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From "Jukka Zitting (JIRA)" <j...@apache.org>
Subject [jira] Commented: (JCR-1865) Add the Data Store to the Jackrabbit API
Date Wed, 02 Sep 2009 18:28:33 GMT

    [ https://issues.apache.org/jira/browse/JCR-1865?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12750589#action_12750589

Jukka Zitting commented on JCR-1865:

> And how do you do that? For the admin session, getRepository() returns a ManagedRepositoryImpl,
> and for non-admin sessions, it returns RepositoryImpl?

Nope, the ManagedRepository (or perhaps some other name) interface would *not* extend javax.jcr.Repository
and would not be implemented by the Repository instance. Only clients that have explicitly
been given a ManagedRepository reference could access management operation like garbage collection,
shutdown, backup, etc.

Access to the ManagedRepository reference can be controlled by for example selectively making
the JNDI reference available to applications that need such access, or for remote access for
example by using the standard RMI or JMXMP access controls. The way I see it, access to such
management features is more a configuration/deployment question than normal JCR authentication/authorization
issue. Of course that's just one point of view.

> I need it to do display the progress.

The API as proposed only tells what the collector is currently doing not how much work still
remains. Is that enough?

> > Could we achieve the same use case with a simpler API? 
> Not as far as I know.

Does the MarkEventListener interface need to extend EventListener? Why do we need separate
before/after events? Do the event methods need a Node argument, or would a path (or identifier)
string be enough? Is the done() method needed or could the same information be inferred from
the mark( ) method returning?

> The observation listener is an implementation detail of the garbage collector. The user
of the API should have to deal with it.

Sorry, I misunderstood your earlier comment about the listener, I thought you referred tot
he MarkEventListener instance. :-)

I now see your point about the close() method, but couldn't the sweep() method already release
any reserved resources? AFAIK they're not needed after sweep() returns.

> Add the Data Store to the Jackrabbit API
> ----------------------------------------
>                 Key: JCR-1865
>                 URL: https://issues.apache.org/jira/browse/JCR-1865
>             Project: Jackrabbit Content Repository
>          Issue Type: Improvement
>          Components: jackrabbit-core
>            Reporter: Thomas Mueller
>            Assignee: Thomas Mueller
>            Priority: Minor
>         Attachments: api.patch, api_2.patch, core.patch, core_2.patch
> Currently, the garbage collection is not part of the Jackrabbit API. However, the data
store garbage collection must be used once in a while if the data store is enabled. I propose
to add the required interfaces to the Jackrabbit API. This will also allow to call garbage
collection using RMI.

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