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core.clj
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core.clj
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;; Copyright 2015, Yahoo Inc.
;; Licensed under the terms of the Apache License 2.0. Please see LICENSE file in the project root for terms.
(ns setup.core
(:import java.util.UUID)
(:import java.io.FileNotFoundException)
(:require [clj-kafka.new.producer :refer :all]
[redis.core :as redis]
[clojure.java.io :as io]
[clj-json.core :as json]
[clojure.tools.cli :as cli]
[clj-yaml.core :as yaml])
(:gen-class))
(def num-campaigns 100)
(def view-capacity-per-window 10)
(def kafka-event-count (* 10 1000000)) ; N millions
(def time-divisor 10000) ; 10 seconds
(defn make-ids [n]
(for [n (range n)]
(.toString (java.util.UUID/randomUUID))))
(defn write-ids [campaigns ads]
(println "Writing ids to files.")
;; Write the ids out to files
(with-open [campaign-o (clojure.java.io/writer "campaign-ids.txt")
ads-o (clojure.java.io/writer "ad-ids.txt")]
(binding [*out* campaign-o]
(doseq [campaign campaigns]
(println campaign)))
(binding [*out* ads-o]
(doseq [ad ads]
(println ad)))))
(defn load-ids []
(try
(with-open [campaigns (clojure.java.io/reader "campaign-ids.txt")
ads (clojure.java.io/reader "ad-ids.txt")]
(println "Loading Ids.")
{:campaigns (doall (line-seq campaigns))
:ads (doall (line-seq ads))}
(println "loading done"))
(catch FileNotFoundException e
(println "Failed to load ids from file."))))
(defn write-to-redis [campaigns ads redis-host]
;; Hook up the redis DB
(println "Writing initial data to Redis.")
(with-open [ad-to-campaign-o (clojure.java.io/writer "ad-to-campaign-ids.txt")]
(binding [*out* ad-to-campaign-o]
(let [campaigns-ads (map vector campaigns (partition 10 ads))]
(redis/with-server {:host redis-host}
(redis/flushall)
(doseq [[campaign campaign-ads] campaigns-ads]
(redis/sadd "campaigns" campaign)
(doseq [ad campaign-ads]
(println (str "{ \""ad "\": \"" campaign "\"}"))
(redis/set ad campaign))))))))
(defn write-to-kafka [ads kafka-hosts]
;; Put some crap in Kafka
(println "Setting up kafka topic.")
(with-open [p (producer {"bootstrap.servers" kafka-hosts}
(byte-array-serializer)
(byte-array-serializer))]
(println "Creating kafka senders.")
(let [ad-types ["banner", "modal", "sponsored-search", "mail", "mobile"]
event-types ["view", "click", "purchase"]
start-time (System/currentTimeMillis)
skew 0 ;(- (rand-int 1000))
late-by (- (if nil ;(= 0 (rand-int 1000))
(rand-int 50000)
0))]
; kafka-senders
(with-open [kafka-o (clojure.java.io/writer "kafka-json.txt")]
(doseq [v (partition 100000 (map vector
(range kafka-event-count)
(make-ids kafka-event-count)
(make-ids kafka-event-count)))]
(reduce
(fn [acc sender]
(if (= (mod acc 10000) 0)
(println acc))
@sender
(+ 1 acc))
0
(doall
(for [[n user_id page_id] v]
(let [json-str (str "{\"user_id\": \"" user_id
"\", \"page_id\": \"" page_id
"\", \"ad_id\": \"" (rand-nth ads)
"\", \"ad_type\": \"" (rand-nth ad-types)
"\", \"event_type\": \"" (rand-nth event-types)
"\", \"event_time\": \"" (str (+ start-time (* n 10) skew late-by))
"\", \"ip_address\": \"1.2.3.4\"}")]
(.write kafka-o (str json-str "\n"))
(send p (record "ad-events" (.getBytes json-str))))))))))))
;; Returns a map campaign-id->(timestamp->count)
(defn dostats []
(println "Getting Stats!")
