无法在 reactor-netty 版本 0.9.10 上设置 WriteTimeout

Question

I have written a Reactive API using Spring WebFlux version 2.3.0.RELEASE having reactor-netty version 0.9.10 . As part of the API's SLA, I want to timeout the request if the Server takes more than the stipulated configured WriteTimeout.

Sharing the code snipped below where I have implemented a customizer for NettyReactiveWebServerFactory.

@Bean
  public WebServerFactoryCustomizer serverFactoryCustomizer() {
    return new NettyTimeoutCustomizer();
  }

  class NettyTimeoutCustomizer implements WebServerFactoryCustomizer<NettyReactiveWebServerFactory> {

    @Override
    public void customize(NettyReactiveWebServerFactory factory) {
      int connectionTimeout = 1000;
      int writeTimeout = 1;
          factory.addServerCustomizers(server -> server.tcpConfiguration(tcp ->
              tcp.option(ChannelOption.CONNECT_TIMEOUT_MILLIS, connectionTimeout)
                  .doOnConnection(connection ->
                      connection.addHandlerLast(new WriteTimeoutHandler(writeTimeout)))));
    }
  }

In spite of the Customizer, the WriteTimeout is Not Working for the API.

Answer 1

Instead of defining a WebServerFactoryCustomizer bean, create a bean of NettyReactiveWebServerFactory to override Spring's auto-configuration.

  @Bean
  public NettyReactiveWebServerFactory nettyReactiveWebServerFactory() {
    NettyReactiveWebServerFactory webServerFactory = new NettyReactiveWebServerFactory();
    webServerFactory.addServerCustomizers(new MyCustomizer());
    return webServerFactory;
  }

Now the MyCustomizer will look something like this:

public class MyCustomizer implements NettyServerCustomizer {

  @Override
  public HttpServer apply(HttpServer httpServer) {
    return httpServer.tcpConfiguration(tcpServer -> tcpServer.option(ChannelOption.CONNECT_TIMEOUT_MILLIS, 1000)
        .bootstrap(serverBootstrap -> serverBootstrap.childHandler(new ChannelInitializer<Channel>() {
          @Override
          protected void initChannel(Channel channel) throws Exception {
            channel.pipeline().addLast("writeTimeoutHandler", new WriteTimeoutHandler(1));
          }
        }))
    );
  }
}

This is the way suggested in the official API doc