我使用的是带有Langohr（clojure客户端）的RabbitMQ，如果消费者已经在运行，我可以很好地接收消息，但是如果我在客户端启动之前发送消息，客户端永远不会接收到这些消息。
是否有一个配置选项（或用于服务器和客户端的配置选项组合）可以确保客户端可以接收在其运行之前生成的消息？
我如何开始尝试测试或调试它？
我使用的是默认的exchange。下面是我用来设置客户端的代码：

(ns sisyphus.rabbit
  (:require
   [cheshire.core :as json]
   [langohr.core :as lcore]
   [langohr.channel :as lchannel]
   [langohr.exchange :as lexchange]
   [langohr.queue :as lqueue]
   [langohr.consumers :as lconsumers]
   [langohr.basic :as lbasic]
   [sisyphus.log :as log]))

(defn connect!
  [config]
  (let [connection (lcore/connect {})
        channel (lchannel/open connection)
        _ (lbasic/qos channel 1)
        queue-name (get config :queue "sisyphus")
        exchange (get config :exchange "")
        queue (lqueue/declare channel "sisyphus" {:exclusive false :durable true})
        routing-key (get config :routing-key "sisyphus")]
    (if-not (= exchange "")
      (lqueue/bind channel queue-name exchange {:routing-key routing-key}))
    {:queue queue
     :queue-name queue-name
     :exchange exchange
     :routing-key routing-key
     :connection connection
     :channel channel
     :config config})

然后发布：

(defn publish!
  [rabbit message]
  (lbasic/publish
   (:channel rabbit)
   (:exchange rabbit)
   (:routing-key rabbit)
   (json/generate-string message)
   {:content-type "text/plain"
    :peristent true}))

谢谢你！