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

        this.idtoSem.put(strid, sem);
        ConcurrentLinkedQueue<DRPCRequest> queue=this.acquire_queue(this.requestQueues, function);
        queue.add(req);
        LOG.debug("Waiting for DRPC request for " +function+ " " +args+ " at " +(System.currentTimeMillis()));
        try {
            sem.acquire();
        } catch (InterruptedException e) {
            LOG.error("acquire fail " ,e);
        }
        LOG.debug("Acquired for DRPC request for " +function+ " " +args+ " at " +(System.currentTimeMillis()));

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        // even on headless clients
        panel.add(canvas, BorderLayout.CENTER);
        canvas.repaint();


        try {
            waitForReady.acquire();
        } catch (InterruptedException ex) {
            Logger.getLogger(ViewManager.class.getName()).log(Level.SEVERE, null, ex);
        }


        createCameraEntity(ClientContextJME.getWorldManager());

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    @SuppressWarnings("unchecked")
    @Test
    public void testServiceExport() throws Exception {


        final Semaphore sema = new Semaphore(1);
        sema.acquire(); 
        
        String scope = "(objectClass=abc)";
     
        IMocksControl c = EasyMock.createNiceControl();

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                }
            }
        });


        try {
            done.acquire();
            return out.value;
        } catch (InterruptedException ie) {
            return false;
        }
    }

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            final int permits = 2;
            final Semaphore semaphore = new Semaphore(permits);


            for (Runnable runnable : runnables) {
                try {
                    semaphore.acquire();
                    final Thread thread = new Thread();
                    thread.setDaemon(true);
                    thread.start();
                } catch (InterruptedException e) {
                    Thread.interrupted();

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                } catch (InterruptedException e) {
                    Thread.interrupted();
                }
            }
            try {
                semaphore.acquire(permits);
            } catch (InterruptedException e) {
                Thread.interrupted();
            }
        }
    }

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      int graceperiod = getGracePeriod(b);
      result = findBPCRef(b);
      if (result == null && graceperiod >= 0) {
        if (graceperiod == 0) { // Wait for an unlimited period
          try { 
            s.acquire();
          } catch (InterruptedException ix) {}
        } else { 
          try { 
            s.tryAcquire(graceperiod, TimeUnit.MILLISECONDS);
          } catch (InterruptedException ix) {}

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                    }
                }
            );
        }


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


    private enum ProcessMessageBytesCode
    {
        NORMAL,

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            cache = new PathChildrenCache(client, "/test", true)
            {
                @Override
                void getDataAndStat(String fullPath) throws Exception
                {
                    semaphore.acquire();
                    counter.incrementAndGet();
                    super.getDataAndStat(fullPath);
                    latch.countDown();
                }
            };

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            cache.start();
            cache2.start();


            assertEvent(TreeCacheEvent.Type.NODE_ADDED, "/test");
            assertEvent(TreeCacheEvent.Type.INITIALIZED);
            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();

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