Java Code Examples for java.util.concurrent.LinkedBlockingQueue#offer()

The following examples show how to use java.util.concurrent.LinkedBlockingQueue#offer() . These examples are extracted from open source projects. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example 1
Source Project: cyclops   File: ConnectableTest.java    License: Apache License 2.0 6 votes vote down vote up
@Test
public void backpressureScheduledDelay(){

    captured= "";

       diff =  System.currentTimeMillis();
      LinkedBlockingQueue<String> blockingQueue = new LinkedBlockingQueue<String>(1);
      blockingQueue.add("10");
      blockingQueue.offer("10");
      ReactiveSeq.range(0, Integer.MAX_VALUE)
          .limit(2)
          .peek(v-> diff = System.currentTimeMillis())
          .peek(i->System.out.println("diff is "  +diff))
          .map(i -> i.toString())
          .scheduleFixedDelay(1l, scheduled)
          .connect(blockingQueue)
          .onePer(1, TimeUnit.SECONDS)
          .peek(i->System.out.println("BQ " + blockingQueue))
          .peek(System.out::println)
          .forEach(c->captured=c);

      assertThat(System.currentTimeMillis() - diff,greaterThan(1500l));
}
 
Example 2
Source Project: cyclops   File: ConnectableTest.java    License: Apache License 2.0 6 votes vote down vote up
@Test
public void backpressureScheduledRate(){

    captured= "";

       diff =  System.currentTimeMillis();
      LinkedBlockingQueue<String> blockingQueue = new LinkedBlockingQueue<String>(1);
      blockingQueue.add("10");
      blockingQueue.offer("10");
      ReactiveSeq.range(0, Integer.MAX_VALUE)
          .limit(2)
          .peek(v-> diff = System.currentTimeMillis())
          .map(i -> i.toString())
          .scheduleFixedRate(1l, scheduled)
          .connect(blockingQueue)
          .onePer(1, TimeUnit.SECONDS)
          .peek(i->System.out.println("BQ " + blockingQueue))
          .peek(System.out::println)
          .forEach(c->captured=c);

      assertThat(System.currentTimeMillis() - diff,greaterThan(1500l));
}
 
Example 3
Source Project: cyclops   File: ConnectableTest.java    License: Apache License 2.0 6 votes vote down vote up
@Test
public void backpressureScheduledCron(){

    captured= "";

       diff =  System.currentTimeMillis();
      LinkedBlockingQueue<String> blockingQueue = new LinkedBlockingQueue<String>(1);
      blockingQueue.add("10");
      blockingQueue.offer("10");
      ReactiveSeq.range(0, Integer.MAX_VALUE)
          .limit(2)
          .peek(v-> diff = System.currentTimeMillis())
          .map(i -> i.toString())
          .schedule("* * * * * ?", scheduled)
          .connect(blockingQueue)
          .onePer(2, TimeUnit.SECONDS)
          .peek(i->System.out.println("BQ " + blockingQueue))
          .peek(System.out::println)
          .forEach(c->captured=c);

      assertThat(System.currentTimeMillis() - diff,greaterThan(1500l));
}
 
Example 4
Source Project: gc-log-analyzer   File: GCLog.java    License: Apache License 2.0 6 votes vote down vote up
/**
 * Parse a GC Log line-by-line using the provided reader.
 */
public int parse(final LineNumberReader br) throws Exception {
  final LinkedBlockingQueue<String> queue = new LinkedBlockingQueue<String>(1000);
  // fire up a producer thread that feeds lines from the reader into the queue the parser uses to read lines from
  final Thread feeder = new Thread() {
    public void run() {
      String line = null;
      try {
        while ((line = br.readLine()) != null) {
          try {
            queue.offer(line, 10, TimeUnit.SECONDS);
          } catch (InterruptedException e) {
            Thread.interrupted();
            log.error(e);
          }
        }
      } catch (IOException ioExc) {
        log.error(ioExc);
      }
      keepPolling = false; // this tells the queue to stop polling once it sees a null from poll
    }
  };
  feeder.start();
  return parse(queue);
}
 
Example 5
Source Project: binlake   File: BinlogWorker.java    License: Apache License 2.0 5 votes vote down vote up
/**
 * open the valve to keep on dump data
 */
public void keepDump() {
    LinkedBlockingQueue<Object> thq = throttler;
    if (thq != null) {
        thq.offer(object);
    }
}
 
Example 6
Source Project: binlake   File: BinlogHandler.java    License: Apache License 2.0 5 votes vote down vote up
/**
 * 将消息 发往队列
 *
 * @param msg
 */
public void offer(IMessage msg) {
    LinkedBlockingQueue<IMessage> queue = this.queue;
    if (queue != null) {
        queue.offer(msg);
    }
}
 
Example 7
/**
 * Creates a pool of ByteBuffers with the given size.
 *
 * @param poolSize the number of buffers to initialize the pool with
 * @param bufferSize the size of each buffer
 * @return a blocking queue with size equal to poolSize and each buffer equal to bufferSize
 */
protected BlockingQueue<ByteBuffer> createBufferPool(final int poolSize, final int bufferSize) {
    final LinkedBlockingQueue<ByteBuffer> bufferPool = new LinkedBlockingQueue<>(poolSize);
    for (int i = 0; i < poolSize; i++) {
        bufferPool.offer(ByteBuffer.allocate(bufferSize));
    }
    return bufferPool;
}
 
