Comments on: Handling messages out of order http://www.udidahan.com/2007/12/15/handling-messages-out-of-order/ Enterprise Development Expert & SOA Specialist Thu, 11 Mar 2010 11:59:32 -0600 http://wordpress.org/?v=2.8.4 hourly 1 By: RG http://www.udidahan.com/2007/12/15/handling-messages-out-of-order/comment-page-1/#comment-13802 RG Wed, 09 Jan 2008 20:41:14 +0000 http://udidahan.weblogs.us/2007/12/15/handling-messages-out-of-order/#comment-13802 Wow, the solution you propose is really ugly, the same as the previous solution with 'HandleCurrentMessageLater'. Ugly because it's unsafe (has a race condition), non-transactional (a big mistake), error prone and impossible to debug. And what if you have 3 messages - A, B and C, that need to be handled in order - how would your logic look then? If you need to process messages in order, use a single thread and don't worry about performance. Or implement more intelligent algorithm that will handle messages in parallel only when they are 'unrelated' - this is not very hard to do for a good programmer. Wow, the solution you propose is really ugly, the same as the previous solution with ‘HandleCurrentMessageLater’. Ugly because it’s unsafe (has a race condition), non-transactional (a big mistake), error prone and impossible to debug. And what if you have 3 messages – A, B and C, that need to be handled in order – how would your logic look then?
If you need to process messages in order, use a single thread and don’t worry about performance. Or implement more intelligent algorithm that will handle messages in parallel only when they are ‘unrelated’ – this is not very hard to do for a good programmer.

]]> By: udidahan http://www.udidahan.com/2007/12/15/handling-messages-out-of-order/comment-page-1/#comment-12808 udidahan Fri, 21 Dec 2007 07:31:05 +0000 http://udidahan.weblogs.us/2007/12/15/handling-messages-out-of-order/#comment-12808 That'll be the next post - how to do it with workflow and what problems it solves. For this post, I assumed Bill's scenario was that he got the messages into the queue in the right order but the processing ended up being out of order. But great question. That’ll be the next post – how to do it with workflow and what problems it solves. For this post, I assumed Bill’s scenario was that he got the messages into the queue in the right order but the processing ended up being out of order.

But great question.

]]> By: Ayende Rahien http://www.udidahan.com/2007/12/15/handling-messages-out-of-order/comment-page-1/#comment-12549 Ayende Rahien Sun, 16 Dec 2007 08:29:03 +0000 http://udidahan.weblogs.us/2007/12/15/handling-messages-out-of-order/#comment-12549 But doesn't this mean that a few milliseconds delay will cause a message to be bounced? Isn't it more appropriate to handle this with a retry count? But doesn’t this mean that a few milliseconds delay will cause a message to be bounced?
Isn’t it more appropriate to handle this with a retry count?

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