[jboss-dev-forums] [Design of POJO Server] - JBBOOT - Event listener and ServerInitializer APIs

[jaikiran]

Moving the email discussion with ALR, to the forum:

"jaikiran" wrote : > Hi Andrew,
  | >
  | >
  | > I was working on the JBBOOT-54 and had a few related questions:
  | >
  | > 1) In MCServer (impl-mc) what is the right time to expect the Kernel within the MC to be "set". Right now i see that it's being set during doStart() which is too late if someone wants to register to kernel events. I have this failing testcase (not committed)   http://pastebin.com/m3979391c This fails because the kernel is not set.
  | 


"ALR" wrote : 
  | Yep, I moved the bootstrap.run() and setup of the Kernel into the
  | initialize() method of AbstractMcServerBase.
  | 
  | Commits: http://fisheye.jboss.org/changelog/JBossAS/?cs=87976
  | 

"jaikiran" wrote : 
  | > 2) I am bad (just learning more) at generics, this is more of a "is there a better way to do this" question - The LifecycleEventHandler has the following API:
  | >
  | > public void handleEvent(Server<MCServer, MCServerConfig> server, LifecycleState state)   throws LifecycleEventException
  | >
  | > Assuming that the client registers a event handler for a MCServer event http://pastebin.com/m298f9c41is there a better was to work on a MCServer in the handleEvent method instead of doing a cast (line 26 in pastebin)? More importantly are there chances of getting a different type of server (i believe not, else it would be a bug), when the event handler was registered for MCServer?
  | 

"ALR" wrote : 
  | The Lifecycle Event Handling API was stupid, because there's no need to
  | pass the server back into handleEvent().  So I removed this.  Event
  | handlers that need to get at the server or Kernel (or whatever) can make
  | that an implementation detail supplied in the ctor, like:
  | 
  | [url]http://fisheye.jboss.org/browse/JBossAS/projects/bootstrap/trunk/impl-as/src/main/java/org/jboss/bootstrap/impl/as/lifecycle/AbstractKernelEventLifecycleEventHandler.java?r=87976
  | [/url]
  | Regarding your question about the generics, clearly they're wrong.  And the same pattern is used in ServerInitializer.  So I've got to revisit this and keep type safety (ideas welcome).
  | 

"jaikiran" wrote : > P.S: Is there an appropriate forum (user/dev) where we could discuss such questions?
  | 

"ALR" wrote : 
  | Sure, we can abuse Design of POJO Server.  Mind posting your questions and my responses there? 
  | 
  | 


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