java - Initialization hook for Clojure Noir WAR/Servlet (CloudFoundry) -

java - Initialization hook for Clojure Noir WAR/Servlet (CloudFoundry) -

i'm building clojure noir web application run war file in cloudfoundry.

in project.clj have:

:ring {:handler appname.server/handler}

in server.clj create handler using noir:

(def handler (noir.server/gen-handler {:ns 'appname}))

i build war file using lein ring plugin:

lein ring uberwar

then force cloudfoundry using:

vmc force appname

the request handler works fine , can browse url of application fine.

so question is: right way initialization when application started?

i can next in server.clj:

(when (system/getenv "vcap_application") (init-func))

but there couple problems that. first, seems doing initialization @ wrong time (when code read/eval'd rather on app start). second, protector specific cloudfoundry , there proper general war way this.

i think purpose of contextinitialized method on servletcontextlistener how hook in noir/ring?

figured out looking @ ring source war handling

the project.clj :ring map takes :init keyword so:

:ring {:init appname.server/my-init :handler appname.server/handler}

the my-init function called on application startup.

caveat: apparently balloons amount of memory needed application initial startup. 128m sufficient without initialization. initialization code , app startup failed, had bump memory 256m. suspect init code jvm doesn't have time garbage collect before clojure code compiled/executed.

java clojure war leiningen