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   Re: [xml-dev] ( Slightly off topic ) JMS and other messaging

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On Wednesday 18 September 2002 14:26, Maciejewski, Thomas wrote:

> Anyway. Does any one here use XML and messaging?

Not with XML, no, but JMS is useful for me.

Case 1: Our application lets lots of people edit the same stuff. We use a JMS 
topic for clients to register for notification of changes so they can show 
other people's actions. Fairly standard stuff.

Case 2: One module processes a big list of little tasks, but needs to 
acknowledge completion of them with the server. This is often what it blocks 
on since acknowledgement requires locks on certain database structures. What 
we're moving towards is having the module submit its completion acks into a 
persistent queue, and a low-priority thread on the server sort 
them out in a single sequence (avoiding all the database locking 
overheads...) when there's nothing better to do. Submitting the acks into the 
queue should be a fast operation, therefore not keeping worker threads 
hanging around so much.


A city is like a large, complex, rabbit
 - ARP


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