I was thinking about the well known idea of connecting to a REPL in a production system and fixing things on the fly without downtime. Rich talks about this in his presentations.
I am kind of embarrassed to ask this, but is there a "correct way" to do this . Do you simply re-def a function, e.g., to time execution: (def old-f f) (defn f [] (time old-f)) Under which conditions (e.g. which kind of Java interoperability) is this thread safe? Supposing only clojure functions are calling f; it would be thread safe, right? Or should one anticipate this up front by making f a ref, e.g., supposing the production program has (def f (ref (fn [x] x))) we open the repl and do e.g. (def old-f @f) (dosync (ref-set f (fn [x] (time (old-f x))))) Coming from a Java concurrency background I guess I am trying to understand the concurrency semantics of def in terms of the Java model. Liking clojure more every hour ;-) /krukow --~--~---------~--~----~------------~-------~--~----~ 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 To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/clojure?hl=en -~----------~----~----~----~------~----~------~--~---
