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

[Jonathan Robie]

I hit an unexpected bottleneck thinking this through ... let me feel 
things out and get back with you tomorrow.

Jonathan

Andrew M wrote:
> Right, an example for FieldTable would be nice.  Maybe even a sample app
> showing a C++ program and a java program happily exchanging FieldTables
> populated with Strings, floats, longs..
>
> -----Original Message-----
> From: Jonathan Robie [mailto:jonathan.robie at redhat.com] 
> Sent: Thursday, July 17, 2008 4:41 PM
> To: Andrew M
> Cc: 'Ted Ross'; rhemrg-users-list at redhat.com; rhm-users at redhat.com
> Subject: Re: [Rhm-users] RE: [Rhemrg-users-list] XML Exchanges
>
> 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_Tu
> torial/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_Tu
> torial/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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>>     
>
>
>