deps.edn

{:paths ["."]
 :deps {clj-skkserv
        {:git/url "https://github.com/athos/clj-skkserv.git"
         :sha "fba7b099252e3fb376be019b495ddee5da0ecd28"}
        org.apache.logging.log4j/log4j-core {:mvn/version "2.12.1"}}
 :aliases {:start {:main-opts ["-m" "clj-skkserv.main" "--handler" "skkserv-example/handler"]}}}

log4j2.xml

<?xml version="1.0" encoding="UTF-8"?>
<Configuration>
  <Appenders>
    <Console name="Console" target="SYSTEM_OUT">
      <PatternLayout pattern="%d{HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n"/>
    </Console>
  </Appenders>
  <Loggers>
    <Root level="debug">
      <AppenderRef ref="Console"/>
    </Root>
  </Loggers>
</Configuration>

skkserv_example.clj

(ns skkserv-example
  (:require [clj-skkserv.middleware :refer [wrap-conversion-only]]))

(def handler
  (-> (fn [_ content]
        (case content
          "rich" ["Rich Hickey"]
          "alex" ["Alex Miller"]
          nil))
      wrap-conversion-only))