Spring 集成 TCP

我想设置 Spring TCP 服务器客户端应用程序。我需要一个服务器侦听端口上的传入消息，例如 6666，并且客户端在不同的端口上发送消息，例如 7777。我已遵循文档 http://docs.spring.io/spring-integration/reference/html/ip.html#ip-annotation，但我遇到了这样的问题：客户端期望收到响应，但实际上，另一端只会接收来自客户端的消息，而不会发送任何响应。所以，基本上，我不断收到这个错误：

o.s.i.ip.tcp.TcpOutboundGateway          : Tcp Gateway exception

org.springframework.integration.MessageTimeoutException: Timed out waiting for response

I found this https://stackoverflow.com/questions/18974258/write-only-over-a-tcp-connection-with-spring-integration回答类似的问题，所以我尝试将答案集成到我的代码中。这是我的配置类：

@EnableIntegration
@IntegrationComponentScan
@Configuration
public class Config {

private int port = 6666;

@MessagingGateway(defaultRequestChannel = "toTcp")
public interface Gateway {
    String viaTcp(String in);
}

@Bean
@ServiceActivator(inputChannel = "toTcp")
public TcpOutboundGateway tcpOutGate(AbstractClientConnectionFactory connectionFactory) {
    TcpOutboundGateway gate = new TcpOutboundGateway();
    gate.setConnectionFactory(connectionFactory);
    gate.setOutputChannelName("resultToString");
    gate.setRequiresReply(false);

   return gate;
}

@Bean
public TcpInboundGateway tcpInGate(AbstractServerConnectionFactory connectionFactory) {
    TcpInboundGateway inGate = new TcpInboundGateway();
    inGate.setConnectionFactory(connectionFactory);
    inGate.setRequestChannel(fromTcp());

    return inGate;
}

@Bean
public ByteArrayRawSerializer serializer() {
    return new ByteArrayRawSerializer();
}

@Bean
public MessageChannel fromTcp() {
    return new DirectChannel();
}

@MessageEndpoint
public static class Echo {

    @Transformer(inputChannel = "fromTcp", outputChannel = "toEcho")
    public String convert(byte[] bytes) {
        return new String(bytes);
    }

    @ServiceActivator(inputChannel = "toEcho")
    public String upCase(String in) {
        System.out.println("Server received: " + in);
        return in.toUpperCase();
    }

    @Transformer(inputChannel = "resultToString")
    public String convertResult(byte[] bytes) {
        return new String(bytes);
    }

}

@Bean
public AbstractClientConnectionFactory clientCF() {
    TcpNetClientConnectionFactory tcpNet = new TcpNetClientConnectionFactory("localhost", 7777);
    tcpNet.setDeserializer(serializer());
    tcpNet.setSerializer(serializer());
    tcpNet.setSingleUse(true);
    tcpNet.setTaskExecutor(new NullExecutor());
    return tcpNet;
}

@Bean
public AbstractServerConnectionFactory serverCF() {
    TcpNetServerConnectionFactory tcp = new TcpNetServerConnectionFactory(this.port);
    tcp.setSerializer(serializer());
    tcp.setDeserializer(serializer());
    return tcp;
}


public class NullExecutor implements Executor {

    public void execute(Runnable command) {}
}

}

这是我使用客户端发送消息的方式：

@Autowired
private Gateway gateway;
gateway.viaTcp("Some message");

如何设置客户端以便它不等待响应？

See the 参考手册 http://docs.spring.io/spring-integration/reference/html/endpoint-summary.html.

网关用于请求/回复交互，通道适配器用于单向交互。

Use TcpSendingMessageHandler and TcpReceivingChannelAdapter而不是入站和出站网关。