├── graalvm ├── jni-config.json ├── proxy-config.json ├── reflect-config.json └── resource-config.json ├── .gitignore ├── Makefile ├── dockerfiles ├── Dockerfile.clj-kafka-builder └── docker-compose.dev.yml ├── resources └── logback.xml ├── deps.edn ├── README.md ├── src └── core.clj └── LICENSE /graalvm/jni-config.json: -------------------------------------------------------------------------------- 1 | [ 2 | ] 3 | -------------------------------------------------------------------------------- /graalvm/proxy-config.json: -------------------------------------------------------------------------------- 1 | [ 2 | ] 3 | -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | pom.xml.asc 2 | *.jar 3 | *.class 4 | /lib/ 5 | /classes/ 6 | /target/ 7 | /checkouts/ 8 | .lein-deps-sum 9 | .lein-repl-history 10 | .lein-plugins/ 11 | .lein-failures 12 | .nrepl-port 13 | .cpcache/ 14 | .idea/ 15 | **.iml 16 | release.properties 17 | pom.xml.releaseBackup 18 | .env 19 | clj-kafka 20 | -------------------------------------------------------------------------------- /Makefile: -------------------------------------------------------------------------------- 1 | run-dev-env: 2 | @docker-compose \ 3 | -p clj-kafka \ 4 | -f dockerfiles/docker-compose.dev.yml \ 5 | down 6 | @docker-compose \ 7 | -p clj-kafka \ 8 | -f dockerfiles/docker-compose.dev.yml \ 9 | up 10 | 11 | build-clj-kafka: 12 | docker build -f dockerfiles/Dockerfile.clj-kafka-builder -t clj-kafka-native-image . 13 | docker rm clj-kafka-native-image-build || true 14 | docker create --name clj-kafka-native-image-build clj-kafka-native-image 15 | docker cp clj-kafka-native-image-build:/usr/src/app/clj-kafka clj-kafka 16 | -------------------------------------------------------------------------------- /dockerfiles/Dockerfile.clj-kafka-builder: -------------------------------------------------------------------------------- 1 | FROM oracle/graalvm-ce:20.0.0-java11 as BUILDER 2 | 3 | ENV GRAALVM_HOME=$JAVA_HOME 4 | 5 | RUN gu install native-image \ 6 | && curl -O https://download.clojure.org/install/linux-install-1.10.1.510.sh \ 7 | && chmod +x linux-install-1.10.1.510.sh \ 8 | && ./linux-install-1.10.1.510.sh \ 9 | && rm linux-install-1.10.1.510.sh 10 | 11 | RUN mkdir -p /usr/src/app 12 | WORKDIR /usr/src/app 13 | 14 | COPY deps.edn /usr/src/app/ 15 | RUN clojure -R:native-image 16 | COPY resources/ /usr/src/app/resources 17 | COPY graalvm/ /usr/src/app/graalvm/ 18 | COPY src/ /usr/src/app/src 19 | 20 | RUN clojure -A:native-image 21 | -------------------------------------------------------------------------------- /resources/logback.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | ${LOGGER_TARGET:-System.out} 5 | 6 | %date{ISO8601} %-5p %c{1} - %m%n 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | -------------------------------------------------------------------------------- /dockerfiles/docker-compose.dev.yml: -------------------------------------------------------------------------------- 1 | version: '3' 2 | 3 | services: 4 | zookeeper: 5 | image: wurstmeister/zookeeper:3.4.6 6 | ports: ["2181:2181"] 7 | 8 | broker: 9 | image: wurstmeister/kafka:2.11-1.1.1 10 | depends_on: 11 | - zookeeper 12 | ports: ["9092:9092"] 13 | environment: 14 | KAFKA_ADVERTISED_HOST_NAME: localhost 15 | KAFKA_LISTENERS: PLAINTEXT://broker:29092,PLAINTEXT_HOST://:9092 16 | KAFKA_ADVERTISED_LISTENERS: PLAINTEXT://broker:29092,PLAINTEXT_HOST://localhost:9092 17 | KAFKA_LISTENER_SECURITY_PROTOCOL_MAP: PLAINTEXT:PLAINTEXT,PLAINTEXT_HOST:PLAINTEXT 18 | KAFKA_CREATE_TOPICS: "test:1:1" 19 | KAFKA_ZOOKEEPER_CONNECT: zookeeper:2181 20 | volumes: 21 | - /var/run/docker.sock:/var/run/docker.sock 22 | -------------------------------------------------------------------------------- /deps.edn: -------------------------------------------------------------------------------- 1 | {:paths 2 | ["src" "resources"] 3 | :deps 4 | {org.clojure/clojure {:mvn/version "1.10.2-alpha1"} 5 | org.clojure/tools.logging {:mvn/version "1.0.0"} 6 | ch.qos.logback/logback-core {:mvn/version "1.2.3"} 7 | ch.qos.logback/logback-classic {:mvn/version "1.2.3"} 8 | io.quarkus/quarkus-kafka-client {:mvn/version "1.3.1.Final" 9 | :exclusions [org.jboss.slf4j/slf4j-jboss-logging 10 | org.jboss.logging/jboss-logging]}} 11 | :aliases 12 | {:native-image 13 | {:main-opts ["-m clj.native-image core" 14 | "--enable-https" 15 | "--no-fallback" 16 | "--allow-incomplete-classpath" 17 | "--initialize-at-build-time" 18 | "--enable-all-security-services" 19 | "-H:ReflectionConfigurationFiles=graalvm/reflect-config.json" 20 | "-H:+ReportExceptionStackTraces" 21 | "--initialize-at-run-time=com.fasterxml.jackson.dataformat.cbor.CBORFactory" 22 | ;; optional native image name override 23 | "-H:Name=clj-kafka"] 24 | :jvm-opts ["-Dclojure.compiler.direct-linking=true"] 25 | :extra-deps {clj.native-image 26 | {:git/url "https://github.com/taylorwood/clj.native-image.git" 27 | :exclusions [commons-logging/commons-logging 28 | org.slf4j/slf4j-nop] 29 | :sha "7708e7fd4572459c81f6a6b8e44c96f41cdd92d4"}}}}} 30 | -------------------------------------------------------------------------------- /graalvm/reflect-config.json: -------------------------------------------------------------------------------- 1 | [ 2 | { 3 | "name":"org.apache.kafka.clients.consumer.ConsumerConfig", 4 | "allPublicFields":true 5 | }, 6 | { 7 | "name":"org.apache.kafka.clients.consumer.KafkaConsumer", 8 | "allPublicMethods":true, 9 | "allPublicConstructors":true 10 | }, 11 | { 12 | "name":"org.apache.kafka.clients.consumer.RangeAssignor", 13 | "methods":[{"name":"","parameterTypes":[] }] 14 | }, 15 | { 16 | "name":"org.apache.kafka.clients.producer.KafkaProducer", 17 | "allPublicMethods":true, 18 | "allPublicConstructors":true 19 | }, 20 | { 21 | "name":"org.apache.kafka.clients.producer.ProducerConfig", 22 | "allPublicFields":true 23 | }, 24 | { 25 | "name":"org.apache.kafka.clients.producer.ProducerRecord", 26 | "allPublicConstructors":true 27 | }, 28 | { 29 | "name":"org.apache.kafka.clients.producer.internals.DefaultPartitioner", 30 | "methods":[{"name":"","parameterTypes":[] }] 31 | }, 32 | { 33 | "name":"org.apache.kafka.common.serialization.LongDeserializer", 34 | "methods":[{"name":"","parameterTypes":[] }] 35 | }, 36 | { 37 | "name":"org.apache.kafka.common.serialization.LongSerializer", 38 | "methods":[{"name":"","parameterTypes":[] }] 39 | }, 40 | { 41 | "name":"org.apache.kafka.common.serialization.StringDeserializer", 42 | "methods":[{"name":"","parameterTypes":[] }] 43 | }, 44 | { 45 | "name":"org.apache.kafka.common.serialization.StringSerializer", 46 | "methods":[{"name":"","parameterTypes":[] }] 47 | } 48 | ] 49 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # clojure-kafka-graavm-native-image 2 | 3 | It turns out that it is possible to compile Kafka Producer and Consumer with GraalVM native-image and the demo is all in Clojure. 