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

[Ted Ross]

For what it's worth:  "FieldTable" and "map" are the same thing.  The 
AMQP version 0-10 type called "map" is implemented in C++ by a class 
called "FieldTable" (the name used in an older version of the AMQP spec 
if I'm not mistaken).  In Python, maps are implemented using native 
dictionaries.

I can help provide examples for C++ and Python.  For Java, I would need 
to confer with one of the Java folks to get an example.

-Ted

Jonathan Robie wrote:
> 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
>>>
>>> _______________________________________________
>>> Rhemrg-users-list mailing list  Rhemrg-users-list at redhat.com 
>>> <mailto:Rhemrg-users-list at redhat.com>  
>>> https://www.redhat.com/mailman/listinfo/rhemrg-users-list     
>>> 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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>>> Rhm-users at redhat.com
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>>>     
>>
>>
>>   
>