Example usage for java.util.concurrent CountDownLatch await

Introduction

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

Prototype

public void await() throws InterruptedException 

Source Link

Document

Causes the current thread to wait until the latch has counted down to zero, unless the thread is Thread#interrupt interrupted .

Usage

From source file:com.griddynamics.jagger.JaggerLauncher.java

private static void launchKernel(final URL directory) {

    LaunchTask runKernel = new LaunchTask() {
        private Kernel kernel;

        @Override/*from ww  w. ja  v  a  2  s.c  o  m*/
        public void run() {
            log.info("Starting Kernel");

            ApplicationContext context = loadContext(directory, KERNEL_CONFIGURATION, environmentProperties);

            final CountDownLatch latch = new CountDownLatch(1);
            final Coordinator coordinator = (Coordinator) context.getBean("coordinator");

            kernel = (Kernel) context.getBean("kernel");

            toTerminate(kernel);

            Runnable kernelRunner = new Runnable() {
                @Override
                public void run() {
                    try {
                        latch.await();
                    } catch (InterruptedException e) {
                        throw new RuntimeException(e);
                    }
                    kernel.run();
                }
            };

            getExecutor().execute(kernelRunner);

            coordinator.waitForReady();
            coordinator.waitForInitialization();

            latch.countDown();
        }
    };

    builder.addBackgroundTask(runKernel);
}

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From source file:cp.server.app.ClientMultiThreadedExecution.java

public static void fetch() throws Exception {
    // Create an HttpClient with the ThreadSafeClientConnManager.
    // This connection manager must be used if more than one thread will
    // be using the HttpClient.
    // PoolingHttpClientConnectionManager cm = new
    // PoolingHttpClientConnectionManager();
    // cm.setMaxTotal(100);

    // CloseableHttpClient httpclient = HttpClients.custom()
    // .setConnectionManager(cm).build();
    ExecutorService pool = Executors.newFixedThreadPool(10);
    ServerDAO dao = new ServerDAO();
    List<Page> pages = null;
    Time ts = new Time(System.currentTimeMillis());
    int interval;

    try {//w w  w.j a v  a  2  s .co  m
        // // before 10am, query with the comment yesterday
        // if (Integer.valueOf(ts.toString().substring(0, 2)) > 10)
        // {
        // interval = 1;
        // }
        // else
        // {
        // interval = 2;
        // }
        //
        // pages = dao.queryPagesByDayInterval(
        // ConnectionFactory.getConnection(), interval);
        //
        // System.out.println("load comments from " + pages.size() +
        // "pages.");
        // for (Page page : pages)
        // {
        // PAGESTACK.push(page.getUrl());
        // }
    } catch (Exception ex) {
        ex.printStackTrace();
    }

    try {
        // create an array of URIs to perform GETs on
        String[] urisToGet = { "http://sports.sina.com.cn", "http://news.sina.com.cn", "http://ent.sina.com.cn",
                "http://tech.sina.com.cn", "http://sports.sina.com.cn/o/2013-10-27/04016852444.shtml",
                "http://finance.sina.com.cn/china/20131027/043917125695.shtml",
                "http://sports.sina.com.cn/j/2013-10-27/06336852561.shtml",
                "http://sports.sina.com.cn/j/2013-10-26/21006851844.shtml" };

        for (int i = 0; i < 10000; i++) {
            for (int j = 0; j < urisToGet.length; j++) {
                PAGESTACK.push(urisToGet[j]);
            }
        }

        CountDownLatch cdl = new CountDownLatch(6);

        // create a thread for each URI
        GetThread[] threads = new GetThread[urisToGet.length];

        for (int i = 0; i < 4; i++) {
            // HttpGet httpget = new HttpGet(urisToGet[i]);
            threads[i] = new GetThread(urisToGet[i], i + 1, cdl);
        }

        // start the threads
        for (int j = 0; j < 4; j++) {
            pool.execute(threads[j]);
            // threads[j].start();
        }

        cdl.await();

    } finally {
        // httpclient.close();
        pool.shutdown();
    }
}

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From source file:org.wso2.carbon.device.mgt.iot.arduino.service.impl.util.ArduinoServiceUtils.java

public static String sendCommandViaHTTP(final String deviceHTTPEndpoint, String urlContext,
        boolean fireAndForgot) throws DeviceManagementException {

