├── .gitignore ├── CHANGELOG.md ├── LICENSE ├── README.md ├── build.clj ├── deps.edn ├── doc └── intro.md ├── pom.xml ├── resources └── .keep ├── src └── janetacarr │ └── event_driven_architecture_example.clj └── test └── janetacarr └── event_driven_architecture_example_test.clj /.gitignore: -------------------------------------------------------------------------------- 1 | .calva/output-window/ 2 | .classpath 3 | .clj-kondo/.cache 4 | .cpcache 5 | .DS_Store 6 | .eastwood 7 | .factorypath 8 | .hg/ 9 | .hgignore 10 | .java-version 11 | .lein-* 12 | .lsp/.cache 13 | .lsp/sqlite.db 14 | .nrepl-history 15 | .nrepl-port 16 | .portal 17 | .project 18 | .rebel_readline_history 19 | .settings 20 | .socket-repl-port 21 | .sw* 22 | .vscode 23 | *.class 24 | *.jar 25 | *.swp 26 | *~ 27 | /checkouts 28 | /classes 29 | /target 30 | -------------------------------------------------------------------------------- /CHANGELOG.md: -------------------------------------------------------------------------------- 1 | # Change Log 2 | All notable changes to this project will be documented in this file. This change log follows the conventions of [keepachangelog.com](http://keepachangelog.com/). 3 | 4 | ## [Unreleased] 5 | ### Changed 6 | - Add a new arity to `make-widget-async` to provide a different widget shape. 7 | 8 | ## [0.1.1] - 2023-06-20 9 | ### Changed 10 | - Documentation on how to make the widgets. 11 | 12 | ### Removed 13 | - `make-widget-sync` - we're all async, all the time. 14 | 15 | ### Fixed 16 | - Fixed widget maker to keep working when daylight savings switches over. 17 | 18 | ## 0.1.0 - 2023-06-20 19 | ### Added 20 | - Files from the new template. 21 | - Widget maker public API - `make-widget-sync`. 22 | 23 | [Unreleased]: https://github.com/janetacarr/event-driven-architecture-example/compare/0.1.1...HEAD 24 | [0.1.1]: https://github.com/janetacarr/event-driven-architecture-example/compare/0.1.0...0.1.1 25 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | THE ACCOMPANYING PROGRAM IS PROVIDED UNDER THE TERMS OF THIS ECLIPSE PUBLIC 2 | LICENSE ("AGREEMENT"). 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Each party waives its rights to a jury trial 214 | in any resulting litigation. 215 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # event-driven-architecture-example 2 | 3 | Just an example of an event-driven architecture in Clojure using core.async to start with. 4 | 5 | ## License 6 | 7 | Copyright © 2023 Janet 8 | 9 | _EPLv1.0 is just the default for projects generated by `clj-new`: you are not_ 10 | _required to open source this project, nor are you required to use EPLv1.0!_ 11 | _Feel free to remove or change the `LICENSE` file and remove or update this_ 12 | _section of the `README.md` file!_ 13 | 14 | Distributed under the Eclipse Public License version 1.0. 15 | -------------------------------------------------------------------------------- /build.clj: -------------------------------------------------------------------------------- 1 | (ns build 2 | (:refer-clojure :exclude [test]) 3 | (:require [org.corfield.build :as bb])) 4 | 5 | (def lib 'net.clojars.janetacarr/event-driven-architecture-example) 6 | (def version "0.1.0-SNAPSHOT") 7 | (def main 'janetacarr.event-driven-architecture-example) 8 | 9 | (defn test "Run the tests." [opts] 10 | (bb/run-tests opts)) 11 | 12 | (defn ci "Run the CI pipeline of tests (and build the uberjar)." [opts] 13 | (-> opts 14 | (assoc :lib lib :version version :main main) 15 | (bb/run-tests) 