http://www.theserverside.com Most recent forum messages en Jive Forums Silver 5.5.30 (www.jivesoftware.com) Sat, 18 May 2013 03:18:07 -0400 http://www.theserverside.com/discussions/thread.tss?thread_id=40089 Thu, 27 Apr 2006 09:40:01 -0400 Thu, 27 Apr 2006 09:40:01 -0400 Thu, 27 Apr 2006 09:40:01 -0400 Apr 27, 2006 Debashish Ghosh 0 http://www.theserverside.com/discussions/thread.tss?thread_id=40089    Suppose I use Read_Commited. Than, what happens when say at a rare instance, Two clients read the exact same data at the exact same time & passed checkAndUpdateVersion(). say the version was 10 before and they...]]> Wed, 26 Apr 2006 23:52:13 -0400 Wed, 26 Apr 2006 23:52:13 -0400 Wed, 26 Apr 2006 23:52:13 -0400 Apr 26, 2006 Sajid Moinuddin 1 http://www.theserverside.com/discussions/thread.tss?thread_id=40089    I would assume that before update u extract the actual version value from db and compare it with that of DTO . U can safely use the isolation level READ_UNCOMMITTED which is the most efficient but allow all dirty,repeatable...]]> Wed, 26 Apr 2006 11:09:13 -0400 Wed, 26 Apr 2006 11:09:13 -0400 Wed, 26 Apr 2006 11:09:13 -0400 Apr 26, 2006 Debashish Ghosh 0 http://www.theserverside.com/discussions/thread.tss?thread_id=40089 I am using versioning for optimistic locking pattern as described in ejb design pattern. all by business operations takes DTOs and does bulk operation. Now, I am keeping a version cmp field in my dtos and programatically increasing it for each...]]> Tue, 25 Apr 2006 06:34:05 -0400 Tue, 25 Apr 2006 06:34:05 -0400 Tue, 25 Apr 2006 06:34:05 -0400 Apr 25, 2006 Sajid Moinuddin 3