Examples of org.menagerie.latches.spi.ZkSemaphore.availablePermits()

Class org.menagerie.latches.spi.ZkSemaphore

Examples of org.menagerie.latches.spi.ZkSemaphore.availablePermits()

org.menagerie.latches.spi.ZkSemaphore.availablePermits()
Gets the number of permits available at the time of invocation
Note that size estimates in a distributed environment are necessarily a moving target. This method is typically useful only for debugging and testing purposes, and should not be used for programmatic control flow. @return the number of permits available in this semaphore at the time of invocation

        DistributedSemaphore semaphore = new ZkSemaphore(numPermits, basePath,zkSessionManager);


        semaphore.acquire();


        //check that the available permits are zero
        assertEquals("semaphore does not report fewer permits!",numPermits-1,semaphore.availablePermits());
        semaphore.release();
        assertEquals("semaphore does not report releasing a permit!",numPermits,semaphore.availablePermits());
    }


    @Test(timeout = 1000l)

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        semaphore.acquire();


        //check that the available permits are zero
        assertEquals("semaphore does not report fewer permits!",numPermits-1,semaphore.availablePermits());
        semaphore.release();
        assertEquals("semaphore does not report releasing a permit!",numPermits,semaphore.availablePermits());
    }


    @Test(timeout = 1000l)
    public void testTwoThreadsCanAccessSempahore() throws Exception{
        final CountDownLatch latch = new CountDownLatch(1);

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    @Test(timeout = 1000l)
    public void testAcquireMultiplePermits() throws Exception{
        DistributedSemaphore semaphore = new ZkSemaphore(2,basePath,zkSessionManager);


        semaphore.acquire(2);
        assertEquals("Incorrect number of permits reported!",0,semaphore.availablePermits());


        semaphore.release();
        assertEquals("Incorrect number of permits reported",1,semaphore.availablePermits());


        semaphore.release();

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        semaphore.acquire(2);
        assertEquals("Incorrect number of permits reported!",0,semaphore.availablePermits());


        semaphore.release();
        assertEquals("Incorrect number of permits reported",1,semaphore.availablePermits());


        semaphore.release();
        assertEquals("Incorrect number of permits reported",2,semaphore.availablePermits());
    }

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        semaphore.release();
        assertEquals("Incorrect number of permits reported",1,semaphore.availablePermits());


        semaphore.release();
        assertEquals("Incorrect number of permits reported",2,semaphore.availablePermits());
    }


    @Test(timeout = 2000l)
    public void testAcquireMultiplePermitsBlocksUntilAvailableTwoThreads() throws Exception{
        final CountDownLatch latch = new CountDownLatch(1);

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    public void testAcquireMultiplePermitsBlocksUntilAvailableTwoThreads() throws Exception{
        final CountDownLatch latch = new CountDownLatch(1);
        final DistributedSemaphore semaphore = new ZkSemaphore(2,basePath,zkSessionManager);


        semaphore.acquire(2);
        assertEquals("Incorrect number of permits reported!",0,semaphore.availablePermits());
        Future<Void> errorFuture = testService.submit(new Callable<Void>() {
            @Override
            public Void call() throws Exception {
                semaphore.acquire(2);
                latch.countDown();

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        final CountDownLatch latch = new CountDownLatch(1);
        final DistributedSemaphore semaphore = new ZkSemaphore(2,basePath,zkSessionManager);


        semaphore.acquire();
        semaphore.acquire();
        assertEquals("Incorrect number of permits reported!",0,semaphore.availablePermits());
        Future<Void> errorFuture = testService.submit(new Callable<Void>() {
            @Override
            public Void call() throws Exception {
                ZooKeeper zk = newZooKeeper();
                try {

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    public void testReleaseMultiplePermits() throws Exception{
        DistributedSemaphore semaphore = new ZkSemaphore(2,basePath,zkSessionManager);


        semaphore.acquire();
        semaphore.acquire();
        assertEquals("Incorrect number of permits reported!",0,semaphore.availablePermits());


        semaphore.release(2);
        assertEquals("Incorrect number of permits reported",2,semaphore.availablePermits());
    }

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        semaphore.acquire();
        semaphore.acquire();
        assertEquals("Incorrect number of permits reported!",0,semaphore.availablePermits());


        semaphore.release(2);
        assertEquals("Incorrect number of permits reported",2,semaphore.availablePermits());
    }


    @Test(timeout = 1000l)
    public void testTryAcquire() throws Exception{
        DistributedSemaphore semaphore = new ZkSemaphore(2,basePath,zkSessionManager);

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