5, netty fourth example, the idle detection handle

netty processor can support idle detection for detecting mentality, when the server exceeded the wait time, not when an event occurs, the handler method will trigger userEventTriggered.

initializer

 1 import io.netty.channel.ChannelInitializer;
 2 import io.netty.channel.ChannelPipeline;
 3 import io.netty.channel.socket.SocketChannel;
 4 import io.netty.handler.timeout.IdleStateHandler;
 5 
 6 import java.util.concurrent.TimeUnit;
 7 
 8 public class MyServerInitlalizer extends ChannelInitializer<SocketChannel> {
 9     @Override
10     protected void initChannel(SocketChannel ch) throws Exception {
11         Pipeline = the ChannelPipeline ch.pipeline ();
 12 is  
13 is          // idle event processor read write Idle Idle 5s 3s idle write 7S   
14          pipeline.addLast ( new new IdleStateHandler (5,7,3, TimeUnit.SECONDS)); // Idle not detected in a certain time interval reader 
15          pipeline.addLast ( new new MyServerHandler ()); // custom event idle processor 
16  
. 17      }
 18 }

 

handler

 1 import io.netty.channel.ChannelHandlerContext;
 2 import io.netty.channel.ChannelInboundHandler;
 3 import io.netty.channel.ChannelInboundHandlerAdapter;
 4 import io.netty.channel.SimpleChannelInboundHandler;
 5 import io.netty.handler.timeout.IdleStateEvent;
 6 
 7 public class MyServerHandler extends ChannelInboundHandlerAdapter {
 8     @Override
 9     public void userEventTriggered(ChannelHandlerContext ctx, Object evt) throws Exception {
10         //super.userEventTriggered (CTX, EVT); 
. 11          IF (EVT the instanceof IdleStateEvent) { // if it is an idle state 
12 is              IdleStateEvent Event = (IdleStateEvent) EVT;
 13 is  
14              String the eventType = null ;
 15  
16              Switch (event.state ()) {
 . 17                  Case READER_IDLE:
 18 is                      the eventType = "read idle" ;
 . 19                      BREAK ;
 20 is                  Case WRITER_IDLE:
 21 is                      the eventType = "idle write" ;
 22 is                      BREAK ;
23 is                  Case ALL_IDLE:
 24                      the eventType = "Idle reader" ;
 25                      BREAK ;
 26 is              }
 27  
28              System.out.println (ctx.channel () of the remoteAddress () + "timeout event:." + The eventType);
 29  
30              ctx.channel () .close ();
 31 is          }
 32      }
 33 is }