Phillip Ross-4 wrote:
>
> Posting this to the correct list may get better response :)
>
> 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.
> Internal Exception: java.lang.IllegalArgumentException: Can not set long
> field
com.phillipross.testing.model.Message.id to
> org.eclipse.persistence.queries.ReportQueryResult
> 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)
>
>
