├── .github └── workflows │ ├── clojars.yml │ └── kaocha.yml ├── .gitignore ├── CHANGELOG.md ├── LICENSE ├── README.md ├── bin ├── kaocha └── mvn-deploy ├── build.clj ├── deps.edn ├── doc └── intro.md ├── pom.xml ├── resources └── .keep ├── src └── cddr │ └── edn_avro.clj ├── test └── cddr │ └── edn_avro_test.clj └── tests.edn /.github/workflows/clojars.yml: -------------------------------------------------------------------------------- 1 | name: Publish to Clojars 2 | 3 | on: 4 | push: 5 | tags: 6 | v.* 7 | 8 | jobs: 9 | 10 | unit: 11 | runs-on: ubuntu-latest 12 | steps: 13 | - uses: actions/checkout@v1 14 | 15 | - name: Prepare java 16 | uses: actions/setup-java@v3 17 | with: 18 | distribution: 'zulu' 19 | java-version: '8' 20 | check-latest: false 21 | 22 | - name: Configure Maven 23 | uses: actions/setup-java@v3 24 | with: # running setup-java again overwrites the settings.xml 25 | distribution: 'temurin' 26 | java-version: '11' 27 | server-id: clojars # Value of the distributionManagement/repository/id field of the pom.xml 28 | server-username: CLOJARS_USERNAME # env variable for username in deploy 29 | server-password: CLOJARS_PASSWORD # env variable for token in deploy 30 | gpg-private-key: ${{ secrets.GPG_PRIVATE_KEY }} # Value of the GPG private key to import 31 | gpg-passphrase: GPG_PASSPHRASE # env variable for GPG private key passphrase 32 | 33 | - name: Publish to Clojars 34 | run: bin/mvn-deploy 35 | env: 36 | CLOJARS_USERNAME: cddr 37 | CLOJARS_PASSWORD: ${{ secrets.CLOJARS_PASSWORD }} 38 | GPG_PASSPHRASE: ${{ secrets.GPG_PASSPHRASE }} 39 | -------------------------------------------------------------------------------- /.github/workflows/kaocha.yml: -------------------------------------------------------------------------------- 1 | name: Kaocha 2 | 3 | on: 4 | push: 5 | branches: 6 | - main 7 | paths: 8 | - '**.clj' 9 | - '**.edn' 10 | 11 | jobs: 12 | 13 | unit: 14 | runs-on: ubuntu-latest 15 | steps: 16 | - uses: actions/checkout@v1 17 | - name: Install clojure tools 18 | uses: DeLaGuardo/setup-clojure@10.1 19 | with: 20 | cli: 1.10.3.1087 21 | - name: Unit Tests 22 | run: bin/kaocha 23 | -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | /target 2 | /classes 3 | /checkouts 4 | *.jar 5 | *.class 6 | /.cpcache 7 | /.lein-* 8 | /.nrepl-history 9 | /.nrepl-port 10 | .hgignore 11 | .hg/ 12 | -------------------------------------------------------------------------------- /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] - 2020-06-15 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 - 2020-06-15 19 | ### Added 20 | - Files from the new template. 21 | - Widget maker public API - `make-widget-sync`. 22 | 23 | [Unreleased]: https://github.com/your-name/edn-avro/compare/0.1.1...HEAD 24 | [0.1.1]: https://github.com/your-name/edn-avro/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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No party to this 212 | Agreement will bring a legal action under this Agreement more than one year 213 | after the cause of action arose. Each party waives its rights to a jury trial 214 | in any resulting litigation. 215 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # edn-avro 2 | 3 | [![Tests](https://github.com/cddr/edn-avro/actions/workflows/kaocha.yml/badge.svg) | 4 | [![Current Release](https://img.shields.io/clojars/v/cddr/edn-avro.svg)](https://clojars.org/cddr/edn-avro) 5 | 6 | Conversion between EDN and Avro GenericDatums (and back) 7 | 8 | ## Rationale 9 | 10 | Clojure has an excellent library for serializing Clojure objects to avro in 11 | the form of abracad.avro. It works great for scenarios where you're writing 12 | the schema once in the header section of a file or something, and then for 13 | the rest of the records you just write out the raw bytes. 