Andrew Scott wrote: >> <cfset application.flag = true /> > > no on its own that can not cause a race condition, but if somewhere else > there is a read on that variable somewhere then that will cause a race > condition.
No it doesn't. The third factor you need is a statement that sets application.flag to something else then true. The fourth factor you need is that your read actually does something wrong if it gets a different value then it expected / should get. > So in that scenario if it potentially can cause a race condition then lock > it, as Ben Forta says. > > Now as this debate is being discussed because of a CFC inside of a session > scope, there is an extremely high chance that a race condtion is going to > occur, so as Ben says lock it. This debate is in the context of a userbean in the session scope and sessions that end prematurely. I would not bother with locking now. Sure, in the case of an update to the bean that may give you a one in a million chance that on one request you see somebodies old address but his new postcode. Big deal. What it does not influence is the chance of a premature session end. And since that is an actual, frequently occurring problem for OP, the focus should be on solving that problem. Jochem ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~| Macromedia ColdFusion MX7 Upgrade to MX7 & experience time-saving features, more productivity. http://www.adobe.com/products/coldfusion?sdid=RVJW Archive: http://www.houseoffusion.com/groups/CF-Talk/message.cfm/messageid:275261 Subscription: http://www.houseoffusion.com/groups/CF-Talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4
