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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>We’re using protocol buffers to encode/decode packets and use
AMQP as RPC transport with RPC interface specified in protocol buffers.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Also we have REST frontend that translates REST requests into
protocol buffers RPC calls.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
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<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>
rabbitmq-discuss-bounces@lists.rabbitmq.com
[mailto:rabbitmq-discuss-bounces@lists.rabbitmq.com] <b>On Behalf Of </b>vishnu<br>
<b>Sent:</b> Thursday, January 07, 2010 14:53<br>
<b>To:</b> rabbitmq-discuss<br>
<b>Subject:</b> Re: [rabbitmq-discuss] method-like calls<o:p></o:p></span></p>
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<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal style='margin-bottom:12.0pt'>if this is not meant to be
consumed by the outside world, aren't thrift or protocol buffers also good
options?<o:p></o:p></p>
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<p class=MsoNormal>On Fri, Jan 8, 2010 at 1:01 AM, Jim Irrer <<a
href="mailto:irrer@umich.edu">irrer@umich.edu</a>> wrote:<o:p></o:p></p>
<p class=MsoNormal style='margin-bottom:12.0pt'>Alexis -<br>
<br>
Funny you should ask now. I've just resumed working on an AMQP interface<br>
after getting input from our team members and have been doing a lot of design<br>
work. Our approach is to write our own code generator that writes code to<br>
do the serialization and de-serialization. The interface is specified as
a Java<br>
interface, and then we will be using Java introspection to get the methods and<br>
parameters. The code generator will be able to make code for any
language,<br>
but all I can see happening for the short term is Java and C++.<br>
<br>
The transport is in XML. We use XML a lot and are comfortable with the
technology.<br>
Messages are self-describing and verifiable. We are leaning towards a
slightly<br>
"heavier" transport that favors abstraction over speed. I think
that if we have<br>
situations where we need more speed, it will be situations like "we need
to get<br>
4 GB of medical images from here to there", in which case we'll either
open<br>
up a "raw" AMQP channel that does no formatting, or, even faster,
open up<br>
a socket connection.<br>
<br>
I had written an initial version of a library to interface to AMQP that I am
mostly<br>
discarding in favor of a re-write that makes implementing servers easier and
provides<br>
more flexibility (for example: server classes that support messages where some
must be replied<br>
to and others that are not, direct messages, and fanout messages).<br>
<br>
I've got chunks of code written but am still working on the lower level
design. The<br>
architecture is pretty much done. Lots more coding to do.<br>
<br>
I've thought about this (very fun) problem a lot, and have had a few
"epiphanies". There<br>
is a lot more details I'm not mentioning because there is so much. I
would be happy<br>
to answer any questions or trade ideas.<br>
<br>
PS: I don't always examine every rabbitmq-discuss message, so please feel free<br>
contact me directly.<br>
<br>
Thanks,<br>
<br>
- Jim<br>
<br clear=all>
Jim Irrer <a href="mailto:irrer@umich.edu" target="_blank">irrer@umich.edu</a>
(734) 647-4409<br>
University of Michigan Hospital Radiation Oncology<br>
519 W. William St. Ann Arbor, MI
48103<br>
<br>
<o:p></o:p></p>
<div>
<p class=MsoNormal>On Thu, Jan 7, 2010 at 12:24 PM, Alexis Richardson <<a
href="mailto:alexis@rabbitmq.com" target="_blank">alexis@rabbitmq.com</a>>
wrote:<o:p></o:p></p>
<p class=MsoNormal>Jim<br>
<br>
Please can I ask how you are getting on with this?<br>
<br>
I have a potential customer doing a mega project with Smartgrid who is<br>
facing the issues you describe below. They are based in Michigan and<br>
were keen to hear any success stories and meet people locally who<br>
could help them find RabbitMQ development skills.<br>
<br>
Best wishes<br>
<br>
alexis<br>
<br>
RabbitMQ<o:p></o:p></p>
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<div>
<p class=MsoNormal><br>
<br>
On Tue, Aug 18, 2009 at 1:57 PM, Jim Irrer <<a href="mailto:irrer@umich.edu"
target="_blank">irrer@umich.edu</a>> wrote:<br>
> Hi -<br>
><br>
> We are replacing much of our SOAP infrastructure with AMQP, and<br>
> one problem we are looking at is how to wrap an AMQP call so that<br>
> it has a nice programming interface. Basically we want to serialize<br>
> an object on one side and de-serialize on the other side, and do it<br>
> in a language independent way (we use Java C#, and C++).<br>
><br>
> I am looking at REST (Representational State Transfer), XML-RPC,<br>
> and possibly JSON-RPC. Ideally we would like something that<br>
> automatically does the serialization/de-serialization or generates<br>
> code that does it.<br>
><br>
> Has anyone found a technology that they like?<br>
><br>
> Thanks,<br>
><br>
> - Jim<br>
><br>
> Jim Irrer <a href="mailto:irrer@umich.edu" target="_blank">irrer@umich.edu</a>
(734) 647-4409<br>
> University of Michigan Hospital Radiation Oncology<br>
> 519 W. William St. Ann Arbor, MI
48103<br>
><o:p></o:p></p>
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