[jboss-dev-forums] [Design of Clustering on JBoss (Clusters/JBoss)] - Re: JBAS-4919 - ha singletons in heterogenous topologies

[galder.zamarreno@jboss.com]

"bstansberry at jboss.com" wrote : Would #1 be that bad? You create ExtendedHASingletonElectionPolicy with the missing methods from the AS 5 API. If the injected policy implements Extended, you invoke on it the way AS 5 does. Otherwise it gets used as it is now.  In ExtendedHASingletonElectionPolicy javadoc, any HASingletonElectionPolicy methods that don't get called anymore should have comments noting that fact.
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  | Don't get me wrong; I can see how it would get messy. #3 is OK.

Hmm, looking at #1 again, I suppose it's the same thing that was done for HAMembershipExtendedListener. I'll go with #1.

"bstansberry at jboss.com" wrote : I know you did a lot of refactoring to tighten things up in trunk, i.e. with HASingletonElectionPolicyBase; that doesn't need to happen in 4.x, and *shouldn't* happen if it might break some custom subclass. HASingletonElectionPolicySimple just needs to work correctly.

Bingo! The aim for 4.2.x is just fixing it :)

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