Java, Life is Short

Transcript

1. @kevindubois 1 Java, Life is Short! Kevin Dubois Principal Developer Advocate, Red Hat
2. @kevindubois This talk is about productivity & developer joy… with Open Source
3. @kevindubois Disclaimer This is an opinionated talk. There are many ways and tools that can help you be more productive. This is a session about my personal experiences & recommendations.
4. @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
5. @kevindubois https://openjdk.org/projects/amber/ + https://openjdk.org/jeps/445
6. @kevindubois $ javac HelloWorld.java $ java HelloWorld Hello World
7. @kevindubois $ jbang init Main.java $ jbang Main.java https://jbang.dev
8. @kevindubois $ jbang init --template=cli hello.java https://jbang.dev
9. @kevindubois GPT jbang --preview init cat.java “Print a cat” jbang --preview init cli.java "create a currency converter" https://jbang.dev
10. @kevindubois Managing multiple (Java) versions Legacy project running Java 8 “Newer projects”: Java 11 “State of the art”: Java 17 “Experimentation”: Java 20/21 Vendor supported: Java 17 GraalVM: 22
11. @kevindubois https://sdkman.io $ sdk list java $ sdk install java 11.0.19-open $ sdk install java 17.0.6-tem $ sdk use java 17.0.6-tem …. $ sdk install maven $ sdk install jbang $ sdk upgrade jbang $ sdk install quarkus 3.0.1.Final
12. @kevindubois Code. Compile. Deploy. Run & Test. Repeat.
13. @kevindubois https://quarkus.io/get-started/
14. @kevindubois https://testcontainers.org
15. @kevindubois Dev Services https://quarkus.io/guides/dev-services ❤
16. @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
17. @kevindubois Containers! Cloud! Kubernetes! Serverless!
18. @kevindubois
19. @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
20. @kevindubois Deploying
21. @kevindubois https://developers.redhat.com/developer-sandbox
22. @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
23. @kevindubois $ quarkus extension add kubernetes $ quarkus deploy $ kn service create cwq --image=quay.io/kevindubois/cwq:1.0 $ quarkus deploy knative
24. @kevindubois https://microprofile.io/
25. @kevindubois Release aftercare
26. @kevindubois Observability
27. @kevindubois https://opentelemetry.io/ https://github.com/kdubois/quarkus-observability
28. @kevindubois Metrics https://micrometer.io/ https://github.com/kdubois/quarkus-observability
29. @kevindubois Releasing Distributed Apps
30. @kevindubois JReleaser https://jreleaser.org https://github.com/kdubois/quarkus-jreleaser
31. @kevindubois $ jreleaser init $ jreleaser assemble $ jreleaser full-release https://jreleaser.org https://github.com/kdubois/quarkus-jreleaser $ mvn -Pnative,dist package $ mvn -Prelease jreleaser:full-release
32. @kevindubois
33. @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.
34. @kevindubois https://red.ht/modernize-enterprise-java
35. @kevindubois Free Developer e-Books! developers.redhat.com/e-books
36. @kevindubois https://speakerdeck.com/kdubois/java-life-is-short
37. @kevindubois Thank you! @kevindubois@mastodon.social youtube.com/@thekevindubois linkedin.com/in/kevindubois github.com/kdubois @kevindubois.com