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Spring orm toplink to eclipselink [message #1858511]

Wed, 05 April 2023 13:54

Sanjana C

Messages: 31
Registered: December 2022

Member

Hi,

As a part of migration from toplink to eclipselink we are using few apis of toplink from spring orm framework in project .

In few classes we are using
org.springframework.orm.toplink.UnitOfWorkCallback() class which should implemet doInUnitOfWork(oracle.toplink.sessions.UnitOfWork unitOfWork) abstract method and org.springframework.orm.toplink.TopLinkCallbackinterface where we implement
doInTopLink(Session session) method.

But when using eclipselink with spring jpa , how can we replace this above classes ?

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Re: Spring orm toplink to eclipselink [message #1858524 is a reply to message #1858511]

Wed, 05 April 2023 19:07

Chris Delahunt

Messages: 54
Registered: December 2021

Member

You are not replacing TopLink with EclipseLink, but replacing Spring's TopLink framework with JPA centered ones - Spring essentially removed native TopLink/EclipseLink api support, and instead built EclipseLink support into its existing JPA framework.

In this case, you would use https://docs.spring.io/spring-framework/docs/2.5.x/javadoc-api/org/springframework/orm/jpa/JpaCallback.html and use the EntityManager api. This just wraps UnitOfWork instances - if you want to continue using UOWs directly, you just need to unwrap it:

UnitOfWork uow = entityManager.unwrap(UnitOfWork.class);

Or via api described here https://wiki.eclipse.org/EclipseLink/Examples/JPA/EMAPI#JPA_1.0

Best Regards,
Chris

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