14 | 15 | However when working with the confluent schema registry, you need to produce 16 | avro values that come in a container that includes the schema (the serializer 17 | can be configured to fail if the provided schema is not compatible with 18 | those that have been registered already on the same kafka topic). 19 | 20 | This library make it easy to wrap your clojure values in just such a container. 21 | 22 | Armed with a utility such as this, there is no longer a need to use custom 23 | implementations of KafkaAvroSerializer and Serde interfaces. Instead we just 24 | use the standard implmentations and convert our EDN data into a GenericDatum 25 | instance before sending it to a kafka producer or returning it in a kafka stream. 26 | 27 | ## Usage 28 | 29 | ``` 30 | (ns my.cool.app 31 | (:require 32 | [cddr.edn-avro :as avro]) 33 | (:import 34 | (java.util Properties) 35 | (org.apache.kafka.clients.producer KafkaProducer))) 36 | 37 | (def schema {:type "record" 38 | :name "Foo" 39 | :fields [{:name "aString" :type "string"} 40 | {:name "aUnion" :type ["string" "null"]}]}) 41 | 42 | (def cfg (doto (Properties.) 43 | (.put "bootstrap.servers" "localhost:9092") 44 | (.put "acks" "all") 45 | (.put "key.serializer" "io.confluent.kafka.serializers.KafkaAvroSerializer") 46 | (.put "value.serializer" "io.confluent.kafka.serializers.KafkaAvroSerializer"))) 47 | 48 | (def p (KafkaProducer. cfg)) 49 | 50 | @(.send p (as-avro {:aString "test-1" 51 | :aUnion "test-2"} 52 | {:schema schema})) 53 | 54 | @(.send p (as-avro {:aString "test-1" 55 | :aUnion nil} 56 | {:schema schema})) 57 | 58 | ``` 59 | 60 | ## License 61 | 62 | Copyright © 2020 Andy Chambers 63 | 64 | 65 | Distributed under the Eclipse Public License either version 1.0 or (at 66 | your option) any later version. 67 | -------------------------------------------------------------------------------- /bin/kaocha: -------------------------------------------------------------------------------- 1 | #!/usr/bin/env sh 2 | clojure -M:test -m kaocha.runner "$@" 3 | -------------------------------------------------------------------------------- /bin/mvn-deploy: -------------------------------------------------------------------------------- 1 | #!/bin/sh 2 | 3 | mvn deploy:deploy-file \ 4 | -Dfile=target/edn-avro-$(clj -T:build print-version).jar \ 5 | -DrepositoryId=clojars \ 6 | -Durl=https://clojars.org/repo/ \ 7 | -DpomFile=target/classes/META-INF/maven/cddr/edn-avro/pom.xml \ 8 | -Dgpg.passphrase=$GPG_PASSPHRASE 9 | -------------------------------------------------------------------------------- /build.clj: -------------------------------------------------------------------------------- 1 | (ns build 2 | (:require 3 | [clojure.string :as str] 4 | [clojure.tools.build.api :as b] 5 | [deps-deploy.deps-deploy :as dd])) 6 | 7 | (def version 8 | (let [git-tag (b/git-process {:git-args "describe --tags --abbrev=0"}) 9 | git-describe (b/git-process {:git-args "describe"})] 10 | (str/join "-" (->> [git-tag (when-not (= git-tag git-describe) 11 | "SNAPSHOT")] 12 | (remove nil?))))) 13 | 14 | (def lib 'cddr/edn-avro) 15 | (def class-dir "target/classes") 16 | (def basis (b/create-basis {:project "deps.edn"})) 17 | (def jar-file (format "target/%s-%s.jar" (name lib) version)) 18 | 19 | (defn clean [_] 20 | (b/delete {:path "target"})) 21 | 22 | (defn print-version [_] 23 | (print version)) 24 | 25 | (defn jar [_] 26 | (b/write-pom {:class-dir