+1 for open sourcing drcfg! Might be interesting to apply the same idea (drcfg) to the SS component model, where a component manages the atoms instead of having to def them. I did something very similar but on top of Curator. One component defined as a service discovery component, and others that depend on it. The discovery component exposes a "listenable" interface; when a service is discovered the callbacks are fired and the dependent components are notified.
Related but slightly OT - I didn't think the component lib provided the ability to restart an individual component within a system? - Matt On Thursday, May 22, 2014 10:29:50 AM UTC-4, Thomas Steffes wrote: > > Currently config changes that require restart of a component are not > supported by our drcfg > > On Wednesday, May 21, 2014 12:59:18 PM UTC-4, Ben Mabey wrote: >> >> On 5/20/14, 3:33 PM, Thomas Steffes wrote: >> > Hey folks, >> > >> > At Room Key we're using Apache Zookeeper and a home-grown clojure >> > library called drcfg for real-time application configuration >> > management. We're debating open-sourcing drcfg and are trying to gauge >> > community interest in such a tool. >> > >> > We think it's got great usage semantics, basically you just def an >> > atom in any namespace where you'd like a variable that can be changed >> > in real-time on a running system. When you define the atom, you can >> > also provide defaults to fall back to if zookeeper is unavailable, a >> > validator to be run on any value when a change is attempted (to >> > prevent invalid configuration data), as well as some meta-data about >> > the variable. >> > >> > We've also got a web UI we use to change configuration data, but that >> > would likely be released separate of drcfg itself. >> > >> > If anyone's interested, could you reply to this post? I can provide >> > more information as well if need be. >> > >> > >> > -Thomas Steffes @ Room Key >> > >> Hi Thomas, >> I'd be interested in learning more about your solution. Have you ever >> ran into the case where a config change needs to restart a component? >> If so, have you written the logic that handles the updating of your >> entire system based on this change? e.g. a new DB config requires that >> your DB component be restarted and each component that relies on the DB >> component be restarted as well to get the new connection. >> >> Thanks, >> Ben >> > -- 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 --- You received this message because you are subscribed to the Google Groups "Clojure" group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
