[OJB-developers] Using OJB in JBoss

[Matthew B. <ma...@so...>]

Here are the preliminary instructions on using OJB inside JBoss:

In the jboss.jcml (jboss 2) or jboss-service.xml (jboss 3)

1. Add the following MBean declaration

<mbean code="org.jboss.odmg.ojb.ODMGImpl"
name="DefaultDomain:service=ODMG,name=@bindname@">
    <attribute
name="Configuration">file:PATHTOOJB/OJB.properties</attribute>
    <attribute name="JndiName">@bindname@</attribute>
  </mbean>

2. Make sure your OJB Properties files has the following settings:

PersistenceBrokerFactoryClass=ojb.broker.ta.PersistenceBrokerFactoryJ2EEImpl
ignoreAutoCommitExceptions=true
useAutoCommit=false
PersistenceBrokerClass=ojb.broker.ta.PersistenceBrokerJ2EEImpl

3. inside your EJB's you can get a handle on the ODMG like this:

private Implementation getODMG()
      throws EJBException
   {
      String pmname = "java:/YourBindingName";
      try
      {
         ODMGJ2EEFactory factory = (ODMGJ2EEFactory) new
InitialContext().lookup(pmname);
         return factory.getInstance();
      }
      catch (Throwable re)
      {
         log(re.getMessage());
         re.printStackTrace();
         throw new EJBException("An Exception occured "
                + "when attempting to allocate an ODMG Implementation "
                + "connection: " + re);
      }
   }

You can get the persistenceBroker reference from the current transaction and
it will also operate properly in the managed environment.

NOTES
- Local Transactions only support at this time. XA will come in about 2
weeks
- Sample EJB code will be delivered sooner, probably 1 week.
- JCA for more portability will be delivered in about 2 weeks.
- you never need to use the transactions inside OJB for anything related to
begin/abort/commit. This will all be handled by the app server.

Please let me know if you have any problems.

Cheers,
Matthew