服务启动入口 RestServerTest

完整代码
https://gitee.com/dyyx/nettyrest/blob/master/src/test/java/org/dyyx/nrest/RestServerTest.java

netty 部分 核心代码
https://gitee.com/dyyx/nettyrest/blob/master/src/main/java/org/dyyx/nrest/core/HandlerInitializer.java



@Override
protected void initChannel(SocketChannel ch) throws Exception {
        ChannelPipeline pipeline = ch.pipeline();
        pipeline.addLast("decoder", new HttpRequestDecoder());
        pipeline.addLast("aggregator", new HttpObjectAggregator(maxContentLength));
        pipeline.addLast("encoder", new HttpResponseEncoder());
        // 启用gzip（由于使用本地存储文件，不能启用gzip）
        //pipeline.addLast(new HttpContentCompressor(1));
        pipeline.addLast(new ChunkedWriteHandler());
        // 将HttpRequestHandler放在业务线程池中执行，避免阻塞worker线程
        pipeline.addLast(eventExecutorGroup, "httpRequestHandler", new HttpRequestHandler());
}


业务线程池
ChannelPipeline addLast(EventExecutorGroup group, String name, ChannelHandler handler);  
group the which will be used to execute the  ChannelHandler


ChannelInboundHandler按照注册的先后顺序执行
ChannelOutboundHandler按照注册的先后顺序逆序执行
InboundHandler :  HttpRequestDecoder HttpObjectAggregator HttpHandler 
OutboundHandler:  HttpContentCompressor HttpResponseEncoder

Handler 使用 注意点
ChannelInboundHandler之间的传递  ctx.fireChannelRead(msg) 
调用ctx.write(msg) 传递到ChannelOutboundHandler
ctx.write() 后，需要调用flush()方法才能立即执行
ChannelOutboundHandler 注册时需要放在最后一个ChannelInboundHandler之前，否则无法传递到ChannelOutboundHandler
Handler的消费处理放在最后一个处理


telnet 使用业务线程池的例子
https://gitee.com/dyyx/netty4demo/blob/master/src/main/java/dyyx/telnet/TelnetServerHandlerUseThreadPool.java
https://gitee.com/dyyx/netty4demo/blob/master/src/main/java/dyyx/telnetclient/TelnetClient.java



HelloController


@RestController
public class HelloController { 
    @GetMapping("/hello")
    @JsonResponse
    public ResponseEntity<String> hello() {   
        return ResponseEntity.ok().build("hello,netty-rest,"+LocalDateTime.now());
    }





最简单的http server
https://gitee.com/dyyx/netty4demo/blob/master/src/main/java/dyyx/http/HttpServerInit.java

HttpServerInit

@Override
public void initChannel(SocketChannel ch) {
    ChannelPipeline p = ch.pipeline();
    // HTTP 服务的解码器
    p.addLast(new HttpServerCodec());
    // HTTP 消息的合并处理
    p.addLast(new HttpObjectAggregator(2048)); 
    // p.addLast(new HttpServerHandler());  
    p.addLast(new HttpServerHandler2());
} 




  netty4耗时业务处理实例 
  netty耗时任务处理