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From "Patrick Linskey" <plins...@bea.com>
Subject RE: OpenJPA & Transaction configuration
Date Thu, 01 Mar 2007 05:37:48 GMT
Can you post the source for ProcessDAOImpl? Also, are there any other
OpenJPA properties in your configuration? Finally, I'm assuming that
you're using a somewhat-current 0.9.7-SNAPSHOT. Correct me if I'm wrong.

> But shouldn't I worry about the fact that a brand new 
> instance is detached? I could be wrong but it looks 
> like it's more a symptom of

I believe that you should. I think I remember reading something about
this recently, but I don't remember the details. My suspicion is that
you don't have an @Version field, and you're using the default detach
manager. IIRC, this combination leaves OpenJPA with no way to detect a
detached object vs. a new object, and we default to detached. I thought
that we had improved the docs around this at the least; certainly, it'd
be good to figure out your particulars and make sure that this is
clearer for others.

(IIRC, the default detach manager uses a heuristic on the value in the
version field to determine whether an instance is new or detached.
OpenJPA supports more flexible detach managers that can do fun things
like providing useful errors when attempting to navigate past the end of
a detached object graph, and fine-grained tracking of changes made while
detached. But it's not serialization-compatible with the unenhanced
code, meaning that you need to put the enhanced classes into your client
tier, which I think that we decided was a bad default.)

-Patrick

-- 
Patrick Linskey
BEA Systems, Inc. 

