Carsten Ziegeler created SLING-2662:
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Summary: 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: Extensions Settings 1.1.0
Reporter: Carsten Ziegeler
Assignee: Carsten Ziegeler
Fix For: Extensions Settings 1.1.2
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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