Jenkins Plugin Development With Gradle And Groovy

Jun 25, 2015Download as PPTX, PDF3 likes2,185 views

The document discusses plugin development for Jenkins using Gradle and Groovy. It presents Gradle as a build tool for Jenkins plugins that can generate the plugin file and deploy it. Groovy is highlighted as a programming language that can be used along with Java for plugin development. Spock is recommended as a testing framework that works with the constraints of Groovy 1.8 used in Jenkins. Examples of building, testing, and deploying plugins with Gradle and Groovy are also provided.

Plugin Development with Gradle and Groovy
Daniel Spilker – CoreMedia AG

#jenkinsconf
Plugin Development – It‘s Your Choice
• Build Tool
– Maven, Gradle, …
• Programming Language
– Java, Groovy, Ruby, Python, …
• Testing
– JUnit, Spock, …

#jenkinsconf
Gradle JPI Plugin
• Builds the Jenkins plugin file (HPI / JPI)
• Can be combined with other Gradle plugins
• Hooks into the standard Gradle tasks
• Recommended prerequisites
– Java 7
– Gradle 2.3

#jenkinsconf
Example
buildscript { … }
apply plugin: 'org.jenkins-ci.jpi'
group = 'org.jenkins-ci.plugins'
version = '0.0.1-SNAPSHOT'
description = 'A description of your plugin'
jenkinsPlugin {
coreVersion = '1.580'
displayName = 'Hello World'
url = 'http://wiki.jenkins-ci.org/display/JENKINS/Hello+World'
gitHubUrl = 'https://github.com/jenkinsci/hello-world-plugin'
developers { … }
}

#jenkinsconf
Directory Structure
hello-world-plugin
+---build.gradle
---src
+---main
| +---groovy
| ---resources
---test
+---groovy
---resources

#jenkinsconf
Gradle Tasks
• gradle server
– Start a Jenkins instance with the plugin installed for
manual testing
• gradle jpi
– Build the Jenkins plugin file
• gradle publish
– Deploy your plugin to the Jenkins Maven repository to
be included in the Update Center

#jenkinsconf
Further Information
• Documentation
https://wiki.jenkins-ci.org/display/JENKINS/Gradle+JPI+Plugin
• Issue Tracker
https://issues.jenkins-ci.org/browse/JENKINS/component/16321
• Jenkins Developer Mailing List
https://groups.google.com/forum/#!forum/jenkinsci-dev
• Example
https://github.com/jenkinsci/job-dsl-plugin

#jenkinsconf
Groovy
• All documentation and examples about plugin
development with Java also apply to Groovy
• Jenkins comes with Groovy 1.8

#jenkinsconf
Example
class HelloWorldBuilder extends Builder {
final String name
@DataBoundConstructor
HelloWorldBuilder(String name) { … }
@Override
boolean perform(…) {
listener.logger.println("Hello, ${name}!")
true
}
}

#jenkinsconf
Further Information
• Groovy
http://www.groovy-lang.org/
http://www.groovy-lang.org/groovy-weekly.html
http://glaforge.appspot.com/article/groovy-presentations-at-conferences
• Developing Plugins
https://wiki.jenkins-ci.org/display/JENKINS/Extend+Jenkins
• Example
https://github.com/jenkinsci/hello-world-groovy-plugin

#jenkinsconf
Spock Framework
• Spock 0.7 must be used due to Groovy 1.8 constraint
• Gradle dependency declaration
dependencies {
testCompile 'org.spockframework:spock-core:0.7-groovy-1.8'
}
• The Jenkins test harness can be used
@Rule
JenkinsRule jenkinsRule = new JenkinsRule()

#jenkinsconf
Example
class ExampleSpec extends Specification {
@Rule
JenkinsRule jenkinsRule = new JenkinsRule()
def 'some example test'() {
setup:
FreeStyleProject job = jenkinsRule.createFreeStyleProject('seed')
when:
FreeStyleBuild freeStyleBuild = job.scheduleBuild2(0).get()
then:
freeStyleBuild.result == SUCCESS
}
}