Example 8
Source Project: fluency   File: BufferPool.java    License: Apache License 2.0 5 votes vote down vote up
public void returnBuffer(ByteBuffer byteBuffer)
{
    LinkedBlockingQueue<ByteBuffer> buffers = bufferPool.get(byteBuffer.capacity());
    if (buffers == null) {
        throw new IllegalStateException("`buffers` shouldn't be null");
    }

    byteBuffer.position(0);
    byteBuffer.limit(byteBuffer.capacity());
    buffers.offer(byteBuffer);
}
 
Example 9
/**
 * Creates a pool of ByteBuffers with the given size.
 *
 * @param poolSize the number of buffers to initialize the pool with
 * @param bufferSize the size of each buffer
 * @return a blocking queue with size equal to poolSize and each buffer equal to bufferSize
 */
protected BlockingQueue<ByteBuffer> createBufferPool(final int poolSize, final int bufferSize) {
    final LinkedBlockingQueue<ByteBuffer> bufferPool = new LinkedBlockingQueue<>(poolSize);
    for (int i = 0; i < poolSize; i++) {
        bufferPool.offer(ByteBuffer.allocate(bufferSize));
    }
    return bufferPool;
}
 
Example 10
Source Project: Neptune   File: PluginManager.java    License: Apache License 2.0 4 votes vote down vote up
/**
 * 准备启动指定插件组件
 *
 * @param mContext     主工程Context
 * @param mConnection  bindService时需要的ServiceConnection,如果不是bindService的方式启动组件,传入Null
 * @param mIntent      需要启动组件的Intent
 * @param needAddCache 是否需要缓存Intnet,true:如果插件没有初始化,那么会缓存起来,等插件加载完毕再执行此Intent
 *                     false:如果插件没初始化,则直接抛弃此Intent
 */
public static boolean readyToStartSpecifyPlugin(Context mContext,
                                                ServiceConnection mConnection,
                                                Intent mIntent,
                                                boolean needAddCache) {
    PluginDebugLog.runtimeLog(TAG, "readyToStartSpecifyPlugin launchIntent: " + mIntent);
    String packageName = tryParsePkgName(mContext, mIntent);
    PluginLoadedApk mLoadedApk = getPluginLoadedApkByPkgName(packageName);
    if (mLoadedApk == null) {
        deliver(mContext, false, packageName, ErrorType.ERROR_PLUGIN_NOT_LOADED, "pluginLoadedApk not ready");
        PluginDebugLog.runtimeLog(TAG, packageName + "readyToStartSpecifyPlugin launchIntent exception, plugin loaded apk not exist");
        PActivityStackSupervisor.clearLoadingIntent(packageName);
        return false;
    }

    LinkedBlockingQueue<IntentRequest> cacheIntents =
            PActivityStackSupervisor.getCachedIntent(packageName);
    if (cacheIntents == null) {
        cacheIntents = new LinkedBlockingQueue<IntentRequest>();
        PActivityStackSupervisor.addCachedIntent(packageName, cacheIntents);
    }
    // 避免重复添加Intent请求到队列中,尤其是第一次初始化时在enterProxy中已经添加了一次
    IntentRequest request = new IntentRequest(mIntent, mConnection);
    if (!cacheIntents.contains(request) && needAddCache) {
        PluginDebugLog.runtimeLog(TAG, "readyToStartSpecifyPlugin launchIntent add to cacheIntent....");
        cacheIntents.offer(request);  // 添加到队列
    } else {
        PluginDebugLog.runtimeLog(TAG, "readyToStartSpecifyPlugin launchIntent no need add to cacheIntent....needAddCache:" + needAddCache);
    }

    PluginDebugLog.runtimeLog(TAG, "readyToStartSpecifyPlugin launchIntent_cacheIntents: " + cacheIntents);
    if (!mLoadedApk.hasLaunchIngIntent()) {
        IntentRequest firstRequest = cacheIntents.poll(); //处理队首的Intent
        if (firstRequest != null && firstRequest.getIntent() != null) {
            PluginDebugLog.runtimeFormatLog(TAG, "readyToStartSpecifyPlugin, no launching intent for pkgName: %s, " +
                    "ready to process first intent in queue!", packageName);
            doRealLaunch(mContext, mLoadedApk, firstRequest.getIntent(), firstRequest.getServiceConnection());
        }
    } else {
        PluginDebugLog.runtimeFormatLog(TAG, "readyToStartSpecifyPlugin, has launching intent for pkgName %s " +
                "waiting other intent process over", packageName);
    }
    return true;
}
 
Example 11
/**
 * Evict a batch (blocking put, but spins to look for an error in the
 * <i>writerFuture</i> to avoid a deadlock if the writer fails).
 * 
 * @param writerFuture
 *            The {@link Future} of the {@link WriterTask} (required).
 * @param queue
 *            The queue onto which the batches are being transferred
 *            (required).
 * @param batch
 *            A batch (required).
 * 
 * @throws InterruptedException
 */
private static void putOnQueue(final Future<?> writerFuture, final LinkedBlockingQueue<Batch> queue,
		final Batch batch) throws InterruptedException {

	while (!writerFuture.isDone()) {

		if (queue.offer(batch, 100L, TimeUnit.MILLISECONDS)) {
			return;
		}

	}
	
	if (writerFuture.isDone()) {

		/*
		 * This is most likely to indicate either an error or interrupt in the writer.
		 */

		throw new RuntimeException("Writer is done, but reader still working?");

	}
	
}