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https://issues.apache.org/jira/browse/OAK-3146?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14642938#comment-14642938
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Tobias Bocanegra commented on OAK-3146:
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+1 LGTM  (I didn't test it - just reviewed)

> ExternalLoginModuleFactory should inject SyncManager and 
> ExternalIdentityProviderManager
> ----------------------------------------------------------------------------------------
>
>                 Key: OAK-3146
>                 URL: https://issues.apache.org/jira/browse/OAK-3146
>             Project: Jackrabbit Oak
>          Issue Type: Improvement
>          Components: security
>            Reporter: Chetan Mehrotra
>            Priority: Minor
>             Fix For: 1.2.4, 1.3.4, 1.0.18
>
>         Attachments: OAK-3146.patch
>
>
> {{ExternalLoginModule}} currently performs a lookup of {{SyncManager}} and 
> {{ExternalIdentityProviderManager}} in initialize call which performs service 
> lookup using ServiceTracker. Doing a service lookup in critical path would 
> have adverse performance impact. 
> Instead of performing the lookup {{ExternalLoginModuleFactory}} should track 
> the two manager instances and pass them to {{ExternalLoginModule}}. This 
> would ensure that expensive operation like service lookup is not performed in 
> critical path



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