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techdebt: FME-15314: Migrate to Gradle Kotlin DSL + Java 17 - #627

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techdebt: FME-15314: Migrate to Gradle Kotlin DSL + Java 17#627
puthrayaharness wants to merge 2 commits into
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techdebt/FME-15314-migrate-to-gradle-java17

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Summary

  • Migrate from Maven to Gradle Kotlin DSL (multi-module project)
  • Upgrade from Java 8 to Java 17 toolchain
  • Adopt fme-version-catalog 0.6.0 for centralized dependency management
  • Replace maven-shade-plugin with Shadow plugin for fat JAR generation (verified relocations work: split.org.apache, split.com.google, split.org.yaml.snakeyaml, split.org.checkerframework)
  • Update CI workflow from Maven to Gradle
  • Remove all Maven files (pom.xml, .ci.settings.xml, update_maven_settings.sh)

Module structure (preserved)

Module Version Notes
pluggable-storage 2.1.0 Pure Java interfaces
redis-wrapper 3.1.2 Shadow JAR (jedis embedded)
client 4.18.3 Shadow JAR with full relocations
testing 4.18.3 Published as java-client-testing
okhttp-modules 4.18.3 Alternative HTTP transport

Known pre-existing issues (not introduced by this PR)

  • okhttp-modules tests: Reference stale Impression constructor (8 args, current API requires 9). This was masked in Maven by depending on java-client:4.14.0-rc1 artifact instead of current source.
  • Powermock tests fail on Java 17: Powermock 1.7 is incompatible with Java 17+ module system. Needs separate migration to mockito-inline.
  • Checkstyle violations: ~500 warnings in test code (pre-existing).

Test plan

  • All modules compile: ./gradlew compileJava (5/5 pass)
  • Shadow JAR produced for client with correct relocations (6.3MB fat jar)
  • Shadow JAR produced for redis-wrapper (1.3MB)
  • Resource filtering works (splitversion.properties = 4.18.3)
  • pluggable-storage and redis-wrapper full build passes (incl. tests)
  • Fix okhttp-modules test compilation (separate PR)
  • Fix Powermock tests for Java 17 (separate PR)

🤖 Generated with Claude Code

Migrate from Maven to Gradle Kotlin DSL multi-module build:
- Adopt fme-version-catalog 0.6.0 for centralized dependency management
- Use fme-gradle-plugin 0.5.0 convention plugins (publishing, jacoco, spotless, sonarqube)
- Replace maven-shade-plugin with Shadow plugin for fat JAR generation
- Upgrade Java toolchain from 8 to 17
- Update CI workflow from Maven to Gradle
- Delete all pom.xml files, .ci.settings.xml, and update_maven_settings.sh

Known issues (pre-existing, not introduced by this PR):
- okhttp-modules test code references stale Impression constructor (8 args vs 9)
- Powermock-based tests fail on Java 17 (needs migration to mockito-inline)
- Checkstyle violations in test code (500 warnings)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
@puthrayaharness
puthrayaharness requested a review from a team as a code owner May 25, 2026 18:07
- Move rootProject.name after pluginManagement{} in settings.gradle.kts (Gradle 8 requirement)
- Add pluggable-storage project to client shadowJar dependencies block to match Maven shade config
- Remove no-op jedis relocate in redis-wrapper, replace with explanatory comment
- Fix CI concurrency group to include github.ref and fallback sha for non-PR runs

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
@puthrayaharness
puthrayaharness deleted the techdebt/FME-15314-migrate-to-gradle-java17 branch May 27, 2026 12:27
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