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Date: Tue, 31 Jul 2012 14:35:34 +0000 (UTC)
From: "Jody Grassel (JIRA)" <jira@apache.org>
To: dev@openjpa.apache.org
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Subject: [jira] [Updated] (OPENJPA-2227) OpenJPA doesn't find custom
 SequenceGenerators
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     [ https://issues.apache.org/jira/browse/OPENJPA-2227?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jody Grassel updated OPENJPA-2227:
----------------------------------

    Attachment: OPENJPA-2227-2.2.x.patch

Uploaded copy of the patch for 2.2.x, as integration for this branch needs to be delayed.
                
> OpenJPA doesn't find custom SequenceGenerators
> ----------------------------------------------
>
>                 Key: OPENJPA-2227
>                 URL: https://issues.apache.org/jira/browse/OPENJPA-2227
>             Project: OpenJPA
>          Issue Type: Bug
>          Components: kernel
>    Affects Versions: 2.0.0, 2.1.0, 2.2.0
>         Environment: WebSphere Application Server V8.0 and V8.5
>            Reporter: Jens Leisenberg
>            Assignee: Jody Grassel
>            Priority: Blocker
>         Attachments: ClassNotFoundException.txt, OPENJPA-2227-2.2.x.patch
>
>
> 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:
> {code}
> @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;
> {code}
> 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.

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