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

                if (log.isFine()) log.logFine("HELLO #" + i + " to peer '" + seed.get(yacySeed.NAME, "") + "' at " + address); // debug
                final String seederror = seed.isProper(false);
                if ((address == null) || (seederror != null)) {
                    // we don't like that address, delete it
                    sb.peers.peerActions.peerDeparture(seed, "peer ping to peer resulted in address = " + address + "; seederror = " + seederror);
                    sync.acquire();
                } else {
                    // starting a new publisher thread
                    contactedSeedCount++;
                    (new publishThread(yacyCore.publishThreadGroup, seed, sync, syncList)).start();
                }

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            // receiving the result of all started publisher threads
            for (int j = 0; j < contactedSeedCount; j++) {


                // waiting for the next thread to finish
                sync.acquire();


                // if this is true something is wrong ...
                if (syncList.isEmpty()) {
                    log.logWarning("PeerPing: syncList.isEmpty()==true");
                    continue;

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      Assert.assertEquals(100L, startScnCp.getBootstrapStartScn().longValue());


      log.info("instrument the client pipeline so that we can intercept and delay the channelClosed message");
      final Semaphore passMessage = new Semaphore(1);
      final CountDownLatch closeSent = new CountDownLatch(1);
      passMessage.acquire();
      conn._channel.getPipeline().addBefore("handler", "closeChannelDelay",
          new SimpleChannelHandler(){
            @Override
            public void channelClosed(ChannelHandlerContext ctx, ChannelStateEvent e) throws Exception {
              closeSent.countDown();

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      conn._channel.getPipeline().addBefore("handler", "closeChannelDelay",
          new SimpleChannelHandler(){
            @Override
            public void channelClosed(ChannelHandlerContext ctx, ChannelStateEvent e) throws Exception {
              closeSent.countDown();
              passMessage.acquire();
              try
              {
                super.channelClosed(ctx, e);
              }
              finally

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            if (loadingGuards.get(key) == null) {
                loadingGuards.putIfAbsent(key, new Semaphore(1));
            }
            final Semaphore loadingGuard = loadingGuards.get(key);
            try {
                loadingGuard.acquire();
                resourceBundle = resourceBundleCache.get(key);
                if (resourceBundle != null) {
                    log.debug("getResourceBundleInternal({}): got cache hit on second try", key);
                } else {
                    log.debug("getResourceBundleInternal({}): reading from Repository", key);

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                         comparisons, sspace, vector,
                         other, similarityType, mostSimilar));
        }
        
        try {
            comparisons.acquire();
        } catch (InterruptedException ie) {
            // check whether we were interrupted while still waiting for the
            // comparisons to finish
             if (comparisons.availablePermits() < 1) {
                throw new IllegalStateException(

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                });
        }
        
        // Wait until all the documents have been processed
        try {
            termsProcessed.acquire(uniqueTerms);
        } catch (InterruptedException ie) {
            throw new Error("interrupted while waiting for terms to " +
                            "finish reprocessing", ie);
        }        
        LOGGER.info("finished reprocessing all terms");

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            });
        }
                
        // Wait 
        try { 
            itemsProcessed.acquire(numQuestions);
        } catch (InterruptedException ie) {
            throw new Error(ie);
        }


        // Copy over the answered questions to a smaller array so that

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        }
        corpusReader.close();


        // Wait until all the documents have been processed
        try {
            documentsRerocessed.acquire(numDocuments);
        } catch (InterruptedException ie) {
            throw new Error("interrupted while waiting for documents to " +
                            "finish reprocessing", ie);
        }        
        LOGGER.fine("finished reprocessing all documents");

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               if (executorService != null)
               {
                  try
                  {
                     taskSepaphore.acquire();
                     executorService.execute(task);
                  }
                  catch (RejectedExecutionException e)
                  {
                     // this may happen because of a race condition between the

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