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https://issues.apache.org/jira/browse/SLING-2662?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15393690#comment-15393690
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Bertrand Delacretaz commented on SLING-2662:
--------------------------------------------
I have (finally) documented this at
http://sling.staging.apache.org/documentation/bundles/sling-settings-org-apache-sling-settings.html
, reviews and patches are welcome.
> Enhance run mode handling
> -------------------------
>
> Key: SLING-2662
> URL: https://issues.apache.org/jira/browse/SLING-2662
> Project: Sling
> Issue Type: Improvement
> Components: Extensions
> Affects Versions: Settings 1.1.0
> Reporter: Carsten Ziegeler
> Assignee: Carsten Ziegeler
> Fix For: Settings 1.2.0
>
>
> Often there is a need to provide different features where the user might have
> the ability to choose whether a feature should be installed or not.
> This can easily be done with a run mode, so a feature is put into a run mode,
> and if the run mode is activated by the user, the feature is installed.
> However, there are cases where two features might be concurrent, so either
> feature A or feature B should be installed. Still run modes can be used by
> defining two run modes A and B - but in this case if the user does not choose
> one of the run modes, nothing is installed - or if the user selects both run
> modes, both are installed.
> We could support such use cases with some configuration properties for the
> settings service:
> a) we define a property which contains run modes that are usually always
> active
> b) in addition, we define a property which contains whether a run mode is
> active unless another run mode is active.
> So for the above use case, we define run mode A as always active and also set
> the second property to define that A is not active once B is activated by the
> user
> We could also define a third property which contains a set of run modes that
> are only choosable on the first startup of the installation, so in the in the
> example above, if this property is defined for A and B, the user selection of
> the first startup is preserved
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