Package org.apache.accumulo.server.zookeeper

Examples of org.apache.accumulo.server.zookeeper.DistributedReadWriteLock$WriteLock

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    final SomeData data = new SomeData();
    data.write();
    data.read();
    QueueLock qlock = new MockQueueLock();
   
    final ReadWriteLock locker = new DistributedReadWriteLock(qlock, "locker1".getBytes());
    Lock readLock = locker.readLock();
    Lock writeLock = locker.writeLock();
    readLock.lock();
    readLock.unlock();
    writeLock.lock();
    writeLock.unlock();
    readLock.lock();
    readLock.unlock();
   
    // do a bunch of reads/writes in separate threads, look for inconsistent updates
    Thread[] threads = new Thread[2];
    for (int i = 0; i < threads.length; i++) {
      final int which = i;
      threads[i] = new Thread() {
        public void run() {
          if (which % 2 == 0) {
            Lock wl = locker.writeLock();
            wl.lock();
            try {
              data.write();
            } finally {
              wl.unlock();
            }
          } else {
            Lock rl = locker.readLock();
            rl.lock();
            data.read();
            try {
              data.read();
            } finally {
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  private static Lock getLock(String tableId, long tid, boolean writeLock) throws Exception {
    byte[] lockData = String.format("%016x", tid).getBytes();
    ZooQueueLock qlock = new ZooQueueLock(ZooUtil.getRoot(HdfsZooInstance.getInstance()) + Constants.ZTABLE_LOCKS + "/" + tableId, false);
    Lock lock = DistributedReadWriteLock.recoverLock(qlock, lockData);
    if (lock == null) {
      DistributedReadWriteLock locker = new DistributedReadWriteLock(qlock, lockData);
      if (writeLock)
        lock = locker.writeLock();
      else
        lock = locker.readLock();
    }
    return lock;
  }
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    final SomeData data = new SomeData();
    data.write();
    data.read();
    QueueLock qlock = new MockQueueLock();
   
    final ReadWriteLock locker = new DistributedReadWriteLock(qlock, "locker1".getBytes());
    Lock readLock = locker.readLock();
    Lock writeLock = locker.writeLock();
    readLock.lock();
    readLock.unlock();
    writeLock.lock();
    writeLock.unlock();
    readLock.lock();
    readLock.unlock();
   
    // do a bunch of reads/writes in separate threads, look for inconsistent updates
    Thread[] threads = new Thread[2];
    for (int i = 0; i < threads.length; i++) {
      final int which = i;
      threads[i] = new Thread() {
        public void run() {
          if (which % 2 == 0) {
            Lock wl = locker.writeLock();
            wl.lock();
            try {
              data.write();
            } finally {
              wl.unlock();
            }
          } else {
            Lock rl = locker.readLock();
            rl.lock();
            data.read();
            try {
              data.read();
            } finally {
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Related Classes of org.apache.accumulo.server.zookeeper.DistributedReadWriteLock$WriteLock

  • co.paralleluniverse.strands.Strand
  • org.apache.accumulo.server.master.tableOps.Utils
  • org.apache.accumulo.server.zookeeper.DistributedReadWriteLockTest
  • org.apache.zookeeper.data.Stat
  • org.apache.commons.lang.NotImplementedException
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