Re: global oid

[battjt]

java.lang.Object doesn't have an ID field.  Are you suggesting that I 
change my datamodel to have a single peristable super class?

Joe

[EMAIL PROTECTED] wrote:

What you need to do, is create a class-descriptor that describes "Object",
and all it's persistent derivative objects.   Then OIDs are unique across
the whole system, and more imporantly when you load an Object.class with
OID 5, it will know it has to look at all the tables to find it.
<removed huge sig>

Then how do I convert '5' into an object?  Don't I still need to use a
org.apache.ojb.broker.Identity? How do I allocate an Identity if I don't
know the class?
Joe

Lance Eason wrote:
 

Just add an attribute "globalSequenceId" with a value of "true" to the
   

entry for the sequence manager in your repository file.
 

      <sequence-manager className
   

="org.apache.ojb.broker.util.sequence.SequenceManagerHighLowImpl">
 

          <attribute attribute-name="grabSize" attribute-value="20"/>
          <attribute attribute-name="globalSequenceId" attribute-value
   

="true"/>
 

      </sequence-manager>

-----Original Message-----
From: battjt [mailto:[EMAIL PROTECTED]
Sent: Wednesday, May 28, 2003 1:06 PM
To: OJB Users List
Subject: global oid
I'm still trying to port our applications from Poet to OJB.

Poet has a concept of an object ID, OID.  I added the id as a field on
each of our objects and map that to the ID column from Poet.  The
problem is that the OID is global.  Given a long, Poet returns an
Object.  'Identity's in OJB are not global, but instead scoped to a
class.  Anyone have a pattern to work around this?
(Possible I'm just completely lost.  I was using Longs for my ids, but
org.apache.ojb.jdori.sql.OjbStoreManager.getPCClassForOid was throwing a
class cast exception, so I assumed that I needed to use
org.apache.ojb.broker.Identity for my ids.)
Thanks again,
Joe