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Date: Fri, 15 Aug 2008 01:41:44 -0700 (PDT)
From: "Andy Jefferson (JIRA)" <jira@apache.org>
To: jdo-dev@db.apache.org
Subject: [jira] Commented: (JDO-597) PMF : Add "readOnly" setting for better
 handling of read-only datastores
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    [ https://issues.apache.org/jira/browse/JDO-597?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12622837#action_12622837 ] 

Andy Jefferson commented on JDO-597:
------------------------------------

The latter two tests seem to have an error. The localSetup creates a "pmf2" that is read only. The first test gets its PM from "pmf2". The latter two tests just call getPM(), hence not using the readonly PMF.

> PMF : Add "readOnly" setting for better handling of read-only datastores
> ------------------------------------------------------------------------
>
>                 Key: JDO-597
>                 URL: https://issues.apache.org/jira/browse/JDO-597
>             Project: JDO
>          Issue Type: New Feature
>          Components: api2, api2-legacy, specification
>            Reporter: Andy Jefferson
>            Assignee: Andy Jefferson
>             Fix For: JDO 2 maintenance release 2
>
>         Attachments: JDOReadOnlyException.patch
>
>
> A user has a datastore that is outside their control and they either don't have permission to write to it, or maybe they have permissions but don't want to write to it. They want a better way of handling this, preventing updates to the datastore.
> Propose :-
> PMF property (with setter/getter)
> javax.jdo.option.ReadOnly - values true | false
> JDOReadOnlyException extends JDOUserException
> Behaviour :-
> When readOnly is set to true :-
> Any operation resulting in a creation/modification of an object to be sent to the datastore should throw a JDOReadOnlyException. This may be at commit(), flush(), or alternatively at makePersistent() when using datastore txns, or query.deletePersistentAll(). That is, no change should be made to the datastore contents at all.

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