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javaeclipsegoogle-app-enginedatanucleus

Datanucleus v4 with GAE

I'm developping an application with GAE/Datanucleus/cloudSQL.

Datanucelus version is 3.1.3 because newest App Engine SDK (1.9.11) includes this version, but I was advised to use Datanucleus v4 in this question.

I removed 3.1.3 jars from war/WEB-INF/lib and added 4.0.2 jars to the same folder. When I run the application, it seems working well.

But eclipse is complaining errors as belows.

The App Engine SDK JAR datanucleus-api-jpa-3.1.3.jar is missing in the WEB-INF/lib directory
The App Engine SDK JAR datanucleus-core-3.1.3.jar is missing in the WEB-INF/lib directory
The App Engine SDK JAR datanucleus-api-jdo-3.1.3.jar is missing in the WEB-INF/lib directory

If I add the 3.1.3 to war/WEB-INF/lib, eclipse error has gone, but application fails because of multiple JAR versions.

Can anybody tell me the straightforward way to use Datanucleus v4 with GAE?

Solution

  • See this page which says "use DataNucleus JDO/JPA to access the datastore" ? Well untick it because that is GAE/Datastore - not that Google's plugin tells you. Then put whatever jars you need for your JPA implementation into the CLASSPATH and all should be fine.