Examples of java.util.concurrent.locks.Lock.lock()

java.util.concurrent.locks.Lock.lock()
Acquires the lock.
If the lock is not available then the current thread becomes disabled for thread scheduling purposes and lies dormant until the lock has been acquired.
Implementation Considerations
A {@code Lock} implementation may be able to detect erroneous useof the lock, such as an invocation that would cause deadlock, and may throw an (unchecked) exception in such circumstances. The circumstances and the exception type must be documented by that {@code Lock} implementation.

            // manager and cach all dictionaries whose service.pid is set
            if ( !fullyLoaded )
            {
                lock.unlock();
                lock = globalLock.writeLock();
                lock.lock();
                if ( !fullyLoaded )
                {
                    Enumeration fromPm = pm.getDictionaries();
                    while (fromPm.hasMoreElements())
                    {

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     */
    public Dictionary load( String pid ) throws IOException
    {
        Lock lock = globalLock.readLock();
        try {
            lock.lock();
            Dictionary loaded = ( Dictionary ) cache.get( pid );
            if ( loaded == null && !fullyLoaded )
            {
                lock.unlock();
                lock = globalLock.writeLock();

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    private boolean replacePool(Host host, HostDistance distance, HostConnectionPool condition) throws ConnectionException, UnsupportedProtocolVersionException, ClusterNameMismatchException {
        if (isClosing)
            return true;


        Lock l = poolCreationLocks.get(host);
        l.lock();
        try {
            HostConnectionPool previous = pools.get(host);
            if (previous != condition)
                return false;

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    if (i == batchSize) {
      sinkCounter.incrementBatchCompleteCount();
    }
    sinkCounter.addToEventDrainAttemptCount(i);


    lock.lock();
    long startTime = System.nanoTime();
    long timeRemaining;
    try {
      while ((callbacksReceived.get() < callbacksExpected.get())
              && !txnFail.get()) {

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    try {
      if (forkedFilter == null)
        return;


      Lock forkedLock = forkedFilter.lock.writeLock();
      forkedLock.lock();
      try {
        filter.position(0);
        forkedFilter.filter.position(0);


        filter.put(forkedFilter.filter);

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          } catch (InterruptedException e) {
            e.printStackTrace();
          }
          
          Lock rl = rwl.writeLock();
          rl.lock();
          atom.incrementAndGet();
          rl.unlock();
          
          Lock wl = rwl.readLock();
          wl.lock();

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          rl.lock();
          atom.incrementAndGet();
          rl.unlock();
          
          Lock wl = rwl.readLock();
          wl.lock();
          System.out.println("threadId "+threadId +"lockOblect state "+atom.get());
          
          wl.unlock();
          threadId++;

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                lock = new ReentrantLock();
                locks.put(target, lock);
            }
        }


        lock.lock();
        try {
            processExchange(exchange, target);
        } finally {
            // do not remove as the locks cache has an upper bound
            // this ensure the locks is appropriate reused

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        unit.getTypes()[0].getFullyQualifiedName(), ILaunchManager.RUN_MODE);


    ILaunch launch = null;
    final Lock lock = new ReentrantLock();
    final Condition condition = lock.newCondition();
    lock.lock();
    try {
      // Wait for listener to be notified:
      while (listener.getLaunch(configName) == null) {
        condition.await(100, TimeUnit.MILLISECONDS);
      }

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        pkg.getJavaProject().getElementName(),
        unit2.getTypes()[0].getFullyQualifiedName(), ILaunchManager.RUN_MODE);


    final Lock lock = new ReentrantLock();
    final Condition condition = lock.newCondition();
    lock.lock();
    try {
      while (listener.getLaunch(configName1) == null
          || listener.getLaunch(configName2) == null) {
        condition.await(100, TimeUnit.MILLISECONDS);
      }

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