[rabbitmq-discuss] AMQP library APIs

Thu Aug 8 14:58:18 BST 2013

Alan Antonuk:

> That makes me wonder what is it that developers use channels for?  My understanding is they're were designed to be an 'error scope' at a protocol level. I don't see a lot of developers using them that way, and sometimes its the source of a bit of pain (having to recreate any resources that get destroyed as a result of a channel exception, or in bad cases, their whole app aborts because the channel dies).

For separating things that may require different error handling.

> My thinking is that an API could be created that internally uses channels intelligently to give more native feel to error handling. One example of changing the API might be: instead of apply basic.qos to a channel, you apply it to a consumer, and internally the library maps a consumer to a channel, so a BasicQos on a consumer.  The same can be done for other aspects of the protocol (this is what I ended up doing with SimpleAmqpClient).  A downside being the API may not map 1:1  to a lot of the documentation that is out there.

Nearly every other client exposes basic.qos on a channel, not a consumer. Not doing the same
will likely only cause more confusion at this point, not less.
--
MK

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