Example usage for java.util.concurrent CountDownLatch CountDownLatch

Introduction

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

Prototype

public CountDownLatch(int count)

Source Link

Document

Constructs a CountDownLatch initialized with the given count.

Usage

From source file:Main.java

public static void runOnMainSync(final @NonNull Runnable runnable) {
    if (isMainThread()) {
        runnable.run();//from w  w  w .  ja  v a2 s . c  o m
    } else {
        final CountDownLatch sync = new CountDownLatch(1);
        runOnMain(new Runnable() {
            @Override
            public void run() {
                try {
                    runnable.run();
                } finally {
                    sync.countDown();
                }
            }
        });
        try {
            sync.await();
        } catch (InterruptedException ie) {
            throw new AssertionError(ie);
        }
    }
}

From source file:com.newlandframework.test.RpcParallelTest.java

public static void parallelAddCalcTask(AddCalculate calc, int parallel) throws InterruptedException {
    ///*from  ww  w.  ja  va2 s  .  c  o  m*/
    StopWatch sw = new StopWatch();
    sw.start();

    CountDownLatch signal = new CountDownLatch(1);
    CountDownLatch finish = new CountDownLatch(parallel);

    for (int index = 0; index < parallel; index++) {
        AddCalcParallelRequestThread client = new AddCalcParallelRequestThread(calc, signal, finish, index);
        new Thread(client).start();
    }

    signal.countDown();
    finish.await();
    sw.stop();

    String tip = String.format("RPC: [%s] ", sw.getTime());
    System.out.println(tip);
}

From source file:me.smoe.adar.zookeeper.zookeeper.Zookeeper.java

public static ZooKeeper getClient(String scheme, byte[] auth) throws Exception {
    CountDownLatch latch = new CountDownLatch(1);

    ZooKeeper zooKeeper = new ZooKeeper(CONNECT, 5000, (e) -> {
        latch.countDown();//w  w  w  .  j  a  v a  2 s  . com
    });

    latch.await();

    if (StringUtils.isNotEmpty(scheme) && auth != null) {
        zooKeeper.addAuthInfo(scheme, auth);
    }

    return zooKeeper;
}

From source file:com.frostwire.android.MediaScanner.java

private static void scanFiles(final Context context, List<String> paths, int retries) {
    if (paths.size() == 0) {
        return;/*from w ww.j a  va 2s . co  m*/
    }

    LOG.info("About to scan files n: " + paths.size() + ", retries: " + retries);

    final LinkedList<String> failedPaths = new LinkedList<>();

    final CountDownLatch finishSignal = new CountDownLatch(paths.size());

    MediaScannerConnection.scanFile(context, paths.toArray(new String[0]), null, (path, uri) -> {
        try {
            boolean success = true;
            if (uri == null) {
                success = false;
                failedPaths.add(path);
            } else {
                // verify the stored size four faulty scan
                long size = getSize(context, uri);
                if (size == 0) {
                    LOG.warn("Scan returned an uri but stored size is 0, path: " + path + ", uri:" + uri);
                    success = false;
                    failedPaths.add(path);
                }
            }
            if (!success) {
                LOG.info("Scan failed for path: " + path + ", uri: " + uri);
            }
        } finally {
            finishSignal.countDown();
        }
    });

    try {
        finishSignal.await(10, TimeUnit.SECONDS);
    } catch (InterruptedException e) {
        // ignore
    }

    if (failedPaths.size() > 0 && retries > 0) {
        // didn't want to do this, but there is a serious timing issue with the SD
        // and storage in general
        SystemClock.sleep(2000);
        scanFiles(context, failedPaths, retries - 1);
    }
}

From source file:com.manning.siia.pipeline.Counter.java

public synchronized void resetLatch(int latchSize) {
    latch = new CountDownLatch(latchSize);
}

From source file:com.clicktravel.cheddar.server.flow.control.RestAdapterStartLatchConfiguration.java

@Bean
public CountDownLatch restAdapterStartLatch() {
    return new CountDownLatch(1); // start latch is initially blocked
}

From source file:com.microsoft.office.core.EventsAsyncTestCase.java

@BeforeClass
public static void retrieveCalendar() throws Exception {
    final ICalendars cals = Me.getCalendars();
    final CountDownLatch cdl = new CountDownLatch(1);
    // an empty iterator will be returned for any entity set unless you call fetch()
    Futures.addCallback(cals.fetchAsync(), new FutureCallback<Void>() {
        @Override//from w  w w.j  a  va  2 s . co m
        public void onFailure(Throwable t) {
            cdl.countDown();
        }

        @Override
        public void onSuccess(Void result) {
            Iterator<ICalendar> iterator = cals.iterator();
            if (iterator.hasNext()) {
                calendar = iterator.next();
            }
            cdl.countDown();
        }
    });

    cdl.await(60000, TimeUnit.MILLISECONDS);
    if (calendar == null) {
        fail("No calendar found");
    }
}

From source file:com.newlandframework.test.RpcParallelTest.java

public static void parallelMultiCalcTask(MultiCalculate calc, int parallel) throws InterruptedException {
    ////from  w  w  w .  jav a  2 s .c o m
    StopWatch sw = new StopWatch();
    sw.start();

    CountDownLatch signal = new CountDownLatch(1);
    CountDownLatch finish = new CountDownLatch(parallel);

    for (int index = 0; index < parallel; index++) {
        MultiCalcParallelRequestThread client = new MultiCalcParallelRequestThread(calc, signal, finish, index);
        new Thread(client).start();
    }

    signal.countDown();
    finish.await();
    sw.stop();

    String tip = String.format("RPC: [%s] ", sw.getTime());
    System.out.println(tip);
}

From source file:com.alibaba.otter.node.etl.load.WeightControllerTest.java

@Test
public void test_simple() {
    int thread = 10;
    int count = 10;
    WeightController controller = new WeightController(thread);
    CountDownLatch latch = new CountDownLatch(thread);
    WeightWorkerTest[] workers = new WeightWorkerTest[thread];
    for (int i = 0; i < thread; i++) {
        int[] weights = new int[count];
        for (int j = 0; j < count; j++) {
            weights[j] = RandomUtils.nextInt(count);
        }//  w  w w .  j a v  a2  s  . com
        workers[i] = new WeightWorkerTest(i, weights, controller, latch);
    }

    for (int i = 0; i < thread; i++) {
        workers[i].start();
    }

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

From source file:com.amazonaws.eclipse.core.accounts.profiles.SdkCredentialsFileContentMonitorTest.java

@Test
public void testFileChangedCallback() throws InterruptedException {

    final CountDownLatch latch = new CountDownLatch(1);

    SdkCredentialsFileContentMonitor monitor = new SdkCredentialsFileContentMonitor(targetFile,
            MONITOR_POLLING_INTERVAL_MILLIS, new FileAlterationListenerAdaptor() {

                @Override//from w ww.j ava  2  s. c  o  m
                public void onFileChange(final File changedFile) {
                    latch.countDown();
                }
            });
    monitor.setDebugMode(true);
    monitor.start();

    touch(targetFile);

    long waitTime = MONITOR_POLLING_INTERVAL_MILLIS * 2;
    Assert.assertTrue("File monitor callback not invoked after waiting for " + waitTime + " ms.",
            latch.await(waitTime, TimeUnit.MILLISECONDS));
}