    String responseMsg = "";
    String urlString = ArduinoConstants.URL_PREFIX + deviceHTTPEndpoint + urlContext;

    if (log.isDebugEnabled()) {
        log.debug(urlString);/*from   w  w  w  .j  ava 2  s . c o  m*/
    }

    if (!fireAndForgot) {
        HttpURLConnection httpConnection = getHttpConnection(urlString);

        try {
            httpConnection.setRequestMethod(HttpMethod.GET);
        } catch (ProtocolException e) {
            String errorMsg = "Protocol specific error occurred when trying to set method to GET" + " for:"
                    + urlString;
            log.error(errorMsg);
            throw new DeviceManagementException(errorMsg, e);
        }

        responseMsg = readResponseFromGetRequest(httpConnection);

    } else {
        CloseableHttpAsyncClient httpclient = null;
        try {

            httpclient = HttpAsyncClients.createDefault();
            httpclient.start();
            HttpGet request = new HttpGet(urlString);
            final CountDownLatch latch = new CountDownLatch(1);
            Future<HttpResponse> future = httpclient.execute(request, new FutureCallback<HttpResponse>() {
                @Override
                public void completed(HttpResponse httpResponse) {
                    latch.countDown();
                }

                @Override
                public void failed(Exception e) {
                    latch.countDown();
                }

                @Override
                public void cancelled() {
                    latch.countDown();
                }
            });

            latch.await();

        } catch (InterruptedException e) {
            if (log.isDebugEnabled()) {
                log.debug("Sync Interrupted");
            }
        } finally {
            try {
                if (httpclient != null) {
                    httpclient.close();

                }
            } catch (IOException e) {
                if (log.isDebugEnabled()) {
                    log.debug("Failed on close");
                }
            }
        }
    }

    return responseMsg;
}

---

From source file:com.test.database.jedis.TestJedisEvalLua.java

public static void generateTestData() throws InterruptedException {
    Jedis jedis = new Jedis(host, port);
    jedis.flushAll();//from   w w  w. ja v  a2  s  . c  o  m
    jedis.close();
    final CountDownLatch latch = new CountDownLatch(threadCount);
    for (int i = 0; i < threadCount; ++i) {
        final int temp = i;
        Thread thread = new Thread() {
            public void run() {
                Jedis jedis = new Jedis(host, port);
                int per = honBaoCount / threadCount;
                JSONObject object = new JSONObject();
                for (int j = temp * per; j < (temp + 1) * per; j++) {
                    object.put("id", j);
                    object.put("money", j);
                    jedis.lpush(hongBaoList, object.toString());
                }
                latch.countDown();
                jedis.close();
            }
        };
        thread.start();
    }
    latch.await();
}

---

From source file:com.jkoolcloud.tnt4j.streams.StreamsAgent.java

private static void stopStreams() {
    if (streamThreads != null) {
        LOGGER.log(OpLevel.INFO, StreamsResources.getString(StreamsResources.RESOURCE_BUNDLE_NAME,
                "StreamsAgent.stopping.streams"), streamThreads.getName());
        Thread[] atl = new Thread[streamThreads.activeCount()];
        streamThreads.enumerate(atl, false);

        List<StreamThread> stl = new ArrayList<>(atl.length);

        for (Thread t : atl) {
            if (t instanceof StreamThread) {
                stl.add((StreamThread) t);
            }//from w w w. j  a v  a 2  s .c o m
        }

        if (stl.isEmpty()) {
            LOGGER.log(OpLevel.INFO, StreamsResources.getString(StreamsResources.RESOURCE_BUNDLE_NAME,
                    "StreamsAgent.streams.stop.empty"));
        } else {
            LOGGER.log(OpLevel.INFO, StreamsResources.getString(StreamsResources.RESOURCE_BUNDLE_NAME,
                    "StreamsAgent.streams.stop.start"), stl.size());
            CountDownLatch streamsCompletionSignal = new CountDownLatch(stl.size());
            long t1 = System.currentTimeMillis();

            for (StreamThread st : stl) {
                st.addCompletionLatch(streamsCompletionSignal);

                st.getTarget().stop();
            }

            try {
                streamsCompletionSignal.await();
            } catch (InterruptedException exc) {
            }

            LOGGER.log(OpLevel.INFO, StreamsResources.getString(StreamsResources.RESOURCE_BUNDLE_NAME,
                    "StreamsAgent.streams.stop.complete"), (System.currentTimeMillis() - t1));
        }
    }
}

---

From source file:org.coffeeking.controller.service.util.ConnectedCupServiceUtils.java

public static String sendCommandViaHTTP(final String deviceHTTPEndpoint, String urlContext,
        boolean fireAndForgot) throws DeviceManagementException {

