[jira] [Updated] (GORA-12) Semantics of DataStore.delete*

["Chris A. Mattmann (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/GORA-12?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Chris A. Mattmann updated GORA-12:
----------------------------------

    Fix Version/s:     (was: 0.1-incubating)
                   0.2-incubating

> Semantics of DataStore.delete*
> ------------------------------
>
>                 Key: GORA-12
>                 URL: https://issues.apache.org/jira/browse/GORA-12
>             Project: Gora
>          Issue Type: Bug
>          Components: storage
>            Reporter: Andrzej Bialecki 
>            Assignee: Andrzej Bialecki 
>             Fix For: 0.2-incubating
>
>         Attachments: GORA-12.patch
>
>
> Behavior of delete* calls in DataStore is insufficiently defined. Some unit tests in DataStoreUtil seem to indicate that after a successful call to delete the subsequent queries should not return deleted items. Other tests indicate that an additional DataStore.flush() call is needed.
> If we could rely on the latter assumption this would allow for some important optimizations in the implementations of DataStore - bulk updates that are visible only after an update transaction is finished are usually much less expensive to perform than equivalent multiple item by item transactions.
> Therefore I propose to strengthen the meaning of delete* calls, so that their effects are guaranteed to be visible to get/execute ONLY after a subsequent flush() call.

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