16 | (bb/clean) 17 | (bb/uber))) 18 | -------------------------------------------------------------------------------- /deps.edn: -------------------------------------------------------------------------------- 1 | {:paths ["src" "resources"] 2 | :deps {org.clojure/clojure {:mvn/version "1.11.1"} 3 | org.clojure/clojurescript {:mvn/version "1.11.60"} 4 | org.clojure/core.async {:mvn/version "1.6.673"} 5 | metosin/reitit {:mvn/version "0.5.15"} 6 | metosin/reitit-schema {:mvn/version "0.5.15"} 7 | hiccup/hiccup {:mvn/version "2.0.0-alpha2"} 8 | selmer/selmer {:mvn/version "1.12.44"} 9 | ring/ring {:mvn/version "1.8.2"} 10 | ring/ring-json {:mvn/version "0.5.1"} 11 | ring-cors/ring-cors {:mvn/version "0.1.13"} 12 | ring-middleware-accept/ring-middleware-accept {:mvn/version "2.0.3"} 13 | camel-snake-kebab/camel-snake-kebab {:mvn/version "0.4.2"} 14 | environ/environ {:mvn/version "1.2.0"} 15 | danlentz/clj-uuid {:mvn/version "0.1.9"} 16 | com.github.seancorfield/next.jdbc {:mvn/version "1.2.737"} 17 | integrant/integrant {:mvn/version "0.8.0"} 18 | spootnik/signal {:mvn/version "0.2.4"} 19 | com.taoensso/timbre {:mvn/version "5.2.1"} 20 | ring-oauth2/ring-oauth2 {:mvn/version "0.2.0"} 21 | ring/ring-defaults {:mvn/version "0.3.3"} 22 | integrant/repl {:mvn/version "0.3.2"} 23 | org.postgresql/postgresql {:mvn/version "42.3.1"} 24 | com.cognitect/transit-clj {:mvn/version "1.0.329"} 25 | buddy/buddy-auth {:mvn/version "3.0.323"} 26 | buddy/buddy-sign {:mvn/version "3.4.333"} 27 | buddy/buddy-core {:mvn/version "1.10.413"} 28 | buddy/buddy-hashers {:mvn/version "1.8.158"} 29 | metosin/ring-http-response {:mvn/version "0.9.3"} 30 | cheshire/cheshire {:mvn/version "5.11.0"} 31 | compojure/compojure {:mvn/version "1.7.0"} 32 | clj-http/clj-http {:mvn/version "3.12.3" 33 | :exclusions [org.apache.logging.log4j/log4j-api 34 | org.apache.logging.log4j/log4j-core 35 | org.apache.logging.log4j/log4j-1.2-api]}} 36 | :aliases 37 | {:run-m {:main-opts ["-m" "janetacarr.event-driven-architecture-example"]} 38 | :run-x {:ns-default janetacarr.event-driven-architecture-example 39 | :exec-fn greet 40 | :exec-args {:name "Clojure"}} 41 | :dev {:extra-deps {cider/cider-nrepl {:mvn/version "0.26.0"} 42 | com.clojure-goes-fast/clj-java-decompiler {:mvn/version "0.3.1"}} 43 | :main-opts ["-m" "nrepl.cmdline" 44 | "--middleware" "[cider.nrepl/cider-middleware]"]} 45 | :build {:deps {io.github.seancorfield/build-clj 46 | {:git/tag "v0.8.2" :git/sha "0ffdb4c" 47 | ;; since we're building an app uberjar, we do not 48 | ;; need deps-deploy for clojars.org deployment: 49 | :deps/root "slim"}} 50 | :ns-default build} 51 | :test {:extra-paths ["test"] 52 | :extra-deps {org.clojure/test.check {:mvn/version "1.1.1"} 53 | io.github.cognitect-labs/test-runner 54 | {:git/tag "v0.5.0" :git/sha "48c3c67"}}}}} 55 | -------------------------------------------------------------------------------- /doc/intro.md: -------------------------------------------------------------------------------- 1 | # Introduction to event-driven-architecture-example 2 | 3 | TODO: write [great documentation](http://jacobian.org/writing/what-to-write/) 4 | -------------------------------------------------------------------------------- /pom.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4.0.0 4 | net.clojars.janetacarr 5 | event-driven-architecture-example 6 | 0.1.0-SNAPSHOT 7 | janetacarr/event-driven-architecture-example 8 | FIXME: my new application. 