Devoxx UK - Java Life is Short

Transcript

1. @kevindubois #DevoxxUK
   Java, Life is Short!
   Kevin Dubois,
   Principal Developer Advocate, Red Hat
   

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2. @kevindubois #DevoxxUK
   Productivity
   & Developer Joy…
   with Open Source
   

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3. @kevindubois #DevoxxUK
   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.
   (And my firm belief that Quarkus is awesome :D )
   

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4. @kevindubois #DevoxxUK
   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
   @[email protected]
   youtube.com/@thekevindubois
   linkedin.com/in/kevindubois
   github.com/kdubois
   

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5. @kevindubois #DevoxxUK
   https://openjdk.org/projects/amber/ + https://openjdk.org/jeps/445
   

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6. @kevindubois #DevoxxUK
   $ javac HelloWorld.java
   $ java HelloWorld
   Hello World
   

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7. @kevindubois #DevoxxUK
   $ jbang init Main.java
   $ jbang Main.java
   https://jbang.dev
   

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8. @kevindubois #DevoxxUK
   $ jbang init --template=cli hello.java
   https://jbang.dev
   

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9. @kevindubois #DevoxxUK
   GPT
   jbang --preview init cat.java “Print a cat”
   jbang --preview init cli.java "create a currency converter"
   https://jbang.dev
   

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10. @kevindubois #DevoxxUK
    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
    

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11. @kevindubois #DevoxxUK
    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
    

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12. @kevindubois #DevoxxUK
    Code.
    Compile.
    Deploy.
    Run & Test.
    Repeat.
    

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13. @kevindubois #DevoxxUK
    https://quarkus.io/get-started/
    

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14. @kevindubois #DevoxxUK
    https://testcontainers.org
    

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15. @kevindubois #DevoxxUK
    Dev Services
    https://quarkus.io/guides/dev-services
    ❤
    

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16. @kevindubois #DevoxxUK
    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
    

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17. @kevindubois #DevoxxUK
    Containers!
    Cloud!
    Kubernetes!
    Serverless!
    

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18. @kevindubois #DevoxxUK
    

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19. @kevindubois #DevoxxUK
    quarkus image build
    
    https://www.kevindubois.com/2023/04/25/build-java-container-images-in-seconds-using-quarkus-cli/
    podman-desktop.io
    

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20. @kevindubois #DevoxxUK
    Deploying
    

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21. @kevindubois #DevoxxUK
    https://developers.redhat.com/developer-sandbox
    

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22. @kevindubois #DevoxxUK
    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
    

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23. @kevindubois #DevoxxUK
    $ quarkus extension add kubernetes
    $ quarkus deploy
    $ kn service create code-with-quarkus --image=quay.io/kevindubois/qwq:1.0
    

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24. @kevindubois #DevoxxUK
    https://microprofile.io/
    

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25. @kevindubois #DevoxxUK
    Release aftercare
    

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26. @kevindubois #DevoxxUK
    Observability
    

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27. @kevindubois #DevoxxUK
    https://opentelemetry.io/
    https://github.com/kdubois/quarkus-observability
    

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28. @kevindubois #DevoxxUK
    Metrics
    https://micrometer.io/
    https://github.com/kdubois/quarkus-observability
    

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29. @kevindubois #DevoxxUK
    Releasing Distributed Apps
    

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30. @kevindubois #DevoxxUK
    JReleaser
    https://jreleaser.org
    https://github.com/kdubois/quarkus-jreleaser
    

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31. @kevindubois #DevoxxUK
    project :
    name: quarkus-knative
    version : 1.0.0-SNAPSHOT
    description : Quarkus Knative Demo App
    longDescription : Demo App demonstrating using Quarkus with Knative
    authors :
    - Kevin Dubois
    license : Apache-2.0
    links:
    homepage : https://github.com/kdubois/quarkus-knative
    java:
    groupId : com.redhat.developer.demo
    version : 17
    artifactId : quarked
    inceptionYear : 2023
    release :
    github:
    overwrite : true
    changelog :
    formatted : ALWAYS
    preset: conventional-commits
    contributors :
    format: '- {{contributorName}}{{#contributorUsernameAsLink}} ({{.}}){{/contributorUsernameAsLink}}'
    assemble :
    javaArchive :
    quarked :
    active: ALWAYS
    formats : [ ZIP ]
    fileSets :
    - input: '.'
    includes : [ 'LICENSE' ]
    mainJar :
    path: target/{{distributionName}}-{{projectVersion}}-runner.jar
    

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32. @kevindubois #DevoxxUK
    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 -Djreleaser.select.current.platform
    

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33. @kevindubois #DevoxxUK
    

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34. @kevindubois #DevoxxUK
    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.
    

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35. @kevindubois #DevoxxUK
    https://red.ht/modernize-enterprise-java
    

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36. @kevindubois #DevoxxUK
    https://speakerdeck.com/kdubois/devoxx-uk-java-life-is-short
    

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37. @kevindubois #DevoxxUK
    Thank you!
    @[email protected]
    youtube.com/@thekevindubois
    linkedin.com/in/kevindubois
    github.com/kdubois
    Don’t forget to rate this session :)
    🙏
    

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