content: /*
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You 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 com.alipay.remoting;
  
  import org.slf4j.Logger;
  
  import com.alipay.remoting.log.BoltLoggerFactory;
  import com.alipay.remoting.util.RemotingUtil;
  
  import io.netty.channel.ChannelDuplexHandler;
  import io.netty.channel.ChannelHandler.Sharable;
  import io.netty.channel.ChannelHandlerContext;
  import io.netty.handler.timeout.IdleStateEvent;
  
  /**
   * Server Idle handler.
   * 
   * In the server side, the connection will be closed if it is idle for a certain period of time.
   * 
   * @author jiangping
   * @version $Id: ServerIdleHandler.java, v 0.1 Nov 3, 2015 05:23:19 PM tao Exp $
   */
  @Sharable
  public class ServerIdleHandler extends ChannelDuplexHandler {
  
      private static final Logger logger = BoltLoggerFactory.getLogger("CommonDefault");
  
      /**
       * @see io.netty.channel.ChannelInboundHandlerAdapter#userEventTriggered(io.netty.channel.ChannelHandlerContext, java.lang.Object)
       */
      @Override
      public void userEventTriggered(final ChannelHandlerContext ctx, Object evt) throws Exception {
          if (evt instanceof IdleStateEvent) {
              try {
                  logger.warn("Connection idle, close it from server side: {}",
                      RemotingUtil.parseRemoteAddress(ctx.channel()));
                  ctx.close();
              } catch (Exception e) {
                  logger.warn("Exception caught when closing connection in ServerIdleHandler.", e);
              }
          } else {
              super.userEventTriggered(ctx, evt);
          }
      }
  }
  