[jboss-dev-forums] [Design of Messaging on JBoss (Messaging/JBoss)] - Re: JBMESSAGING-519 - Failover(HA) design discussion

[ovidiu.feodorov@jboss.com]

The quotes that follow are from the HA Design document (http://wiki.jboss.org/wiki/Wiki.jsp?page=NewMessagingHADesign)

Clebert wrote : 
  | The idea is to have JBossConnection knowing the current state of subscriptions, producers and listeners.
  | 

Could you please qualify this a little bit more? The state of consumer/producers, as well as the state of their parent session and connection is maintained by their corresponding client-side delegates, as well as their server-side endpoints. So I don't exactly understand what you are trying to say with "have JBossConnection knowing the current state of subscriptions, producers and listeners".


Clebert wrote : 
  | JBossConnection (or an extension of that class) will have a list of other servers to be connected in case of failure.
  | 

How do you envision this list to be initially populated. How it is kept in synch?

Clebert wrote : 
  | One point we are leaving opened at this point is how to recover redeliviries of eventual already received messages.
  | 

Are you talking about persistent or non-persistent messages here?

Clebert wrote : 
  | JBossConnectionHA will be responsible for capturing creation events, storing then in a list and recreate its delegates when a Connection (RemotingConnection) is failed.
  | 

How about we don't have any JBossConnectionHA? A JBossConnection is "failover enabled" or not, depending on whether the "FailoverAspect" or "ClusterAspect" is present in its aspect stack or not.


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