mirror of
https://github.com/penpot/penpot.git
synced 2025-08-01 04:48:21 +02:00
509 lines
15 KiB
Clojure
509 lines
15 KiB
Clojure
;; This Source Code Form is subject to the terms of the Mozilla Public
|
|
;; License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
;; file, You can obtain one at http://mozilla.org/MPL/2.0/.
|
|
;;
|
|
;; Copyright (c) UXBOX Labs SL
|
|
|
|
(ns app.worker
|
|
"Async tasks abstraction (impl)."
|
|
(:require
|
|
[app.common.data :as d]
|
|
[app.common.exceptions :as ex]
|
|
[app.common.spec :as us]
|
|
[app.common.uuid :as uuid]
|
|
[app.db :as db]
|
|
[app.metrics :as mtx]
|
|
[app.util.async :as aa]
|
|
[app.util.logging :as l]
|
|
[app.util.time :as dt]
|
|
[clojure.core.async :as a]
|
|
[clojure.spec.alpha :as s]
|
|
[cuerdas.core :as str]
|
|
[integrant.core :as ig]
|
|
[promesa.exec :as px])
|
|
(:import
|
|
org.eclipse.jetty.util.thread.QueuedThreadPool
|
|
java.util.concurrent.ExecutorService
|
|
java.util.concurrent.Executors
|
|
java.util.concurrent.Executor))
|
|
|
|
(s/def ::executor #(instance? Executor %))
|
|
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
;; Executor
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
|
|
(s/def ::name keyword?)
|
|
(s/def ::min-threads ::us/integer)
|
|
(s/def ::max-threads ::us/integer)
|
|
(s/def ::idle-timeout ::us/integer)
|
|
|
|
(defmethod ig/pre-init-spec ::executor [_]
|
|
(s/keys :req-un [::min-threads ::max-threads ::idle-timeout ::name]))
|
|
|
|
(defmethod ig/init-key ::executor
|
|
[_ {:keys [min-threads max-threads idle-timeout name]}]
|
|
(doto (QueuedThreadPool. (int max-threads)
|
|
(int min-threads)
|
|
(int idle-timeout))
|
|
(.setStopTimeout 500)
|
|
(.setName (d/name name))
|
|
(.start)))
|
|
|
|
(defmethod ig/halt-key! ::executor
|
|
[_ instance]
|
|
(.stop ^QueuedThreadPool instance))
|
|
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
;; Worker
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
|
|
(declare event-loop-fn)
|
|
(declare instrument-tasks)
|
|
|
|
(s/def ::queue keyword?)
|
|
(s/def ::parallelism ::us/integer)
|
|
(s/def ::batch-size ::us/integer)
|
|
(s/def ::tasks (s/map-of keyword? fn?))
|
|
(s/def ::poll-interval ::dt/duration)
|
|
|
|
(defmethod ig/pre-init-spec ::worker [_]
|
|
(s/keys :req-un [::executor
|
|
::mtx/metrics
|
|
::db/pool
|
|
::batch-size
|
|
::name
|
|
::poll-interval
|
|
::queue
|
|
::tasks]))
|
|
|
|
(defmethod ig/prep-key ::worker
|
|
[_ cfg]
|
|
(d/merge {:batch-size 2
|
|
:name :worker
|
|
:poll-interval (dt/duration {:seconds 5})
|
|
:queue :default}
|
|
(d/without-nils cfg)))
|
|
|
|
(defmethod ig/init-key ::worker
|
|
[_ {:keys [pool poll-interval name queue] :as cfg}]
|
|
(l/info :action "start worker"
|
|
:name (d/name name)
|
|
:queue (d/name queue))
|
|
(let [close-ch (a/chan 1)
|
|
poll-ms (inst-ms poll-interval)]
|
|
(a/go-loop []
|
|
(let [[val port] (a/alts! [close-ch (event-loop-fn cfg)] :priority true)]
|
|
(cond
|
|
;; Terminate the loop if close channel is closed or
|
|
;; event-loop-fn returns nil.
