Spring Integration TCP doesn't send messages - tcp

Question

I've been trying to create a consumer and a producer using the Spring Integration TCP. I've achived some success on the listening part (I got the message sended by a telnet normally), but when I try to send this same message to the terminal client, nothing happens.
These are my classes:
#EnableIntegration
#IntegrationComponentScan
#Configuration
public class TcpIntegration {
#Value("${tcp.port}")
private Integer port;
#MessagingGateway(defaultRequestChannel="toTcp")
public interface Gateway {
String viaTcp(String in);
}
#Bean
#ServiceActivator(inputChannel="toTcp")
public TcpSendingMessageHandler tcpOutGate(AbstractClientConnectionFactory connectionFactory) {
TcpSendingMessageHandler gate = new TcpSendingMessageHandler();
gate.setConnectionFactory(connectionFactory);
return gate;
}
#Bean
public TcpReceivingChannelAdapter tcpInGate(AbstractServerConnectionFactory connectionFactory) {
TcpReceivingChannelAdapter inGate = new TcpReceivingChannelAdapter();
inGate.setConnectionFactory(connectionFactory);
inGate.setOutputChannel(fromTcp());
return inGate;
}
#Bean
public MessageChannel fromTcp() {
return new DirectChannel();
}
#Bean
public AbstractClientConnectionFactory clientCF() {
return new TcpNetClientConnectionFactory("localhost", this.port);
}
#Bean
public AbstractServerConnectionFactory serverCF() {
return new TcpNetServerConnectionFactory(this.port);
}
}
TcpListener
#MessageEndpoint
#AllArgsConstructor
public class TcpListener {
private final Gateway gateway;
#ServiceActivator(inputChannel = "fromTcp")
public void convert(String payload) {
System.out.println(payload);
gateway.viaTcp(payload);
}
}
Why doesn't it work?

Answer 1

You need to tell the adapter which socket to send the messsage on by setting the ip_connnetionId header.
#ServiceActivator(inputChannel = "fromTcp")
public void convert(String payload, #Header(IpHeaders.CONNECTION_ID String cid) {
System.out.println(payload);
gateway.viaTcp(payload, cid);
}
#MessagingGateway(defaultRequestChannel="toTcp")
public interface Gateway {
#Gateway(#GatewayHeader(IPHeaders.CONNECTION_ID, "#args[1]"))
String viaTcp(String in, String cid);
}
EDIT
My syntax was a little bit off; here's a working example...
#SpringBootApplication
public class So65597331Application {
public static void main(String[] args) {
SpringApplication.run(So65597331Application.class, args);
}
#MessagingGateway(defaultRequestChannel = "toTcp")
public interface Gate {
#Gateway(payloadExpression = "#args[0]",
headers = #GatewayHeader(name = IpHeaders.CONNECTION_ID, expression = "#args[1]"))
String viaTcp(String in, String cid);
}
#Bean
#ServiceActivator(inputChannel = "toTcp")
public TcpSendingMessageHandler tcpOutGate(AbstractServerConnectionFactory connectionFactory) {
TcpSendingMessageHandler gate = new TcpSendingMessageHandler();
gate.setConnectionFactory(connectionFactory);
return gate;
}
#Autowired
private Gate gateway;
#ServiceActivator(inputChannel = "fromTcp")
public void convert(String payload, #Header(IpHeaders.CONNECTION_ID) String cid) {
System.out.println(payload);
gateway.viaTcp(payload, cid);
}
#Bean
public TcpReceivingChannelAdapter tcpInGate(AbstractServerConnectionFactory connectionFactory) {
TcpReceivingChannelAdapter inGate = new TcpReceivingChannelAdapter();
inGate.setConnectionFactory(connectionFactory);
inGate.setOutputChannel(fromTcp());
return inGate;
}
#Bean
public MessageChannel fromTcp() {
return new DirectChannel();
}
#Bean
public AbstractServerConnectionFactory serverCF() {
return new TcpNetServerConnectionFactory(1234);
}
}
$ telnet localhost 1234
Trying ::1...
Connected to localhost.
Escape character is '^]'.
foo
foo
Connection closed by foreign host.