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From "Patrick Linskey (JIRA)" <j...@apache.org>
Subject [jira] Commented: (OPENJPA-370) LoadFetchGroup annotation was not recognized during the fetch1
Date Tue, 30 Oct 2007 14:59:50 GMT

    [ https://issues.apache.org/jira/browse/OPENJPA-370?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12538791
] 

Patrick Linskey commented on OPENJPA-370:
-----------------------------------------

Maybe I should be more clear about the impact. Our tests seem to indicate that this causes
performance regressions across the board, not just when the feature is used. That is, the
current implementation appears to slow down all relationship traversals and pk loads that
do not come from cache.

I haven't confirmed that 100%, but that's what the initial runs seem to show.

> LoadFetchGroup annotation was not recognized during the fetch1
> --------------------------------------------------------------
>
>                 Key: OPENJPA-370
>                 URL: https://issues.apache.org/jira/browse/OPENJPA-370
>             Project: OpenJPA
>          Issue Type: Bug
>          Components: kernel
>    Affects Versions: 1.0.1, 1.1.0
>            Reporter: Teresa Kan
>            Assignee: Teresa Kan
>             Fix For: 1.0.1, 1.1.0
>
>         Attachments: OPENJPA_370_2.patch, TestFetchGroup.zip
>
>
> Employee class has a LoadFetchGroup annotation defined on the Rating field, when getRating
was called, the address should be returned also. However, openjpa did not handle the LoadFetchGroup
correctly, therefore, address was not eargly fetched.
> public class FGEmployee{
>     @Id
>     private int id;
>  
>     @OneToOne(fetch=FetchType.LAZY) 
>     private FGAddress address;
>  
>     @Basic(fetch=FetchType.LAZY)
>     @LoadFetchGroup("AddressFetchGroup")
>     private String rating;
>  
>     @ManyToOne(fetch=FetchType.LAZY)
>     private FGManager manager;
> ..
> }

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