Example usage for java.util.concurrent.locks Lock lock

List of usage examples for java.util.concurrent.locks Lock lock

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In this page you can find the example usage for java.util.concurrent.locks Lock lock.

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lock

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Usage

From source file:com.piggate.sdk.PiggateInfo.java

public static ArrayList<PiggateInfo> getInfo() {
    Lock l = rwLock2.readLock();
    ArrayList<PiggateInfo> result = new ArrayList<PiggateInfo>();
    l.lock();
    try {/* ww w . ja  v a  2 s . co m*/
        result.addAll(internal_info);
    } catch (Exception ex) {
    } finally {
        l.unlock();
    }
    return result;
}

From source file:net.myrrix.online.generation.Generation.java

private static Solver recomputeSolver(FastByIDMap<float[]> M, Lock readLock) {
    readLock.lock();
    try {//from w w  w  . j  a v a  2  s  . co m
        if (M == null || M.isEmpty()) {
            return null;
        }
        RealMatrix MTM = MatrixUtils.transposeTimesSelf(M);
        double infNorm = MTM.getNorm();
        if (infNorm < 1.0) {
            log.warn("X'*X or Y'*Y has small inf norm ({}); try decreasing model.als.lambda", infNorm);
            throw new IllConditionedSolverException("infNorm: " + infNorm);
        }
        return MatrixUtils.getSolver(MTM);
    } finally {
        readLock.unlock();
    }
}

From source file:Main.java

/**
 * like Platform.runLater but waits until the thread has finished
 * based on: http://www.guigarage.com/2013/01/invokeandwait-for-javafx/
 * @param r the runnable to run in a JavaFX thread
 *///  w w w .  jav  a 2 s.co  m
public static void platformRunAndWait(final Runnable r) throws Throwable {
    if (Platform.isFxApplicationThread()) {
        try {
            r.run();
        } catch (Exception e) {
            throw new ExecutionException(e);
        }
    } else {
        final Lock lock = new ReentrantLock();
        final Condition condition = lock.newCondition();
        final boolean[] done = { false };
        // to get around the requirement for final
        final Throwable[] ex = { null };
        lock.lock();
        try {

            Platform.runLater(() -> {
                lock.lock();
                try {
                    r.run();
                } catch (Throwable e) {
                    ex[0] = e;
                } finally {
                    try {
                        done[0] = true;
                        condition.signal();
                    } finally {
                        lock.unlock();
                    }
                }
            });

            while (!done[0])
                condition.await();

            if (ex[0] != null) {
                // re-throw exception from the runLater thread
                throw ex[0];
            }
        } finally {
            lock.unlock();
        }
    }
}

From source file:com.piggate.sdk.PiggateOffers.java

public static ArrayList<PiggateOffers> getOffers() {
    Lock l = rwLock2.readLock();
    ArrayList<PiggateOffers> result = new ArrayList<PiggateOffers>();
    l.lock();
    try {/*from  w  ww .j ava  2  s  .c  o  m*/
        result.addAll(internal_offers);
    } catch (Exception ex) {
    } finally {
        l.unlock();
    }
    return result;
}

From source file:och.util.Util.java

public static <T> T inLock(Lock lock, Callable<T> body) throws Exception {
    lock.lock();
    try {/*from w  w w  .j  ava 2s.c  o  m*/
        return body.call();
    } finally {
        lock.unlock();
    }
}

From source file:och.util.Util.java

public static void inLock(Lock lock, CallableVoid body) throws Exception {
    lock.lock();
    try {//from   ww  w  .  j a v  a  2s. c o  m
        body.call();
    } finally {
        lock.unlock();
    }
}

