Quarkus: Hibernate ORM extension for Hibernate Types extensions

[Sanne]

Describe the extension
We should have an additional extension to enable the Hibernate Types from Vlad's project at

• https://github.com/vladmihalcea/hibernate-types

(as discussed on the mailing list).

I think we could eventually have the Hibernate ORM extension depend on it automatically (so to pull the dependency in transparently), but I'd prefer to reserve such a move for a future decision; especially as long as this is experimental is should be an explicit opt-in.

@andrejpetras also wondered if:

Would it be possible to avoid the @TypeDef annotation and generate it directly with the Quarkus extension?

I think that would be possible, but haven't explored it in detail. I sugest let's create the extension first, then we can explore such improvements as a follow up.

[quarkusbot]

/cc @gsmet @Sanne

[andrejpetras]

Hi,

I migrated Vlad's Hibernation types as a Quarkus extension.

Source code: https://github.com/lorislab/quarkus-hibernate-types

Changes:

• remove dependencies to old Hibernate versions and add Quarkus dependency
• replace object copy with a Jackson "object copy"
• remove all reflection
• Inject Jackson ObjectMapper from Quarkus Arc CDI container

[famod]

CamelCaseToSnakeCaseNamingStrategy from Vlad's project is also helpful!

@andrejpetras Your extension does not contain this strategy, right?

[andrejpetras]

CamelCaseToSnakeCaseNamingStrategy from Vlad's project is also helpful!

@andrejpetras Your extension does not contain this strategy, right?

@famod I didn't know about this. But it looks like it's a class that could be migrated to the Quarkus.

[andrejpetras]

@Sanne @famod
I started working on it. My branch: https://github.com/andrejpetras/quarkus/tree/9861_hibernate_types/extensions/hibernate-types

I will write the implementation and the tests first, and then we can move it to the right place.
I switch the implementation from Jackson to Jsonb (but I am no sure about this change)

Comments are welcome

[Sanne]

I wonder why things like CamelCaseToSnakeCaseNamingStrategy aren't contributed into Hibernate ORM. It's not that useful to have to include an additional extension just for that?

[akoufa]

@andrejpetras What is the status of this issue ? Are you continuing working on it ?

[andrejpetras]

@akoufa did not have time last month but I hope this weekend I can spend few hours on it.

[andrejpetras]

@Sanne @famod @akoufa
Hi guys, could you please check this branch:
https://github.com/andrejpetras/quarkus/tree/9861_hibernate_types/extensions/hibernate-types

I implemented the first version of this extension (not final), we could use it for a discussion:

• standard deployment and runtime modules
• one of these modules needs to be in the class-path
  
  
  
  • jackson module is JSON impl module for Hibernate Types
  
  
  • jsonb module is JSON implserializer module for Hibernate Types
  
  

I also added an integration test for Hibernate types extension + jackson + postgresql
https://github.com/andrejpetras/quarkus/tree/9861_hibernate_types/integration-tests/hibernate-types-jackson-postgresql

I would like to have feedback from quarkus before I will continue with this approach.