Java, Life is Short! J-Fall Netherlands

Transcript

1. @kevindubois Java, Life is Short! Kevin Dubois, Principal Developer Advocate, Red Hat @kevindubois
2. @kevindubois Kevin Dubois • Developer Advocate at Red Hat • 18+ years of experience writing and delivering software • Speak English, Dutch, French, Italian • Passionate about improving Dev Experience with Open Source @kevindubois@mastodon.social youtube.com/@thekevindubois linkedin.com/in/kevindubois github.com/kdubois @kevindubois.com
3. @kevindubois https://openjdk.org/projects/amber/ + https://openjdk.org/jeps/445
4. @kevindubois $ javac HelloWorld.java * $ java HelloWorld Hello World * https://openjdk.org/jeps/330
5. @kevindubois $ jbang init Main.java $ jbang Main.java https://jbang.dev
6. @kevindubois $ jbang init --template=cli hello.java https://jbang.dev
7. @kevindubois GPT jbang --preview init cat.java “Print a cat” jbang --preview init cli.java "create a currency converter" https://jbang.dev
8. @kevindubois Java 21 is now available!
9. @kevindubois Managing multiple (Java) versions Legacy project running Java 8 “Newer projects”: Java 11 “State of the art”: Java 17 “YOLO”: Java 21 Vendor supported: Java 21 Temurin GraalVM: 21
10. @kevindubois https://sdkman.io $ sdk list java $ sdk install java 21-graalce $ sdk install java 21-tem $ sdk use java 21-tem …. $ sdk install maven $ sdk install jbang $ sdk upgrade jbang $ sdk install quarkus
11. @kevindubois Code. Compile. Deploy. Run & Test. Repeat.
12. @kevindubois https://quarkus.io/get-started/
13. @kevindubois https://testcontainers.org
14. @kevindubois Dev Services https://quarkus.io/guides/dev-services ❤
15. @kevindubois Developer Flow Outer loop Inner loop Pull/Merge Request Production Build / Package Code Push Debug Code Review Build Deploy Security Tests Compliance Inner loop Outer loop Developer Test
16. @kevindubois Containers! Cloud! Kubernetes! Serverless!
17. @kevindubois
18. @kevindubois $ quarkus image build <jib/docker/buildpacks> https://www.kevindubois.com/2023/04/25/build-java-container-images-in-seconds-using-quarkus-cli/ podman-desktop.io
19. @kevindubois https://developers.redhat.com/developer-sandbox
20. @kevindubois apiVersion: v1 kind: Service metadata: name: code-with-quarkus spec: ports: - name: https port: 443 protocol: TCP targetPort: 8443 - name: http port: 80 protocol: TCP targetPort: 8080 selector: app.kubernetes.io/name: code-with-quarkus app.kubernetes.io/version: 1.0.0-SNAPSHOT type: ClusterIP apiVersion: apps/v1 kind: Deployment metadata: name: code-with-quarkus spec: replicas: 1 selector: matchLabels: app.kubernetes.io/version: 1.0.0-SNAPSHOT app.kubernetes.io/name: code-with-quarkus template: spec: containers: - env: - name: KUBERNETES_NAMESPACE valueFrom: fieldRef: fieldPath: metadata.namespace image: quay.io/kevindubois/code-with-quarkus:1.0.0 imagePullPolicy: Always name: code-with-quarkus ports: - containerPort: 8080 name: http protocol: TCP - containerPort: 8443 name: https protocol: TCP serviceAccountName: code-with-quarkus
21. @kevindubois “Regular Kubernetes” $ quarkus extension add kubernetes $ quarkus deploy Serverless with Knative $ quarkus deploy knative or functions: quarkus ext add funky || kn func create
22. @kevindubois https://microprofile.io/
23. @kevindubois Release aftercare
24. @kevindubois Observability
25. @kevindubois https://opentelemetry.io/ https://github.com/kdubois/quarkus-observability
26. @kevindubois Metrics https://micrometer.io/ https://github.com/kdubois/quarkus-observability
27. @kevindubois Releasing Distributed Apps
28. @kevindubois JReleaser https://jreleaser.org https://github.com/kdubois/quarkus-jreleaser
29. @kevindubois $ jreleaser init $ jreleaser assemble $ jreleaser full-release https://jreleaser.org https://github.com/kdubois/quarkus-jreleaser $ ./mvnw -Pnative,dist package $ ./mvnw -Prelease jreleaser:full-release
30. @kevindubois
31. @kevindubois Free Developer e-Books! https://developers.redhat.com/eventtutorials
32. @kevindubois Start exploring in the OpenShift Sandbox. Learn containers, Kubernetes, and OpenShift in your browser. developers.redhat.com/developer-sandbox Try Red Hat's products and technologies without setup or configuration.
33. @kevindubois Thank you! @kevindubois@mastodon.social youtube.com/@thekevindubois linkedin.com/in/kevindubois github.com/kdubois @kevindubois.com