Figuring out how to use Monger (Clojure MongoDB library) with multiple databases

core.clj

(ns scratchpad.core
  (:require [monger.core :as mg]
            [monger.collection :as mc]
            [monger.query :as mq]))


(def local-mongodb
  (.getDB (mg/connect-via-uri! "mongodb://127.0.0.1:27017/local") "local"))


(def remote-mongodb
  (.getDB (mg/connect-via-uri! (System/getenv "REMOTE_MONGODB_URL")) "app9876543"))


(def collection-names
  ["A"
   "B"
   "C"
   "D"])


(defn -main
  [& args]
  (doseq [collection-name collection-names]
    (println collection-name)
    (println (mc/count local-mongodb collection-name {}))
    (println (mc/count remote-mongodb collection-name {}))))