[ http://jira.jboss.com/jira/browse/JBAS-1361?page=history ]
Scott M Stark reassigned JBAS-1361:
-----------------------------------
Assign To: Alexey Loubyansky (was: Scott M Stark)
> Incorrect relations management
> ------------------------------
>
> Key: JBAS-1361
> URL: http://jira.jboss.com/jira/browse/JBAS-1361
> Project: JBoss Application Server
> Type: Bug
> Components: CMP service
> Versions: JBossAS-3.2.6 Final
> Environment: Jboss 3.2.6, Windows XP SP2, JVM 1.4.2_06, Oracle 9i
> Reporter: Doychin Bondzhev
> Assignee: Alexey Loubyansky
>
>
> I discovered strange change in the behaiviour of relation collections after
> jboss 3.2.3
> Here is what I have as starting point:
> I have 2 entity beans. the first one hase relation to the second one (one to
> many). The primary key for second bean cosits of 2 fields of type Integer and
> Long.
> so I get an instance of the first bean and get a collection of releated
> instances of the second bean.
> Collection c = bean1.getBean2();
> c.clear;
> PriamryKeyCalss pk = new PrimaryKeyClass();
> pk.expiring = new Long(0);
> for (int i = 0; i < newReleationIds.size(); i++) {
> pk.id = (Integer)newReleationIds(i);
> Bean2 bean2 = Bean2Home.findByPrimaryKey(pk);
> c.add(bean2);
> }
> What I found is actually that wehn the bean2 instance is loaded from DB and
> not from the read-ahead cache everything is fine.
> In case bean2 instance is loaded from read-ahead-cache the primary key object
> is reused and stored directly into new instance instead of creating new
> instance of the primary key object.
> So when I change the value of the ID field find new instance in c.add there
> is a chekc which checks is this PK is already added in the collection.
> Becouse of the object reuse it finds this PK object and returns. In jboss
> 3.2.3 this was not the case.
> A posible fix from my code that I found is to create new instance of the
> primary key class for each call of the finder method.
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