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queue.clj
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/
queue.clj
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(ns goose.brokers.rmq.queue
(:refer-clojure :exclude [declare])
(:require
[goose.defaults :as d]
[langohr.exchange :as lex]
[langohr.queue :as lq]))
(def classic
{:type d/rmq-classic-queue})
(def quorum
{:type d/rmq-quorum-queue
:replication-factor d/rmq-replication-factor})
(defn- arguments
[{:keys [type replication-factor]}]
(condp = type
d/rmq-classic-queue
{"x-queue-type" d/rmq-classic-queue
"x-max-priority" d/rmq-high-priority}
d/rmq-quorum-queue
{"x-queue-type" d/rmq-quorum-queue
"x-quorum-initial-group-size" replication-factor}))
(def ^:private declared-queues (atom #{}))
(defn clear-cache [] (reset! declared-queues #{}))
(defn ^:no-doc declare
[ch {:keys [queue] :as queue-opts}]
(when-not (@declared-queues queue)
(lex/declare ch
d/rmq-delay-exchange
d/rmq-delay-exchange-type
{:durable true
:auto-delete false
:arguments {"x-delayed-type" "direct"}})
(let [arguments (arguments queue-opts)]
(lq/declare ch
queue
{:durable true
:auto-delete false
:exclusive false
:arguments arguments}))
(lq/bind ch queue d/rmq-delay-exchange {:routing-key queue})
(swap! declared-queues conj queue)))