John Ross created ARIES-1019:
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Summary: JPA weaving hook must be called before proxy weaving hook.
Key: ARIES-1019
URL: https://issues.apache.org/jira/browse/ARIES-1019
Project: Aries
Issue Type: Bug
Components: JPA, Proxy
Reporter: John Ross
Caused by: <openjpa-2.2.2-SNAPSHOT-r422266:1446295 nonfatal general error>
org.apache.openjpa.util.GeneralException: An error occurred while enhancing
itemjpa.ItemJPA. Exception message: java.lang.ClassNotFoundException:
org.apache.aries.proxy.weaving.WovenProxy
at org.apache.openjpa.enhance.PCEnhancer.run(PCEnhancer.java:578)
at
org.apache.openjpa.enhance.PCClassFileTransformer.transform0(PCClassFileTransformer.java:153)
at
org.apache.openjpa.enhance.PCClassFileTransformer.transform(PCClassFileTransformer.java:126)
at
org.apache.openjpa.persistence.PersistenceProviderImpl$ClassTransformerImpl.transform(PersistenceProviderImpl.java:290)
at
org.apache.aries.jpa.container.weaving.impl.WrappingTransformer.transform(WrappingTransformer.java:80)
at
org.apache.aries.jpa.container.weaving.impl.JPAWeavingHook.weave(JPAWeavingHook.java:71)
... 48 more
Caused by: java.lang.IllegalArgumentException:
java.lang.ClassNotFoundException: org.apache.aries.proxy.weaving.WovenProxy
at serp.util.Strings.toClass(Strings.java:164)
at serp.util.Strings.toClass(Strings.java:108)
at serp.bytecode.BCClass.getDeclaredInterfaceTypes(BCClass.java:740)
at org.apache.openjpa.enhance.PCEnhancer.run(PCEnhancer.java:537)
... 53 more
This issue occurs when the Apache Aries Proxy weaving hook gets called before
the Apache Aries JPA weaving hook. Proxy weaves the class with the WovenProxy
interface and adds the necessary dynamic package imports. JPA then gets called
and uses PCEnhancer which, in turn, calls BCClass.getDeclaredInterfaceTypes,
which ultimately calls Class.forName using the woven interface's name. The
class loader is from the bundle whose class is being woven. Per the OSGi spec,
dynamic imports do not take effect until after the entire weaving process is
complete. Consequently, the bundle's class loader does not yet have visibility
to the class.
One solution would be to ensure that the jpa weaving hook is always called
before the proxy weaving hook using the service ranking property.
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