[OPENJPA-2227] OpenJPA doesn't find custom SequenceGenerators

• Type: Bug
• Status: Closed
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: 2.0.0, 2.1.0, 2.2.0
• Fix Version/s: 2.1.2, 2.2.1, 2.3.0
• Component/s: kernel
• Environment: WebSphere Application Server V8.0 and V8.5
• Assignee: Jody Grassel
• Reporter: Jens Leisenberg
• Created: 09/Jul/12 19:24
• Updated: 24/Aug/12 00:21
• Resolved: 24/Aug/12 00:20

Description

I'm trying to use a custom SequenceGenerator within an enterprise application using openJPA (providing by WebSphere).

When defining a custom Sequence a ClassNotFoundException (for the Sequence class) will be thrown when trying to insert data into the database.

ExampleConfiguration:

@Entity
@SequenceGenerator(name="MySequence", sequenceName="org.apache.openjpa.generator.UIDGenerator()")
public class Customer implements Serializable {
    @Id
    @GeneratedValue(strategy=GenerationType.SEQUENCE, generator="MySequence")
    private long id;

The example will produce the stacktrace attached.

It seems that the wrong class loader is used to instantiate the custom sequence class. A very similar issue seems to be: OPENJPA-758. With JavaSE (JUnit) all is working fine, but after deploying into WAS the Exception will occur.

I think within the method SequenceMetaData.instantiate(Classloader envLoader) the JavaTypes.classForName() -method with parameter mustExist=false should be used instead of the pure Class.forName() call. But I'm not sure about the Metadata-parameter needed for this method call.