Example usage for java.util.concurrent Executors newCachedThreadPool

Introduction

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

Prototype

public static ExecutorService newCachedThreadPool() 

Source Link

Document

Creates a thread pool that creates new threads as needed, but will reuse previously constructed threads when they are available.

Usage

From source file:ddf.metrics.collector.rrd4j.RrdJmxCollector.java

/**
 * Initialization when the JmxCollector is created. Called by blueprint.
 *//*from  w  w  w . j a v a2  s.  c  om*/
public void init() {
    LOGGER.trace("ENTERING: init() for metric {}", metricName);

    if (executorPool == null) {
        executorPool = Executors.newCachedThreadPool();
    }

    // Creating JmxCollector can be time consuming,
    // so do this in a separate thread to prevent holding up creation
    // of Sources or the Catalog
    final Runnable jmxCollectorCreator = new Runnable() {
        public void run() {
            try {
                configureCollector();
            } catch (CollectorException e) {
                // Ignore, it has already been logged
            } catch (IOException e) {
                // Ignore, it has already been logged
            }
        }
    };

    LOGGER.debug("Start configureCollector thread for JmxCollector {}", mbeanAttributeName);
    executorPool.execute(jmxCollectorCreator);

    LOGGER.trace("EXITING: init()");
}

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From source file:ru.jts_dev.authserver.config.AuthIntegrationConfig.java

@Bean
public MessageChannel incomingPacketExecutorChannel() {
    // TODO: 07.12.15 investigate, may be should replaced with spring TaskExecutor
    return new ExecutorChannel(Executors.newCachedThreadPool());
}

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From source file:com.liferay.sync.engine.session.Session.java

public Session(URL url, String oAuthConsumerKey, String oAuthConsumerSecret, String oAuthToken,
        String oAuthTokenSecret, boolean trustSelfSigned, int maxConnections) {

    if (maxConnections == Integer.MAX_VALUE) {
        _executorService = Executors.newCachedThreadPool();
    } else {//ww  w .  jav  a  2 s  .com
        _executorService = Executors.newFixedThreadPool(maxConnections);
    }

    HttpClientBuilder httpClientBuilder = createHttpClientBuilder(trustSelfSigned, maxConnections);

    httpClientBuilder.setConnectionManager(_getHttpClientConnectionManager(trustSelfSigned));

    _httpClient = httpClientBuilder.build();

    _httpHost = new HttpHost(url.getHost(), url.getPort(), url.getProtocol());

    _oAuthConsumer = new CommonsHttpOAuthConsumer(oAuthConsumerKey, oAuthConsumerSecret);

    _oAuthConsumer.setTokenWithSecret(oAuthToken, oAuthTokenSecret);

    _oAuthEnabled = true;
}

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From source file:com.dangdang.ddframe.job.internal.job.dataflow.AbstractDataFlowElasticJob.java

@Override
public ExecutorService getExecutorService() {
    return Executors.newCachedThreadPool();
}

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From source file:mitm.common.tools.SendMail.java

private void sendMultiThreaded(final MailTransport mailSender, final MimeMessage message,
        final Address[] recipients) throws InterruptedException {
    ExecutorService threadPool = Executors.newCachedThreadPool();

    final Semaphore semaphore = new Semaphore(threads, true);

    final long startTime = System.currentTimeMillis();

    for (int i = 1; i <= count; i++) {
        long threadStart = System.currentTimeMillis();

        semaphore.acquireUninterruptibly();

        threadPool.execute(new Runnable() {
            @Override/*from   w  w w  . j av  a  2 s.  c  o  m*/
            public void run() {
                try {
                    MimeMessage clone = MailUtils.cloneMessage(message);

                    int sent = sentCount.incrementAndGet();

                    if (uniqueFrom) {
                        Address[] froms = clone.getFrom();

                        if (froms != null && froms.length > 0) {
                            clone.setFrom(
                                    new InternetAddress(sent + EmailAddressUtils.getEmailAddress(froms[0])));
                        }
                    }

                    mailSender.sendMessage(clone, recipients);

                    long timePassed = DateTimeUtils
                            .millisecondsToSeconds(System.currentTimeMillis() - startTime);