(let [json-string-mapper (map json/parse-string)
ad->campaign (with-open [ad-campaign (io/reader "ad-to-campaign-ids.txt")]
(doall
(reduce merge (map json/parse-string (line-seq ad-campaign)))))
campaign-buckets-mapper (map (fn camp-buck-map [event]
(let [event-time (Long. (get event "event_time"))
time-bucket (long (/ event-time time-divisor))
ad-id (get event "ad_id")
type (get event "event_type")
campaign-id (get ad->campaign ad-id)]
[campaign-id time-bucket type])))]
(with-open [kafkas (io/reader "kafka-json.txt")]
(transduce (comp json-string-mapper campaign-buckets-mapper)
(fn transduc
([one] one)
([acc [campaign-id time-bucket type]]
(let [current-campaign-map (get acc campaign-id)
current-timebucket-val (or (get current-campaign-map time-bucket) 0)
next-timebucket-val (+ current-timebucket-val 1)]
(if (= type "view")
(assoc acc campaign-id
(assoc current-campaign-map time-bucket
next-timebucket-val))
acc))))
{}
(line-seq kafkas)))))
(defn get-stats [redis-host]
(with-open [seen-file (clojure.java.io/writer "seen.txt")
updated-file (clojure.java.io/writer "updated.txt")]
(letfn [(data-printer [[seen updated]]
(.write seen-file (str seen "\n"))
(.write updated-file (str updated "\n")))]
(redis/with-server {:host redis-host}
(doall
(map data-printer
(apply concat
(let [campaigns (redis/smembers "campaigns")]
(for [campaign campaigns]
(let [windows-key (redis/hget campaign "windows")
window-count (redis/llen windows-key)
windows (redis/lrange windows-key 0 window-count)]
(for [window-time windows]
(let [window-key (redis/hget campaign window-time)
seen (redis/hget window-key "seen_count")
time_updated (redis/hget window-key "time_updated")]
[seen (- (Long/parseLong time_updated) (Long/parseLong window-time))]))))))))))))
(defn gen-ads [redis-host]
(redis/with-server {:host redis-host}
(let [campaigns (redis/smembers "campaigns")
ads (into [] (make-ids (* num-campaigns 10)))
campaigns-ads (map vector campaigns (partition 10 ads))]
(if (< (count campaigns) num-campaigns)
(throw (RuntimeException. "No Campaigns found. Please run with -n first.")))
(doseq [[campaign campaign-ads] campaigns-ads]
(doseq [ad campaign-ads]
(redis/set ad campaign)))
ads)))
(defn make-kafka-event-at [time with-skew? ads user-ids page-ids]
(let [ad-types ["banner", "modal", "sponsored-search", "mail", "mobile"]
event-types ["view", "click", "purchase"]
skew (if with-skew?
(- 50 (rand-int 100))
0)
late-by (if with-skew?
(- (if (= 0 (rand-int 100000))
(rand-int 60000)
0))
0)
time (+ time skew late-by)]
(str "{\"user_id\": \"" (rand-nth user-ids)
"\", \"page_id\": \"" (rand-nth page-ids)
"\", \"ad_id\": \"" (rand-nth ads)
"\", \"ad_type\": \"" (rand-nth ad-types)
"\", \"event_type\": \"" (rand-nth event-types)
"\", \"event_time\": \"" (str time)
"\", \"ip_address\": \"1.2.3.4\"}")))
(defn run [throughput with-skew? kafka-hosts redis-host]
(println "Running, emitting" throughput "tuples per second.")
(let [ads (gen-ads redis-host)
page-ids (make-ids 100)
user-ids (make-ids 100)
start-time-ns (* 1000000 (System/currentTimeMillis))
period-ns (long (/ 1000000000 throughput))
times (map #(+ (* period-ns %) start-time-ns) (range))]
(with-open [p (producer {"bootstrap.servers" kafka-hosts}
(byte-array-serializer)
(byte-array-serializer))]
(doseq [t times]
(let [cur (System/currentTimeMillis)
t (long (/ t 1000000))]
(if (> t cur)
(Thread/sleep (- t cur))
(future
(if (> cur (+ t 100))
(println "Falling behind by:" (- cur t) "ms"))))
(send p (record "ad-events"
(.getBytes (make-kafka-event-at t with-skew? ads user-ids page-ids)))))))))
(defn do-new-setup [redis-host]
;; Hook up the redis DB
(println "Writing campaigns data to Redis.")
