Add API to list running modules and their dependencies

[CeylonMigrationBot]

[@FroMage] We're thinking of adding a CRaSH (http://www.crashub.org/) module to be able to attach to a running Ceylon VM (JVM) and list the available modules and their dependencies, but we need to find a way to get that list from a JVM agent. JMX, static somewhere, whatever.

@alesj: any idea? Do we already have something? This might be reusable for JBoss Modules beyond just Ceylon too.

[Migrated from ceylon/ceylon-runtime#28]

[CeylonMigrationBot]

[@alesj]
@dmlloyd does JBoss Modules already expose any MBeans?

[CeylonMigrationBot]

[@dmlloyd] Yes, it does, under jboss.modules I believe.

[CeylonMigrationBot]

[@FroMage] @vietj: is that enough to get started?

[CeylonMigrationBot]

[@vietj] The static method : java.lang.management.ManagementFactory.getPlatformMBeanServer() should do the work .

[CeylonMigrationBot]

[@vietj] Beside that you can also access the java.lang.Instrument object in a command too that gives you access to all the Class known by the JVM (hence the classloader as well).

[CeylonMigrationBot]

[@FroMage] Moving to M6, this will be part of the metadata API anyways.

[CeylonMigrationBot]

[@FroMage] Not part, but required.