                    StrBuilder sb = new StrBuilder();

                    sb.append("Message\t" + sent + "\tsent.");

                    if (timePassed > 0) {
                        float msgPerSec = (float) sent / timePassed;

                        sb.append("\tmessages/second\t" + String.format("%.2f", msgPerSec));
                    }

                    logger.info(sb.toString());
                } catch (MessagingException e) {
                    logger.error("Error sending message.", e);
                } finally {
                    semaphore.release();
                }
            }
        });

        if (forceQuit.get()) {
            break;
        }

        if (throtllingSemaphore != null) {
            /* for throttling the sending of emails */
            throtllingSemaphore.acquire();
        } else {
            /* no throttling so use delay */
            long sleepTime = delay - (System.currentTimeMillis() - threadStart);

            if (sleepTime > 0) {
                Thread.sleep(sleepTime);
            }
        }
    }

    threadPool.shutdown();
    threadPool.awaitTermination(30, TimeUnit.SECONDS);

    waitForReceiveThreads();

    logger.info("Total sent: " + sentCount.intValue() + ". Total time: "
            + DateTimeUtils.millisecondsToSeconds(System.currentTimeMillis() - startTime) + " (sec.)");
}

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From source file:com.jagornet.dhcpv6.client.TestV4Client.java

/**
 * Start sending DHCPv4 DISCOVERs.// w  ww  .  j  a v  a 2 s  . co  m
 */
public void start() {
    DatagramChannelFactory factory = new NioDatagramChannelFactory(Executors.newCachedThreadPool());

    InetSocketAddress server = new InetSocketAddress(serverAddr, serverPort);
    InetSocketAddress client = new InetSocketAddress(clientPort);

    ChannelPipeline pipeline = Channels.pipeline();
    pipeline.addLast("logger", new LoggingHandler());
    pipeline.addLast("encoder", new DhcpV4ChannelEncoder());
    pipeline.addLast("decoder", new DhcpV4ChannelDecoder(client, false));
    pipeline.addLast("handler", this);

    channel = factory.newChannel(pipeline);
    channel.bind(client);

    List<DhcpV4Message> requestMsgs = buildRequestMessages();

    for (DhcpV4Message msg : requestMsgs) {
        executor.execute(new RequestSender(msg, server));
    }

    long ms = 0;
    if (rapidCommit)
        ms = requestMsgs.size() * 200;
    else
        ms = requestMsgs.size() * 20;

    synchronized (requestMap) {
        try {
            log.info("Waiting total of " + ms + " milliseconds for completion");
            //              requestMap.wait(ms);
            requestMap.wait();
        } catch (InterruptedException ex) {
            log.error("Interrupted", ex);
        }
    }

    log.info("Successfully processed " + successCnt + " of " + requestsSent + " messages in "
            + (endTime - startTime) + " milliseconds");

    log.info("Shutting down executor...");
    executor.shutdownNow();
    log.info("Closing channel...");
    channel.close();
    log.info("Done.");
    System.exit(0);
}

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From source file:oz.hadoop.yarn.api.core.LocalApplicationLaunchTests.java

@Test(timeout = 5000)
public void validateInfiniteJavaContainerLaunchForcedShutdown() throws Exception {
    final YarnApplication<Void> yarnApplication = YarnAssembly
            .forApplicationContainer(InfiniteContainer.class, ByteBuffer.wrap("Hello".getBytes()))
            .containerCount(4).memory(512).withApplicationMaster().maxAttempts(2).priority(2)
            .build("sample-yarn-application");
    ExecutorService executor = Executors.newCachedThreadPool();
    executor.execute(new Runnable() {
        @Override//from w  w  w  .  j  av  a 2 s. co  m
        public void run() {
            yarnApplication.launch();
        }
    });
    Thread.sleep(4000);
    assertTrue(yarnApplication.isRunning());
    yarnApplication.terminate();
    assertFalse(yarnApplication.isRunning());
    executor.shutdown();
}

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From source file:com.serotonin.modbus4j.ip.listener.TcpListener.java

@Override
synchronized public ModbusResponse sendImpl(ModbusRequest request) throws ModbusTransportException {

    if (!connected) {
        LOG.debug("No connection in Port: " + ipParameters.getPort());
        throw new ModbusTransportException(new Exception("TCP Listener has no active connection!"),
                request.getSlaveId());//  w w w . j  av  a 2s.  c o m
    }

    if (!initialized) {
        LOG.debug("Listener already terminated " + ipParameters.getPort());
        return null;
    }