(let [campaigns (make-ids num-campaigns)]
(redis/with-server {:host redis-host}
(redis/flushall)
(doseq [campaign campaigns]
(redis/sadd "campaigns" campaign)))))
(defn check-correct [redis-host]
(let [stats (doall (dostats))]
(println "Got stats!")
(println "Checking Redis!")
(redis/with-server {:host redis-host}
(doseq [[campaign c-stats] stats]
(doseq [[timestamp val] c-stats]
(let [timestamp-key (redis/hget campaign (str (* timestamp time-divisor)))]
(if timestamp-key
(let [seen-count (Long. (redis/hget timestamp-key "seen_count"))]
(if (not= seen-count val) ;when
(println (str
"Campaign: " (pr-str campaign)
" has an entry for Timestamp: " (pr-str timestamp)
" DIFFER in seen count: (" (pr-str seen-count) ", " (pr-str val) ")"))
(println (str
"Campaign: " (pr-str campaign)
" has an entry for Timestamp: " (pr-str timestamp)
" CORRECT in seen count: (" (pr-str seen-count) ", " (pr-str val) ")"))
))
(println (str
"Campaign: " (pr-str campaign)
" has no entry for Timestamp: " (str timestamp ) " , was expecting " (pr-str val))))))))))
(defn do-setup [conf]
(let [{campaigns :campaigns ads :ads} (load-ids)]
(if (or (nil? campaigns) (nil? ads))
;; Create new ids
(let [campaigns (make-ids num-campaigns)
ads (into [] (make-ids (* num-campaigns 10)))]
(write-to-redis campaigns ads (conf :redis-host))
(write-to-kafka ads (conf :kakfa-brokers))
(write-ids campaigns ads))
(write-to-redis campaigns ads))))
(defn get-conf [confPath]
(let [conf (yaml/parse-string (slurp confPath))
redis-host (get conf :redis.host)
kafka-port (get conf :kafka.port)
kafka-hosts (clojure.string/join (interpose "," (for [broker (get conf :kafka.brokers)]
(str broker ":" kafka-port))))]
(println {:redis-host redis-host :kakfa-brokers kafka-hosts})
{:redis-host redis-host :kakfa-brokers kafka-hosts}))
(def cli-options
[["-s" "--setup" "Set up for catchup-simulation-mode (or re-setup if the .txt files exist)"]
["-c" "--check" "Check that the catchup-mode data has been properly processed by whatever is being benchmarked."]
["-n" "--new" "Set up redis for a new real-time simulation. This must be run on only one node, only once before starting multiple kafka-feeders (-r) on multiple nodes."]
["-r" "--run" "Run - emit events to kafka at a particular frequency This is used for the real-time simulation. Frequency specified with other options."]
["-t" "--throughput COUNT" "Should be used with '-r'. This is the number of tuples per second to emit. (Obviously it can't emit ridiculous numbers per second.)"
:default 0
:parse-fn #(Long/parseLong %)]
["-w" "--with-skew" "Add minor skew and late tuples into the mix."]
["-g" "--get-stats" "Read through redis and collect stats on end-to-end latency and so forth for the real-time simulation."]
["-a" "--configPath PATH" "Path to config yaml file"
:default "./benchmarkConf.yaml"
:parse-fn #(String/valueOf %)]])
(defn -main
[& args]
(let [{:keys [options arguments errors summary]} (cli/parse-opts args cli-options)
conf (get-conf (:configPath options))
kafka-hosts (get conf :kakfa-brokers)
redis-host (get conf :redis-host)]
(cond
(and (:setup options) (:check options)) (println "Specify either --setup OR --check")
(:setup options) (do-setup conf)
(:check options) (check-correct redis-host)
(:new options) (do-new-setup redis-host)
(:run options) (run (:throughput options) (:with-skew options) kafka-hosts redis-host)
(:get-stats options) (get-stats redis-host)
:else (println summary))))