Runtime Enhancement without <class> entries in persistence.xml fails while
attempting to process non-Entity classes
-------------------------------------------------------------------------------------------------------------------
Key: OPENJPA-97
URL: https://issues.apache.org/jira/browse/OPENJPA-97
Project: OpenJPA
Issue Type: Bug
Components: jpa
Reporter: Kevin Sutter
Priority: Minor
When using dynamic Runtime Enhancement (-javaagent) and not having the explicit
set of classes defined in persistence.xml, the processing gets sick once in a
while. It starts off fine with the appropriate warning...
160 my persistence unit INFO [main] openjpa.Enhance - You have enabled
runtime enhancement, but have not specified the set of persistent classes.
OpenJPA must look for metadata for every loaded class, which might increase
class load times significantly.
It then starts parsing (and processing) every package and class that gets
loaded...
210 my persistence unit INFO [main] openjpa.MetaData - Parsing class
"org.eclipse.jdt.internal.junit.runner.RemoteTestRunner".
210 my persistence unit INFO [main] openjpa.MetaData - Parsing package
"org.eclipse.jdt.internal.junit.runner.RemoteTestRunner".
230 my persistence unit INFO [main] openjpa.MetaData - Parsing class
"org.eclipse.jdt.internal.junit.runner.MessageSender".
230 my persistence unit INFO [main] openjpa.MetaData - Parsing class
"org.eclipse.jdt.internal.junit.runner.IVisitsTestTrees".
230 my persistence unit INFO [main] openjpa.MetaData - Parsing class
"org.eclipse.jdt.internal.junit.runner.IListensToTestExecutions".
:
:
But, it also hits "warnings" similar to the following:
530 my persistence unit WARN [main] openjpa.Enhance - An exception was
thrown while attempting to perform class file transformation on "$Proxy3":
<0|false|0.0.0> org.apache.openjpa.util.GeneralException: $Proxy3
at
org.apache.openjpa.enhance.PCClassFileTransformer.needsEnhance(PCClassFileTransformer.java:179)
at
org.apache.openjpa.enhance.PCClassFileTransformer.transform(PCClassFileTransformer.java:117)
at
sun.instrument.TransformerManager.transform(TransformerManager.java:141)
at
sun.instrument.InstrumentationImpl.transform(InstrumentationImpl.java:174)
at java.lang.reflect.Proxy.defineClass0(Native Method)
at java.lang.reflect.Proxy.getProxyClass(Proxy.java:515)
at java.lang.reflect.Proxy.newProxyInstance(Proxy.java:592)
at
com.ibm.oti.reflect.AnnotationHelper.getAnnotation(AnnotationHelper.java:34)
at
com.ibm.oti.reflect.AnnotationHelper.getDeclaredAnnotations(AnnotationHelper.java:50)
at com.ibm.oti.reflect.Method.getDeclaredAnnotations(Method.java:31)
at java.lang.reflect.Method.getDeclaredAnnotations(Method.java:704)
at
java.lang.reflect.AccessibleObject.getAnnotations(AccessibleObject.java:191)
at com.ibm.oti.reflect.Method.getAnnotation(Method.java:20)
at java.lang.reflect.Method.getAnnotation(Method.java:693)
at
org.junit.internal.runners.TestIntrospector.getTestMethods(TestIntrospector.java:28)
at
org.junit.internal.runners.TestClassMethodsRunner.<init>(TestClassMethodsRunner.java:27)
at
org.junit.internal.runners.TestClassRunner.<init>(TestClassRunner.java:20)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at
sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:67)
at
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:521)
at
org.junit.internal.requests.ClassRequest.getRunner(ClassRequest.java:26)
at
org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.<init>(JUnit4TestReference.java:26)
at
org.eclipse.jdt.internal.junit4.runner.JUnit4TestClassReference.<init>(JUnit4TestClassReference.java:24)
at
org.eclipse.jdt.internal.junit4.runner.JUnit4TestLoader.createTest(JUnit4TestLoader.java:34)
at
org.eclipse.jdt.internal.junit4.runner.JUnit4TestLoader.loadTests(JUnit4TestLoader.java:24)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:445)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:673)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:386)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:196)
Caused by: java.lang.ClassNotFoundException: $Proxy3
at java.lang.Class.forName(Class.java:160)
at
org.apache.openjpa.enhance.PCClassFileTransformer.needsEnhance(PCClassFileTransformer.java:171)
... 29 more
There are similar ClassNotFoundExceptions for the following classes that were
loaded (in my test scenario):
sun.reflect.GeneratedMethodAccessor1
sun.reflect.GeneratedConstructorAccessor1
sun.reflect.GeneratedConstructorAccessor2
sun.reflect.GeneratedConstructorAccessor3
sun.reflect.GeneratedConstructorAccessor4
$Proxy7
$Proxy8
$Proxy9
Since these are obviously not Entities, maybe we should just eat these
exceptions. That is, assume that any errors that happen during the parsing
phase just indicate that they are not Entities and continue on. Currently, the
"warning" message and call stack look a bit more drastic than what they really
are.
BTW, the rest of the runtime enhancement worked just fine. It parsed several
hundred class files as they were being loaded. It found the one class file
that I was interested in and successfully enhanced it. So, the processing
worked okay. It's just kind of messy.
Kevin
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