amqp-bindmap — archive

[Shawn McAllister]

>> Fair enough on the wire, but since JMS supports only topics/queues for >> addressing today, why not define such fixed prefixes for use by JMS >> and all other topic/queue based MoMs and then avoid the complex broker/client >> interaction of making these configurable/vendor-specific?   Ie. why would we >> want them to be different? > >We might not want them to be different. >The main issue is likely to be that they already do differ in existing systems because the address string doesn't have a defined syntax, >and changing them to a particular fixed value might not be feasible in all cases. right - and that can be a problem for systems developed before a spec is completed – and it is a hassle. However, there are presumably going to be other incompatibilities in addition to this issue between any existing systems (where the incompatibilities are different for each existing system) and what the final mappings specification says and I would hate to set a precedence for needing a negotiation/dynamic mechanism of handling each of those that we find – and then maybe still not enough since we don’t know the ones we don’t know. I don’t think we should let pre-standards work impose complexity that we will need to live with forever.  Ie. more configuration or negotiation, needing to do mappings both for published messages and subscriptions and then imposing these issues on administrators – it will not help encourage adoption. If existing systems/products did something different, I would prefer that they use the typical solution of them using system-specific ways to go from their own on pre-standard version to the standard – and do this as they see fit vs burdening the standard with (dynamic) mechanisms to adapt to pre-standard versions whose characteristics we likely don’t fully understand. That’s why I’d prefer to just define a specific prefix for the identifier of a topic or queue to differentiate them from each other (and others in the Addressing spec) and leave it at that. Shawn