Examples of java.util.concurrent.Semaphore.acquire()

java.util.concurrent.Semaphore.acquire()
Acquires a permit from this semaphore, blocking until one is available, or the thread is {@linkplain Thread#interrupt interrupted}.
Acquires a permit, if one is available and returns immediately, reducing the number of available permits by one.
If no permit is available then the current thread becomes disabled for thread scheduling purposes and lies dormant until one of two things happens:
- Some other thread invokes the {@link #release} method for thissemaphore and the current thread is next to be assigned a permit; or
- Some other thread {@linkplain Thread#interrupt interrupts}the current thread.
If the current thread:
- has its interrupted status set on entry to this method; or
- is {@linkplain Thread#interrupt interrupted} while waitingfor a permit,
then {@link InterruptedException} is thrown and the current thread'sinterrupted status is cleared. @throws InterruptedException if the current thread is interrupted




        Random rand = new Random();


        for (int i=0; i<numOps; i++) {
            outstanding.acquire();
            lh[rand.nextInt(lh.length)].asyncAddEntry(msg, callback, System.currentTimeMillis());
        }




    }

View Full Code Here

        byte[] passwd = new byte[20];
        int size = Integer.getInteger("size", 1024);
        byte[] data = new byte[size];


        for (int i=0; i<numOps; i++) {
            outstanding.acquire();


            ByteBuffer buffer = ByteBuffer.allocate(44);
            long ledgerId = 1000;
            buffer.putLong(ledgerId);
            buffer.putLong(i);

View Full Code Here


            if (persistenceManager instanceof TopicOwnershipChangeListener) {


                TopicOwnershipChangeListener tocl = (TopicOwnershipChangeListener) persistenceManager;


                latch.acquire();


                tocl.acquiredTopic(topic, new Callback<Void>() {
                    @Override
                    public void operationFailed(Object ctx, PubSubException exception) {
                        failureException = new RuntimeException(exception);

View Full Code Here

                    public void operationFinished(Object ctx, Void res) {
                        ((Semaphore) ctx).release();
                    }
                }, latch);


                latch.acquire();
                latch.release();
                if (failureException != null) {
                    throw (Exception) failureException.getCause();
                }
            }

View Full Code Here

            }
        };
        background.start();


        // wait for the first commit
        semaphore.acquire();


        assertTrue(store.getRoot().hasProperty("foo"));
        assertFalse(store.getRoot().hasProperty("bar"));


        NodeBuilder b = store.getRoot().builder();

View Full Code Here

                        new Callable<Object>()
                        {
                            @Override
                            public Object call() throws Exception
                            {
                                semaphore.acquire();
                                mutex.acquire();
                                Assert.assertTrue(hasLock.compareAndSet(false, true));
                                try
                                {
                                    if ( isFirst.compareAndSet(true, false) )

View Full Code Here

                    }
                }
            );
        }


        processedLatch.acquire(children.size());
    }


    private enum ProcessMessageBytesCode
    {
        NORMAL,

View Full Code Here

            }
        };
        background.start();


        // wait for the first commit
        semaphore.acquire();


        assertTrue(store.getRoot().hasProperty("foo"));
        assertFalse(store.getRoot().hasProperty("bar"));


        NodeBuilder b = store.getRoot().builder();

View Full Code Here

                }
            });
        }


        // wait for all operations to complete
        semaphore.acquire(cluster.getNumberOfNodes());


        try {
            if(countSuccess.get() == cluster.getNumberOfNodes()
               || _props.getBoolean("swap.partial.index", false)) {
                int counter = 0;

View Full Code Here

                }
                Semaphore semaphore = mutexByTool.get(tool);
                if (semaphore == null) {
                    mutexByTool.put(tool, semaphore = new Semaphore(1));
                }
                semaphore.acquire();
                try {
                    return installer.performInstallation(tool, node, log).getRemote();
                } finally {
                    semaphore.release();
                }

View Full Code Here

0 1 2 3 4 5 6 7 8 9

TOP

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.