content: /*
   * Copyright (C) 2013 Facebook, Inc.
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package io.airlift.drift.transport.netty.server;
  
  import io.airlift.drift.transport.netty.codec.ThriftFrame;
  import io.netty.channel.ChannelDuplexHandler;
  import io.netty.channel.ChannelHandlerContext;
  import io.netty.channel.ChannelPromise;
  
  public class ResponseOrderingHandler
          extends ChannelDuplexHandler
  {
      @Override
      public void channelRead(ChannelHandlerContext context, Object message)
      {
          if (message instanceof ThriftFrame) {
              ThriftFrame thriftFrame = (ThriftFrame) message;
              if (!thriftFrame.isSupportOutOfOrderResponse()) {
                  context.channel().config().setAutoRead(false);
              }
          }
          context.fireChannelRead(message);
      }
  
      @Override
      public void write(ChannelHandlerContext context, Object message, ChannelPromise promise)
      {
          if (message instanceof ThriftFrame) {
              // always re-enable auto read
              context.channel().config().setAutoRead(true);
          }
          context.write(message, promise);
      }
  }
  