Hi and happy new year to everyone,
I am back with my happy inheritance one more time.
I am using single table inheritance and just in case someone did not
remember the model here is a simplification about it:
abstract SessionLog it has relations to other tables as Log or User
SessionLogApi and SessionLogWeb that inherits from SessionLog they have
specific information about the session type and their own relations
I have found some problems with this kind of mapping but till now I have
always find a way to hack around Cayenne problems with this and today
(we are really near to put the new version with inheritance in
production) I have struck against this exception:
Caused by: org.apache.cayenne.CayenneRuntimeException: [v.3.1B1 May 28
2012 18:42:43] Error creating object of class
'com.proton.ks.persistence.SessionLog'
at
org.apache.cayenne.reflect.PersistentDescriptor.createObject(PersistentDescriptor.java:288)
at
org.apache.cayenne.reflect.LazyClassDescriptorDecorator.createObject(LazyClassDescriptorDecorator.java:73)
at
org.apache.cayenne.access.DataContext.findOrCreateObject(DataContext.java:1178)
at
org.apache.cayenne.access.ObjectResolver.objectFromDataRow(ObjectResolver.java:151)
at
org.apache.cayenne.access.ObjectResolver.objectFromDataRow(ObjectResolver.java:137)
at
org.apache.cayenne.access.ObjectResolver.objectsFromDataRows(ObjectResolver.java:121)
at
org.apache.cayenne.access.ObjectResolver.synchronizedObjectsFromDataRows(ObjectResolver.java:102)
at
org.apache.cayenne.access.ObjectResolver.synchronizedRootResultNodeFromDataRows(ObjectResolver.java:93)
at
org.apache.cayenne.access.DataDomainQueryAction$ObjectConversionStrategy.toResultsTree(DataDomainQueryAction.java:581)
at
org.apache.cayenne.access.DataDomainQueryAction$SingleObjectConversionStrategy.convert(DataDomainQueryAction.java:637)
at
org.apache.cayenne.access.DataDomainQueryAction.interceptObjectConversion(DataDomainQueryAction.java:465)
at
org.apache.cayenne.access.DataDomainQueryAction.execute(DataDomainQueryAction.java:129)
at
org.apache.cayenne.access.DataDomain.onQueryNoFilters(DataDomain.java:754)
at
org.apache.cayenne.access.DataDomain$DataDomainQueryFilterChain.onQuery(DataDomain.java:1003)
at org.apache.cayenne.access.DataDomain.onQuery(DataDomain.java:744)
at
org.apache.cayenne.util.ObjectContextQueryAction.runQuery(ObjectContextQueryAction.java:350)
at
org.apache.cayenne.util.ObjectContextQueryAction.executePostCache(ObjectContextQueryAction.java:106)
at
org.apache.cayenne.util.ObjectContextQueryAction.execute(ObjectContextQueryAction.java:93)
at org.apache.cayenne.access.DataContext.onQuery(DataContext.java:989)
at org.apache.cayenne.access.DataContext.performQuery(DataContext.java:978)
at
org.apache.cayenne.util.RelationshipFault.resolveFromDB(RelationshipFault.java:89)
at
org.apache.cayenne.util.PersistentObjectList.resolvedObjectList(PersistentObjectList.java:301)
at
org.apache.cayenne.util.PersistentObjectList.toArray(PersistentObjectList.java:278)
at java.util.ArrayList.(ArrayList.java:131)
at
org.apache.cayenne.ObjectContextDeleteAction.toCollection(ObjectContextDeleteAction.java:124)
at
org.apache.cayenne.ObjectContextDeleteAction.processDeleteRules(ObjectContextDeleteAction.java:153)
at
org.apache.cayenne.ObjectContextDeleteAction.deletePersistent(ObjectContextDeleteAction.java:112)
at
org.apache.cayenne.ObjectContextDeleteAction.performDelete(ObjectContextDeleteAction.java:91)
at org.apache.cayenne.BaseContext.deleteObjects(BaseContext.java:698)
at
com.proton.cayenne.utils.CayenneTemplate.deleteObject(CayenneTemplate.java:79)
at
com.proton.ks.services.business.HostingService.rejectUserRequestToDomain(SourceFile:413)
... 120 more
Caused by: java.lang.InstantiationException
at
sun.reflect.InstantiationExceptionConstructorAccessorImpl.newInstance(InstantiationExceptionConstructorAccessorImpl.java:30)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at java.lang.Class.newInstance0(Class.java:355)
at java.lang.Class.newInstance(Class.java:308)
at
org.apache.cayenne.reflect.PersistentDescriptor.createObject(PersistentDescriptor.java:285)
... 150 more
In case it is not clear in the trace I am only doing a
context.deleteObjects(user) that user is cascading throught the model
and in some way hitting a SessionLogApi or SessionLogWeb which Cayenne
treats as a standard SessionLog and fails.
I hope Andrus can help with this, at least with a way to circunvent the
error as the fix, if feasible, will take some time to arrive a Cayenne
release version.
As always just ask for model, tests, or whatever as I am happy to
provide them.
Thank you in advance and merry christmas
