Hi Sean, I think there are two ways to do this;
1) Use an agent. You can "send-off" a fn to the agent with your select/update logic and this will run within the agent thread - guaranteed to be serial so you only need your select/update and no retry logic. The state of the agent is not important - you could just keep some useful info from each call, or maybe the db connection. Just remember to return that as the last item of your fn. You also need to have an appropriate error handler - see (doc agent). Note also that the error handling for agents has changed for clojure 1.2. 2.) Use a traditional db transaction - select ... for update, commit or roll-back and try again. You could use clojure.contrib.sql or there are a few other clojure sql libraries available. I personally just use java interop with jdbc directly. Don't use refs or atoms as they are not suited to fn's that perform side-effects - because they could and will be executed more than once (even if the side-effect is the last step). They are for use with shared access to in-memory immutable structures. -Hth, Adrian. -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