4 | 5 | ## TL;DR 6 | 7 | ```shell script 8 | make build-clj-kafka && ./clj-kafka 9 | ``` 10 | 11 | ## Demo 12 | 13 | It will start a background thread with a Kafka Producer that every second sends a message to the Kafka. 14 | And in the main thread it'll launch a Kafka Consumer that polls for messages from the same topic as is used by the producer. 15 | Process doesn't stop. 16 | 17 | Cool thing is that the binary starts instantly and use ~28 mb of RAM. 18 | ``` 19 | ./clj-kafka 0.01s user 0.02s system 0% cpu 4.168 total 20 | avg shared (code): 0 KB 21 | avg unshared (data/stack): 0 KB 22 | total (sum): 0 KB 23 | max memory: 28 MB 24 | page faults from disk: 0 25 | other page faults: 1488 26 | ``` 27 | 28 | ## Params 29 | 30 | Environment variables are used: 31 | - `BOOTSTRAP_SERVERS_CONFIG`: Kafka brokers, default value `"127.0.0.1:9092"` 32 | - `TOPIC`: kafka topic name, default value `"test"` 33 | 34 | ## Optional 35 | 36 | Start Kafka cluster in docker-compose in another terminal: 37 | ```shell script 38 | make run-dev-env 39 | ``` 40 | 41 | ## Requirements 42 | 43 | Linux, Docker, docker-compose, clojure. 44 | 45 | For MacOS download GraalVM, install native-image, set `JAVA_HOME`, add native-image to `PATH` and run: 46 | ```shell script 47 | clojure -A:native-image 48 | ``` 49 | Or in one step: 50 | ```shell script 51 | (JAVA_HOME=/home/user/graalvm-ce-java11-20.0.0/ && PATH=/home/user/graalvm-ce-java11-20.0.0/bin:$PATH && clojure -A:native-image) 52 | ``` 53 | 54 | ## License 55 | 56 | Copyright © 2020 [Dainius Jocas](https://www.jocas.lt). 57 | 58 | Distributed under the The Apache License, Version 2.0. 59 | -------------------------------------------------------------------------------- /src/core.clj: -------------------------------------------------------------------------------- 1 | (ns core 2 | (:gen-class) 3 | (:require 4 | [clojure.tools.logging :as log]) 5 | (:import (org.apache.kafka.clients.consumer ConsumerConfig KafkaConsumer) 6 | (org.apache.kafka.clients.producer ProducerConfig KafkaProducer ProducerRecord RecordMetadata) 7 | (org.apache.kafka.common.serialization StringSerializer StringDeserializer) 8 | (java.time Duration) 9 | (java.util Properties))) 10 | 11 | (defn brokers [] 12 | (or (System/getenv "BOOTSTRAP_SERVERS_CONFIG") "127.0.0.1:9092")) 13 | 14 | (defn topic [] 15 | (or (System/getenv "TOPIC") "test")) 16 | 17 | (defn kafka-producer [{:keys [bootstrap-servers-config]}] 18 | (KafkaProducer. 19 | (doto (Properties.) 20 | (.put ProducerConfig/BOOTSTRAP_SERVERS_CONFIG bootstrap-servers-config) 21 | (.put ProducerConfig/CLIENT_ID_CONFIG "KafkaExampleProducer") 22 | (.put ProducerConfig/KEY_SERIALIZER_CLASS_CONFIG (.getName StringSerializer)) 23 | (.put ProducerConfig/VALUE_SERIALIZER_CLASS_CONFIG (.getName StringSerializer))))) 24 | 25 | (defn kafka-consumer [{:keys [bootstrap-servers-config]}] 26 | (KafkaConsumer. 27 | (doto (Properties.) 