[jboss-jira] [JBoss JIRA] (AS7-6306) Validate composite operation steps just before executing them

[Brian Stansberry (JIRA)]

    [ https://issues.jboss.org/browse/AS7-6306?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12757920#comment-12757920 ] 

Brian Stansberry commented on AS7-6306:
---------------------------------------

Yes, we roll back. I wasn't clear in the description. In all cases, the various steps are all steps within the same overall operation execution. So failure of any step triggers rollback.
                
> Validate composite operation steps just before executing them
> -------------------------------------------------------------
>
>                 Key: AS7-6306
>                 URL: https://issues.jboss.org/browse/AS7-6306
>             Project: Application Server 7
>          Issue Type: Enhancement
>          Components: Domain Management
>            Reporter: Brian Stansberry
>            Assignee: Brian Stansberry
>
> Say we have a composite operation with 2 steps:
> 1) /extension=org.jboss.as.messaging:add
> 2) /subsystem=messaging:add
> This will fail:
> Failed to execute batch: JBAS014739: No handler for add at address
> [("subsystem" => "messaging")] 
> This fails because at the time of validation the /subsystem=messaging:add is not valid.
> To illustrate, the execution order is
> Validate 1-2
> 1
> 2
> A possible solution is to convert this to the following:
> V1
> 1
> V2 (works now because 1 has registered the subsystem API)
> 2
> I think that should work but it's a very complex area, particularly in a managed domain, so it's not at all certain this would prove feasible. 

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