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From "Michael Dick (JIRA)" <>
Subject [jira] Commented: (OPENJPA-1722) Problem serializing DistinctResultList when EntityManager is closed
Date Thu, 15 Jul 2010 20:52:49 GMT


Michael Dick commented on OPENJPA-1722:

Thanks, take a look at org.apache.openjpa.lib.test.AbstractTestCase.roundtrip(Object, boolean)
- to serialize the resultList. 

>From your description it should just be a matter of closing the EM and then serializing
and verifying that the resultlist is accurate. 

> Problem serializing DistinctResultList when EntityManager is closed
> -------------------------------------------------------------------
>                 Key: OPENJPA-1722
>                 URL:
>             Project: OpenJPA
>          Issue Type: Bug
>          Components: kernel
>    Affects Versions: 2.1.0
>            Reporter: Dianne Richards
>            Assignee: Dianne Richards
>             Fix For: 2.1.0
> A client application that worked earlier is now failing in 2.10, relating to the serialization
of the DistinctResultList. It does a distinct query followed by a getResultList(). A DistinctResultList
is returned from the query, where a DelegatingResultList used to be returned. The EntityManager
is closed before the serialization occurs. It fails with the exception: org.apache.openjpa.persistence.InvalidStateException:
The context has been closed.
> Here's what is happening: The DistinctResultList contains a RuntimeExceptionTranslator
object which contains the closed EntityManager. The writeObject() in the enclosed BrokerImpl
does an assertOpen(), which issues the exception.
> The DelegatingResultList also contains the RuntimeExceptionTranslator. But, it contains
a writeResult() method which is called during serialization. This only attempts to write the
ResultList object, not the RuntimeExceptionTranslator object.
> So, I will add the writeResult() method to the DistinctResultList class. In this case,
it will write an ArrayList instead of a ResultList object. This should be ok since the method
signature is for a List.

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