    // Wrap the modbus request in a ip request.
    OutgoingRequestMessage ipRequest;
    if (ipParameters.isEncapsulated()) {
        ipRequest = new EncapMessageRequest(request);
        StringBuilder sb = new StringBuilder();
        for (byte b : Arrays.copyOfRange(ipRequest.getMessageData(), 0, ipRequest.getMessageData().length)) {
            sb.append(String.format("%02X ", b));
        }
        LOG.debug("Encap Request: " + sb.toString());
    } else {
        ipRequest = new XaMessageRequest(request, getNextTransactionId());
        StringBuilder sb = new StringBuilder();
        for (byte b : Arrays.copyOfRange(ipRequest.getMessageData(), 0, ipRequest.getMessageData().length)) {
            sb.append(String.format("%02X ", b));
        }
        LOG.debug("Xa Request: " + sb.toString());
    }

    // Send the request to get the response.
    IpMessageResponse ipResponse;
    try {
        // Send data via handler!
        handler.conn.DEBUG = true;
        ipResponse = (IpMessageResponse) handler.conn.send(ipRequest);
        if (ipResponse == null) {
            throw new ModbusTransportException(new Exception("No valid response from slave!"),
                    request.getSlaveId());
        }
        StringBuilder sb = new StringBuilder();
        for (byte b : Arrays.copyOfRange(ipResponse.getMessageData(), 0, ipResponse.getMessageData().length)) {
            sb.append(String.format("%02X ", b));
        }
        LOG.debug("Response: " + sb.toString());
        return ipResponse.getModbusResponse();
    } catch (Exception e) {
        LOG.debug(e.getLocalizedMessage() + ",  Port: " + ipParameters.getPort() + ", retries: " + retries);
        if (retries < 10 && !e.getLocalizedMessage().contains("Broken")) {
            retries++;
        } else {
            /*
             * To recover from a Broken Pipe, the only way is to restart serverSocket
             */
            LOG.debug("Restarting Socket,  Port: " + ipParameters.getPort() + ", retries: " + retries);

            // Close the serverSocket first to prevent new messages.
            try {
                if (serverSocket != null)
                    serverSocket.close();
            } catch (IOException e2) {
                LOG.debug("Error closing socket" + e2.getLocalizedMessage(), e);
                getExceptionHandler().receivedException(e2);
            }

            // Close all open connections.
            if (handler != null) {
                handler.closeConnection();
                terminateListener();
            }

            if (!initialized) {
                LOG.debug("Listener already terminated " + ipParameters.getPort());
                return null;
            }

            executorService = Executors.newCachedThreadPool();
            try {
                startListener();
            } catch (Exception e2) {
                LOG.warn("Error trying to restart socket" + e2.getLocalizedMessage(), e);
                throw new ModbusTransportException(e2, request.getSlaveId());
            }
            retries = 0;
        }
        LOG.warn("Error sending request,  Port: " + ipParameters.getPort() + ", msg: " + e.getMessage());
        // Simple send error!
        throw new ModbusTransportException(e, request.getSlaveId());
    }
}

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From source file:net.joshdevins.rabbitmq.client.ha.HaConnectionFactory.java

public HaConnectionFactory(final ConnectionParameters params) {
    super(params);

    executorService = Executors.newCachedThreadPool();
    setDefaultRetryStrategy();//  www  .  ja v a 2  s .  c  om

    // TODO: Should we use a concurrent instance or sync access to this Set?
    listeners = new HashSet<HaConnectionListener>();
}

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From source file:tw.edu.sju.ee.eea.module.iepe.project.window.IepeRealtimeSpectrumElement.java

private void initFX(JFXPanel fxPanel) {
    // This method is invoked on the JavaFX thread
    Scene scene = createScene();/*from   ww  w.j a va  2 s.c o m*/
    fxPanel.setScene(scene);

    //-- Prepare Executor Services
    executor = Executors.newCachedThreadPool();
    addToQueue = new AddToQueue();
    executor.execute(addToQueue);
    //-- Prepare Timeline
    prepareTimeline();
}

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