Groovy Training — Jenkins Pipeline Scripting & JVM Automation for DevOps

Why Groovy Matters in DevOps

Groovy is the scripting language of Jenkins Pipeline — the most widely deployed CI/CD automation server. Every Jenkinsfile is written in Groovy (declarative or scripted). Jenkins Shared Libraries are Groovy classes. The Jenkins Script Console runs Groovy. For DevOps engineers working with Jenkins at any scale, Groovy is not optional — it's the native language of pipeline automation. Beyond Jenkins, Groovy powers Gradle build scripts (Gradle's DSL is Groovy-based) and JVM automation tooling.

Who Should Attend

• DevOps engineers writing Jenkins pipelines and shared libraries
• Build/release engineers maintaining Jenkins infrastructure
• Java developers using Gradle and Jenkins
• Teams standardizing on Jenkins Pipeline as Code

Learning Outcomes

• Write declarative and scripted Jenkins pipelines in Groovy
• Build reusable Jenkins Shared Libraries with Groovy classes
• Use Groovy closures, collections, and string interpolation in pipeline scripts
• Design domain-specific languages (DSLs) in Groovy for pipeline configuration
• Write unit tests for Jenkins Shared Libraries with Spock and JenkinsPipelineUnit
• Understand Groovy's role in Gradle build scripts and JVM automation

Course Modules

1. Groovy Fundamentals — Syntax compared to Java. Dynamic typing. Closures. Collections. String interpolation (GString).
2. Groovy for Jenkins Pipeline — Declarative vs. scripted pipelines. Jenkinsfile structure. Groovy in pipeline steps.
3. Scripted Pipeline Deep Dive — node, stage, checkout, sh/bat. Programmatic pipeline logic. Loops and conditionals.
4. Jenkins Shared Libraries — Library structure (vars/, src/, resources/). Global variables. Custom steps. Configuration.
5. Advanced Groovy in Jenkins — CPS transformer. Serialization. Non-CPS code. Performance pitfalls. Best practices.
6. Testing Shared Libraries — Spock framework. JenkinsPipelineUnit. Mocking Jenkins objects. CI/CD for shared libraries.
7. Groovy Beyond Jenkins — Gradle build scripts. Groovy for JVM automation. Groovy scripts in CI/CD.
8. Capstone: Jenkins Pipeline Library — Build a complete shared library with unit tests for standardized CI/CD pipelines.

Hands-on Labs (14 total)

Write scripted Jenkins pipelines with Groovy. Build a shared library with custom pipeline steps. Use closures for parameterized pipeline logic. Write Spock unit tests for shared library functions. Debug CPS transformation issues. Design a DSL for team-specific pipeline configuration.

CI/CD Examples

• Jenkins Shared Library providing standardized build, test, deploy steps for 50+ teams
• Groovy-based pipeline configuration DSL that abstracts CI/CD complexity for application teams
• Automated unit testing of pipeline code in CI/CD before deployment to Jenkins

Related Courses

See Jenkins Training, Python for DevOps, and DevOps Engineering.