServer(uncaughtExceptionHandler, port, new TopicManagerInstantiator() {

        @Override//from  w  ww. j  a  va  2 s .c o  m
        public TopicManager instantiateTopicManager() throws IOException {
            return new AbstractTopicManager(new ServerConfiguration(),
                    Executors.newSingleThreadScheduledExecutor()) {
                @Override
                protected void realGetOwner(ByteString topic, boolean shouldClaim,
                        Callback<HedwigSocketAddress> cb, Object ctx) {
                    throw new RuntimeException("this exception should be uncaught");
                }

                @Override
                protected void postReleaseCleanup(ByteString topic, Callback<Void> cb, Object ctx) {
                }
            };
        }
    });

    runPublishRequest(port);
    assertEquals(RuntimeException.class, queue.take().getClass());
    server.shutdown();
}

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