class-dir 27 | :lib lib 28 | :version version 29 | :basis basis 30 | :src-dirs ["src"]}) 31 | (b/copy-dir {:src-dirs ["src" "resources"] 32 | :target-dir class-dir}) 33 | (b/jar {:class-dir class-dir 34 | :jar-file jar-file})) 35 | 36 | (defn deploy [_] 37 | (dd/deploy {:installer :remote 38 | :sign-releases? true 39 | :sign-key-id "6BC21F24EC17A8A5BD712E2015C5A307C7C2315D" 40 | :pom-file (b/pom-path {:lib lib 41 | :class-dir "target/classes"}) 42 | :artifact "edn-avro.jar"})) 43 | -------------------------------------------------------------------------------- /deps.edn: -------------------------------------------------------------------------------- 1 | {:paths ["src" "resources"] 2 | :mvn/repos {"confluent" {:url "https://packages.confluent.io/maven/"}} 3 | :deps {org.clojure/clojure {:mvn/version "1.10.1"} 4 | org.apache.avro/avro {:mvn/version "1.9.2"} 5 | com.damballa/abracad {:mvn/version "0.4.13"} 6 | metosin/jsonista {:mvn/version "0.3.5"}} 7 | :aliases 8 | {:test {:extra-deps {lambdaisland/kaocha {:mvn/version "1.60.945"} 9 | io.confluent/kafka-avro-serializer {:mvn/version "5.2.1"} 10 | io.confluent/kafka-schema-registry {:mvn/version "5.2.1"}}} 11 | 12 | :build {:deps {io.github.clojure/tools.build {:git/tag "v0.9.3" :git/sha "e537cd1"} 13 | slipset/deps-deploy {:mvn/version "0.2.0"}} 14 | :ns-default build} 15 | 16 | :install {:extra-deps {slipset/deps-deploy {:mvn/version "0.2.0"}} 17 | :main-opts ["-m" "deps-deploy.deps-deploy" "install" "edn-avro.jar"]} 18 | 19 | :deploy {:extra-deps {} 20 | :exec-fn deps-deploy.deps-deploy/deploy 21 | :exec-args {:installer :remote 22 | ;; TODO: 23 | ;; 24 | ;; I would like to sign releases because why not? But 25 | ;; deps-deploy at the moment does not yet support 26 | ;; prompt-less password provision. 27 | ;; 28 | ;; :sign-releases? true 29 | ;; :sign-key-id "C1CEE919CCBC3B60B712A1181EC3EBFBDC3C3436" 30 | :artifact "edn-avro.jar"}}}} 31 | -------------------------------------------------------------------------------- /doc/intro.md: -------------------------------------------------------------------------------- 1 | # Introduction to edn-avro 2 | 3 | TODO: write [great documentation](http://jacobian.org/writing/what-to-write/) 4 | -------------------------------------------------------------------------------- /pom.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4.0.0 4 | jar 5 | cddr 6 | edn-avro 7 | placeholder 8 | edn-avro 9 | 10 | 11 | org.clojure 12 | clojure 13 | 1.10.1 14 | 15 | 16 | org.apache.avro 17 | avro 18 | 1.9.2 19 | 20 | 21 | com.damballa 22 | abracad 23 | 0.4.13 24 | 25 | 26 | metosin 27 | jsonista 28 | 0.3.5 29 | 30 | 31 | 32 | src 33 | 34 | 35 | org.apache.maven.plugins 36 | maven-gpg-plugin 37 | 3.0.1 38 | 39 | 40 | sign-artifacts 41 | verify 42 | 43 | sign 44 | 45 | 46 | 47 | 48 | 49 | 50 | 51 | 52 | clojars 53 | https://repo.clojars.org/ 54 | 55 | 56 | confluent 57 | https://packages.confluent.io/maven/ 58 | 59 | 60 | 61 | -------------------------------------------------------------------------------- /resources/.keep: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/cddr/edn-avro/075c21e173069c10dc66c5318036bca565406f97/resources/.keep -------------------------------------------------------------------------------- /src/cddr/edn_avro.clj: -------------------------------------------------------------------------------- 1 | (ns cddr.edn-avro 2 | (:require 3 | [abracad.avro :as avro] 4 | [abracad.avro.util :refer [coerce]] 5 | [jsonista.core :as json]) 6 | (:import 7 | (abracad.avro ClojureDatumWriter ClojureDatumReader) 8 | (java.nio ByteBuffer) 9 | (java.io ByteArrayInputStream ByteArrayOutputStream DataInputStream) 10 | (org.apache.avro Schema Schema$Parser Schema$Type) 11 | (org.apache.avro.generic GenericData GenericData$Record 12 | GenericRecordBuilder GenericDatumWriter GenericDatumReader) 13 | (org.apache.avro.io 14 | EncoderFactory DecoderFactory JsonEncoder JsonDecoder))) 15 | 16 | (defn avro-schema 17 | "Parses an avro schema (expressed as edn data)" 18 | [schema] 19 | (let [parser (Schema$Parser.)] 