Hi all... does eclipselink support caching results of report queries? I could swear I've done this in the past but attempting with a recent eclipselink v2.1.1 and some JPA code I was getting an odd error. Since The previous times I've worked with query caching it was with older versions of toplink/eclipselink that did not use JPA, but used the native query interface.
I reimplemented code as native eclipselink queries and oddly I get the same error. Error and fullstack trace follow, but the error only occurs when caching has been turned on for the query, otherwise it works fine and returns results, albeit it generating db queries and retrieving results from the db on every query execution.
Exception [EclipseLink-26] (Eclipse Persistence Services - 2.1.1.v20100817-r8050): org.eclipse.persistence.exceptions.DescriptorException
Exception Description: Trying to get value for instance variable [id] of type [long] from the object [org.eclipse.persistence.queries.ReportQueryResult]. The specified object is not an instance of the class or interface declaring the underlying field.
Mapping: org.eclipse.persistence.mappings.DirectToFieldMapping[id-->
MESSAGE.ID]
Descriptor: RelationalDescriptor(com.phillipross.testing.model.Message --> [DatabaseTable(MESSAGE)])
at org.eclipse.persistence.exceptions.DescriptorException.illegalArgumentWhileGettingValueThruInstanceVariableAccessor(DescriptorException.java:629)
at org.eclipse.persistence.internal.descriptors.InstanceVariableAttributeAccessor.getAttributeValueFromObject(InstanceVariableAttributeAccessor.java:79)
at org.eclipse.persistence.mappings.DatabaseMapping.getAttributeValueFromObject(DatabaseMapping.java:497)
at org.eclipse.persistence.mappings.foundation.AbstractDirectMapping.valueFromObject(AbstractDirectMapping.java:1218)
at org.eclipse.persistence.internal.descriptors.ObjectBuilder.extractPrimaryKeyFromObject(ObjectBuilder.java:2133)
at org.eclipse.persistence.internal.sessions.UnitOfWorkImpl.registerExistingObject(UnitOfWorkImpl.java:3936)
at org.eclipse.persistence.queries.ReadAllQuery.execute(ReadAllQuery.java:368)
at org.eclipse.persistence.queries.ObjectLevelReadQuery.executeInUnitOfWork(ObjectLevelReadQuery.java:1112)
at org.eclipse.persistence.internal.sessions.UnitOfWorkImpl.internalExecuteQuery(UnitOfWorkImpl.java:2909)
at org.eclipse.persistence.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1291)
at org.eclipse.persistence.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1273)
at org.eclipse.persistence.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1233)
at com.phillipross.testing.TestPersistence.testJpa(TestPersistence.java:53)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.testng.internal.MethodHelper.invokeMethod(MethodHelper.java:640)
at org.testng.internal.Invoker.invokeMethod(Invoker.java:627)
at org.testng.internal.Invoker.invokeTestMethod(Invoker.java:799)
at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:1103)
at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:137)
at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:121)
at org.testng.TestRunner.runWorkers(TestRunner.java:1098)
at org.testng.TestRunner.privateRun(TestRunner.java:727)
at org.testng.TestRunner.run(TestRunner.java:581)
at org.testng.SuiteRunner.runTest(SuiteRunner.java:315)
at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:310)
at org.testng.SuiteRunner.privateRun(SuiteRunner.java:272)
at org.testng.SuiteRunner.run(SuiteRunner.java:221)
at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:40)
at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:83)
at org.testng.internal.thread.ThreadUtil$CountDownLatchedRunnable.run(ThreadUtil.java:151)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:637)
at sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(UnsafeFieldAccessorImpl.java:146)
at sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(UnsafeFieldAccessorImpl.java:150)
at sun.reflect.UnsafeFieldAccessorImpl.ensureObj(UnsafeFieldAccessorImpl.java:37)
at sun.reflect.UnsafeLongFieldAccessorImpl.getLong(UnsafeLongFieldAccessorImpl.java:42)
at sun.reflect.UnsafeLongFieldAccessorImpl.get(UnsafeLongFieldAccessorImpl.java:18)
at java.lang.reflect.Field.get(Field.java:358)
at org.eclipse.persistence.internal.descriptors.InstanceVariableAttributeAccessor.getAttributeValueFromObject(InstanceVariableAttributeAccessor.java:76)
... 34 more
