Building Java App in 2019

Javaアプリケーションのビルドについて様々な側面から語るLT

Transcript

1. Building Java App in 2019
   2019-09-28 @Kengo_TODA / AliEaters٦ཕഈݚ #1
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2. whoami
   KengoTODA @ Works Applications CHINA
   FOSS Creator (715 PRs)
   SpotBugs team core member
   Plugin: Jenkins, SonarQube, SpotBugs, Errorprone,
   Maven, Gradle, semantic-release, GitHub Actions etc.
   Launch Self-Organized Team for Problem Solving
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3. Purpose
   Tell about ‘How we build Java app with FOSS culture’
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4. FOSS culture?
   PR (patch) based development
   Let human focus on creative activity
   Bring code to discuss even unfinished work (WIP),
   to make topics clear (less face-to-face meeting)
   Automate continuous tasks such as code format,
   making release note, and tests before release
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5. Popular Solutions
   Gradle, Maven, Bazel
   Travis CI, Circle CI, GitHub Actions
   Docker, docker-compose
   semantic-release, GitHub Probot
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6. Which JDK?
   Much better situation than before!
   Java is still free, and you need to chose Oracle
   OpenJDK build or an alternative OpenJDK provider
   Consider which environment (especially cloud) you
   use to make your app running
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7. Manage CI config by VCS
   Prefer Jenkinsfile and other YAML format configs
   than GUI config provided by CI tools
   Easy to create CI job dynamically
   Each support version (branch) needs different env
   and test
   Use Maven Wrapper or Gradle Wrapper to share the
   version of build tool
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8. semantic-release
   Release every commits in the target branch
   No more SNAPSHOT version!
   Need to follow the Conventional Commits
   Effective even for Java tools (Maven, Gradle)
   Refer my blog post (2019-03-13) for detail
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9. Check More Automatically
   Spotless, SonarQube (SonarCloud), revapi, LGTM,
   Google Errorprone, Dependabot (Maven only),
   Renovate
   textlint, RedPen, prh
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10. Probot and Workflow
    Probot and GitHub Actions lets us trigger program by
    event (push, pull_request, schedule etc.)
    Example: rtd-bot (help for Read The Docs)
    Run CI tasks including test, code format checker,
    document generator, coverage checker and static
    analysis tool etc.
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11. Container for portable env
    Run test everywhere, even browser test
    Launch your app with DB in container, then launch
    client (browser) in host machine or another container
    Contributor can run test even in local env
    Best match with build matrix
    Example: sonar-findbugs
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12. Other tools & services
    gitignore.io
    Plantuml with doclet
    selenium-jupiter, docker browsers?
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13. Enjoy Hacking!
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