[jboss-jira] [JBoss JIRA] (AS7-5182) properly transform/resolve expression values

[Brian Stansberry (JIRA)]

    [ https://issues.jboss.org/browse/AS7-5182?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12740978#comment-12740978 ] 

Brian Stansberry commented on AS7-5182:
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If a user says ${exp:default} it's an indication that they expect full expression resolution. Not doing that and just using the default is a violation of that contract.

I don't see how this can be done. At best we could have the master send a request to the slave asking it to resolve the expression against the HC process' system props/env props/vault. But, the system props and env props can vary between servers that slave HC manages. And the master can only send a single value; making it be something that varies by server means... sending an expression. Which isn't supported by those processes.

I believe this should be resolved as Won't Fix. If people want to use new features, they need to upgrade to versions that support those features.
                
> properly transform/resolve expression values
> --------------------------------------------
>
>                 Key: AS7-5182
>                 URL: https://issues.jboss.org/browse/AS7-5182
>             Project: Application Server 7
>          Issue Type: Sub-task
>          Components: Domain Management
>            Reporter: Emanuel Muckenhuber
>            Priority: Optional
>             Fix For: 7.3.0.Alpha1
>
>
> We need to be able to properly handle values which are getting changed to allow expressions. 
> The problem is that older HCs won't understand the expression value, therefore they need be resolved before sending the initial model. At this point this can only be done against domain/host specific system properties. Server-group and server level overrides would be lost when starting a managed server.

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