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From "Teresa Kan (JIRA)" <j...@apache.org>
Subject [jira] Updated: (OPENJPA-261) UnsupportedOperationException occurred in BrokerImpl.java
Date Thu, 21 Jun 2007 15:40:26 GMT

     [ https://issues.apache.org/jira/browse/OPENJPA-261?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Teresa Kan updated OPENJPA-261:
-------------------------------

    Attachment: JIAR261_test.zip

> UnsupportedOperationException occurred in BrokerImpl.java
> ---------------------------------------------------------
>
>                 Key: OPENJPA-261
>                 URL: https://issues.apache.org/jira/browse/OPENJPA-261
>             Project: OpenJPA
>          Issue Type: Bug
>          Components: kernel
>    Affects Versions: 0.9.7
>         Environment: Window XP
>            Reporter: Teresa Kan
>            Priority: Critical
>         Attachments: JIAR261_test.zip, NPE.patch, OPENJPA-261-Java5.jar, OPENJPA-261.patch
>
>
> While I was testing against the openjpa code, I got an UnsupportedOperationException
in the BrokerImpl.endtransaction() method. The method set the transState to an empty Collection
if there is no cache for transactions. Later the code got an UnsupportedOperationException.
> Original code:
> Collection transStates = _transCache;
>         if (transStates == null)
>             transStates = Collections.EMPTY_LIST;
> .....
> for (Iterator itr = transStates.iterator(); itr.hasNext();) {
>             sm = (StateManagerImpl) itr.next();
>             try {
>                 if (rollback) {
>                     // tell objects that may have been derefed then flushed
>                     // (and therefore deleted) to un-deref
>                     sm.setDereferencedDependent(false, false);
>                     sm.rollback();
>                 } else
>                     sm.commit();
>             } catch (RuntimeException re) {
>                 exceps = add(exceps, re);
>             }
>          }
> I put a check before this "for" loop then the UnsupportedOperationException
> disappeared.
> if (!transStates.isEmpty()) {   
>         	for (Iterator itr = transStates.iterator(); itr.hasNext();) {
>             sm = (StateManagerImpl) itr.next();
>             try {
>                 if (rollback) {
>                     // tell objects that may have been derefed then flushed
>                     // (and therefore deleted) to un-deref
>                     sm.setDereferencedDependent(false, false);
>                     sm.rollback();
>                 } else
>                     sm.commit();
>             } catch (RuntimeException re) {
>                 exceps = add(exceps, re);
>             }
>          }
>         }
> The NPE.patch is attached to this JIRA. 

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