Spring Integration : How to guarantee the transaction two more jdbc-outbound-gateway?

Question

I have the following pattern

I have two kinds of databases. One is a int

Answer 1

Add a QueueChannel somewhere upstream (i.e. before the pub sub channel for tx2) and use a poller to start the transaction.

Alternatively, insert a transactional gateway...

public interface TX {
    @Transactional
    Message exchange(Message m);
}

You'll need to enable transactions in the second case.