notify.clj

(ns noti.notify
  (:require [noti.notification :as n]
            [io.pedestal.service.log :as log]))

(defprotocol Notifiable
  (notify! [_ x]))

(defmacro notifiable [body]
  `(reify Notifiable
     (notify! [_ notification]
       (try
         ~body
         (catch Exception e# (log/error :msg (.getMessage e#)))))))

(def log-notifier
  (notifiable (spit "resources/public/notifications.txt"
                    (clojure.string/join "" [(n/text notification) "\n"])
                    :append true)))

Although possible, I think it's best to avoid magic params like 'notification' in macro usage – line 17.