Simple compojure handler with logging middleware

compojureHandler2.clj

(ns compojur-learning.core
  (:use compojure.core))

(defroutes handler
  (GET "/" [] (println "middle") {:status 200}))

(defn logging [chain] (fn [req] (
                                 (println "before")
                                 (chain req)
                                 (println "after"))))

(def app (-> handler logging))