|
|
(or (= port close-ch) (nil? val))
|
|
(l/debug :msg "stop condition found")
|
|
|
|
(db/pool-closed? pool)
|
|
(do
|
|
(l/debug :msg "eventloop aborted because pool is closed")
|
|
(a/close! close-ch))
|
|
|
|
(and (instance? java.sql.SQLException val)
|
|
(contains? #{"08003" "08006" "08001" "08004"} (.getSQLState ^java.sql.SQLException val)))
|
|
(do
|
|
(l/error :hint "connection error, trying resume in some instants")
|
|
(a/<! (a/timeout poll-interval))
|
|
(recur))
|
|
|
|
(and (instance? java.sql.SQLException val)
|
|
(= "40001" (.getSQLState ^java.sql.SQLException val)))
|
|
(do
|
|
(l/debug :msg "serialization failure (retrying in some instants)")
|
|
(a/<! (a/timeout poll-ms))
|
|
(recur))
|
|
|
|
(instance? Exception val)
|
|
(do
|
|
(l/error :cause val
|
|
:hint "unexpected error ocurried on polling the database (will resume in some instants)")
|
|
(a/<! (a/timeout poll-ms))
|
|
(recur))
|
|
|
|
(= ::handled val)
|
|
(recur)
|
|
|
|
(= ::empty val)
|
|
(do
|
|
(a/<! (a/timeout poll-ms))
|
|
(recur)))))
|
|
|
|
(reify
|
|
java.lang.AutoCloseable
|
|
(close [_]
|
|
(a/close! close-ch)))))
|
|
|
|
|
|
(defmethod ig/halt-key! ::worker
|
|
[_ instance]
|
|
(.close ^java.lang.AutoCloseable instance))
|
|
|
|
;; --- SUBMIT
|
|
|
|
(s/def ::task keyword?)
|
|
(s/def ::delay (s/or :int ::us/integer :duration dt/duration?))
|
|
(s/def ::conn some?)
|
|
(s/def ::priority ::us/integer)
|
|
(s/def ::max-retries ::us/integer)
|
|
|
|
(s/def ::submit-options
|
|
(s/keys :req [::task ::conn]
|
|
:opt [::delay ::queue ::priority ::max-retries]))
|
|
|
|
(def ^:private sql:insert-new-task
|
|
"insert into task (id, name, props, queue, priority, max_retries, scheduled_at)
|
|
values (?, ?, ?, ?, ?, ?, clock_timestamp() + ?)
|
|
returning id")
|
|
|
|
(defn- extract-props
|
|
[options]
|
|
(persistent!
|
|
(reduce-kv (fn [res k v]
|
|
(cond-> res
|
|
(not (qualified-keyword? k))
|
|
(assoc! k v)))
|
|
(transient {})
|
|
options)))
|
|
|
|
(defn submit!
|
|
[{:keys [::task ::delay ::queue ::priority ::max-retries ::conn]
|
|
:or {delay 0 queue :default priority 100 max-retries 3}
|
|
:as options}]
|
|
(us/verify ::submit-options options)
|
|
(let [duration (dt/duration delay)
|
|
interval (db/interval duration)
|
|
props (-> options extract-props db/tjson)
|
|
id (uuid/next)]
|
|
(l/debug :action "submit task"
|
|
:name (d/name task)
|
|
:in duration)
|
|
(db/exec-one! conn [sql:insert-new-task id (d/name task) props (d/name queue) priority max-retries interval])
|
|
id))
|
|
|
|
|
|
;; --- RUNNER
|
|
|
|
(def ^:private
|
|
sql:mark-as-retry
|
|
"update task
|
|
set scheduled_at = clock_timestamp() + ?::interval,
|
|
modified_at = clock_timestamp(),
|
|
error = ?,
|
|
status = 'retry',
|
|
retry_num = retry_num + ?
|
|
where id = ?")
