Comments on: Asynchronous Callback R Us http://www.udidahan.com/2006/07/01/asynchronous-callback-r-us/ Enterprise Development Expert & SOA Specialist Sat, 11 Feb 2012 15:16:10 -0600 http://wordpress.org/?v=2.8.4 hourly 1 By: Ralf http://www.udidahan.com/2006/07/01/asynchronous-callback-r-us/comment-page-1/#comment-337 Ralf Sun, 02 Jul 2006 14:33:48 +0000 http://wp_630.weblogs.us/archives/294#comment-337 This looks nice - but if you look closely, you´ll see, the code you´re suggesting contains an uncertainity: SubmitOrder() needs to return before the callback can be assigned. So there exists a slight chance for the asycn operation to finish before SubmitOrder() returned. So what could happen is, the operation completes and there is no callback. This might be highly improbable - but think of Murphy´s law ;-) If this happens just every 1,000 times in a production system under load, you´ll have a hard time to find this "bug". -Ralf This looks nice – but if you look closely, you´ll see, the code you´re suggesting contains an uncertainity:

SubmitOrder() needs to return before the callback can be assigned. So there exists a slight chance for the asycn operation to finish before SubmitOrder() returned. So what could happen is, the operation completes and there is no callback.

This might be highly improbable – but think of Murphy´s law ;-) If this happens just every 1,000 times in a production system under load, you´ll have a hard time to find this “bug”.

-Ralf

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