[jboss-jira] [JBoss JIRA] (WFCORE-291) Handle mixed-domain transformation use cases involving splitting out new subsystems

[Brian Stansberry (JIRA)]

     [ https://issues.jboss.org/browse/WFCORE-291?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Brian Stansberry moved WFLY-3563 to WFCORE-291:
-----------------------------------------------

          Project: WildFly Core  (was: WildFly)
              Key: WFCORE-291  (was: WFLY-3563)
      Component/s: Domain Management
                       (was: Domain Management)
    Fix Version/s:     (was: 9.0.0.Beta1)


> Handle mixed-domain transformation use cases involving splitting out new subsystems
> -----------------------------------------------------------------------------------
>
>                 Key: WFCORE-291
>                 URL: https://issues.jboss.org/browse/WFCORE-291
>             Project: WildFly Core
>          Issue Type: Enhancement
>          Components: Domain Management
>            Reporter: Brian Stansberry
>
> This may end up needing subtasks.
> We need to be able to handle the mixed-domain transformation issues that arise when a subsystem is split out from a previously existing subsystem.
> 1) The registering slave will have no version info for the new subsystem. The new subsystem needs to be able to register a transformer for the logical equivalent of the 'null' version.
> 2) It needs to be possible to register a discard for the root resource of a subsystem. For example, when jsf was split out, the presence of the subsystem was equivalent to the default behavior of the legacy 'web' subsystem, so jsf could just be discarded.
> 3) It needs to be possible for one subsystem to issue a reject transformation if the another subsystem is not configured. For example, when jsf was split out it would have been valid for a reject transformation to have been applied by web if the jsf subsystem was not present, since the legacy slave will have jsf. (It's ok this reject wasn't done; I'm just using jsf/web as an example.) 



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