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From Rajith Attapattu <rajit...@gmail.com>
Subject Re: Erlang client for Qpid C++ Broker
Date Tue, 29 May 2012 13:12:34 GMT
Please keep us posted on your progress.
Other folks who are looking for the same could potentially use your
solution until we come up with a proper longer term solution.

Rajith

On Tue, May 29, 2012 at 8:20 AM, Zhemzhitsky Sergey <
Sergey_Zhemzhitsky@troika.ru> wrote:

> >Sorry if I gave the wrong impression. What I meant was that you can use
> "proton-c" to get an erlang driver and then use that as the basis for
> creating an erlang client.
> >In time the c++ broker will also speak AMQP 1.0 That's why I mentioned
> this as a potential longer term solution!
> >I'm afraid I don't see a short term solution that could help you
> immediately.
>
> I see. I suppose I will try linked-in drivers or NIFs as a short-term
> solution.
>
>
> Best Regards,
> Sergey
>
> -----Original Message-----
> From: Rajith Attapattu [mailto:rajith77@gmail.com]
> Sent: Tuesday, May 29, 2012 3:33 PM
> To: users@qpid.apache.org
> Subject: Re: Erlang client for Qpid C++ Broker
>
> On Tue, May 29, 2012 at 5:09 AM, Zhemzhitsky Sergey <
> Sergey_Zhemzhitsky@troika.ru> wrote:
>
> > Hi Rajith,
> >
> > I cannot find any erlang stuff under
> > http://svn.apache.org/repos/asf/qpid/proton/trunk/proton-c/.
> >
>
> Sorry if I gave the wrong impression. What I meant was that you can use
> "proton-c" to get an erlang driver and then use that as the basis for
> creating an erlang client.
> In time the c++ broker will also speak AMQP 1.0 That's why I mentioned
> this as a potential longer term solution!
> I'm afraid I don't see a short term solution that could help you
> immediately.
>
> Rajith
>
> Moreover c++ broker does not support ampq 1.0 at the moment.
> >
> > Best Regards,
> > Sergey
> >
> > -----Original Message-----
> > From: Rajith Attapattu [mailto:rajith77@gmail.com]
> > Sent: Monday, May 28, 2012 9:42 PM
> > To: users@qpid.apache.org
> > Subject: Re: Erlang client for Qpid C++ Broker
> >
> > Erlang does not have a swig binding.
> > Your bet best is to do an Erlang driver. But AFIK drivers can only be in
> C.
> > Therefore you might have to get a C wrapper around the C++
> >
> > Even if you get all that going, the difference in the programming
> > paradigms (functional vs oo) might prevent you from getting the best
> > out of erlang and it's capabilities.
> >
> > A more longer term solution is to probably look at using the proton-c
> > stuff (written using C and is AMQP 1.0), where you can get an erlang
> > driver for the AMQP protocol stuff.
> > And then build an API using the idioms that are more suitable for a
> > functional language and erlang.
> > This approach IMO is more suited for getting a more a useful erlang
> > client which can be properly exploited in an erlang env.
> >
> > Rajith
> >
> > On Mon, May 28, 2012 at 2:47 AM, Zhemzhitsky Sergey <
> > Sergey_Zhemzhitsky@troika.ru> wrote:
> >
> > > Hello Carl,
> > >
> > > Thanks a lot for suggestion.
> > > It seems that swig lib does not support erlang currently, but erlang
> > > itself has some ways to interoperate with the native languages.
> > >
> > >
> > > Best Regards,
> > > Sergey
> > >
> > >
> > > -----Original Message-----
> > > From: Carl Trieloff [mailto:cctrieloff@redhat.com]
> > > Sent: Saturday, May 26, 2012 12:17 AM
> > > To: users@qpid.apache.org
> > > Subject: Re: Erlang client for Qpid C++ Broker
> > >
> > >
> > >
> > > Late to the thread -- why not use cqpid swig lib to erlang?
> > >
> > >
> > >
> > > On 05/25/2012 03:51 AM, Zhemzhitsky Sergey wrote:
> > > > Hi guys,
> > > >
> > > > Introduction of new java brokers just to bridge erlang or any
> > > > other
> > > clients is like to shoot sparrows with a cannon to my mind. It's a
> > > pity that amqp protocol versions are not interoperable.
> > > > Fortunately programming languages provide different ways to make
> > > > calls
> > > to a native code.
> > > >
> > > >
> > > > Best Regards,
> > > > Sergey
> > > >
> > > >
> > > > -----Original Message-----
> > > > From: Ilyushonak Barys [mailto:Barys_Ilyushonak@troika.ru]
> > > > Sent: Friday, May 25, 2012 11:32 AM
> > > > To: users@qpid.apache.org
> > > > Subject: RE: Erlang client for Qpid C++ Broker
> > > >
> > > > Hi, Frase
> > > >
> > > > Thank you very much for the explanation.
> > > > The one more thing we can do is to move our clients to rabbitmq
> > directly.
> > > > As far as we use camel a lot, it looks much easier than adopt qpid
> > > > java
> > > to rabbitmq client.
> > > >