From source file:org.gridgain.grid.kernal.ggfs.hadoop.GridGgfsHadoopIpcIo.java

/**
 * Returns a started and valid instance of this class
 * for a given endpoint./*ww  w  .  j  a va  2 s.  c  o  m*/
 *
 * @param log Logger to use for new instance.
 * @param endpoint Endpoint string.
 * @return New or existing cached instance, which is started and operational.
 * @throws IOException If new instance was created but failed to start.
 */
public static GridGgfsHadoopIpcIo get(Log log, String endpoint) throws IOException {
    while (true) {
        GridGgfsHadoopIpcIo clientIo = ipcCache.get(endpoint);

        if (clientIo != null) {
            if (clientIo.acquire())
                return clientIo;
            else
                // If concurrent close.
                ipcCache.remove(endpoint, clientIo);
        } else {
            Lock lock = initLock.getLock(endpoint);

            lock.lock();

            try {
                clientIo = ipcCache.get(endpoint);

                if (clientIo != null) { // Perform double check.
                    if (clientIo.acquire())
                        return clientIo;
                    else
                        // If concurrent close.
                        ipcCache.remove(endpoint, clientIo);
                }

                // Otherwise try creating a new one.
                clientIo = new GridGgfsHadoopIpcIo(endpoint, new GridGgfsMarshaller(), log);

                try {
                    clientIo.start();
                } catch (GridException e) {
                    throw new IOException(e.getMessage(), e);
                }

                GridGgfsHadoopIpcIo old = ipcCache.putIfAbsent(endpoint, clientIo);

                // Put in exclusive lock.
                assert old == null;

                return clientIo;
            } finally {
                lock.unlock();
            }
        }
    }
}

From source file:org.apache.ignite.internal.processors.hadoop.igfs.HadoopIgfsIpcIo.java

/**
 * Returns a started and valid instance of this class
 * for a given endpoint.//  w w w . j a v  a  2s  .  c  o  m
 *
 * @param log Logger to use for new instance.
 * @param endpoint Endpoint string.
 * @return New or existing cached instance, which is started and operational.
 * @throws IOException If new instance was created but failed to start.
 */
public static HadoopIgfsIpcIo get(Log log, String endpoint) throws IOException {
    while (true) {
        HadoopIgfsIpcIo clientIo = ipcCache.get(endpoint);

        if (clientIo != null) {
            if (clientIo.acquire())
                return clientIo;
            else
                // If concurrent close.
                ipcCache.remove(endpoint, clientIo);
        } else {
            Lock lock = initLock.getLock(endpoint);

            lock.lock();

            try {
                clientIo = ipcCache.get(endpoint);

                if (clientIo != null) { // Perform double check.
                    if (clientIo.acquire())
                        return clientIo;
                    else
                        // If concurrent close.
                        ipcCache.remove(endpoint, clientIo);
                }

                // Otherwise try creating a new one.
                clientIo = new HadoopIgfsIpcIo(endpoint, new IgfsMarshaller(), log);

                try {
                    clientIo.start();
                } catch (IgniteCheckedException e) {
                    throw new IOException(e.getMessage(), e);
                }

                HadoopIgfsIpcIo old = ipcCache.putIfAbsent(endpoint, clientIo);

                // Put in exclusive lock.
                assert old == null;

                return clientIo;
            } finally {
                lock.unlock();
            }
        }
    }
}

From source file:com.cloudera.oryx.als.serving.ServerRecommender.java

private static float[] getFeatures(long longID, LongObjectMap<float[]> matrix, ReadWriteLock lock) {
    float[] features;
    Lock readLock = lock.readLock();
    readLock.lock();
    try {/*from   w  ww. j a  va  2s  . c o  m*/
        features = matrix.get(longID);
        if (features == null) {
            int numFeatures = countFeatures(matrix);
            if (numFeatures > 0) {
                features = new float[numFeatures];
                Lock writeLock = lock.writeLock();
                readLock.unlock();
                writeLock.lock();
                try {
                    matrix.put(longID, features);
                } finally {
                    readLock.lock();
                    writeLock.unlock();
                }
            }
        }
    } finally {
        readLock.unlock();
    }
    return features;
}

From source file:info.pancancer.arch3.worker.CollectingLogOutputStream.java

/**
 * Process a line./*from w  ww  . j  a  v a 2 s . c om*/
 * 
 * @param line
 *            - A line.
 * @param level
 *            - a logging level. Not used in this implementation.
 */
@Override
protected void processLine(String line, int level) {
    Lock lock = new ReentrantLock();
    lock.lock();
    lines.add(line);
    lock.unlock();
}