Spring集成TCP

Question

我想设置Spring服务器-客户端应用程序。我需要服务器监听端口上的传入消息，例如6666，以及客户机在另一个端口上发送消息，例如7777。我已经跟踪了文档，但是我遇到了客户端希望接收响应的问题，但实际上，另一端只会接收来自客户端的消息，不会发送任何响应。所以，基本上，我经常会收到这样的错误：

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

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

我找到了类似问题的这答案，所以我尝试将答案集成到我的代码中。这是我的Config课程：

@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) {}
}

}

我是这样使用客户端发送消息的：

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

如何设置客户端，使其不等待响应？

Answer 1

见参考手册。

网关用于请求/应答交互，信道适配器用于单向交互.

使用TcpSendingMessageHandler和TcpReceivingChannelAdapter代替入站和出站网关。