Add Jackson 3 support and deprecate Jackson 2 APIs

[artembilan]

This is where we use it:

• ConfigurableCompositeMessageConverter
• WebSocketInboundChannelAdapter
• WebSocketOutboundMessageHandler
• StompInboundChannelAdapterWebSocketIntegrationTests

Has to be migrated to a new JacksonJsonMessageConverter.

[anthologia]

Hi! Would it be okay if I work on this issue?

Is this related to spring-projects/spring-framework#33798?

[artembilan]

That's correct.
Feel free to open Pull Request.
However we need to be careful if this has to be done before: spring-projects/spring-framework#34963.

[artembilan]

Repurpose an issue to a broader subject.
Essentially, we have to provide Jackson 3 support and deprecate existing Jackson 2 API.
More info in: spring-projects/spring-framework#33798

[anthologia]

Hi @artembilan!

I see the scope got expanded. Are we looking at migrating Jackson 2 to 3 across all Spring Integration modules for this issue?

[artembilan]

Thank you for looking into this, @anthologia !

Well, it is not about migration any more.
We have to add Jackson 3 dependency, implement Jackson 3 mirrored API where we Jackson 2 and deprecate those Jackson 2 API.
In between we can migrate to a new JacksonJsonMessageConverter where we see deprecation warnings for the MappingJackson2MessageConverter.

The most important part that Jackson 3 has to be managed as dependency to make everything working.

[anthologia]

Thanks for clarifying! I'll fix the compile warning issues (in this milestone) first, then get into this.

[artembilan]

I'll fix the compile warning issues

Thanks.
I hope you mean warnings related to this issue, not many others like JUnit 4 deprecations, or this-espace because of Java 24 upgrade.

[anthologia]

Oh, I meant I'd handle the this-escape warnings in #10069 first, then come back to this Jackson issue. I've already started on the this-escape issue. I wasn't planning to mix them together..!

[artembilan]

Good.
Would be great if you would comment on that issue that you are working on it.
This way anyone interested would not do the same effort 😄