Examples of java.util.concurrent.BlockingQueue.poll()

Class java.util.concurrent.BlockingQueue

Examples of java.util.concurrent.BlockingQueue.poll()

java.util.concurrent.BlockingQueue.poll()
Retrieves and removes the head of this queue, waiting up to the specified wait time if necessary for an element to become available. @param timeout how long to wait before giving up, in units of{@code unit} @param unit a {@code TimeUnit} determining how to interpret the{@code timeout} parameter @return the head of this queue, or {@code null} if thespecified waiting time elapses before an element is available @throws InterruptedException if interrupted while waiting

      try {
         maxNumberInvariant.readLock().lock();
         Object result;
         try {
            // first try to take an element without waiting
            result = queue.poll();
            if (result == null) {
               // there are no elements in the queue, make sure the producer is started
               keyProducerStartLatch.open();
               // our address might have been removed from the consistent hash
               if (!address.equals(getAddressForKey(address)))

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        while (queue != null && isRunAllowed()) {
            final Exchange exchange = this.getEndpoint().createExchange();


            try {
                final Object body = queue.poll(endpoint.getConfiguration().getPollInterval(), TimeUnit.MILLISECONDS);


                if (body != null) {
                    if (body instanceof DefaultExchangeHolder) {
                        DefaultExchangeHolder.unmarshal(exchange, (DefaultExchangeHolder) body);
                    } else {

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         maxNumberInvariant.readLock().lock();
         Object result = null;
         try {
            while (result == null && !keyGenWorker.isStopped()) {
               // first try to take an element without waiting
               result = queue.poll();
               if (result == null) {
                  // there are no elements in the queue, make sure the producer is started
                  keyProducerStartLatch.open();
                  // our address might have been removed from the consistent hash
                  if (!address.equals(getAddressForKey(address)))

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        while (queue != null && isRunAllowed()) {
            final Exchange exchange = new DefaultExchange(this.getEndpoint().getCamelContext());


            try {
                final Object body = queue.poll(endpoint.getConfiguration().getPollInterval(), TimeUnit.MILLISECONDS);


                if (body != null) {
                    exchange.getIn().setBody(body);
                    try {
                        processor.process(exchange, new AsyncCallback() {

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        while (queue != null && isRunAllowed()) {
            final Exchange exchange = new DefaultExchange(this.getEndpoint().getCamelContext());


            try {
                final Object body = queue.poll(endpoint.getConfiguration().getPollInterval(), TimeUnit.MILLISECONDS);


                if (body != null) {
                    if (body instanceof DefaultExchangeHolder) {
                        DefaultExchangeHolder.unmarshal(exchange, (DefaultExchangeHolder) body);
                    } else {

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        final BlockingQueue q = new LocalConcurrentBlockingObjectQueue(2);
        final CheckedBarrier threadsStarted = new CheckedBarrier(2);
        ExecutorService executor = Executors.newFixedThreadPool(2);
        executor.execute(new CheckedRunnable() {
            public void realRun() throws InterruptedException {
                assertNull(q.poll());
                threadsStarted.await();
                assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS));
                checkEmpty(q);
            }
        });

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        ExecutorService executor = Executors.newFixedThreadPool(2);
        executor.execute(new CheckedRunnable() {
            public void realRun() throws InterruptedException {
                assertNull(q.poll());
                threadsStarted.await();
                assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS));
                checkEmpty(q);
            }
        });


        executor.execute(new CheckedRunnable() {

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            int k = (i < SIZE) ? i : SIZE;
            assertEquals(k, l.size());
            assertEquals(SIZE - k, q.size());
            for (int j = 0; j < k; ++j)
                assertEquals(l.get(j), new Integer(j));
            while (q.poll() != null) ;
        }
    }




}

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            q.add(one);
            ArrayList c = new ArrayList();
            for (int n : ns)
                assertEquals(0, q.drainTo(new ArrayList(), n));
            assertEquals(1, q.size());
            assertSame(one, q.poll());
            assertTrue(c.isEmpty());
        }
    }


    /**

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        final CheckedBarrier barrier = new CheckedBarrier(2);
        final Object zero = makeElement(0);
        Thread t = newStartedThread(new CheckedRunnable() {
            public void realRun() throws InterruptedException {
                long startTime = System.nanoTime();
                assertNull(q.poll(timeoutMillis(), MILLISECONDS));
                assertTrue(millisElapsedSince(startTime) >= timeoutMillis());


                barrier.await();


                assertSame(zero, q.poll(LONG_DELAY_MS, MILLISECONDS));

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