Take MicroProfile to the Clouds with Quarkus 11.03.2019 Dirk Weil, GEDOPLAN GmbH

Dirk Weil GEDOPLAN GmbH, Bielefeld GEDOPLAN IT Consulting Software development, consulting, concepts, reviews GEDOPLAN IT Training Java, JEE, Tools etc. in Berlin, Bielefeld, on-site JEE since 1998 Speaker and author 2 gedoplan.de Take MicroProfile to the Clouds with Quarkus

Java EE  Jakarta EE 2017: Project EE4J (Eclipse Enterprise for Java) Product name Jakarta EE Oracle keeps copyright Java EE Package names javax.* Jakarta EE 8 same code as Java EE 8 released Sept 10 2019 3 JEE gedoplan.de Take MicroProfile to the Clouds with Quarkus

MicroProfile microprofile.io „Next step of Java EE / Jakarta EE evolution“ „… optimize Enterprise Java for a microservices architecture …“ 4 Config 1.3 Fault Tolerance 2.0 Health 2.0 JWT Authentication 1.1 Metrics 2.0.0 OpenAPI 1.1 OpenTracing 1.3 Rest Client 1.3 CDI 2.0 JAX-RS 2.1 JSON-B 1.0 JSON-P 1.1 gedoplan.de Take MicroProfile to the Clouds with Quarkus

Microprofile runtimes: JEE application server 5 Application classes Config files (deployment descriptors, properties, …) JEE Server CDI runtime JPAruntime REST runtime Technical config * JRE build deploy run * Database, messaging security … Thin WAR small large gedoplan.de Take MicroProfile to the Clouds with Quarkus

Microprofile Runtimes: „Micro“ frameworks 6 Application classes Config files * CDI runtime JPA runtime REST runtime JRE build run * Application properties, database, messaging security … Fat JAR JAR + Dependencies large gedoplan.de Take MicroProfile to the Clouds with Quarkus

Quarkus Red Hats answer to Spring Boot Designated successor of Thorntail (aka WildFly Swarm) Optimized for quick start and short time to first response Hotspot and GraalVM https://quarkus.io/ 7 gedoplan.de Take MicroProfile to the Clouds with Quarkus

Quarkus Core + extensions (= Maven dependencies) Project bootstrap via Maven plugin (or Gradle) 8 io.quarkus quarkus-bom ${quarkus.version} pom import io.quarkus quarkus-resteasy io.quarkus quarkus-junit5 test mvn io.quarkus:quarkus-maven-plugin:create \ -DprojectGroupId=de.gedoplan.showcase \ -DprojectArtifactId=quarkus-getting-started \ -DclassName="de.gedoplan.showcase.api.GreetingResource" \ -Dpath="/hello" gedoplan.de Take MicroProfile to the Clouds with Quarkus

Quarkus Maven plugin for build Thin jar target/quarkus-getting-started-runner.jar Dependencies in target/lib/ Application start java –jar target/quarkus-getting-started-runner.jar 9 io.quarkus quarkus-maven-plugin ${quarkus.version} build gedoplan.de Take MicroProfile to the Clouds with Quarkus

Quarkus Development mode Hot reload triggered by REST/web request if source has changed 10 $ mvn quarkus:dev Listening for transport dt_socket at address: 5005 17:54:50,319 INFO [io.qua.dep.QuarkusAugmentor] (main) Beginning quarkus au 17:54:50,949 INFO [io.qua.resteasy] (build-1) Resteasy running without serv 17:54:50,949 INFO [io.qua.resteasy] (build-1) - Add quarkus-undertow to run 17:54:50,980 INFO [io.qua.dep.QuarkusAugmentor] (main) Quarkus augmentation 17:54:52,452 INFO [io.quarkus] (main) Quarkus started in 2.320s. Listening 17:54:52,452 INFO [io.quarkus] (main) Profile dev activated. Live Coding ac 17:54:52,454 INFO [io.quarkus] (main) Installed features: [cdi, resteasy] Demo quarkus-getting-started gedoplan.de Take MicroProfile to the Clouds with Quarkus

MicroProfile Config Simple-to-use, injectable application configuration 11 @Path("/hello") public class GreetingResource { @Inject @ConfigProperty(name = "greeting.message") String message; @Inject @ConfigProperty(name = "greeting.name") Optional name; greeting.message = Hola META-INF/microprofile-config.properties greeting.name = world System property GREETING_MESSAGE = Hello Environment variable Priority gedoplan.de Take MicroProfile to the Clouds with Quarkus

