[jira] [Created] (KARAF-4496) UserPrincipal lookup in the JAAS' BackingEngine

["Yurii Rashkovskii (JIRA)" <ji...@apache.org>]

Yurii Rashkovskii created KARAF-4496:
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             Summary: UserPrincipal lookup in the JAAS' BackingEngine
                 Key: KARAF-4496
                 URL: https://issues.apache.org/jira/browse/KARAF-4496
             Project: Karaf
          Issue Type: Improvement
            Reporter: Yurii Rashkovskii
            Priority: Minor
             Fix For: 4.1.0


I have a suggestion for improving org.apache.karaf.jaas.modules.BackingEngine

Currently, the only way to lookup an individual user (as far as I can tell) is to iterate through the result of BackingEngine#listUsers() and find the required user. This is fine if the number of users is reasonably low. However, when JAAS infrastructure is used for public systems (say, a SaaS), it quickly becomes a bottleneck.

I suggest adding something like `public UserPrincipal lookupUser(String name)` to avoid this problem (also, it should return `null` if no such user found , or throw an exception)

I am happy to contribute a PR promptly if this change will be approved.

Thoughts?



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