[jboss-jira] [JBoss JIRA] (AS7-2139) Provide an operation to resolve expressions

[Brian Stansberry (Resolved) (JIRA)]

     [ https://issues.jboss.org/browse/AS7-2139?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Brian Stansberry resolved AS7-2139.
-----------------------------------

    Fix Version/s: 7.1.0.Beta1
                       (was: 7.1.0.CR1)
       Resolution: Done


On the root resource for a server, or on the /host=xxx resource for a HostController, to get the value for an expression *on that process*, use

:resolve-expression(expression=${the.expression})

To get the value on every server in the domain, on the root resource on the master host controller (the DC), use

:resolve-expression-on-domain(expression=${the.expression})

To get the value on every server managed by a given host, on the /host=xxx resource, use

:resolve-expression-on-domain(expression=${the.expression})

The value for xxx in expression=xxx can be any text that can be converted to a DMR string. (So no DMR lists or objects). So these will work

:resolve-expression(expression=hello)

:resolve-expression(expression=10)

:resolve-expression

The first two result in a return value of ModelType.STRING that is the string form of what was passed in. (The return type of the operation is always STRING.) The last one will result in a return value of ModelType.UNDEFINED.

Basically, the server will take the passed in value and see if it's ModelType.EXPRESSION. If not it will convert it to a string and try to parse that string into a node of type EXPRESSION. If it's not expression syntax it will become a node of type STRING. It will then resolve that node and will pass back the result.

When I merge a jboss-dmr patch Scott Stark has submitted, the ModelNode.resolve() operation will start throwing an exception if the value is ModelType.EXPRESSION and the expression cannot be resolved. Once I merge that, these operations will return a failure if an expression cannot be resolved. Passing in a non-expression value will still work as above; that isn't considered a failure.
                
> Provide an operation to resolve expressions
> -------------------------------------------
>
>                 Key: AS7-2139
>                 URL: https://issues.jboss.org/browse/AS7-2139
>             Project: Application Server 7
>          Issue Type: Enhancement
>          Components: Domain Management
>            Reporter: Heiko Braun
>            Assignee: Brian Stansberry
>             Fix For: 7.1.0.Beta1
>
>
>  Add an op that would resolve expressions on every HC and server and return the set

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