@Override
 public void collect(List<Chunk> chunks, int count) throws InterruptedException {
   defaultQueue.collect(chunks, count);
   for (Chunk chunk : chunks) {
     ChunkDumper.dump("sender", chunk);
   }
 }
 @Override
 public void add(Chunk chunk) throws InterruptedException {
   ChunkDumper.dump("adaptor", chunk);
   defaultQueue.add(chunk);
 }