Process a buffer to find Vine videos

Main.java

private static void processCurrentBuffer() {

  // Does nothing if the current buffer is already processing or
  // if it contains fewer elements than the minimum buffer size.
  if ((currentBufferId == 1 && (buffer1.isProcessing() || buffer1
      .getTweets().size() < MIN_BUFFER_SIZE)) ||
    (currentBufferId == 2 && (buffer2.isProcessing() || buffer2
      .getTweets().size() < MIN_BUFFER_SIZE))) {
    return;
  }

  // Otherwise, begin processing. 
  try {
    switch (currentBufferId) {
      case 1:
        buffer1.setProcessing(true);
        currentBufferId = 2;
        Thread t1 = new Thread(new ProcessingThread(buffer1,
          duplicateUrls, finishListener));
        t1.start();
        break;

      case 2:
        buffer2.setProcessing(true);
        currentBufferId = 1;
        Thread t2 = new Thread(new ProcessingThread(buffer2,
          duplicateUrls, finishListener));
        t2.start();
        break;
    }
  } catch (Throwable t) {
    t.printStackTrace();
  }
}