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From "angela (JIRA)" <j...@apache.org>
Subject [jira] Created: (JCR-2703) UserManagement: Add Membership Cache
Date Tue, 10 Aug 2010 13:13:17 GMT
UserManagement: Add Membership Cache

                 Key: JCR-2703
                 URL: https://issues.apache.org/jira/browse/JCR-2703
             Project: Jackrabbit Content Repository
          Issue Type: Improvement
          Components: jackrabbit-core, security
    Affects Versions: 2.1.0, 2.0.0
            Reporter: angela
            Assignee: angela
             Fix For: 2.2.0

due to weakreference nature of the group members, retrieving the groups a given authorizable
is member is expensive as the corresponding
API call (Node#getWeakReferences) executes a query [fallback if search is disabled: traversing
the complete group tree, which isn't for free either].

i would therefore suggest to add a cache (authorizable nodeId -> group nodeids) that is
gets cleared upon any modification to group membership or
group removal and doesn't need any extra observation. this cache may potentially obsolete
the principal-based cache in DefaultPrincipalProvider... 

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