一、服务器启动示例:
public class MySocketServer { protected static Logger logger = LoggerFactory.getLogger(MySocketServer.class); public void start(int port) { EventLoopGroup bossGroup = new NioEventLoopGroup(1); EventLoopGroup workerGroup = new NioEventLoopGroup(); try { ServerBootstrap b = new ServerBootstrap(); b.group(bossGroup, workerGroup).channel(NioServerSocketChannel.class) .childHandler(new SocketServerInitializer()); logger.debug("server side socket start successful on port {}", port); b.bind(port).sync().channel().closeFuture().sync(); } catch (InterruptedException e) { e.printStackTrace(); logger.error("{}", e.getMessage()); } finally { bossGroup.shutdownGracefully(); workerGroup.shutdownGracefully(); } } }
二、各种业务Handler:
public class SocketServerInitializer extends ChannelInitializer<SocketChannel> { @Override protected void initChannel(SocketChannel ch) throws Exception { ch.pipeline() .addLast(new IdleStateHandler(10, 0, 0, TimeUnit.SECONDS)) // 构造一个超时event消息 .addLast(new IdleStateTrigger()) // 处理超时event消息 .addLast(new StringDecoder()) .addLast(new StringEncoder()) .addLast(new ServerHandler()); } }
三、读空闲(超过10s)的事件处理
public class IdleStateTrigger extends ChannelInboundHandlerAdapter { protected static Logger logger = LoggerFactory.getLogger(IdleStateTrigger.class); @Override public void userEventTriggered(ChannelHandlerContext ctx, Object evt) throws Exception { if (evt instanceof IdleStateEvent) { IdleState state = ((IdleStateEvent) evt).state(); logger.debug("state is {}", state.name()); if (state == IdleState.READER_IDLE) { ctx.close(); // 如果是超过10s没有读到数据,关闭客户端连接 throw new Exception("idle exception"); } } else { super.userEventTriggered(ctx, evt); } } }
附录、超时功能的快捷实现
使用自带的ReadTimeoutHandler
public class SocketServerInitializer extends ChannelInitializer<SocketChannel> { @Override protected void initChannel(SocketChannel ch) throws Exception { ch.pipeline() .addLast(new StringDecoder()) .addLast(new StringEncoder()) .addLast(new ReadTimeoutHandler(10, TimeUnit.SECONDS)) .addLast(new ServerHandler()); } }
原文地址:https://www.cnblogs.com/yoyotl/p/7514836.html
时间: 2024-10-17 08:25:59