/**
   * See {@link ThreadPoolExecutor#shutdownNow()} for how it handles the shutdown. If <code>true
   * </code> is given to this method it also notifies all {@link ChannelFuture}'s of the not
   * executed {@link ChannelEventRunnable}'s.
   *
   * <p>Be aware that if you call this with <code>false</code> you will need to handle the
   * notification of the {@link ChannelFuture}'s by your self. So only use this if you really have a
   * use-case for it.
   */
  public List<Runnable> shutdownNow(boolean notify) {
    if (!notify) {
      return super.shutdownNow();
    }
    Throwable cause = null;
    Set<Channel> channels = null;

    List<Runnable> tasks = super.shutdownNow();

    // loop over all tasks and cancel the ChannelFuture of the ChannelEventRunable's
    for (Runnable task : tasks) {
      if (task instanceof ChannelEventRunnable) {
        if (cause == null) {
          cause = new IOException("Unable to process queued event");
        }
        ChannelEvent event = ((ChannelEventRunnable) task).getEvent();
        event.getFuture().setFailure(cause);

        if (channels == null) {
          channels = new HashSet<Channel>();
        }

        // store the Channel of the event for later notification of the exceptionCaught event
        channels.add(event.getChannel());
      }
    }

    // loop over all channels and fire an exceptionCaught event
    if (channels != null) {
      for (Channel channel : channels) {
        Channels.fireExceptionCaughtLater(channel, cause);
      }
    }
    return tasks;
  }
 @Override
 public void eventSunk(ChannelPipeline pipeline, ChannelEvent e) throws Exception {
   Channel channel = e.getChannel();
   if (channel instanceof SctpServerChannelImpl) {
     handleServerSocket(e);
   } else if (channel instanceof SctpChannelImpl) {
     handleAcceptedSocket(e);
   }
 }
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  /** Handle suspended reads */
  protected boolean handleReadSuspend(ChannelHandlerContext ctx, ChannelEvent e) {
    if (e instanceof ChannelStateEvent) {
      ChannelStateEvent cse = (ChannelStateEvent) e;
      if (cse.getState() == ChannelState.INTEREST_OPS
          && (((Integer) cse.getValue()).intValue() & Channel.OP_READ) != 0) {

        // setReadable(true) requested
        boolean readSuspended = ctx.getAttachment() != null;
        if (readSuspended) {
          // Drop the request silently if MemoryAwareThreadPool has
          // set the flag.
          e.getFuture().setSuccess();
          return true;
        }
      }
    }

    return false;
  }