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<a href="https://community.jboss.org/index.jspa" style="text-decoration: none; color: #E1E1E1">JBoss Community</a></h1>
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Re: jboss-modules: Module Repository SPI and Extensibility
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created by <a href="https://community.jboss.org/people/ALRubinger">Andrew Rubinger</a> in <i>JBoss AS 7 Development</i> - <a href="https://community.jboss.org/message/772248#772248">View the full discussion</a>
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<div class="jive-rendered-content"><p>I've actually been giving this some thought, too, but left it out of this discussion for the time-being.  Now that you raise it, what the hell. <span> :) </span></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>If we were to build out a remote repository of modules (much like Maven Central), it'd open the door to on-demand installation of services into JBossAS.  Carlo used to envision something like a "yum" or "apt-get" feature which could map a named service into a series of dependencies to be brought in and installed.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Additionally, we could perform upgrades of running services; it'd even be possible to have two versions of the same subsystem running concurrently in a single VM, provided we worked out a way to synchronize access to shared external resources (like ports).  It'd be nice to have a user application A running on JBossWeb version X alongside user application B running on JBossWeb version Y; users wouldn't have to touch application A until they're ready.  To some extent this is already possible by bundling frameworks inside the deployment.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>The real value-add for me here is that we'd essentially be able to match what RHN (Red Hat Network) does for RHEL - provide a subscription service to push one-click upgrades to all servers in a Domain or ServerGroup.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>One obvious hitch I see is the use of "main" as a default; I suspect that modules would have to become more explicit about the versions they depend upon.  As it stands, JBossAS ships with a single module repository populated with the versions it needs - we'd have to expand this notion such that all modules would be aware that they could be housed in a much more expansive repository (which would grow over time) and be explicit about their versioned dependencies.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Has any of the above been discussed/planned in the context of JBossAS.next?</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>S,<br/>ALR</p></div>
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