[jira] [Commented] (EXTCDI-174) Introduce @PropertyActivated or @ConfigActivated

["Gerhard Petracek (JIRA)" <de...@myfaces.apache.org>]

    [ https://issues.apache.org/jira/browse/EXTCDI-174?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13030753#comment-13030753 ] 

Gerhard Petracek commented on EXTCDI-174:
-----------------------------------------

suggestion:

@ActivatedOn("any expression")

... by default it would be interpreted by ConfiguredValueInterpreter which delegates to the existing ConfiguredValueResolver (which also allows to add custom resolvers to the lookup chain).

as an alternative it would be possible to overrule the default interpreter via:

@ActivatedOn(value = "any expression", interpreter = CustomInterpreter.class)

-> per default it's simple but still very extensible

> Introduce @PropertyActivated or @ConfigActivated
> ------------------------------------------------
>
>                 Key: EXTCDI-174
>                 URL: https://issues.apache.org/jira/browse/EXTCDI-174
>             Project: MyFaces CODI
>          Issue Type: New Feature
>          Components: Core
>            Reporter: Mark Struberg
>            Assignee: Mark Struberg
>
> While at JAX, I got pretty often asked if there is a way to configure <alternatives> automatically via configuration. I pointed them to @ProjectStageActivated and this solved 60% of the problems.
> But there are pretty often more complex scenarios where users like to switch between e.g. database vendors based on an external configuration.
> This could e.g. be a normal java properties file and something like
> {code}
> @PropertyActivated("user.databyse", "mysql")
> {code}
> where the first parameter is the name and the 2nd is the value which must be set.
> Please add further ideas for ways to change those configurations.
> The actual implementation should be trivial as we have most of the work done already in ProjectStageActivationExtension.

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