Topic now synchronous

[timfox]

I have implemented classes Subscription and DurableSubscription and made topic synchronous as discussed in Neuchatel.

This has solved several problems mainly related to delivery.

I think some more thought could be given to the core Topic and Queue hierarchy, I would suggest a common superclass CoreDestination perhaps.

This would allow us to deal with them consistently in the jms facade, right now they are handled as Receiver and Distributor which works but is a bit messy.

[ovidiu.feodorov]

This is how it was originally, but after refactoring I didn't feel the need for a common superclass, since both of them were handled as Channels.

[timfox]

Right.

Prevously Channel provided the comon superclass but now Topic is no longer a Channel, we're left with distributor and receiver.

Problem is since Queue already extends TransactionalChannelSupport it's not quite so simple - one option would be to modify Queue to *not* extend TranactionChannelSupport but instead extend the "new" core destination class (whatever it is) and delegate to an internal instance of Channel.