28 | (.put ConsumerConfig/BOOTSTRAP_SERVERS_CONFIG bootstrap-servers-config) 29 | (.put ConsumerConfig/GROUP_ID_CONFIG "my-group-id") 30 | (.put ConsumerConfig/KEY_DESERIALIZER_CLASS_CONFIG (.getName StringDeserializer)) 31 | (.put ConsumerConfig/VALUE_DESERIALIZER_CLASS_CONFIG (.getName StringDeserializer)) 32 | (.put ConsumerConfig/MAX_POLL_RECORDS_CONFIG (Integer/parseInt "1")) 33 | (.put ConsumerConfig/ENABLE_AUTO_COMMIT_CONFIG "false") 34 | (.put ConsumerConfig/AUTO_OFFSET_RESET_CONFIG "latest")))) 35 | 36 | (defn start-producer [opts] 37 | (let [^KafkaProducer producer (kafka-producer opts) 38 | topic (:topic opts) 39 | thread (Thread. 40 | ^Runnable 41 | (fn [] 42 | (loop [counter 0] 43 | (let [producer-record (ProducerRecord. topic (str counter) (str "test-" counter)) 44 | ^RecordMetadata record-metadata (.get (.send producer producer-record))] 45 | (log/infof "Produced record with offset: %s" (.offset record-metadata))) 46 | (Thread/sleep 1000) 47 | (recur (inc counter)))))] 48 | (.start thread) 49 | thread)) 50 | 51 | (defn start-consumer [opts] 52 | (let [^KafkaConsumer consumer (kafka-consumer opts) 53 | duration (Duration/ofSeconds 2) 54 | ^String topic (:topic opts)] 55 | (.subscribe consumer (re-pattern topic)) 56 | (loop [count 0] 57 | (doseq [r (.poll consumer duration)] 58 | (log/infof "Iteration=%s record='%s'" count r)) 59 | (.commitAsync consumer) 60 | (recur (inc count))))) 61 | 62 | (defn -main [& args] 63 | (let [opts {:bootstrap-servers-config (brokers) 64 | :topic (topic)}] 65 | (log/infof "Starting Clojure Kafka native-image demo with: %s" opts) 66 | (start-producer opts) 67 | (start-consumer opts))) 68 | -------------------------------------------------------------------------------- /graalvm/resource-config.json: -------------------------------------------------------------------------------- 1 | { 2 | "resources":[ 3 | {"pattern":"\\Qclojure/core.clj\\E"}, 4 | {"pattern":"\\Qclojure/core/async.clj\\E"}, 5 | {"pattern":"\\Qclojure/core/async/impl/buffers.clj\\E"}, 6 | {"pattern":"\\Qclojure/core/async/impl/channels.clj\\E"}, 7 | {"pattern":"\\Qclojure/core/async/impl/concurrent.clj\\E"}, 8 | {"pattern":"\\Qclojure/core/async/impl/dispatch.clj\\E"}, 9 | {"pattern":"\\Qclojure/core/async/impl/exec/threadpool.clj\\E"}, 10 | {"pattern":"\\Qclojure/core/async/impl/ioc_macros.clj\\E"}, 11 | {"pattern":"\\Qclojure/core/async/impl/mutex.clj\\E"}, 12 | {"pattern":"\\Qclojure/core/async/impl/protocols.clj\\E"}, 13 | {"pattern":"\\Qclojure/core/async/impl/timers.clj\\E"}, 14 | {"pattern":"\\Qclojure/core/cache.clj\\E"}, 15 | {"pattern":"\\Qclojure/core/memoize.clj\\E"}, 16 | {"pattern":"\\Qclojure/core/server.clj\\E"}, 17 | {"pattern":"\\Qclojure/core/server__init.class\\E"}, 18 | {"pattern":"\\Qclojure/core/specs/alpha.clj\\E"}, 19 | {"pattern":"\\Qclojure/core__init.class\\E"}, 20 | {"pattern":"\\Qclojure/data/priority_map.clj\\E"}, 21 | {"pattern":"\\Qclojure/pprint.clj\\E"}, 22 | {"pattern":"\\Qclojure/pprint__init.class\\E"}, 23 | {"pattern":"\\Qclojure/reflect.clj\\E"}, 24 | {"pattern":"\\Qclojure/reflect__init.class\\E"}, 25 | {"pattern":"\\Qclojure/spec/alpha.clj\\E"}, 26 | {"pattern":"\\Qclojure/spec/alpha__init.class\\E"}, 27 | {"pattern":"\\Qclojure/tools/analyzer.clj\\E"}, 28 | {"pattern":"\\Qclojure/tools/analyzer/ast.clj\\E"}, 29 | {"pattern":"\\Qclojure/tools/analyzer/env.clj\\E"}, 30 | {"pattern":"\\Qclojure/tools/analyzer/jvm.clj\\E"}, 31 | {"pattern":"\\Qclojure/tools/analyzer/jvm/utils.clj\\E"}, 32 | {"pattern":"\\Qclojure/tools/analyzer/passes.clj\\E"}, 33 | {"pattern":"\\Qclojure/tools/analyzer/passes/add_binding_atom.clj\\E"}, 