|
|
|
|
(def default-delay
|
|
(dt/duration {:seconds 10}))
|
|
|
|
(defn- mark-as-retry
|
|
[conn {:keys [task error inc-by delay]
|
|
:or {inc-by 1 delay default-delay}}]
|
|
(let [explain (ex-message error)
|
|
delay (db/interval delay)
|
|
sqlv [sql:mark-as-retry delay explain inc-by (:id task)]]
|
|
(db/exec-one! conn sqlv)
|
|
nil))
|
|
|
|
(defn- mark-as-failed
|
|
[conn {:keys [task error]}]
|
|
(let [explain (ex-message error)]
|
|
(db/update! conn :task
|
|
{:error explain
|
|
:modified-at (dt/now)
|
|
:status "failed"}
|
|
{:id (:id task)})
|
|
nil))
|
|
|
|
(defn- mark-as-completed
|
|
[conn {:keys [task] :as cfg}]
|
|
(let [now (dt/now)]
|
|
(db/update! conn :task
|
|
{:completed-at now
|
|
:modified-at now
|
|
:status "completed"}
|
|
{:id (:id task)})
|
|
nil))
|
|
|
|
(defn- decode-task-row
|
|
[{:keys [props name] :as row}]
|
|
(when row
|
|
(cond-> row
|
|
(db/pgobject? props) (assoc :props (db/decode-transit-pgobject props))
|
|
(string? name) (assoc :name (keyword name)))))
|
|
|
|
(defn- handle-task
|
|
[tasks {:keys [name] :as item}]
|
|
(let [task-fn (get tasks name)]
|
|
(if task-fn
|
|
(task-fn item)
|
|
(l/warn :msg "no task handler found"
|
|
:name (d/name name)))
|
|
{:status :completed :task item}))
|
|
|
|
(defn get-error-context
|
|
[error item]
|
|
(let [edata (ex-data error)]
|
|
{:id (uuid/next)
|
|
:data edata
|
|
:params item}))
|
|
|
|
(defn- handle-exception
|
|
[error item]
|
|
(let [edata (ex-data error)]
|
|
(if (and (< (:retry-num item)
|
|
(:max-retries item))
|
|
(= ::retry (:type edata)))
|
|
(cond-> {:status :retry :task item :error error}
|
|
(dt/duration? (:delay edata))
|
|
(assoc :delay (:delay edata))
|
|
|
|
(= ::noop (:strategy edata))
|
|
(assoc :inc-by 0))
|
|
|
|
(let [cdata (get-error-context error item)]
|
|
(l/update-thread-context! cdata)
|
|
(l/error :cause error
|
|
:hint "unhandled exception on task"
|
|
:id (:id cdata))
|
|
|
|
(if (>= (:retry-num item) (:max-retries item))
|
|
{:status :failed :task item :error error}
|
|
{:status :retry :task item :error error})))))
|
|
|
|
(defn- run-task
|
|
[{:keys [tasks]} item]
|
|
(let [name (d/name (:name item))]
|
|
(try
|
|
(l/debug :action "start task"
|
|
:name name
|
|
:id (:id item)
|
|
:retry (:retry-num item))
|
|
|
|
(handle-task tasks item)
|
|
(catch Exception e
|
|
(handle-exception e item))
|
|
(finally
|
|
(l/debug :action "end task"
|
|
:name name
|
|
:id (:id item)
|
|
:retry (:retry-num item))))))
|
|
|
|
(def sql:select-next-tasks
|
|
"select * from task as t
|
|
where t.scheduled_at <= now()
|
|
and t.queue = ?
|
|
and (t.status = 'new' or t.status = 'retry')
|
|
order by t.priority desc, t.scheduled_at
|
|
limit ?