9 | https://github.com/janetacarr/event-driven-architecture-example 10 | 11 | 12 | Eclipse Public License 13 | http://www.eclipse.org/legal/epl-v10.html 14 | 15 | 16 | 17 | 18 | Janet 19 | 20 | 21 | 22 | https://github.com/janetacarr/event-driven-architecture-example 23 | scm:git:git://github.com/janetacarr/event-driven-architecture-example.git 24 | scm:git:ssh://git@github.com/janetacarr/event-driven-architecture-example.git 25 | v0.1.0-SNAPSHOT 26 | 27 | 28 | 29 | org.clojure 30 | clojure 31 | 1.10.3 32 | 33 | 34 | 35 | src 36 | 37 | 38 | 39 | clojars 40 | https://repo.clojars.org/ 41 | 42 | 43 | sonatype 44 | https://oss.sonatype.org/content/repositories/snapshots/ 45 | 46 | 47 | 48 | 49 | clojars 50 | Clojars repository 51 | https://clojars.org/repo 52 | 53 | 54 | 55 | -------------------------------------------------------------------------------- /resources/.keep: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/janetacarr/event-driven-architecture-example/47824e85183f753f80aae36c7f1b8f07febb8d7d/resources/.keep -------------------------------------------------------------------------------- /src/janetacarr/event_driven_architecture_example.clj: -------------------------------------------------------------------------------- 1 | (ns janetacarr.event-driven-architecture-example 2 | (:require [clojure.core.async :as a] 3 | [compojure.core :refer :all] 4 | [compojure.route :as route] 5 | [cheshire.core :as json] 6 | [taoensso.timbre :as log] 7 | [environ.core :refer [env]] 8 | [ring.adapter.jetty :refer [run-jetty]] 9 | [ring.util.response :refer [bad-request]]) 10 | (:gen-class)) 11 | 12 | (defn valid-event? 13 | "Pretend to validate your events here!" 14 | [event secret] 15 | event) 16 | 17 | (defonce server (atom nil)) 18 | 19 | ;; Consumers only care about getting a channel 20 | ;; as an argument. This is our consumer 'interface' 21 | (defn payment-received-consumer 22 | [events-chan] 23 | (a/go-loop [event (a/event-deserializer 36 | [publish-fn] 37 | (fn event-deserializer 38 | [event-chan] 39 | (a/go-loop [event (a/! event-bus event))) 76 | 77 | (def serializing-consumer-producer (setup-consumer (->event-deserializer publish-event) 78 | publication 79 | nil)) 80 | 81 | ;; If we were to switch out the event-bus for 82 | ;; something more cloudy, like Kafka or AWS Kinesis, 83 | ;; chances are we'd have to use a different API 84 | ;; for publish events. So best to decouple them here. 85 | ;; Our HTTP Event handler only cares about HTTP and 86 | ;; possibly serializing to something our consumers 87 | ;; are equipped to understand, like EDN. 88 | (defn ->event-handler 89 | [publish-fn] 90 | (fn [req] 91 | (let [{:keys [body]} req] 92 | (if body 93 | (do (publish-fn (slurp body)) 94 | {:status 202}) 95 | (bad-request))))) 96 | 97 | ;; Use compojure for brevity 98 | (defroutes app 99 | (POST "/webhook" [req] (->event-handler publish-event))) 100 | 101 | (defn -main 102 | [& args] 103 | (reset! server (run-jetty app {:port 8080 :join? false}))) 104 | -------------------------------------------------------------------------------- /test/janetacarr/event_driven_architecture_example_test.clj: -------------------------------------------------------------------------------- 1 | (ns janetacarr.event-driven-architecture-example-test 2 | (:require [clojure.test :refer :all] 3 | [janetacarr.event-driven-architecture-example :refer :all])) 4 | 5 | (deftest a-test 6 | (testing "FIXME, I fail." 7 | (is (= 0 1)))) 8 | --------------------------------------------------------------------------------