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

            semaphore.acquire(2);


            client.create().forPath("/test/one", "hey there".getBytes());
            assertEvent(TreeCacheEvent.Type.NODE_ADDED, "/test/one");
            Assert.assertEquals(new String(cache.getCurrentData("/test/one").getData()), "hey there");
            semaphore.acquire();
            Assert.assertEquals(new String(cache2.getCurrentData("/test/one").getData()), "hey there");


            client.setData().forPath("/test/one", "sup!".getBytes());
            assertEvent(TreeCacheEvent.Type.NODE_UPDATED, "/test/one");
            Assert.assertEquals(new String(cache.getCurrentData("/test/one").getData()), "sup!");

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            Assert.assertEquals(new String(cache2.getCurrentData("/test/one").getData()), "hey there");


            client.setData().forPath("/test/one", "sup!".getBytes());
            assertEvent(TreeCacheEvent.Type.NODE_UPDATED, "/test/one");
            Assert.assertEquals(new String(cache.getCurrentData("/test/one").getData()), "sup!");
            semaphore.acquire();
            Assert.assertEquals(new String(cache2.getCurrentData("/test/one").getData()), "sup!");


            client.delete().forPath("/test/one");
            assertEvent(TreeCacheEvent.Type.NODE_REMOVED, "/test/one");
            Assert.assertNull(cache.getCurrentData("/test/one"));

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            Assert.assertEquals(new String(cache2.getCurrentData("/test/one").getData()), "sup!");


            client.delete().forPath("/test/one");
            assertEvent(TreeCacheEvent.Type.NODE_REMOVED, "/test/one");
            Assert.assertNull(cache.getCurrentData("/test/one"));
            semaphore.acquire();
            Assert.assertNull(cache2.getCurrentData("/test/one"));


            assertNoMoreEvents();
            Assert.assertEquals(semaphore.availablePermits(), 0);
        }

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            {
                @Override
                public void consumeMessage(String message) throws Exception
                {
                    messages.add(message);
                    semaphore.acquire();
                }


                @Override
                public void stateChanged(CuratorFramework client, ConnectionState newState)
                {

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    final Mustache test = new DefaultMustacheFactory().compile(new StringReader(template), "test");
    ExecutorService es = Executors.newCachedThreadPool();
    final AtomicInteger total = new AtomicInteger();
    final Semaphore semaphore = new Semaphore(100);
    for (int i = 0; i < 100000; i++) {
      semaphore.acquire();
      es.submit(new Runnable() {
        @Override
        public void run() {
          try {
          TestObject testObject = new TestObject(r.nextInt(), r.nextInt(), r.nextInt());

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          }
        }
      });
    }
    // Wait for them all to complete
    semaphore.acquire(100);
    assertEquals(0, total.intValue());
  }


  @Test
  public void testConcurrentExecutionWithConcurrentTemplate() throws InterruptedException {

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    dmf.setExecutorService(es);
    final Mustache test = dmf.compile(new StringReader(template), "test");
    final AtomicInteger total = new AtomicInteger();
    final Semaphore semaphore = new Semaphore(100);
    for (int i = 0; i < 100000; i++) {
      semaphore.acquire();
      es.submit(new Runnable() {
        @Override
        public void run() {
          try {
            TestObject testObject = new TestObject(r.nextInt(), r.nextInt(), r.nextInt());

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          }
        }
      });
    }
    // Wait for them all to complete
    semaphore.acquire(100);
    assertEquals(0, total.intValue());
  }
}

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            new Answer<Stat>()
            {
                @Override
                public Stat answer(InvocationOnMock invocation) throws Throwable
                {
                    semaphore.acquire();
                    return fakeStat;
                }
            }
        );

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    for (int threads = 1; threads < range; threads++) {
      final Semaphore semaphore = new Semaphore(threads);
      {
        long start = System.currentTimeMillis();
        while (true) {
          semaphore.acquire();
          es.submit(new Runnable() {
            @Override
            public void run() {
              parse.execute(new NullWriter(), new Object[] { parent });
              runs.incrementAndGet();

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