Hi there, I'm Dejan 👋

I drove Apache Kafka's three major Gradle upgrades (6→7, 7→8, 8→9) and its Java 25 support, working with Kafka committers and upstream projects.

DevOps and build/release engineer: Java, Scala, Android and more, across desktop, web and mobile apps.

https://github.com/apache/kafka/commits?author=dejan2609

• 🎯 highlights (notable Kafka pull requests):
  • Expand gradle build: include Scala 2.13
  • Remove redundant build code (unblock Gradle version upgrade from 6 to 7)
  • Upgrade Gradle version from 6 to 7
  • Upgrade Gradle version from 7 to 8
  • Switch Gradle Shadow plugin
  • Upgrade Gradle version from 8 to 9
  • Support building with Java 25 (LTS release)
  • CheckStyle version upgrade: 10 -->> 12
  • Reduce build time: use tasks.register for Gradle tasks lazy creation
  • GrGit dependency is dropped in favor of Eclipse JGit
  • Upgrade argparse4 from 0.7.0 to 0.9.0
  • Upgrade Gradle to 9.8.2 (security fix) and fetch the wrapper jar from a pinned commit

Note: this was a joint effort with @romani and @stoyanK7 from Checkstyle team:

• apache/kafka#10967
• checkstyle/checkstyle#16003
• checkstyle/checkstyle#16395
• checkstyle/checkstyle#18263
• apache/kafka#20726
• checkstyle/checkstyle#18272
• checkstyle/checkstyle#18294

Kafka project Java 25 build was dependent on new SpotBugs version that was dependent on Apache Commons Byte Code Engineering Library (BCEL).
My role: I created a few tickets and testing PRs in order to enable Kafka's Java 25 build.

• https://issues.apache.org/jira/browse/KAFKA-19664 Support building with Java 25 (LTS release)
• https://issues.apache.org/jira/browse/BCEL-377 Fix testing on Java 24 and up (initial title: Could you please release Java 25 compatible version ?)
• spotbugs/spotbugs#3763 Apache bcel version 6.11.0 and Java 25 build
• apache/kafka#20561 Support building with Java 25 (LTS release)

• Gradle: Regression in Gradle 8.0.1 (corner case for Scala 2.13 build)
• gradle-versions-plugin:
  • Jacoco current version defaults to a Gradle built-in version
  • Checking does jacoco version resolution works as expected with plugin version 0.57.0
• gradle RAT (Release Audit Tool) plugin:
  • task execution is quite long (after upgrading from 0.8.1)
  • [Corner case] build.gradle RAT task license configuration is reported as a license finding
• Apache Software Foundation:
  • 💡 Click here to expand (or collapse) the list of 40+ issues I created in the ASF JIRA

    • BCEL-377 Fix testing on Java 24 and up (with follow-up: SpotBugs release: Apache bcel version 6.11.0 and Java 25 build)
    • MNG-6282 Console output has no colors in shell (both Git Bash and Cygwin) [regression in Jansi 1.16 / Maven 3.5.1]
    • KAFKA-21126 Version updates for build and project dependencies;gradle-versions-plugin reference has been moved to settings.gradle
    • KAFKA-21086 Drop GrGit dependency usage (in favor of existing Eclipse JGit)
    • KAFKA-21064 Apache RAT Gradle plugin version upgrade: 0.8.1 --> 0.11.0
    • RAT-575 [Regression] Slower RAT task execution with recent versions (0.17 and 0.18)
    • RAT-576 Add overall statistics about scanned file types
    • KAFKA-20943 Update Develocity related Gradle plugin versions
    • KAFKA-20882 Reduce build time: use lazy creation for Gradle tasks (i.e. use tasks.register instead of task or tasks.create)
    • KAFKA-20851 Version updates for build dependencies
    • KAFKA-20323 Refactor test method to enable Mockito version upgrade
    • KAFKA-20103 Properties should be assigned using the 'propName = value' syntax
    • KAFKA-20092 Dependencies version updates (for Gradle buildscript and project)
    • KAFKA-20062 [Suggestion] provide compatible CheckStyle version for a different Java versions
    • KAFKA-20061 slf4j-api version upgrade: 1 -->> 2
    • KAFKA-19809 CheckStyle version upgrade: 10 -->> 12
    • KAFKA-19792 Gradle build fails after Swagger patch version update
    • KAFKA-19783 Custom Gradle tasks (unitTest and integrationTest) are not executing tests in Gradle 9
    • KAFKA-19771 Update SpotBugs version and enable Spotbugs Gradle tasks on Java 25
    • KAFKA-19769 [Java 25] few tests are failling (class: clients/org.apache.kafka.common.network.SslTransportLayerTest)
    • KAFKA-19762 Turn on Gradle reproducible builds feature
    • KAFKA-19761 Reorder Gradle tasks (in order to bump Shadow plugin version)
    • KAFKA-19707 Develocity Gradle plugin version can't be upgraded (CI build fails with error: "build scan failed to be published")
    • KAFKA-19664 Support building with Java 25 (LTS release)
    • KAFKA-19654 [Gradle 8 --> 9 upgrade] GitHub Actions build issues: JUnit tests parsing fails (for a new/flaky steps)
    • KAFKA-19636 Exclude some files (like .gitkeep) from Rat checks ?
    • KAFKA-19591 Fix gradlew content: add missing parts (old Groovy template version is being referenced)
    • KAFKA-19174 Gradle version upgrade 8 -->> 9
    • KAFKA-18970 [kafka-clients] Gradle module metadata publication should be enabled
    • KAFKA-18142 Switch Kafka's Gradle build shadow plugin to com.gradleup.shadow (and upgrade version)
    • KAFKA-14749 Re-enable 'spotlessScalaCheck' task (in Jenkinsfile)
    • KAFKA-14728 Remove 'spotlessScalaCheck' task (out of Jenkinsfile)
    • KAFKA-14680 Gradle version upgrade 7 -->> 8
    • KAFKA-12771 CheckStyle attempted upgrade (8.36.2 -->> 8.41.1) summons a pack of 'Indentation' errors
    • KAFKA-12770 Gradle build: allow the CheckStyle version to be specified via parameter
    • KAFKA-12764 Expand Gradle build for Scala 3.0 ?
    • KAFKA-12744 Dependency upgrade: "argparse4j" 0.7.0 -->> 0.9.0
    • KAFKA-12728 Version upgrades: gradle (6.8.3 -->> 7.0.1) and gradle shadow plugin (6.1.0 -->> 7.0.0)
    • KAFKA-12293 Remove JCenter and Bintray repositories mentions out of Gradle build (sunset is announced for those repositories)
    • INFRA-18752 Can't login to lists.apache.org using Google account (error: "Key missing or invalid ! null" is shown)
    • KAFKA-8466 Remove 'jackson-module-scala' dependency (and replace it with some code)
    • KAFKA-8009 Uppgrade Jenkins job Gradle version from 4.10.2 to 5.x
    • KAFKA-5708 Update Jackson dependencies (from 2.8.5 to 2.9.x)
• IntelliJ Idea: https://youtrack.jetbrains.com/issues?q=by:%20dejan2609
• GitLab (note: link requires Google login)

• Ant (+ Ivy), Maven, Gradle, SBT
• Jenkins, Bamboo, Github Actions
• SonarQube, Nexus, Artifactory

• Linux
• AWS
• Kubernetes

• Python
• Ruby
• Go
• Node.JS/ React
• iPhone mobile apps
• SQL (via Flyway)