|
|
for update skip locked")
|
|
|
|
(defn- event-loop-fn*
|
|
[{:keys [pool executor batch-size] :as cfg}]
|
|
(db/with-atomic [conn pool]
|
|
(let [queue (name (:queue cfg))
|
|
items (->> (db/exec! conn [sql:select-next-tasks queue batch-size])
|
|
(map decode-task-row)
|
|
(seq))
|
|
cfg (assoc cfg :conn conn)]
|
|
|
|
(if (nil? items)
|
|
::empty
|
|
(let [proc-xf (comp (map #(partial run-task cfg %))
|
|
(map #(px/submit! executor %)))]
|
|
(->> (into [] proc-xf items)
|
|
(map deref)
|
|
(run! (fn [res]
|
|
(case (:status res)
|
|
:retry (mark-as-retry conn res)
|
|
:failed (mark-as-failed conn res)
|
|
:completed (mark-as-completed conn res)))))
|
|
::handled)))))
|
|
|
|
(defn- event-loop-fn
|
|
[{:keys [executor] :as cfg}]
|
|
(aa/thread-call executor #(event-loop-fn* cfg)))
|
|
|
|
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
;; Scheduler
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
|
|
(declare schedule-task)
|
|
(declare synchronize-schedule)
|
|
|
|
(s/def ::fn (s/or :var var? :fn fn?))
|
|
(s/def ::id keyword?)
|
|
(s/def ::cron dt/cron?)
|
|
(s/def ::props (s/nilable map?))
|
|
(s/def ::task keyword?)
|
|
|
|
(s/def ::scheduled-task
|
|
(s/keys :req-un [::cron ::task]
|
|
:opt-un [::props ::id]))
|
|
|
|
(s/def ::schedule (s/coll-of (s/nilable ::scheduled-task)))
|
|
|
|
(defmethod ig/pre-init-spec ::scheduler [_]
|
|
(s/keys :req-un [::executor ::db/pool ::schedule ::tasks]))
|
|
|
|
(defmethod ig/init-key ::scheduler
|
|
[_ {:keys [schedule tasks] :as cfg}]
|
|
(let [scheduler (Executors/newScheduledThreadPool (int 1))
|
|
schedule (->> schedule
|
|
(filter some?)
|
|
;; If id is not defined, use the task as id.
|
|
(map (fn [{:keys [id task] :as item}]
|
|
(if (some? id)
|
|
(assoc item :id (d/name id))
|
|
(assoc item :id (d/name task)))))
|
|
(map (fn [{:keys [task] :as item}]
|
|
(let [f (get tasks task)]
|
|
(when-not f
|
|
(ex/raise :type :internal
|
|
:code :task-not-found
|
|
:hint (str/fmt "task %s not configured" task)))
|
|
(-> item
|
|
(dissoc :task)
|
|
(assoc :fn f))))))
|
|
cfg (assoc cfg
|
|
:scheduler scheduler
|
|
:schedule schedule)]
|
|
|
|
(synchronize-schedule cfg)
|
|
(run! (partial schedule-task cfg)
|
|
(filter some? schedule))
|
|
|
|
(reify
|
|
java.lang.AutoCloseable
|
|
(close [_]
|
|
(.shutdownNow ^ExecutorService scheduler)))))
|
|
|
|
(defmethod ig/halt-key! ::scheduler
|
|
[_ instance]
|
|
(.close ^java.lang.AutoCloseable instance))
|
|
|
|
(def sql:upsert-scheduled-task
|
|
"insert into scheduled_task (id, cron_expr)
|
|
values (?, ?)
|
|
on conflict (id)
|
|
do update set cron_expr=?")
