CODEWITHSUNDEEP
javaspringspring-integration
alturkovic
alturkovic

Reputation: 1120

Spring TCP send data over incoming connection

How can I configure Spring to receive a TCP connection and then send data over it? I have data stored in a RabbitMQ queue, and I need to send this data over an incoming connection.

I assume client is working as client-mode=true according to the documentation. I have found an example on how to behave as a client in this use-case, but I can't find an example for the server side. Could anyone point me in the right direction?

I am not sure if this is a standard use-case, it seems backwards to me that the client is starting the connection and not the server, but I have little experience with TCP.

Upvotes: 0

Views: 435

Answers (1)

Gary Russell
Gary Russell

Reputation: 174494

You don't need client mode; that's for when you want an inbound adapter to initiate the socket open. Use a TcpSendingMessageHandler with a server connection factory, to listen on the port.

Add an ApplicationListener bean that listens for a TcpConnectionOpenEvent see TCP Connection Events.

The event will have the connection id, which you must capture and set in a message header (IpHeaders.CONNECTION_ID) for any messages sent, so the adapter knows where to send the message.

Upvotes: 1

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