> > > > But. The way we would like to achieve - is to keep qpid c++
> > performance.
> > > So, we are going to investigate it.
> > > >
> > > > Regards,
> > > > Boris
> > > >
> > > > -----Original Message-----
> > > > From: Fraser Adams [mailto:fraser.adams@blueyonder.co.uk]
> > > > Sent: Friday, May 25, 2012 11:20 AM
> > > > To: users@qpid.apache.org
> > > > Subject: Re: Erlang client for Qpid C++ Broker
> > > >
> > > > Hi Guys,
> > > > I think that's a fair point, though to be fair the approach Alex
> > > suggested is really just an instance of a message bridge, which is a
> > > standard Integration Pattern. It's clearly not ideal but ultimately
> > > you have an integration problem to solve. We've had similar
> > > scenarios bridging between qpid and ActiveMQ - in our case we used
> > > Apache Camel as it has a qpid endpoint and integrates well with
> > > ActiveMQ, but ultimately the issues are pretty similar to yours.
> > > >
> > > > Also in many topologies it's pretty common to federate brokers - I
> > > > guess
> > > it depends on your architecture but a fairly common pattern in a
> > > geographically distributed system would be for clients to publish to
> > > a local broker and for that broker to be federated to other
> > > locations, it might be slightly counterintuitive but in that sort of
> > > scenario you are likely to improve reliability of the overall system
> > > and certainly improve things from the perspective of the publishing
> > > client. Clearly if your architecture comprised a single C++ broker
> > > with clients publishing/consuming directly to it then there's a
> > > potential reduction in reliability due to probabilities (MTBF) being
> > > multiplicative on components connected in series.
> > > >
> > > > One option (though adds a little more complexity) would be to to
> > > > stand
> > > up a couple of parallel instances of the Java broker and load
> > > balance between them, that's useful from a scaling perspective if
> > > you have
> > "peaky"
> > > performance characteristics but more usefully if one falls over the
> > > other carries on.
> > > >
> > > > Sorry that I can't be of more practical help, but hopefully I can
> > > > reassure you that the sort of problems/choices/compromises you're
> > > > having to make are pretty common sometimes it's a case of gritting
> > > > teeth and doing what's "least worst" as opposed to elegant -
> > > > that'll be the difference between engineering and theory :-)
> > > >
> > > > I expect most of us are going to be faced with "comedy"
> > > > integration
> > > problems when AMQP 1.0 starts to roll out. I *really hope* hint hint!!!
> > > > that the qpid brokers for AMQP 1.0 are going to be bilingual
> > > > 0.10/1.0 or
> > > I'm going to have some fun....
> > > >
> > > > Good luck
> > > > Frase
> > > >
> > > >
> > > > On 25/05/12 07:47, Zhemzhitsky Sergey wrote:
> > > >> Hi Alex,
> > > >>
> > > >> Thanks a lot, but this sounds pretty horrible, I suppose.
> > > >> Introducing new java brokers just to forward  messages to c++
> > > >> broker
> > > increases complexity of the overall system and decreases its
> reliability.
> > > >>
> > > >> Best Regards,
> > > >> Sergey
> > > >>
> > > >>
> > > >> -----Original Message-----
> > > >> From: Oleksandr Rudyy [mailto:orudyy@gmail.com]
> > > >> Sent: Thursday, May 24, 2012 8:28 PM
> > > >> To: users@qpid.apache.org
> > > >> Subject: Re: Erlang client for Qpid C++ Broker
> > > >>
> > > >> Hi Sergey,
> > > >>
> > > >> You cannot use 0.9.1 amqp client with broker supporting only 0.10
> > > >> amqp
> > > protocol.
> > > >>
> > > >> Java Qpid Broker supports both 0.10 and 0.9.1 protocols.
> > > >>
> > > >> You can publish messages with Erling client into Qpid Java Broker
> > > >> (or
> > > RabitMQ broker) and use Qpid java client to consume messages from
> > > that broker and publish them into c++ Qpid broker.
> > > >>
> > > >> Kind Regards,
> > > >> Alex Rudyy
> > > >>
> > > >> On 24 May 2012 16:18, Zhemzhitsky
> > > >> Sergey<Sergey_Zhemzhitsky@troika.ru>
> > >  wrote:
> > > >>> Hi there,
> > > >>>
> > > >>> I have to use qpid c++ broker 0.12 from erlang.
> > > >>> Are there any erlang clients that can be used to connect to the
> > > >>> qpid
> > > c++ broker, except for rabbitmq client?
> > > >>> If there isn’t, have anybody succeeded in connecting rabbitmq
> > > >>> erlang
> > > client that supports amqp 0.9.1 to the qpidd c++ broker that
> > > supports amqp
> > > 0.10 only?
> > > >>>
> > > >>> Best Regards,
> > > >>> Sergey
> > > >>>
> > > >>>
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> > > >
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