最近有朋友向我询问一些Netty与SpringBoot整合的相关问题,这里,我就总结了一下基本整合流程,也就是说,这篇文章 ,默认大家是对netty与Spring,SpringMVC的整合是没有什么问题的。现在,就进入正题吧。
Server端:
总的来说,服务端还是比较简单的,自己一共写了三个核心类。分别是
- NettyServerListener:服务启动监听器
- ServerChannelHandlerAdapter:通道适配器,主要用于多线程共享
- RequestDispatcher:请求分排器
下面开始集成过程:
在pom.xml中添加以下依赖
<dependency> <groupId>io.netty</groupId> <artifactId>netty-all</artifactId> <version>5.0.0.Alpha2</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-configuration-processor</artifactId> <optional>true</optional> </dependency>
让SpringBoot的启动类实现CommandLineRunner接口并重写run方法,比如我的启动类是CloudApplication.java
@SpringBootApplication public class CloudApplication implements CommandLineRunner { public static void main(String[] args) { SpringApplication.run(CloudApplication.class, args); } @Override public void run(String... strings) { } }
创建类NettyServerListener.java
// 读取yml的一个配置类 import com.edu.hart.modules.constant.NettyConfig; // Netty连接信息配置类 import com.edu.hart.modules.constant.NettyConstant; // import com.edu.hart.rpc.util.ObjectCodec; import io.netty.bootstrap.ServerBootstrap; import io.netty.channel.ChannelFuture; import io.netty.channel.ChannelInitializer; import io.netty.channel.ChannelPipeline; import io.netty.channel.EventLoopGroup; import io.netty.channel.nio.NioEventLoopGroup; import io.netty.channel.socket.SocketChannel; import io.netty.channel.socket.nio.NioServerSocketChannel; import io.netty.handler.codec.LengthFieldBasedFrameDecoder; import io.netty.handler.codec.LengthFieldPrepender; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.stereotype.Component; import javax.annotation.PreDestroy; import javax.annotation.Resource; /** * 服务启动监听器 * * @author 叶云轩 */ @Component public class NettyServerListener { /** * NettyServerListener 日志输出器 * * @author 叶云轩 create by 2017/10/31 18:05 */ private static final Logger LOGGER = LoggerFactory.getLogger(NettyServerListener.class); /** * 创建bootstrap */ ServerBootstrap serverBootstrap = new ServerBootstrap(); /** * BOSS */ EventLoopGroup boss = new NioEventLoopGroup(); /** * Worker */ EventLoopGroup work = new NioEventLoopGroup(); /** * 通道适配器 */ @Resource private ServerChannelHandlerAdapter channelHandlerAdapter; /** * NETT服务器配置类 */ @Resource private NettyConfig nettyConfig; /** * 关闭服务器方法 */ @PreDestroy public void close() { LOGGER.info("关闭服务器...."); //优雅退出 boss.shutdownGracefully(); work.shutdownGracefully(); } /** * 开启及服务线程 */ public void start() { // 从配置文件中(application.yml)获取服务端监听端口号 int port = nettyConfig.getPort(); serverBootstrap.group(boss, work) .channel(NioServerSocketChannel.class) .option(ChannelOption.SO_BACKLOG, 100) .handler(new LoggingHandler(LogLevel.INFO)); try { //设置事件处理 serverBootstrap.childHandler(new ChannelInitializer<SocketChannel>() { @Override protected void initChannel(SocketChannel ch) throws Exception { ChannelPipeline pipeline = ch.pipeline(); pipeline.addLast(new LengthFieldBasedFrameDecoder(nettyConfig.getMaxFrameLength() , 0, 2, <mark>本文来源gaodaimacom搞#^代%!码&网(</mark>0, 2)); pipeline.addLast(new LengthFieldPrepender(2)); pipeline.addLast(new ObjectCodec()); pipeline.addLast(channelHandlerAdapter); } }); LOGGER.info("netty服务器在[{}]端口启动监听", port); ChannelFuture f = serverBootstrap.bind(port).sync(); f.channel().closeFuture().sync(); } catch (InterruptedException e) { LOGGER.info("[出现异常] 释放资源"); boss.shutdownGracefully(); work.shutdownGracefully(); } } }