[jboss-jira] [JBoss JIRA] Created: (JBRULES-2714) Drools Persistence Should Not Rely on an Existing Named Query in "META-INF/orm.xml"

[Anatoly Polinsky (JIRA)]

Drools Persistence Should Not Rely on an Existing Named Query in "META-INF/orm.xml"
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                 Key: JBRULES-2714
                 URL: https://jira.jboss.org/browse/JBRULES-2714
             Project: Drools
          Issue Type: Bug
      Security Level: Public (Everyone can see)
    Affects Versions: 5.1.1.FINAL
         Environment: N/A
            Reporter: Anatoly Polinsky
            Assignee: Mark Proctor


There is a named query "ProcessInstancesWaitingForEvent" that lives in a drools persistence jar under "META-INF/orm.xml". 

The problem is not even that the query is wrong ( org.hibernate.QueryException: cannot dereference scalar collection element.. ), but that majority of applications that sit on top of JPA rely on its own mappings, and hence this query either:
 
   1. Lost, since the custom "persistence.xml" will redefine the path to other mapping files

   2. Will result in "Duplicate query mapping" exception if defined in a custom mapping file ( http://opensource.atlassian.com/projects/hibernate/browse/HHH-4152 )

Would be more logical not to depend that everyone knows to look inside "drools persistence jar", and to have an extensive documentation explaining "ProcessInstancesWaitingForEvent". It maybe hardcoded through @NamedQuery or just be available as an OPTIONAL file to use by Drools clients: e.g. "<mapping-file>META-INF/persistence/mapping/drools/drools-named-queries.xml</mapping-file>" ( and again: documented.. )

/Anatoly

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