Refresh logback.xml from a Clojure REPL

log.clj

(ns app.log
  (:require [clojure.java.io :as io])
  (:import ch.qos.logback.classic.joran.JoranConfigurator
           ch.qos.logback.classic.LoggerContext
           org.slf4j.LoggerFactory))

(defn reload-logback
  []
  (let [context ^LoggerContext (LoggerFactory/getILoggerFactory)
        configurator (JoranConfigurator.)
        config (io/resource "logback.xml")]
    (assert config)
    (.reset context)
    (.setContext configurator context)
    (.doConfigure configurator config)))