Quarkus Config Additional configuration source application.properties Configuration profiles prod, dev, test extensible 12 greeting.message = Hello greeting.name = world %dev.greeting.name = developer %test.greeting.name = tester application.properties gedoplan.de Take MicroProfile to the Clouds with Quarkus

MicroProfile Health REST endpoints for liveness and readiness /health/live and /health/ready Custom checks 13 @ApplicationScoped @Liveness public class LivenessCheck implements HealthCheck { @Inject LivenessSimulationService liveSvc; @Override public HealthCheckResponse call() { return HealthCheckResponse .named("livenessSimulation") .state(this.liveSrv.isLive()) .build(); { "status": "UP", "checks": [ { "name": "livenessSimulation", "status": "UP" } ] } gedoplan.de Take MicroProfile to the Clouds with Quarkus

MicroProfile Metrics REST endpoints for measured data /metrics/{application|base|vendor}/name Formats: OpenMetrics (Prometheus), JSON Custom metrics 14 @GET @Timed(name = "personList", absolute = true) public List getAll() { @POST @Counted(name = "createPerson", absolute = true) public Response createPerson(Person Person) { @Gauge(name = "answerToLifeUniverseAndEverything", absolute = true, unit = MetricUnits.NONE) public long getAnswerToLifeUniverseAndEverything() { return 42; { "personList" : { "count": 5, "min": 1670500.0, "mean": 8909118.276749168, "max": 3.73522E7, … } } gedoplan.de Take MicroProfile to the Clouds with Quarkus

MicroProfile Fault Tolerance Interceptors for resilience @Retry repeats calls after errors (=exceptions) @Timeout cancels hanging calls @Fallback supplies replacement value 15 @Retry(maxRetries = 4) public int doSomethingWithRetry() { @Timeout(1000) public int doSomethingWithTimeout() { private int return42() { return 42; } @Fallback(fallbackMethod = "return42") public int doSomethingWithFallback() { gedoplan.de Take MicroProfile to the Clouds with Quarkus

MicroProfile Fault Tolerance Interceptors for resilience @CircuitBreaker suppresses calls after high error rate 16 @CircuitBreaker(failureRatio = 0.25, requestVolumeThreshold = 10) public int doSomethingWithCircuitBreaker() { closed open half-open too many errors ok delay error gedoplan.de Take MicroProfile to the Clouds with Quarkus

Quarkus CDI / JPA CDI implementation ArC CDI 2.0 subset von CDI 2.0 no decorators, portable extensions, specialization, passivation ignore beans.xml contents not yet: interceptors on super classes, transactional observers Build time DI JPA implementation Hibernate Datasource config in application.properties DB extensions for PostgreSQL, H2, MariaDB, MS SQL, Derby 17 gedoplan.de Take MicroProfile to the Clouds with Quarkus

Native Graal VM: Build native application target/xyz-runner Effectively used code only Non-Linux build in Docker container Starts within milliseconds, low memory consumption 18 gedoplan.de quarkus-getting-started $ mvn -Pnative,docker … [INFO] docker run -v //c/GEDOPLAN/projects/gedoplan/showcase/quar [quarkus-getting-started-runner:22] classlist: 4,939.89 ms … [quarkus-getting-started-runner:22] write: 576.45 ms [quarkus-getting-started-runner:22] [total]: 121,756.96 ms [INFO] Quarkus augmentation completed in 126125ms … [INFO] DOCKER> Built image sha256:0eb9a Take MicroProfile to the Clouds with Quarkus

Additional features Websockets OpenAPI + Swagger UI Messaging (reactive + imperative) with AMQP, Kafka, JMS NoSQL Flyway OpenID, Keycloak, JWT RBAC Spring DI, Web, Data JPA, Security Scheduling Mail JSF … 19 gedoplan.de Take MicroProfile to the Clouds with Quarkus

Conclusion MicroProfile (+ JEE) = Lightweight Enterprise Java Quarkus ~ Spring Boot for JEE only small changes for JEE developers is fun to work with includes native execution aims at cloud, serverless young (started in 2018), but approved components 20 gedoplan.de Take MicroProfile to the Clouds with Quarkus

More Slides: speakerdeck.com/dirkweil/take-microprofile- to-the-clouds-with-quarkus Demo projects: github.com/GEDOPLAN/quarkus-demo www.gedoplan-it-training.de Trainings in Berlin, Bielefeld, on-site new (2020): Microservices mit Quarkus - Grundlagen new (2020): Microservices mit Quarkus - Aufbau new (2019): Java DevOps: Development und Delivery mit Docker, Kubernetes und Jenkins  dirk.weil@gedoplan.de @dirkweil 21 gedoplan.de Take MicroProfile to the Clouds with Quarkus