20 | (.parse parser (json/write-value-as-string schema)))) 21 | 22 | (defn as-avro 23 | [object {:keys [schema]}] 24 | (let [schema-w (if (instance? Schema schema) 25 | schema 26 | (avro-schema schema)) 27 | cdr (ClojureDatumWriter. schema-w) 28 | out (ByteArrayOutputStream.) 29 | gdr (GenericDatumReader. schema-w)] 30 | (.write cdr schema-w object (.directBinaryEncoder (EncoderFactory.) out nil)) 31 | (.read gdr nil (.binaryDecoder (DecoderFactory.) (.toByteArray out) nil)))) 32 | 33 | (defn as-edn 34 | [generic-datum {:keys [schema]}] 35 | (let [schema-w (.getSchema generic-datum) 36 | schema-r (if (instance? Schema schema) 37 | schema 38 | (when schema 39 | (avro-schema schema))) 40 | cdr (ClojureDatumReader. (or schema-r schema-w)) 41 | gdw (GenericDatumWriter. schema-w) 42 | out (ByteArrayOutputStream.) 43 | df (DecoderFactory.)] 44 | 45 | (.write gdw generic-datum (.directBinaryEncoder (EncoderFactory.) out nil)) 46 | (let [gr-bytes (.toByteArray out) 47 | decoder (cond->> (.directBinaryDecoder df (ByteArrayInputStream. 48 | (.toByteArray out)) 49 | nil) 50 | schema (.resolvingDecoder df schema-w schema-r))] 51 | (.read cdr nil decoder)))) 52 | 53 | (comment 54 | ;; roundtrip a record (optionally using a custom reader schema) 55 | (let [s1 {:type "record" 56 | :name "Foo" 57 | :fields [{:name "yolo" 58 | :type ["string" "null"]}]} 59 | s2 {:type "record" 60 | :name "Foo" 61 | :fields [{:name "yolo" 62 | :type ["string" "null"]} 63 | {:name "abc" 64 | :type ["null" "long"] 65 | :default nil}]} 66 | 67 | avit (as-avro {:yolo "yolo"} {:schema s1})] 68 | 69 | (-> avit 70 | (as-edn {:schema s2}))) 71 | ;; {"yolo" {"string" "yolo"}, "abc" nil} 72 | 73 | (-> avit 74 | (as-edn {})) 75 | ;; {"yolo" {"string" "yolo"}} 76 | 77 | (let [s1 (avro-schema "string") 78 | avit (as-avro "yolo" {:schema s1})] 79 | avit) 80 | ;; (-> avit 81 | ;; (as- 82 | (prn :fini) 83 | 84 | ) 85 | -------------------------------------------------------------------------------- /test/cddr/edn_avro_test.clj: -------------------------------------------------------------------------------- 1 | (ns cddr.edn-avro-test 2 | (:require 3 | [clojure.test :refer :all] 4 | [cddr.edn-avro :as ea]) 5 | (:import 6 | (org.apache.avro.generic GenericData$Record) 7 | (io.confluent.kafka.serializers KafkaAvroSerializer KafkaAvroDeserializer) 8 | (io.confluent.kafka.schemaregistry.client MockSchemaRegistryClient))) 9 | 10 | (deftest test-kafka-avro-serializer 11 | (testing "can serialize record" 12 | (let [schema (ea/avro-schema {:type "record" 13 | :name "Foo" 14 | :fields [{:name "yolo" 15 | :type ["string" "null"]}]}) 16 | mock-reg (MockSchemaRegistryClient.) 17 | serializer (KafkaAvroSerializer. mock-reg {"schema.registry.url" "test.reg"}) 18 | msg (ea/as-avro {:yolo "yolo"} {:schema schema})] 19 | 20 | (is (.serialize serializer "yolo" msg)))) 21 | 22 | (testing "can serialize primitive" 23 | (let [schema (ea/avro-schema "string") 24 | mock-reg (MockSchemaRegistryClient.) 