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From Gregory Bayard <gregory.bay...@gmail.com>
Subject Re: Sending a message to a custom QPID direct exchange from Python
Date Wed, 16 Feb 2011 15:34:16 GMT
I did a clean install of Python with the 0.8 module and it is working
as expected on both Windows and Linux, so I was clearly
troubleshooting the wrong things.  I previously had the 0.6 version
installed before I added the 0.8 version.  Thanks for your responses
and suggestions!


On Tue, Feb 15, 2011 at 6:32 AM, Gordon Sim <gsim@redhat.com> wrote:
> On 02/14/2011 09:45 PM, Gregory Bayard wrote:
>> Hi Gordon,
>> I was originally working with 0.6 and the double-quoting was a quick
>> attempt to find some problem with my exchange and queue specification.
>>  When I updated my addressing string for Qpid 0.8, I still get the
>> same result.  The message is picked up by topic listeners listening to
>> the masterserver.summary.queue' topic on the 'masterserver.direct'
>> exchange.  The string, as you specified, is now:
>> "masterserver.direct/masterserver.summary.queue; {create: always,
>> node: {type:topic, x-declare:{type:direct}}}"
> To be clear, I don't think you need the "; {create: always, node:
> {type:topic, x-declare:{type:direct}}}" part, that was just as an example of
> the correct syntax.
>> Keep in mind this queue will essentially always have been created by
>> the C++ server which is essentially guaranteed to start before any
>> Python clients.  I just can't figure out anyway to get Python to send
>> messages to the 'masterserver.summary.queue' on the
>> 'masterserver.direct' exchange.
> Just to be clear, are you saying that creating a sender in python for the
> address "masterserver.direct/masterserver.summary.queue" and then sending a
> message with that, the messages do not get to the queue in question?
> That works fine for me, are you sure you don't have older python libs on
> your path?
>> However, I have no problem sending
>> messages to the 'amq.direct' direct exchange from Python.  This issue
>> seems to be limited to custom direct exchanges.  Any suggestions on
>> how I could get a message via the custom direct exchange created by
>> the C++ from Python to the C++ server's queue would be greatly
>> appreciated.
> Are you getting errors or the messages just appear to be dropped? As I say
> it works fine for me with 0.8 packages. See attached client and server. The
> server is a modified version of the old example that I think matches what
> you describe, the client is a simple python program that sends to
> "masterserver.direct/masterserver.summary.queue". Start the server first,
> then run the client and that all works for me, does it work for you?
> Btw, there is a messaging API in c++ as well that I think is a lot simpler
> than the old qpid/client API. It is conceptually similar to the python API
> you are using.
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