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Merge pull request #1 from dlebrero/master
ServletContextListener to run clojure functions at startup/shutdown
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(defproject org.lpetit.ring/ring-java-servlet "0.1.0" | (defproject org.lpetit.ring/ring-java-servlet "0.2.0" | ||
:description "Ring generic servlet for using ring without AOT." | :description "Ring generic servlet for using ring without AOT." | ||
:url "http://github.com/laurentpetit/ring-java-servlet" | :url "http://github.com/laurentpetit/ring-java-servlet" | ||
:dependencies [[ring/ring-servlet "0.3.5" :exclusions [javax.servlet/servlet-api]]] | :dependencies [[ring/ring-servlet "1.1.0" :exclusions [javax.servlet/servlet-api]]] | ||
:dev-dependencies [[javax.servlet/servlet-api "2.5"]] | :profiles {:provided | ||
:aot [org.lpetit.ring.servlet.RingHttpServlet]) | {:dependencies | ||
[[javax.servlet/servlet-api "2.5"]]}} | |||
:aot [org.lpetit.ring.servlet.RingHttpServlet org.lpetit.ring.servlet.RingServletContextListener]) |
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19 changes: 19 additions & 0 deletions
19
src/org/lpetit/ring/servlet/RingServletContextListener.clj
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(ns org.lpetit.ring.servlet.RingServletContextListener | |||
(:use org.lpetit.ring.servlet.util) | |||
(:gen-class :implements [javax.servlet.ServletContextListener]) | |||
(:import [javax.servlet ServletContextEvent])) | |||
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(defn run [contextEvent symbol-str] | |||
(let [ctx (.getServletContext contextEvent)] | |||
(if-let [the-fn (.getInitParameter ctx symbol-str)] | |||
(let [resolved-fn (require-and-resolve the-fn)] | |||
(resolved-fn ctx))))) | |||
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(defn -contextInitialized [this ^ServletContextEvent contextEvent] | |||
(run contextEvent "context-init")) | |||
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(defn -contextDestroyed [this ^ServletContextEvent contextEvent] | |||
(run contextEvent "context-destroy")) | |||
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(ns org.lpetit.ring.servlet.util | |||
(:import [javax.servlet ServletContext])) | |||
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(defn require-and-resolve [symbol-str] | |||
(let [[n h] (map symbol ((juxt namespace name) (symbol symbol-str)))] | |||
(require n) | |||
(ns-resolve (the-ns n) h))) | |||
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(defn context-params [^ServletContext ctx] | |||
"Given a servlet context, it returns a map with all the context parameters. Keys are keywords." | |||
(into {} (for [param (enumeration-seq (.getInitParameterNames ctx)) | |||
:let [value (.getInitParameter ctx param)]] | |||
[(keyword param) value]))) |