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

[Bela Ban (JIRA)]

Bela Ban created JGRP-1828:
------------------------------

             Summary: 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 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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