jackrabbit-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Thomas Mueller (JIRA)" <j...@apache.org>
Subject [jira] Commented: (JCR-2640) Internal repository context
Date Thu, 27 May 2010 14:14:28 GMT

    [ https://issues.apache.org/jira/browse/JCR-2640?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12872226#action_12872226
] 

Thomas Mueller commented on JCR-2640:
-------------------------------------

> But modularization is about separation of concerns

Sure. I'm just against "we should modularize because modularizing is always good". I'm also
against "we should modularize because it *might* be good in the future". We should only do
that where it actually makes sense, and where it makes sense *now*. Predicting the future
is a bad idea. Known use cases are a different topic of course (large number of child nodes,
large transaction,..).

About public methods: having *every* method public is not a good idea of course, and having
a public method "loginAdministrative" is bad as well. But adding an indirection class just
to avoid public methods doesn't sound like something I would want in Jackrabbit 3.

> Internal repository context
> ---------------------------
>
>                 Key: JCR-2640
>                 URL: https://issues.apache.org/jira/browse/JCR-2640
>             Project: Jackrabbit Content Repository
>          Issue Type: Improvement
>          Components: jackrabbit-core
>            Reporter: Jukka Zitting
>            Assignee: Jukka Zitting
>         Attachments: repository-context-v1.patch, repository-context.png
>
>
> As discussed in JCR-890, the current approach of using protected or package-private getters
on key classes like RepositoryImpl to access other internal components and resources is a
bit troublesome. The attached patch (repository-context-v1.patch) introduces a RepositoryContext
object that can be used to get rid of such getters. This first version replaces the getNamespaceRegistry(),
getNodeTypeRegistry(), getVersionManager() and getRootNodeId() methods from RepositoryImpl.
> The idea behind this component context idea is to separate the JCR API implementation
classes from the task of keeping track of the internal implementation components. This way
none of the instances returned by JCR API methods would have methods through which Jackrabbit
internals can be directly accessed. See the attached UML diagram for how this layered access
would work.
> Assuming people think this is a good idea, I'd like to extend this mechanism to cover
also the rest of the internal Repository components like the data store and the security managers,
etc. I'm also thinking about using a similar context objects for tracking internal components
associated with workspaces (WorkspaceInfo, SharedItemStateManager, etc.) and sessions (LocalItemStateManager,
etc.).
> PS. Yes, we'd get much of the same functionality (and more) from OSGi or an IoC container.
For now I'm hoping to keep things simple without extra external dependencies.

-- 
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.


Mime
View raw message