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.

                new Callable<Object>()
                {
                    @Override
                    public Object call() throws Exception
                    {
                        if ( firstTime.compareAndSet(true, false) )
                        {
                            try
                            {
                                client.getZooKeeper().create("/foo", new byte[0], ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT);
                            }

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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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                                LeaderLatch latch = new LeaderLatch(client, PATH_NAME);
                                try
                                {
                                    latch.start();
                                    Assert.assertTrue(latch.await(timing.forWaiting().seconds(), TimeUnit.SECONDS));
                                    Assert.assertTrue(thereIsALeader.compareAndSet(false, true));
                                    Thread.sleep((int)(10 * Math.random()));
                                }
                                finally
                                {
                                    thereIsALeader.set(false);

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    final Directory dir = newDirectory();
    final IndexWriter writer = new IndexWriter(dir,
        newIndexWriterConfig( TEST_VERSION_CURRENT, new MockAnalyzer(random())).setInfoStream(new InfoStream() {
        @Override
        public void message(String component, final String message) {
          if (message.startsWith("now flush at close") && thrown.compareAndSet(false, true)) {
            throw new OutOfMemoryError("fake OOME at " + message);
          }
        }


        @Override

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        final AtomicBoolean first = new AtomicBoolean(true);
        final Vector<Object> results = new Vector<Object>();
        consumer.setMessageListener(new MessageListener() {


            public void onMessage(Message message) {
                if (first.compareAndSet(true, false)) {
                    try {
                        consumer.setMessageListener(this);
                        results.add(message);
                    } catch (JMSException e) {
                        results.add(e);

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        final AtomicBoolean first = new AtomicBoolean(true);
        final Vector<Object> results = new Vector<Object>();
        consumer.setMessageListener(new MessageListener() {


            public void onMessage(Message message) {
                if (first.compareAndSet(true, false)) {
                    try {
                        MessageConsumer anotherConsumer = session.createConsumer(dest);
                        anotherConsumer.setMessageListener(this);
                        results.add(message);
                    } catch (JMSException e) {

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        VMTransport t = ((ActiveMQConnection)connection).getTransport().narrow(VMTransport.class);
        t.setTransportListener(new TransportListener() {
            @Override
            public void onCommand(Object command) {
                // block first dispatch for a while so broker backs up, but other connection should be able to proceed
                if (first.compareAndSet(true, false)) {
                    try {
                        ok.set(done.await(35, TimeUnit.SECONDS));
                        LOG.info("Done waiting: " + ok.get());
                    } catch (InterruptedException e) {
                        e.printStackTrace();

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                    public void send(final ProducerBrokerExchange producerExchange,
                                     org.apache.activemq.command.Message messageSend)
                            throws Exception {
                        // so send will hang as if reply is lost
                        super.send(producerExchange, messageSend);
                        if (first.compareAndSet(false, true)) {
                            producerExchange.getConnectionContext().setDontSendReponse(true);
                            Executors.newSingleThreadExecutor().execute(new Runnable() {
                                public void run() {
                                    try {
                                        LOG.info("Waiting for recepit");

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                    @Override
                    public void send(final ProducerBrokerExchange producerExchange,
                                     org.apache.activemq.command.Message messageSend)
                            throws Exception {
                        super.send(producerExchange, messageSend);
                        if (first.compareAndSet(false, true)) {
                            producerExchange.getConnectionContext().setDontSendReponse(true);
                            Executors.newSingleThreadExecutor().execute(new Runnable() {
                                public void run() {
                                    try {
                                        LOG.info("Waiting for recepit");

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