Examples of java.util.concurrent.atomic.AtomicBoolean.compareAndSet()

Class java.util.concurrent.atomic.AtomicBoolean

Examples of java.util.concurrent.atomic.AtomicBoolean.compareAndSet()

java.util.concurrent.atomic.AtomicBoolean.compareAndSet()
Atomically sets the value to the given updated value if the current value {@code ==} the expected value. @param expect the expected value @param update the new value @return {@code true} if successful. False return indicates thatthe actual value was not equal to the expected value.

        // Efficient way of checking whether another thread is already processing messages from 'sender'.
        // If that's the case, we return immediately and let the exiting thread process our message
        // (https://jira.jboss.org/jira/browse/JGRP-829). Benefit: fewer threads blocked on the same lock, these threads
        // can be returned to the thread pool
        final AtomicBoolean processing=win.getProcessing();
        if(!processing.compareAndSet(false, true)) {
            return;
        }


        // Prevents concurrent passing up of messages by different threads (http://jira.jboss.com/jira/browse/JGRP-198);
        // this is all the more important once we have a threadless stack (http://jira.jboss.com/jira/browse/JGRP-181),

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        final AtomicBoolean ok = new AtomicBoolean(true);
        final Callback<Object> callback = new Callback<Object>() {
            @Override
            public void notify(Object object) {
                if (Boolean.FALSE.equals(object)) {
                    ok.compareAndSet(true, false);
                } else if (object instanceof Throwable) {
                    ok.compareAndSet(true, false);
                }
                s.release();
            }

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            @Override
            public void notify(Object object) {
                if (Boolean.FALSE.equals(object)) {
                    ok.compareAndSet(true, false);
                } else if (object instanceof Throwable) {
                    ok.compareAndSet(true, false);
                }
                s.release();
            }
        };
        int notOwnedCount = 0;

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      if (listeners.get() != null)
      {
         for (RegistrationDestructionListener listener : listeners.get())
         {
            RegistrationDestructionListener.Vote vote = listener.destructionScheduledFor(registration);
            if (canRemove.compareAndSet(false, vote.result))
            {
               throw new RegistrationException("Could not remove Registration '" + registration.getRegistrationHandle()
                  + "' because listener '" + listener + "' vetoed removal. Cause: " + vote.reason);
            }
         }

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                completion.submit(new Callable<Exchange>() {
                    public Exchange call() throws Exception {
                        // only start the aggregation task when the task is being executed to avoid staring
                        // the aggregation task to early and pile up too many threads
                        if (aggregationTaskSubmitted.compareAndSet(false, true)) {
                            // but only submit the task once
                            aggregateExecutorService.submit(aggregateOnTheFlyTask);
                        }


                        if (!running.get()) {

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                                                       .setConnectionWatcher(new Watcher() {
            @Override
            public void process(WatchedEvent event) {
              if (event.getState() == Event.KeeperState.Expired) {
                expired.set(true);
              } else if (event.getState() == Event.KeeperState.SyncConnected && expired.compareAndSet(true, true)) {
                expireReconnectLatch.countDown();
              }
            }
          }).build()));
      client.startAndWait();

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                                cb.operationFinished(ctx, topicSubs);
                            }
                        }


                        private void reportFailure(PubSubException e) {
                            if (failed.compareAndSet(false, true))
                                cb.operationFailed(ctx, e);
                        }
                    }, ctx);
                }
            }

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                completion.submit(new Callable<Exchange>() {
                    public Exchange call() throws Exception {
                        // only start the aggregation task when the task is being executed to avoid staring
                        // the aggregation task to early and pile up too many threads
                        if (aggregationTaskSubmitted.compareAndSet(false, true)) {
                            // but only submit the task once
                            aggregateExecutorService.submit(aggregateOnTheFlyTask);
                        }


                        if (!running.get()) {

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                        {
                            InterProcessLock lock = makeLock(client);
                            lock.acquire();
                            try
                            {
                                if ( isFirst.compareAndSet(true, false) )
                                {
                                    timing.sleepABit();


                                    server.stop();
                                    Assert.assertTrue(timing.awaitLatch(latch));

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                                semaphore.acquire();
                                mutex.acquire();
                                Assert.assertTrue(hasLock.compareAndSet(false, true));
                                try
                                {
                                    if ( isFirst.compareAndSet(true, false) )
                                    {
                                        semaphore.release(THREAD_QTY - 1);
                                        while ( semaphore.availablePermits() > 0 )
                                        {
                                            Thread.sleep(100);

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