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migrating from openjpa to eclipselink [message #1854177]

Thu, 04 August 2022 18:18

arun rajan

Messages: 2
Registered: August 2022

Junior Member

I was migrating from openjpa (2.2.2) to eclipselink(2.5.2) in my legacy project.
During migration, I could see following code snippet which is specific to openjpa:

OpenJPAEntityManager kem = OpenJPAPersistence.cast(em);
kem.getFetchPlan().addField(Test.class, "stringvalue");
kem.getFetchPlan().addField(Test.class, "other string value");
if (!(em instanceof OpenJPAEntityManager)) {
kem.close();
}

Please help to find corresponding eclipselink related code to this code snippet.

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Re: migrating from openjpa to eclipselink [message #1854234 is a reply to message #1854177]

Mon, 08 August 2022 17:19

Chris Delahunt

Messages: 44
Registered: December 2021

Member

I don't know why they would close the EM if it isn't an instance of OpenJPAEntityManager, but the rest looks like something that should be converted to JPA specifics through the use of fetch joins (if these are relationships) in queries, or entity (load and fetch) graphs passed to queries. You can modify descriptors and mappings in EclipseLink, but I wouldn't advise it, as such changes are shared in many cases and these involve initialization.

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