Example usage for java.util.concurrent.locks ReentrantLock ReentrantLock

Introduction

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

Prototype

public ReentrantLock(boolean fair) 

Source Link

Document

Creates an instance of ReentrantLock with the given fairness policy.

Usage

From source file:com.ganji.cateye.flume.kestrel.KestrelRpcClient.java

License:asdf

public KestrelRpcClient() {
    stateLock = new ReentrantLock(true);
    connState = State.INIT;/*ww  w.j a  va2s  .  co  m*/

    threadCounter = new AtomicLong(0);
    // OK to use cached threadpool, because this is simply meant to timeout
    // the calls - and is IO bound.
    callTimeoutPool = Executors.newCachedThreadPool(new ThreadFactory() {
        @Override
        public Thread newThread(Runnable r) {
            Thread t = new Thread(r);
            t.setName(KestrelRpcClient.this.sinkName + "-" + String.valueOf(threadCounter.incrementAndGet()));
            return t;
        }
    });
}

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From source file:org.eclipse.ecr.core.storage.sql.LockManager.java

/**
 * Creates a lock manager using the given mapper.
 * <p>//  w w w  .  j a  va2s.c o  m
 * The mapper will from then on be only used and closed by the lock manager.
 * <p>
 * {@link #shutdown} must be called when done with the lock manager.
 */
public LockManager(Mapper mapper, boolean clusteringEnabled) {
    this.mapper = mapper;
    this.clusteringEnabled = clusteringEnabled;
    serializationLock = new ReentrantLock(true); // fair
    caching = !clusteringEnabled;
    lockCache = caching ? new LRUCache<Serializable, Lock>(CACHE_SIZE) : null;
}

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From source file:org.nuxeo.ecm.core.storage.sql.LockManager.java

/**
 * Creates a lock manager using the given mapper.
 * <p>/*from  w ww .j ava  2  s .co  m*/
 * The mapper will from then on be only used and closed by the lock manager.
 * <p>
 * {@link #shutdown} must be called when done with the lock manager.
 */
public LockManager(Mapper mapper, boolean clusteringEnabled) throws StorageException {
    this.mapper = mapper;
    this.connection = ((JDBCMapper) mapper).connection;
    this.clusteringEnabled = clusteringEnabled;
    serializationLock = new ReentrantLock(true); // fair
    caching = !clusteringEnabled;
    lockCache = caching ? new LRUCache<Serializable, Lock>(CACHE_SIZE) : null;
    try {
        connection.setAutoCommit(true);
    } catch (SQLException e) {
        throw new StorageException(e);
    }
}

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From source file:org.paxml.control.MutexTag.java

private Lock getLock(String lockName) {

    Lock lock = MAP.get(lockName);
    if (lock == null) {
        lock = new ReentrantLock(true);
        Lock existingLock = MAP.putIfAbsent(lockName, lock);
        if (existingLock != null) {
            lock = existingLock;/*w ww.  j a v  a 2 s .  com*/
        }
    }
    return lock;
}

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From source file:net.solarnetwork.node.io.rxtx.RxtxDataCollectorFactory.java

private Lock acquireLock() throws LockTimeoutException {
    log.debug("Acquiring lock on port {}; waiting at most {} {}",
            new Object[] { portIdentifier, timeout, unit });
    synchronized (PORT_LOCKS) {
        if (!PORT_LOCKS.containsKey(portIdentifier)) {
            PORT_LOCKS.put(portIdentifier, new ReentrantLock(true));
        }//  w ww. ja  v a  2  s . com
        Lock lock = PORT_LOCKS.get(portIdentifier);
        try {
            if (lock.tryLock(timeout, unit)) {
                log.debug("Acquired port {} lock", portIdentifier);
                return lock;
            }
            log.debug("Timeout acquiring port {} lock", portIdentifier);
        } catch (InterruptedException e) {
            log.debug("Interrupted waiting for port {} lock", portIdentifier);
        }
    }
    throw new LockTimeoutException("Could not acquire port " + portIdentifier + " lock");
}

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From source file:io.tilt.minka.spectator.Spectator.java

public Spectator(final String hostPortArg, String logId) {
    this.logId = logId == null ? String.valueOf(hashCode()) : logId;
    this.shutdownLock = new ReentrantLock(true);
    // initialize user objects map
    this.mapObjects = new ConcurrentHashMap<>();
    setHostPort(hostPortArg);//from  ww  w  .  ja  va 2s .c  o  m

    // ensure finalization
    Runtime.getRuntime().addShutdownHook(new Thread(() -> leaveAllMeetings(true), SHUTDOWN_THREAD_NAME));
}

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From source file:de.unirostock.sems.cbarchive.web.dataholder.Workspace.java

@JsonIgnore
public synchronized Lock lockArchive(String archiveId) throws CombineArchiveWebException {

    if (archives.containsKey(archiveId) == false)
        throw new CombineArchiveWebException("No such archive.");

    ReentrantLock archiveLock = null;
    synchronized (this) {
        archiveLock = locks.get(archiveId);
        if (archiveLock == null) {
            archiveLock = new ReentrantLock(true);
            locks.put(archiveId, archiveLock);
        }//from   w  w w  .j  av  a  2  s  .c o m
    }

    try {
        if (archiveLock.tryLock(Fields.LOCK_ARCHIVE_TIMEOUT, TimeUnit.SECONDS) == false)
            throw new CombineArchiveWebException("Lock timeout.");
    } catch (InterruptedException e) {
        throw new CombineArchiveWebException("Lock interrupted.", e);
    }

    return archiveLock;
}

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From source file:net.sf.jasperreports.engine.fill.JRVirtualizationContext.java

private void initLock() {
    lock = new ReentrantLock(true);
}

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From source file:hudson.plugins.ec2.EC2RetentionStrategy.java

protected Object readResolve() {
    checkLock = new ReentrantLock(false);
    return this;
}

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From source file:org.alfresco.repo.workflow.WorkflowReportServiceImpl.java

private ReentrantLock acquireLock(String id) {
    synchronized (WorkflowReportServiceImpl.class) {
        String lockId = StringUtils.isBlank(id) ? "ReentrantLockDefaultLockId" : id;
        if (!taskAddingLock.containsKey(lockId)) {
            taskAddingLock.put(lockId, new ReentrantLock(true));
        }//w  w  w . j  a va  2 s  . c om
        return taskAddingLock.get(lockId);
    }
}

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