[jboss-jira] [JBoss JIRA] (AS7-6964) Recursive expression resolution

[Jess Sightler (JIRA)]

    [ https://issues.jboss.org/browse/AS7-6964?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12769285#comment-12769285 ] 

Jess Sightler commented on AS7-6964:
------------------------------------

I have added an initial pass at an implementation (with the above feature missing) in order to solicit some feedback.

Basically, variable resolution happens in two places:
 - The model node itself (System Property and Environment Variable resolution)
 - The ExpressionResolver (vault)

I have worked around this by moving the call to node.resolve() into the resolveExpressionsRecursively itself for the moment. I don't really see a way around this with the current design, but it doesn't seem ideal to me.

Suggestions?
                
> Recursive expression resolution
> -------------------------------
>
>                 Key: AS7-6964
>                 URL: https://issues.jboss.org/browse/AS7-6964
>             Project: Application Server 7
>          Issue Type: Feature Request
>          Components: Domain Management
>            Reporter: Brian Stansberry
>            Assignee: Jess Sightler
>
> When resolving an expression, keep resolving until the output of the resolution matches the input.
> Use case:
> ${sys.prop.with.host.specific.value}
> resolves to
> ${VAULT::xxxxx}
> which resolves to
> thesecret
> Basically, the main mechanism for customizing domain-level configs on a per-host basis is to use expressions and use different values on each host. But this breaks down when a vault expression is added to the mix.

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