[jira] [Created] (DELTASPIKE-1441) ConfigProperty support for maps

["Andrew Marinchuk (Jira)" <ji...@apache.org>]

Andrew Marinchuk created DELTASPIKE-1441:
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             Summary: ConfigProperty support for maps
                 Key: DELTASPIKE-1441
                 URL: https://issues.apache.org/jira/browse/DELTASPIKE-1441
             Project: DeltaSpike
          Issue Type: Wish
      Security Level: public (Regular issues)
            Reporter: Andrew Marinchuk


Let's assume that we have the following configuration:{code}my.param.a=1
my.param.b=2
my.param.c=3
...{code}
And we want to load all the {{my.param.*}} parameters into the {{Map<String, Integer>}}.
With the current configuration api there two ways to load such config:
# add parameter {{my.param.all=a,b,c,...}} with complete list of {{my.param.*}} parameters, add an {{@Inject}}'ed {{List<String>}} field with {{@ConfigProperty}} annotation to read this parameter and then fill the map values by reading value by each of the provided keys.
# iterate through ConfigResolver.getAllProperties() by code like [filterPropsByPrefix function|https://issues.apache.org/jira/browse/DELTASPIKE-1212?focusedCommentId=16986128&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#comment-16986128] and fill the Map with it

But I think that loading such config shouldn't be a user problem, library should be capable of loading it. Of course, user can introduce the {{@ApplicationScoped}} bean which will inherits the {{org.apache.deltaspike.core.spi.config.BaseConfigPropertyProducer}} and introduce the {{@Producer}} methods for {{Map<String, ?>}} analog for producers introduced in  org.apache.deltaspike.core.impl.config.DefaultConfigPropertyProducer. But it should be a library code.

Another use case which should be covered is loading Map<String, Intf> where Intf - interface with {{@Configuration}} annotation, i.e.:

{code}datasources.one.url=jdbc://...
datasources.one.user=myuser
datasources.one.password=pass
datasources.two.url=jdbc://....
datasources.two.user=myuser2
datasources.two.password=pass2
...{code}
Currently we use code from [this comment|https://issues.apache.org/jira/browse/DELTASPIKE-1212?focusedCommentId=16986128&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#comment-16986128] to load such configuration, but it could be much simpler if deltaspike had ConfigProperty support for maps with ability to use @Configuration interfaces as values.



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