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283eb0419c
Mainly removes the custom app.util.time namespace from frontend and backend and normalize all to use the app.common.time namespace
47 lines
1.2 KiB
Clojure
47 lines
1.2 KiB
Clojure
;; This Source Code Form is subject to the terms of the Mozilla Public
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;; License, v. 2.0. If a copy of the MPL was not distributed with this
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;; file, You can obtain one at http://mozilla.org/MPL/2.0/.
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;;
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;; Copyright (c) KALEIDOS INC
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(ns app.util.cache
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(:require
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[app.common.time :as ct]
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[beicon.v2.core :as rx]))
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(defonce cache (atom {}))
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(defonce pending (atom {}))
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(defn with-cache
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[{:keys [key max-age]} observable]
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(let [entry (get @cache key)
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pending-entry (get @pending key)
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age (when entry
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(ct/diff-ms (:created-at entry) (ct/now)))]
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(cond
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(and (some? entry) (< age max-age))
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(rx/of (:data entry))
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(some? pending-entry)
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pending-entry
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:else
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(let [subject (rx/subject)]
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(do
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(swap! pending assoc key subject)
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(rx/subscribe
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observable
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(fn [data]
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(let [entry {:created-at (ct/now) :data data}]
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(swap! cache assoc key entry))
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(swap! pending dissoc key)
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(rx/push! subject data)
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(rx/end! subject))
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#(do
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(swap! pending dissoc key)
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(rx/error! subject %))))
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subject))))
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