34 | {"pattern":"\\Qclojure/tools/analyzer/passes/cleanup.clj\\E"}, 35 | {"pattern":"\\Qclojure/tools/analyzer/passes/constant_lifter.clj\\E"}, 36 | {"pattern":"\\Qclojure/tools/analyzer/passes/elide_meta.clj\\E"}, 37 | {"pattern":"\\Qclojure/tools/analyzer/passes/emit_form.clj\\E"}, 38 | {"pattern":"\\Qclojure/tools/analyzer/passes/jvm/analyze_host_expr.clj\\E"}, 39 | {"pattern":"\\Qclojure/tools/analyzer/passes/jvm/annotate_host_info.clj\\E"}, 40 | {"pattern":"\\Qclojure/tools/analyzer/passes/jvm/annotate_loops.clj\\E"}, 41 | {"pattern":"\\Qclojure/tools/analyzer/passes/jvm/annotate_tag.clj\\E"}, 42 | {"pattern":"\\Qclojure/tools/analyzer/passes/jvm/box.clj\\E"}, 43 | {"pattern":"\\Qclojure/tools/analyzer/passes/jvm/classify_invoke.clj\\E"}, 44 | {"pattern":"\\Qclojure/tools/analyzer/passes/jvm/constant_lifter.clj\\E"}, 45 | {"pattern":"\\Qclojure/tools/analyzer/passes/jvm/emit_form.clj\\E"}, 46 | {"pattern":"\\Qclojure/tools/analyzer/passes/jvm/fix_case_test.clj\\E"}, 47 | {"pattern":"\\Qclojure/tools/analyzer/passes/jvm/infer_tag.clj\\E"}, 48 | {"pattern":"\\Qclojure/tools/analyzer/passes/jvm/validate.clj\\E"}, 49 | {"pattern":"\\Qclojure/tools/analyzer/passes/jvm/validate_loop_locals.clj\\E"}, 50 | {"pattern":"\\Qclojure/tools/analyzer/passes/jvm/validate_recur.clj\\E"}, 51 | {"pattern":"\\Qclojure/tools/analyzer/passes/jvm/warn_on_reflection.clj\\E"}, 52 | {"pattern":"\\Qclojure/tools/analyzer/passes/source_info.clj\\E"}, 53 | {"pattern":"\\Qclojure/tools/analyzer/passes/trim.clj\\E"}, 54 | {"pattern":"\\Qclojure/tools/analyzer/passes/uniquify.clj\\E"}, 55 | {"pattern":"\\Qclojure/tools/analyzer/passes/warn_earmuff.clj\\E"}, 56 | {"pattern":"\\Qclojure/tools/analyzer/utils.clj\\E"}, 57 | {"pattern":"\\Qclojure/tools/cli.cljc\\E"}, 58 | {"pattern":"\\Qclojure/tools/logging.clj\\E"}, 59 | {"pattern":"\\Qclojure/tools/logging/impl.clj\\E"}, 60 | {"pattern":"\\Qclojure/tools/reader.clj\\E"}, 61 | {"pattern":"\\Qclojure/tools/reader/default_data_readers.clj\\E"}, 62 | {"pattern":"\\Qclojure/tools/reader/impl/commons.clj\\E"}, 63 | {"pattern":"\\Qclojure/tools/reader/impl/errors.clj\\E"}, 64 | {"pattern":"\\Qclojure/tools/reader/impl/inspect.clj\\E"}, 65 | {"pattern":"\\Qclojure/tools/reader/impl/utils.clj\\E"}, 66 | {"pattern":"\\Qclojure/tools/reader/reader_types.clj\\E"}, 67 | {"pattern":"\\Qcore.clj\\E"}, 68 | {"pattern":"\\Qcore/async.clj\\E"}, 69 | {"pattern":"\\Qcore/cartesian.clj\\E"}, 70 | {"pattern":"\\Qcore/http.clj\\E"}, 71 | {"pattern":"\\Qcore/ilm.clj\\E"}, 72 | {"pattern":"\\Qcore/index.clj\\E"}, 73 | {"pattern":"\\Qcore/json.clj\\E"}, 74 | {"pattern":"\\Qcore/records.clj\\E"}, 75 | {"pattern":"\\Qjsonista/core.clj\\E"}, 76 | {"pattern":"\\Qkafka/kafka-version.properties\\E"}, 77 | {"pattern":"\\Qorg/httpkit/client.clj\\E"}, 78 | {"pattern":"\\Qorg/httpkit/encode.clj\\E"}, 79 | {"pattern":"\\Qorg/slf4j/impl/StaticLoggerBinder.class\\E"}, 80 | {"pattern":"\\Qprofile_slow_queries.clj\\E"}, 81 | {"pattern":"\\Qreindex.clj\\E"}, 82 | {"pattern":"\\Qreplay.clj\\E"}, 83 | {"pattern":"\\Qscroll.clj\\E"} 84 | ], 85 | "bundles":[] 86 | } 87 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | Apache License 2 | Version 2.0, January 2004 3 | http://www.apache.org/licenses/ 4 | 5 | TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 6 | 7 | 1. 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