Spring Integration和JPA事务

Question

I'm using Spring integration to receive XML formal XMPP messages :

<int-xmpp:inbound-channel-adapter id="xmppInboundAdapter" channel="xmppInbound" xmpp-connection="xmppConnection" auto-startup="true" />
<int:channel id="xmppInbound" />
<int:service-activator ref="messageRouterService" input-channel="xmppInbound" />

I have already some persistence features and it works (storing messages in database, analysing message compared to what's in database, ...).

Now I have a method which need to be transactional because I need to initialize 2 collections related to 1 entity, so the second collection is lazy initialized by calling a method on it.

This works fine in JUnit, but what do I need to do to make it work in the main code ? Can I just put @Transactional at any level, or does it need to be at the root of the whole process or even declared in some way in the inbound adapter ?

Answer 1

If your hard work with JPA and database is really just in the mentioned messageRouterService , then it is indeed should be enough to mark that service method with the @Transactional annotation and refer properly to your JpaTransactionManager .

If think to make the whole flow as transactional, then it isn't possible starting with the <int-xmpp:inbound-channel-adapter> because there is no hooks to inject TransactionInterceptor . However you can use a TransactionInterceptorBuilder(true) to produce a TransactionHandleMessageAdvice which will wraps the whole sub-flow starting with the adviced endpoint via its <request-handler-advice-chain> : https://docs.spring.io/spring-integration/docs/5.0.6.RELEASE/reference/html/messaging-endpoints-chapter.html#message-handler-advice-chain