Spring集成Netty

这里主要说使用Netty作为服务端的情况，主要思路：

• 把Netty需要的资源封装到一个Server类中
• 基于Spring Bean的生命周期，在Bean创建的时候启动Netty，在Bean销毁的时候关闭Netty

示例：

package com.semonx.netty;
import java.net.InetSocketAddress;
import javax.annotation.PostConstruct;
import javax.annotation.PreDestroy;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;
import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelOption;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.nio.NioServerSocketChannel;
@Component
public class NewTankServer {
    private final static Logger LOGGER = LoggerFactory.getLogger(NewTankServer.class);
    private EventLoopGroup parentGroup = new NioEventLoopGroup();
    private EventLoopGroup childGroup = new NioEventLoopGroup();
    private int port = 7707;
    @PostConstruct
    public void start() throws InterruptedException {
        ServerBootstrap bootstrap = new ServerBootstrap()
                .group(parentGroup, childGroup)
                .localAddress(new InetSocketAddress(port))
                .channel(NioServerSocketChannel.class)
                .childOption(ChannelOption.SO_KEEPALIVE, true)
                .childHandler(new ServerInitializer());
        ChannelFuture future = bootstrap.bind().sync();
        if (future.isSuccess()) {
            LOGGER.info("服务启动成功。监听端口: " + port);
        }
    }
    @PreDestroy
    public void destroy() {
        parentGroup.shutdownGracefully().syncUninterruptibly();
        childGroup.shutdownGracefully().syncUninterruptibly();
        LOGGER.info("服务成功停止");
    }
}