[jboss-jira] [JBoss JIRA] (AS7-4772) Maintain iteration order for entity bean finders

Fri May 11 03:26:20 EDT 2012

    [ https://issues.jboss.org/browse/AS7-4772?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12692060#comment-12692060 ] 

jaikiran pai commented on AS7-4772:
-----------------------------------

I can certainly see the necessity of maintaining the order of the returned Collection/Enumeration from the finderXXX methods, since they are backed by application specific EJB QL queries. IMO, we can do this change, but I'll do a quick check with Alexey (who's worked in EJB2.x more than I have) to see if he's sees any potential problems.

{quote}
I would be happy to provide a test case and a pull request with this change.
{quote}
Sure. You can start with the changes and the testcase while I check with Alexey. If you need any help, feel free to ask here or in the forums or #jboss-as7 IRC on irc.freenode.net. Here's an article on getting started http://community.jboss.org/wiki/HackingonAS7

> Maintain iteration order for entity bean finders
> ------------------------------------------------
>
>                 Key: AS7-4772
>                 URL: https://issues.jboss.org/browse/AS7-4772
>             Project: Application Server 7
>          Issue Type: Feature Request
>          Components: EJB
>    Affects Versions: 7.1.1.Final
>            Reporter: Mattias Nilsson
>            Assignee: jaikiran pai
>              Labels: ejb2, find, interceptor, iterators, sorting
>
> In previous JBoss AS versions (at least in JBoss AS 4.x) if a finder method in an EJB 2.x entity bean returned a collection or enumeration of primary keys in a specific order, the client would receive a collection or enumeration of entities with the same iteration order.
> In JBoss AS 7, the entity bean home interceptor uses a HashSet when producing the collection of entities. This means iteration order is lost and clients receive the entities in random order.
> As a convenience and as a backward compatibility for users migrating from previous JBoss versions, could you consider replacing java.util.HashSet with java.util.LinkedHashSet in org.jboss.as.ejb3.component.entity.interceptors.EntityBeanHomeFinderInterceptorFactory? I would be happy to provide a test case and a pull request with this change.
> Regards,
> Mattias

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