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From "Karim de Fombelle (JIRA)" <>
Subject [jira] [Closed] (DELTASPIKE-311) @ConfigProperty injects property from a specific ConfigSource
Date Mon, 21 Jan 2013 23:24:13 GMT


Karim de Fombelle closed DELTASPIKE-311.

    Resolution: Won't Fix
> @ConfigProperty injects property from a specific ConfigSource
> -------------------------------------------------------------
>                 Key: DELTASPIKE-311
>                 URL:
>             Project: DeltaSpike
>          Issue Type: Improvement
>          Components: Configuration
>    Affects Versions: 0.6-incubating
>            Reporter: Karim de Fombelle
> In deltapsike CDI configuration extension it is possible to add our own ConfigSourceProvider
via the service loader mechanism.
> Then when a property is searched from the @ConfigProperty annotation, the extension scans
all ConfigSource loaded (according priorities defined as ConfigSource.ordinal attribute).
> This mechanism works fine.
> However it could be improved allowing users to target a specific ConfigSource for the
searched property.
> @Inject
> @ConfigProperty(configSourceId="classpath" name = "property1")
> private String property1;
> Or an URI scheme could be used as follows:
> @Inject
> @ConfigProperty(name = "configSourceUriScheme://property1") //classpath://property1 for
> private String property1;
> Benefits would be to:
> -enhance a lot readability / maintainability of the code
> -enhance flexibility: allow a user to use a property name even it is already used elsewhere.
(i.e. from a different ConfigSource)
> -get rid of some tricky overriding if a property is accessible via several ConfigSource
> e.g.: a framework should ensure no application deployed within will add ConfigSourceProvider/ConfigSource
with a higher priority and the same property. One way to enforce this would be to implement
another CDI extension checking the ConfigSource priorities. 
> It really sounds over complex and highlights the enhancement would be valuable.
> For reference Spring proposes a mechanism not so far of the above and allowing enrichment
by inheritance:

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