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> -----Original Message-----
> From: Matthieu Riou [mailto:matthieu.riou@gmail.com] 
> Sent: Wednesday, February 28, 2007 7:50 PM
> To: Pinaki Poddar
> Cc: open-jpa-dev@incubator.apache.org
> Subject: Re: OpenJPA & Transaction configuration
> 
> Thanks! But shouldn't I worry about the fact that a brand new 
> instance is
> detached? I could be wrong but it looks like it's more a symptom of
> something wrong in my configuration, no?
> 
> On 2/28/07, Pinaki Poddar <ppoddar@bea.com> wrote:
> >
> >   instead of _em.persist(ret);
> > try
> >   _em.merge(ret);
> >
> > as ret is detached instance rather than new.
> >
> >
> >
> > Pinaki Poddar
> > BEA Systems
> > 415.402.7317
> >
> >
> > -----Original Message-----
> > From: Matthieu Riou [mailto:matthieu.riou@gmail.com]
> > Sent: Wednesday, February 28, 2007 6:29 PM
> > To: open-jpa-dev@incubator.apache.org
> > Subject: OpenJPA & Transaction configuration
> >
> > Hi,
> >
> > I'm going back at the OpenJPA implementation for the Apache 
> ODE project
> > and am still having problems with the setup. Whan I try to 
> persist a new
> > object I get an exception "Attempt to persist detached 
> object". I guess
> > the when I instantiate my object OpenJPA can't locate its 
> transactional
> > context or something related therefore assuming that the object is
> > instantiated outside of any persistent context.
> >
> > Here is the code that creates the EntityManagerFactory:
> >
> >         HashMap<String, Object> propMap = new 
> HashMap<String,Object>();
> >         propMap.put("openjpa.Log", "DefaultLevel=TRACE");
> >         propMap.put("openjpa.jdbc.DBDictionary", "
> > org.apache.openjpa.jdbc.sql.DerbyDictionary");
> >         propMap.put("openjpa.ManagedRuntime", new TxMgrProvider());
> >         propMap.put("openjpa.ConnectionFactory", _ds);
> >         propMap.put("openjpa.ConnectionFactoryMode", "managed");
> >         propMap.put("openjpa.Log", "DefaultLevel=TRACE");
> >         _emf = Persistence.createEntityManagerFactory("ode-dao",
> > propMap);
> >
> > And here is my object instantiation code:
> >
> >         ProcessDAOImpl ret = new
> > ProcessDAOImpl(pid,type,guid,this,version);
> >         System.out.println("detached " +
> > ((PersistenceCapable)ret).pcIsDetached());
> >         _em.persist(ret);
> >
> > My little debugging statement outputs "true". I've 
> reproduced the full
> > log below. I've also encapsulated to transaction manager and the
> > transaction to check whether OpenJPA was getting the transaction and
> > registering a synchronizer properly. It seems to be doing 
> so (the log
> > statements are just a couple lines above the '.....'). I've 
> removed all
> > the mapping logs just to avoid making this too lengthy.
> >
> > Any idea of what the problem could be? I'm kind of stuck on 
> this as it's
> > hard to debug the enhanced code that gets called when I 
> instantiate my
> > process object.
> >
> > DEBUG - ODEMessageReceiver.receive(47) | Received message for
> > helloWorld.hello DEBUG - 
> ODEService.onAxisMessageExchange(96) | Starting
> > transaction.
> > DEBUG - BpelEngineImpl.route(237) | Routed: svcQname {
> > http://ode/bpel/unit-test.wsdl}HelloService --> BpelProcess[{
> > http://ode/bpel/unit-test}HelloWorld2-1]
> > 29603  ode-dao  INFO   [http-8080-Processor25] openjpa.Runtime -
> > Starting
> > OpenJPA 0.9.7-incubating-SNAPSHOT
> > 29604  ode-dao  TRACE  [http-8080-Processor25] openjpa.Runtime -
> > Properties:
> > openjpa.EntityManagerFactory: default
> > openjpa.DataCache: false
> > openjpa.MetaDataFactory: jpa(Types=
> > org.apache.ode.dao.jpa.ActivityRecoveryDAOImpl
> > 
> ;org.apache.ode.dao.jpa.CorrelationSetDAOImpl;org.apache.ode.d
> ao.jpa.Cor
> > 
> relatorDAOImpl;org.apache.ode.dao.jpa.EventDAOImpl;org.apache.
> ode.dao.jp
> > 
> a.FaultDAOImpl;org.apache.ode.dao.jpa.MessageDAOImpl;org.apach
> e.ode.dao.
> > 
> jpa.MessageExchangeDAOImpl;org.apache.ode.dao.jpa.MessageRoute
> DAOImpl;or
> > 
> g.apache.ode.dao.jpa.PartnerLinkDAOImpl;org.apache.ode.dao.jpa
> .ProcessDA
> > 
> OImpl;org.apache.ode.dao.jpa.ProcessInstanceDAOImpl;org.apache
> .ode.dao.j
> > pa.ScopeDAOImpl;org.apache.ode.dao.jpa.XmlDataDAOImpl)
> > openjpa.InverseManager: false
> > openjpa.ReadLockLevel: read
> > openjpa.DataCacheManager: default
> > openjpa.jdbc.SubclassFetchMode: join
> > openjpa.jdbc.UpdateManager: default
> > openjpa.jdbc.SynchronizeMappings: false
> > openjpa.NontransactionalRead: true
> > openjpa.QueryCompilationCache: true
> > openjpa.MaxFetchDepth: -1
> > openjpa.RetainState: true
> > openjpa.DynamicDataStructs: false
> > openjpa.BrokerFactory: jdbc
> > openjpa.WriteLockLevel: write
> > openjpa.ManagedRuntime:
> > org.apache.ode.dao.jpa.BPELDAOConnectionFactoryImpl$TxMgrProvider
> > openjpa.jdbc.EagerFetchMode: parallel
> > openjpa.RestoreState: immutable
> > openjpa.jdbc.SchemaFactory: dynamic
> > openjpa.LockManager: version
> > openjpa.BrokerImpl: default
> > openjpa.NontransactionalWrite: true
> > openjpa.MetaDataRepository: default
> > openjpa.Log: true(DefaultLevel=TRACE)
> > openjpa.jdbc.ResultSetType: forward-only
> > openjpa.AutoDetach:
> > openjpa.ConnectionRetainMode: on-demand
> > openjpa.SavepointManager: in-mem
> > openjpa.jdbc.DBDictionary: derby
> > openjpa.Optimistic: true
> > openjpa.ConnectionFactoryMode: managed
> > openjpa.Sequence: table
> > openjpa.FetchGroups: default
> > openjpa.jdbc.Schemas:
> > openjpa.Id: ode-dao
> > openjpa.OrphanedKeyAction: log
> > openjpa.FlushBeforeQueries: true
> > openjpa.AutoClear: datastore
> > openjpa.Compatibility: default
> > openjpa.DetachState: loaded
> > openjpa.jdbc.LRSSize: query
> > openjpa.Multithreaded: false
> > openjpa.FetchBatchSize: -1
> > openjpa.jdbc.SQLFactory: default
> > openjpa.IgnoreChanges: false
> > openjpa.jdbc.MappingDefaults: jpa
> > openjpa.TransactionMode: local
> > openjpa.RetryClassRegistration: false
> > openjpa.jdbc.FetchDirection: forward
> > openjpa.ClassResolver: default
> > openjpa.LockTimeout: -1
> > openjpa.DataCacheTimeout: -1
> > openjpa.QueryCache: true
> > openjpa.jdbc.DriverDataSource: simple
> > openjpa.jdbc.TransactionIsolation: default
> > openjpa.ProxyManager: default
> > 29604  ode-dao  TRACE  [http-8080-Processor25] 
> openjpa.MetaData - Using
> > metadata factory "
> > 
> org.apache.openjpa.persistence.jdbc.PersistenceMappingFactory@
> 1742ad8".
> > 29604  ode-dao  INFO   [http-8080-Processor25] 
> openjpa.jdbc.JDBC - Using
> > dictionary class "org.apache.openjpa.jdbc.sql.DerbyDictionary".
> > WARN - 
> BPELDAOConnectionFactoryImpl$DebugTxMgr.getTransaction(130) | JPA
> > get transaction WARN -
> > BPELDAOConnectionFactoryImpl$DebugTx.registerSynchronization(179) |
> > Synchronization registration on org.apache.openjpa.kernel.BrokerImpl
> > WARN - 
> BPELDAOConnectionFactoryImpl$DebugTx.registerSynchronization(179)
> > | Synchronization registration on
> > 
> org.apache.openjpa.kernel.AbstractBrokerFactory$RemoveTransactionSync
> > 29610  ode-dao  INFO   [http-8080-Processor25] 
> openjpa.MetaData - Found
> > 13
> > classes with metadata in 0 milliseconds.
> > 29834  ode-dao  TRACE  [http-8080-Processor25] openjpa.MetaData -
> > Loading metadata for "class
> > org.apache.ode.dao.jpa.MessageExchangeDAOImpl" under mode
> > "[META][QUERY]".
> > ..........
> > ..........
> > 30386  ode-dao  TRACE  [http-8080-Processor25] openjpa.jdbc.SQL - <t
> > 9601173, conn 16542562> executing prepstmnt 6493766 SELECT t0.ID,
> > t0.VERSION, t0.GUID, t0.NUMBER_OF_INSTANCES, t0.PROCESS_ID,
> > t0.PROCESS_TYPE FROM ODE_PROCESS t0 WHERE (t0.PROCESS_ID = ?)
> > [params=(String) { http://ode/bpel/unit-test}HelloWorld2-1]
> > 30387  ode-dao  TRACE  [http-8080-Processor25] openjpa.jdbc.SQL - <t
> > 9601173, conn 16542562> [0 ms] spent
> > 30388  ode-dao  TRACE  [http-8080-Processor25] 
> openjpa.jdbc.JDBC - <t
> > 9601173, conn 16542562> [0 ms] close detached true WARN -
> > BPELDAOConnectionFactoryImpl$DebugTxMgr.getTransaction(130) 
> | JPA get
> > transaction ERROR - BpelServerImpl.bounceProcessDAO(334) | DbError
> > <2|false|0.9.7-incubating-SNAPSHOT>
> > org.apache.openjpa.persistence.EntityExistsException: 
> Attempt to persist
> > detached object "org.apache.ode.dao.jpa.ProcessDAOImpl@c195e3".
> > FailedObject: org.apache.ode.dao.jpa.ProcessDAOImpl@c195e3
> >     at
> > org.apache.openjpa.kernel.BrokerImpl.persist(BrokerImpl.java:2346)
> >     at
> > org.apache.openjpa.kernel.BrokerImpl.persist(BrokerImpl.java:2204)
> >     at org.apache.openjpa.kernel.DelegatingBroker.persist(
> > DelegatingBroker.java:991)
> >     at org.apache.openjpa.persistence.EntityManagerImpl.persist(
> > EntityManagerImpl.java:525)
> >     at org.apache.ode.dao.jpa.BPELDAOConnectionImpl.createProcess(
> > BPELDAOConnectionImpl.java:78)
> >
> > Thanks!
> > Matthieu
> > 
> ______________________________________________________________
> _________
> > Notice:  This email message, together with any attachments, 
> may contain
> > information  of  BEA Systems,  Inc.,  its subsidiaries  and 
>  affiliated
> > entities,  that may be confidential,  proprietary,  
> copyrighted  and/or
> > legally privileged, and is intended solely for the use of 
> the individual
> > or entity named in this message. If you are not the 
> intended recipient,
> > and have received this message in error, please immediately 
> return this
> > by email and then delete it.
> >
> 

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