Re: [Caml-list] [ANN] Netamqp, a client for AMQP-0-9-1

[Gerd Stolpmann <info@gerd-stolpmann.de>]

Am Montag, den 19.09.2011, 18:08 +0100 schrieb Richard W.M. Jones:
> On Mon, Mar 28, 2011 at 04:03:09PM +0200, Gerd Stolpmann wrote:
> > the ocaml team at Mylife is proud to release another library to the
> > public: Netamqp is a client of the AMQP-0-9-1 protocol which is used to
> > talk to message queue servers. Netamqp is an independent implementation
> > of such a client, and not simply a wrapper around a C library.  Netamqp
> > has been tested against RabbitMQ.
> 
> Gerd, have you tried to interoperate with any other language?

Well, this was developed for Mylife in a project where the sender was
written in Python. (I don't have access to this code anymore, though,
since I left Mylife.)

> I tried examples/t_sender.ml along with the following Python receiver
> (all on the same RabbitMQ instance), but the Python code didn't appear
> to see any messages at all.  I'm quite probably doing something stupid.

What's missing here is that you need to bind the queue to an exchange.
Remember that t_sender only sends the message to the exchange amq.direct
with a routing key of test_xy_routing_key. It does not send the message
to test_xy directly (which is not possible). Without binding, the
exchange just drops unroutable messages.

Don't know exactly how to bind in Python, but watch out for a method
queue_bind.

Gerd


> 
> ----------------------------------------------------------------------
> #!/usr/bin/python
> 
> import pika
> 
> connection = pika.BlockingConnection(pika.ConnectionParameters(
>         'localhost'))
> channel = connection.channel()
> 
> channel.queue_declare(queue='test_xy')
> 
> def callback(ch, method, properties, body):
>     print " [x] Received %r" % (body,)
> 
> channel.basic_consume(callback,
>                       queue='test_xy',
>                       no_ack=True)
> 
> print ' [*] Waiting for messages. To exit press CTRL+C'
> channel.start_consuming()
> ----------------------------------------------------------------------
> 
> Rich.
> 
> -- 
> Richard Jones
> Red Hat
> 

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