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(ns bootcamp.factorial)

(defn fast-factorial [number]
  (loop [n number factorial 1]
    (if (zero? n)
      factorial
      (recur (- n 1) (* factorial n)))))

(defn fast-no-loop-factorial
  ([number] (fast-no-loop-factorial number 1))

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worker_processes  1;
error_log logs/error.log;
events {
    worker_connections 1024;
}
http {
  init_worker_by_lua_block {
    redis = require("resty.redis")
  }
  server {

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starting multiple kafka consumer threads

• Example below is based on gregor, but it could use other Kafka bindings.
• Long CamelCased things come from Java
• defstate comes from mount

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separate namespace for routes:

(ns hubble.routes
  (:require [reitit..]))

(defn make-routes [config]
  [["/api/hubble" {:swagger {:tags ["ops"]}}
    ;; ....

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public class Calculator {

    public interface Operation {
        public Long perform( Long a, Long b );
    }

    // example of anonymous class(es)
    public static Operation add = new Operation() { public Long perform( Long a, Long b ) { return a + b; } };
    public static Operation subtract = new Operation() { public Long perform( Long a, Long b ) { return a - b; } };
    public static Operation divide = new Operation() { public Long perform( Long a, Long b ) { return a / b; } };

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import redis

r = redis.StrictRedis(host='localhost', port=6379, db=0)

r.zadd('votes:east',        **{'riak': 1,      'couchdb': 1,   'cassandra': 1})
r.zadd('votes:north',       **{'redis': 1,     'onetick': 1,   'couchdb': 1})
r.zadd('votes:west',        **{'redis': 1,     'riak': 1,      'couchdb': 1})
r.zadd('votes:south',       **{'voltdb': 1,    'mongodb': 1,   'hazelcast': 1})
r.zadd('votes:north:east',  **{'hazelcast': 1, 'riak': 1,      'redis': 1})
r.zadd('votes:north:west',  **{'redis': 1,     'cassandra': 1, 'onetick': 1})

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several facts "at once"

=> (crux/submit-tx node [[:crux.tx/put {:crux.db/id :legend/picasso :kind :human}]
                         [:crux.tx/put {:crux.db/id :legend/picasso :planet :earth}]
                         [:crux.tx/put {:crux.db/id :legend/picasso :alive? :always}]
                         [:crux.tx/put {:crux.db/id :legend/picasso :location "Barcelona"}]])

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;; inspired by suggestion in THE doc: http://java.ociweb.com/mark/clojure/article.html

(ns bootcamp.multi-method)

(defn measure-it [size]
  (cond
    (< size 3) :small
    (< size 6) :medium
    (< size 12) :large
    :else :hard-to-measure ))

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(require '[jsonista.core :as json]
         '[org.httpkit.client :as http]
         '[buddy.core.keys :as keys]
         '[buddy.sign.jwt :as jwt])

(def mapper (json/object-mapper {:decode-key-fn keyword}))

;; if done fo real => check for http/get error
(defn jwks->pubkey [jwks-url]
  (-> @(http/get jwks-url)

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expects

• kafka installed
• zookeeper hostname
• jq installed