[rabbitmq-discuss] Unofficial guide to AMQP 1.0 PR3

Fri May 7 20:59:07 BST 2010

On Wednesday 05 May 2010 18:38:18 Michael Bridgen wrote:

> Flow control acts like a more fine-grained channel.flow for publishers,
> and like basic.qos for consumers; in each case, the receiving side
> issues *credit*, which the sending side uses up by transferring
> messages.  To do something like a basic.get, a consumer issues a single
> unit of *credit*, and waits for the single message to come in.

I hope I'm missing something, but this description jumped out at me as looking
like AMQP 1.0 is going to include one of (IMO) 0-10's biggest mistakes.

As someone using messaging mainly in web applications, basic.get is the best
thing in amqp. When response time matters, having a single command that polls
for a message and returns immediately if one isn't present is incredibly
useful. Replacing that with 2+ commands and replacing polling with waiting --
ouch.

JP

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