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From "Julian Reschke (JIRA)" <j...@apache.org>
Subject [jira] Commented: (JCR-616) Completeness/Freshness of Namespace Registry
Date Tue, 14 Nov 2006 14:32:41 GMT
    [ http://issues.apache.org/jira/browse/JCR-616?page=comments#action_12449676 ] 
            
Julian Reschke commented on JCR-616:
------------------------------------

OK.

I have a prototype running which at least fixes the problem for me.

Changes: 

1) NamespaceStorage: add method "getRegisteredNamespaces()",

2) add that to WorkspaceManager,

3) use it in NamespaceRegistryImpl to get a new map when the local one is incomplete.

(What's currently missing in NamespaceRegistryImpl is a way to add the newly retrieved mapping
to the local map, so the refresh logic only needs to be applied once per new entry).

If people think I'm on the right track with this, I will complete the fix and submit a patch.

The optimizations we discussed can then be discussed separately.



> Completeness/Freshness of Namespace Registry
> --------------------------------------------
>
>                 Key: JCR-616
>                 URL: http://issues.apache.org/jira/browse/JCR-616
>             Project: Jackrabbit
>          Issue Type: Bug
>          Components: SPI
>            Reporter: Julian Reschke
>
> We need to define the requirements on completeness and freshness of RepositoryService.getRegisteredNamespaces().
> Right now the optimistic assumption seems to be that an SPI provider is able to report
all namespaces that can occur in a repository beforehand. Even if it can do that (and I know
of potential targets for SPI that simply can't), this seems to be quite a waste of time if
these namespace prefixes aren't actually used later on.
> Furthermore, in SPI namespace prefixes aren't really relevant, except to enable the transient
layer to return "meaningful" prefixes instead of automatically generated ones.
> Therefore my propoal would be to:
> 1) Clarify that the Map returned from getRegisteredNamespaces() isn't required to be
complete,
> 2) Enhance JCR2SPI to auto-generate prefixes when it encounters namespaces not in the
registry.
> I expect this to also affect RepositoryService.(un)registerNamespace(...), but let's
discuss the underlying issue first...

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