|
|
|
|
(defn- synchronize-schedule-item
|
|
[conn {:keys [id cron]}]
|
|
(let [cron (str cron)]
|
|
(l/debug :action "initialize scheduled task" :id id :cron cron)
|
|
(db/exec-one! conn [sql:upsert-scheduled-task id cron cron])))
|
|
|
|
(defn- synchronize-schedule
|
|
[{:keys [pool schedule]}]
|
|
(db/with-atomic [conn pool]
|
|
(run! (partial synchronize-schedule-item conn) schedule)))
|
|
|
|
(def sql:lock-scheduled-task
|
|
"select id from scheduled_task where id=? for update skip locked")
|
|
|
|
(defn exception->string
|
|
[error]
|
|
(with-out-str
|
|
(.printStackTrace ^Throwable error (java.io.PrintWriter. *out*))))
|
|
|
|
(defn- execute-scheduled-task
|
|
[{:keys [executor pool] :as cfg} {:keys [id] :as task}]
|
|
(letfn [(run-task [conn]
|
|
(try
|
|
(when (db/exec-one! conn [sql:lock-scheduled-task (d/name id)])
|
|
(l/debug :action "execute scheduled task" :id id)
|
|
((:fn task) task))
|
|
(catch Throwable e
|
|
e)))
|
|
|
|
(handle-task []
|
|
(db/with-atomic [conn pool]
|
|
(let [result (run-task conn)]
|
|
(when (ex/exception? result)
|
|
(l/error :cause result
|
|
:hint "unhandled exception on scheduled task"
|
|
:id id)))))]
|
|
|
|
(try
|
|
(px/run! executor handle-task)
|
|
(finally
|
|
(schedule-task cfg task)))))
|
|
|
|
(defn- ms-until-valid
|
|
[cron]
|
|
(s/assert dt/cron? cron)
|
|
(let [now (dt/now)
|
|
next (dt/next-valid-instant-from cron now)]
|
|
(inst-ms (dt/duration-between now next))))
|
|
|
|
(defn- schedule-task
|
|
[{:keys [scheduler] :as cfg} {:keys [cron] :as task}]
|
|
(let [ms (ms-until-valid cron)]
|
|
(px/schedule! scheduler ms (partial execute-scheduled-task cfg task))))
|
|
|
|
;; --- INSTRUMENTATION
|
|
|
|
(defn instrument!
|
|
[registry]
|
|
(mtx/instrument-vars!
|
|
[#'submit!]
|
|
{:registry registry
|
|
:type :counter
|
|
:labels ["name"]
|
|
:name "tasks_submit_total"
|
|
:help "A counter of task submissions."
|
|
:wrap (fn [rootf mobj]
|
|
(let [mdata (meta rootf)
|
|
origf (::original mdata rootf)]
|
|
(with-meta
|
|
(fn [conn params]
|
|
(let [tname (:name params)]
|
|
(mobj :inc [tname])
|
|
(origf conn params)))
|
|
{::original origf})))})
|
|
|
|
(mtx/instrument-vars!
|
|
[#'app.worker/run-task]
|
|
{:registry registry
|
|
:type :summary
|
|
:quantiles []
|
|
:name "tasks_checkout_timing"
|
|
:help "Latency measured between scheduld_at and execution time."
|
|
:wrap (fn [rootf mobj]
|
|
(let [mdata (meta rootf)
|
|
origf (::original mdata rootf)]
|
|
(with-meta
|
|
(fn [tasks item]
|
|
(let [now (inst-ms (dt/now))
|
|
sat (inst-ms (:scheduled-at item))]
|
|
(mobj :observe (- now sat))
|
|
(origf tasks item)))
|
|
{::original origf})))}))
|
|
|
|
|
|
(defmethod ig/pre-init-spec ::registry [_]
|
|
(s/keys :req-un [::mtx/metrics ::tasks]))
|
|
|
|
(defmethod ig/init-key ::registry
|
|
[_ {:keys [metrics tasks]}]
|
|
(let [mobj (mtx/create
|
|
{:registry (:registry metrics)
|
|
:type :summary
|
|
:labels ["name"]
|
|
:quantiles []
|
|
:name "tasks_timing"
|
|
:help "Background task execution timing."})]
|
|
(reduce-kv (fn [res k v]
|
|
(let [tname (name k)]
|
|
(l/debug :action "register task" :name tname)
|
|
(assoc res k (mtx/wrap-summary v mobj [tname]))))
|
|
{}
|
|
tasks)))
|