25 | serializer (KafkaAvroSerializer. mock-reg {"schema.registry.url" "test.reg"}) 26 | msg (ea/as-avro "yolo" {:schema schema})] 27 | 28 | (is (.serialize serializer "yolo" msg))))) 29 | 30 | (deftest test-kafka-avro-deserializer 31 | (testing "can deserialize record" 32 | (let [schema (ea/avro-schema {:type "record" 33 | :name "Foo" 34 | :fields [{:name "yolo" 35 | :type ["string" "null"]}]}) 36 | mock-reg (MockSchemaRegistryClient.) 37 | serializer (KafkaAvroSerializer. mock-reg {"schema.registry.url" "test.reg"}) 38 | deserializer (KafkaAvroDeserializer. mock-reg {"schema.registry.url" "test.reg"}) 39 | bytes (->> (ea/as-avro {:yolo "yolo"} {:schema schema}) 40 | (.serialize serializer "yolo"))] 41 | 42 | (is (instance? GenericData$Record (.deserialize deserializer "yolo" bytes))))) 43 | 44 | (testing "can deserialize primitive" 45 | (let [schema (ea/avro-schema "string") 46 | mock-reg (MockSchemaRegistryClient.) 47 | serializer (KafkaAvroSerializer. mock-reg {"schema.registry.url" "test.reg"}) 48 | deserializer (KafkaAvroDeserializer. mock-reg {"schema.registry.url" "test.reg"}) 49 | bytes (->> (ea/as-avro "yolo" {:schema schema}) 50 | (.serialize serializer "yolo"))] 51 | 52 | (is (= "yolo" 53 | (.deserialize deserializer "yolo" bytes)))))) 54 | 55 | (deftest test-roundtrip 56 | (let [schema (ea/avro-schema {:type "record" 57 | :name "Foo" 58 | :fields [{:name "yolo" 59 | :type ["string" "null"]}]}) 60 | mock-reg (MockSchemaRegistryClient.) 61 | serializer (KafkaAvroSerializer. mock-reg {"schema.registry.url" "test.reg"}) 62 | deserializer (KafkaAvroDeserializer. mock-reg {"schema.registry.url" "test.reg"})] 63 | 64 | (let [test-msg {:yolo "yolo"} 65 | as-avro (ea/as-avro test-msg {:schema schema}) 66 | as-edn (ea/as-edn as-avro {:schema schema})] 67 | (is (= test-msg as-edn))))) 68 | 69 | 70 | (deftest test-various-types 71 | (let [schema (ea/avro-schema 72 | {:type "record" 73 | :name "Foo" 74 | :fields [ 75 | {:name "aNull" 76 | :type "null"} 77 | 78 | {:name "aBool" 79 | :type "boolean"} 80 | 81 | {:name "aInt" :type "int"} 82 | {:name "aLong" :type "long"} 83 | {:name "aFloat" :type "float"} 84 | {:name "aDouble" :type "double"} 85 | {:name "aBytes" :type "bytes"} 86 | {:name "aString" :type "string"} 87 | 88 | ]})] 89 | 90 | (let [test-msg {:aNull nil 91 | :aBool true 92 | :aInt 42 93 | :aLong 2147483647 94 | :aFloat (float 3.234) 95 | :aDouble 1.0000000000000002 96 | :aBytes (.getBytes "yolo") 97 | :aString "yolo"} 98 | as-avro (ea/as-avro test-msg {:schema schema})] 99 | 100 | (is (instance? GenericData$Record as-avro)) 101 | 102 | (let [as-edn (ea/as-edn as-avro {:schema schema})] 103 | 104 | (is (= (:aNull as-edn) nil)) 105 | (is (= (:aBool as-edn) true)) 106 | (is (= (:aLong as-edn) 2147483647)) 107 | (is (= (:aFloat as-edn) (float 3.234))) 108 | (is (= (:aDouble as-edn) 1.0000000000000002)) 109 | (is (= (:aString as-edn) "yolo")) 110 | (is (= (map byte (:aBytes as-edn)) 111 | (map byte (.getBytes "yolo")))))))) 112 | -------------------------------------------------------------------------------- /tests.edn: -------------------------------------------------------------------------------- 1 | {:kaocha/tests [{:kaocha.testable/type :kaocha.type/clojure.test 2 | :kaocha.testable/id :unit 3 | :kaocha/ns-patterns ["-test$"] 4 | :kaocha/source-paths ["src"] 5 | :kaocha/test-paths ["test"]}] 6 | :kaocha/fail-fast? false 7 | :kaocha/color? true 8 | :kaocha/reporter [kaocha.report/dots] 9 | :kaocha/plugins [:kaocha.plugin/randomize 10 | :kaocha.plugin/filter 11 | :kaocha.plugin/capture-output 12 | :kaocha.plugin/profiling] 13 | :kaocha.plugin.randomize/randomize? true 14 | :kaocha.plugin.profiling/count 3 15 | :kaocha.plugin.profiling/profiling? true} 16 | --------------------------------------------------------------------------------