[jboss-dev-forums] [Design of POJO Server] - Re: Controlling deployments via a barrier bean

[alesj]

"scott.stark at jboss.org" wrote : 
  | To properly handle this we would need the ability to expand the states for the component in question to allow for alternate DESCRIBE, DESCRIBE_CLUSTERED, DESCRIBE_SINGLETON states depending on the cluster metadata associated with the bean. Currently the mc state machine does not allow for this choice type of state transition. I have not worked much with the lower level state manipulation so I could also be talking out of my ass, but I think this is the proper way to do it.
  | 
This could be achieved.
OK, it would still depend on exactly what you wanted to do - no cyclic/fork states.

You can do this atm.
Add these two new states (DESCRIBE_CLUSTERED, DESCRIBE_SINGLETON) to Controller.
Then when you install a bean that would use any of those two states, you need to push him your own ControllerContextActions impl.
e.g. our alias handling

  |       Map<ControllerState, ControllerContextAction> map = Collections.<ControllerState, ControllerContextAction>singletonMap(ControllerState.INSTALLED, new AliasControllerContextAction());
  |       ControllerContextActions actions = new AbstractControllerContextActions(map);
  |       install(new AliasControllerContext(alias, original, actions));
  | 

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