    String responseMsg = "";
    String urlString = ConnectedCupConstants.URL_PREFIX + deviceHTTPEndpoint + urlContext;

    if (log.isDebugEnabled()) {
        log.debug(urlString);//from  w  ww .j a  va  2  s  . co  m
    }

    if (!fireAndForgot) {
        HttpURLConnection httpConnection = getHttpConnection(urlString);

        try {
            httpConnection.setRequestMethod(HttpMethod.GET);
        } catch (ProtocolException e) {
            String errorMsg = "Protocol specific error occurred when trying to set method to GET" + " for:"
                    + urlString;
            log.error(errorMsg);
            throw new DeviceManagementException(errorMsg, e);
        }

        responseMsg = readResponseFromGetRequest(httpConnection);

    } else {
        CloseableHttpAsyncClient httpclient = null;
        try {

            httpclient = HttpAsyncClients.createDefault();
            httpclient.start();
            HttpGet request = new HttpGet(urlString);
            final CountDownLatch latch = new CountDownLatch(1);
            Future<HttpResponse> future = httpclient.execute(request, new FutureCallback<HttpResponse>() {
                @Override
                public void completed(HttpResponse httpResponse) {
                    latch.countDown();
                }

                @Override
                public void failed(Exception e) {
                    latch.countDown();
                }

                @Override
                public void cancelled() {
                    latch.countDown();
                }
            });

            latch.await();

        } catch (InterruptedException e) {
            if (log.isDebugEnabled()) {
                log.debug("Sync Interrupted");
            }
        } finally {
            try {
                if (httpclient != null) {
                    httpclient.close();

                }
            } catch (IOException e) {
                if (log.isDebugEnabled()) {
                    log.debug("Failed on close");
                }
            }
        }
    }

    return responseMsg;
}

---

From source file:org.usergrid.benchmark.commands.queue.QueueReader.java

@Override
protected void doWork(CommandLine line, Queue<TestEvent> queue, String hostName, int workers, int count)
        throws Exception {

    CountDownLatch latch = new CountDownLatch(count * workers);

    queue.observe(new EventListener(latch, readsTimer, readLogger, queue));

    latch.await();

    writeTimerData(readsTimer);/*from   w  w w .j  a va 2s. c o  m*/

}

---

From source file:com.fusesource.forge.jmstest.threading.SteppablePool.java

public void waitUntilFinished() {
    CountDownLatch latch = new CountDownLatch(1);
    latches.add(latch);/* w ww  . ja v a 2s. c  o  m*/
    try {
        latch.await();
    } catch (InterruptedException ie) {
    }
}

---

From source file:com.dangdang.ddframe.job.api.type.dataflow.executor.DataflowJobExecutor.java

private void latchAwait(final CountDownLatch latch) {
    try {/*w w  w  .  j a  va2s  .c  o m*/
        latch.await();
    } catch (final InterruptedException ex) {
        Thread.currentThread().interrupt();
    }
}

---

From source file:com.facebook.LinkBench.LinkBenchDriver.java

/**
 * Start all runnables at the same time. Then block till all
 * tasks are completed. Returns the elapsed time (in millisec)
 * since the start of the first task to the completion of all tasks.
 *///from ww w  .  j ava2s  . c o  m
static long concurrentExec(final List<? extends Runnable> tasks) throws Throwable {
    final CountDownLatch startSignal = new CountDownLatch(tasks.size());
    final CountDownLatch doneSignal = new CountDownLatch(tasks.size());
    final AtomicLong startTime = new AtomicLong(0);
    for (final Runnable task : tasks) {
        new Thread(new Runnable() {
            @Override
            public void run() {
                /*
                 * Run a task.  If an uncaught exception occurs, bail
                 * out of the benchmark immediately, since any results
                 * of the benchmark will no longer be valid anyway
                 */
                try {
                    startSignal.countDown();
                    startSignal.await();
                    long now = System.currentTimeMillis();
                    startTime.compareAndSet(0, now);
                    task.run();
                } catch (Throwable e) {
                    Logger threadLog = Logger.getLogger(ConfigUtil.LINKBENCH_LOGGER);
                    threadLog.error("Unrecoverable exception in worker thread:", e);
                    Runtime.getRuntime().halt(1);
                }
                doneSignal.countDown();
            }
        }).start();
    }
    doneSignal.await(); // wait for all threads to finish
    long endTime = System.currentTimeMillis();
    return endTime - startTime.get();
}

---

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