[Rhm-users] RE: [Rhemrg-users-list] XML Exchanges

[Jonathan Robie]

I assume you mean examples for FieldTable? (You were thinking Map when 
you wrote this.)

I haven't done that for the tutorial yet, I'll consider it. But you can 
write anything you want into the message, it's opaque, so any way you 
want to get things in and out is fine.

Jonathan

Andrew M wrote:
>
> That’s excellent. If someone could add Python, C++ and Java examples 
> in this doc it would be very helpful.
>
> http://www.redhat.com/docs/en-US/Red_Hat_Enterprise_MRG/1.0/pdf/Messaging_Tutorial/Messaging_Tutorial.pdf 
>
>
> In the meantime… any suggestions where I should look for examples?
>
> Thanks,
>
> Andrew
>
> *From:* Ted Ross [mailto:tross at redhat.com]
> *Sent:* Thursday, July 17, 2008 2:10 PM
> *To:* Andrew M
> *Cc:* rhemrg-users-list at redhat.com; rhm-users at redhat.com
> *Subject:* Re: [Rhemrg-users-list] XML Exchanges
>
> Andrew M wrote:
>
> I need to put Map objects on the bus and pass them around for use by 
> java, C++ and (potentially).NET applications. Maps will definitely 
> consist of String-to-String mappings. There may also be 
> String-to-Float, or String-to-Long, etc. What is the best way to do 
> this? It does not appear that AMQP supports some native Map type like 
> JMS. Is the correct plan to have C++ apps translate the Map to/from 
> XML using this:
>
> http://www.codesynthesis.com/products/xsd/
>
> and java apps do the same using this:
>
> http://xerces.apache.org/
>
> Then put those bits of XML on the bus destined for an XML Exchange?
>
> This document...
>
> http://www.redhat.com/docs/en-US/Red_Hat_Enterprise_MRG/1.0/pdf/Messaging_Tutorial/Messaging_Tutorial.pdf 
>
>
> talks about XML based routing in Python and C++ but not in Java. Is it 
> not possible in Java?
>
> Thanks,
>
> Andrew
>
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>     
>
> Andrew,
>
> AMQP has a rich type system that can be used to encode data to be 
> placed in the payload of messages. Included is a "map" type that maps 
> string keys to typed objects (including recursive maps of maps). 
> Messages composed using AMQP types can be transferred via any type of 
> exchange and can be encoded and decoded in any of the supported 
> programming languages (C++, Python, Java).
>
> The XML exchange serves a completely different purpose. It allows 
> bindings to be created using xquery expressions. Xquery can be run 
> against the message headers or the message content (if the content is 
> XML) to determine whether or not to route the message to a particular 
> queue.
>
> -Ted
>
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