[jboss-jira] [JBoss JIRA] (JGRP-1828) Allow protocols to define inline XML config

[Bela Ban (JIRA)]

    [ https://issues.jboss.org/browse/JGRP-1828?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12963951#comment-12963951 ] 

Bela Ban commented on JGRP-1828:
--------------------------------

OK, schema generation is done, too. We use {{@XmlInclude}} and {{@XmlElement}} to generate the schema. See {{FORK}} and {{RELAY2}} for examples.
                
> Allow protocols to define inline XML config
> -------------------------------------------
>
>                 Key: JGRP-1828
>                 URL: https://issues.jboss.org/browse/JGRP-1828
>             Project: JGroups
>          Issue Type: Feature Request
>            Reporter: Bela Ban
>            Assignee: Bela Ban
>             Fix For: 3.5
>
>
> Some protocols (e.g. RELAY2 or FORK) need additional configuration, which is usually defined in a separate XML file, e.g.
> {code:xml}
> <FORK config="/home/bela/fork-stacks.xml"/>
> {code}
> File {{fork-stacks.xml}} is:
> {code:xml}
> <fork-stacks xmlns="fork-stacks">
>     <fork-stack id="counter">
>         <config>
>             <COUNTER bypass_bundling="true"/>
>             <COMPRESS/>
>         </config>
>     </fork-stack>
>    <fork-stack id="locking">
>        <config>
>            <CENTRAL_LOCK num_backups="2"/>
>        </config>
>    </fork-stack>
> </fork-stacks>
> {code}
> It would be nice to be able to optionally define such additional configuration inline, e.g.
> {code:xml}
> <FORK>
>   <fork-stacks xmlns="fork-stacks">
>       <fork-stack id="counter">
>           <config>
>               <COUNTER bypass_bundling="true"/>
>               <COMPRESS/>
>           </config>
>       </fork-stack>
>      <fork-stack id="locking">
>          <config>
>              <CENTRAL_LOCK num_backups="2"/>
>          </config>
>      </fork-stack>
>   </fork-stacks>
> </FORK>
> {code}
> As the schema for config files is *generated*, we would have to able to tell the generator ({{XMLSchemaGenerator}}) to include a schema fragment defined by any protocol.
> A schema fragment could be defined via an annotation, e.g. {{@IncludeSchema(schema="fork-stacks.xsd"}}.
> Investigate whether this is feasible.

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