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50 lines
1.5 KiB
Clojure
50 lines
1.5 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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;; This Source Code Form is "Incompatible With Secondary Licenses", as
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;; defined by the Mozilla Public License, v. 2.0.
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;;
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;; Copyright (c) 2020 UXBOX Labs SL
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(ns app.tasks.file-xlog-gc
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"A maintenance task that performs a garbage collection of the file
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change (transaction) log."
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(:require
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[app.db :as db]
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[app.metrics :as mtx]
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[app.util.time :as dt]
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[clojure.spec.alpha :as s]
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[clojure.tools.logging :as log]
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[integrant.core :as ig]))
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(declare handler)
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(s/def ::max-age ::dt/duration)
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(defmethod ig/pre-init-spec ::handler [_]
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(s/keys :req-un [::db/pool ::mtx/metrics ::max-age]))
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(defmethod ig/init-key ::handler
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[_ {:keys [metrics] :as cfg}]
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(let [handler #(handler cfg %)]
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(->> {:registry (:registry metrics)
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:type :summary
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:name "task_file_xlog_gc_timing"
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:help "file changes garbage collection task timing"}
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(mtx/instrument handler))))
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(def ^:private
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sql:delete-files-xlog
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"delete from file_change
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where created_at < now() - ?::interval")
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(defn- handler
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[{:keys [pool max-age]} _]
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(db/with-atomic [conn pool]
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(let [interval (db/interval max-age)
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result (db/exec-one! conn [sql:delete-files-xlog interval])
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result (:next.jdbc/update-count result)]
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(log/infof "removed %s rows from file_change table" result)
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nil)))
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