#jenkinsconf
Further Information
• Documentation
http://docs.spockframework.org/
• Testing plugins
https://wiki.jenkins-ci.org/display/JENKINS/Unit+Test

#jenkinsconf
Summary – It‘s Your Choice
• Build Tool
– Maven, Gradle, …
• Programming Language
– Java, Groovy, Ruby, Python, …
• Views
– Jelly, Groovy
• Testing
– JUnit, Spock, …

#jenkinsconf
Thank You
Daniel Spilker
daniel.spilker@coremedia.com
@daspilker
We‘re hiring
www.coremedia.com
@CoreMediaMinds

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This SlideShare presentation is from our May webinar, “Not So Common Memory Leaks & How to Fix Them?”, where we explored lesser-known memory leak patterns in Java applications. Unlike typical leaks, subtle issues such as thread local misuse, inner class references, uncached collections, and misbehaving frameworks often go undetected and gradually degrade performance. This deck provides in-depth insights into identifying these hidden leaks using advanced heap analysis and profiling techniques, along with real-world case studies and practical solutions. Ideal for developers and performance engineers aiming to deepen their understanding of Java memory management and improve application stability.

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Migrating from Lotus Notes to Outlook can be a complex and time-consuming task, especially when dealing with large volumes of NSF emails. This presentation provides a complete guide on how to batch export Lotus Notes NSF emails to Outlook PST format quickly and securely. It highlights the challenges of manual methods, the benefits of using an automated tool, and introduces eSoftTools NSF to PST Converter Software — a reliable solution designed to handle bulk email migrations efficiently. Learn about the software’s key features, step-by-step export process, system requirements, and how it ensures 100% data accuracy and folder structure preservation during migration. Make your email transition smoother, safer, and faster with the right approach. Read More:- https://www.esofttools.com/nsf-to-pst-converter.html

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Exceptions allow developers to handle error cases expected to occur infrequently. Ideally, good test suites should test both normal and exceptional behaviors to catch more bugs and avoid regressions. While current research analyzes exceptions that propagate to tests, it does not explore other exceptions that do not reach the tests. In this paper, we provide an empirical study to explore how frequently exceptional behaviors are tested in real-world systems. We consider both exceptions that propagate to tests and the ones that do not reach the tests. For this purpose, we run an instrumented version of test suites, monitor their execution, and collect information about the exceptions raised at runtime. We analyze the test suites of 25 Python systems, covering 5,372 executed methods, 17.9M calls, and 1.4M raised exceptions. We find that 21.4% of the executed methods do raise exceptions at runtime. In methods that raise exceptions, on the median, 1 in 10 calls exercise exceptional behaviors. Close to 80% of the methods that raise exceptions do so infrequently, but about 20% raise exceptions more frequently. Finally, we provide implications for researchers and practitioners. We suggest developing novel tools to support exercising exceptional behaviors and refactoring expensive try/except blocks. We also call attention to the fact that exception-raising behaviors are not necessarily “abnormal” or rare.

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Jenkins Plugin Development With Gradle And Groovy

1. Plugin Development with Gradle and Groovy Daniel Spilker – CoreMedia AG

2. #jenkinsconf Plugin Development – It‘s Your Choice • Build Tool – Maven, Gradle, … • Programming Language – Java, Groovy, Ruby, Python, … • Testing – JUnit, Spock, …

3. #jenkinsconf Plugin Development – It‘s Your Choice • Build Tool – Maven, Gradle, … • Programming Language – Java, Groovy, Ruby, Python, … • Testing – JUnit, Spock, …

4. #jenkinsconf Gradle JPI Plugin

5. #jenkinsconf Gradle JPI Plugin • Builds the Jenkins plugin file (HPI / JPI) • Can be combined with other Gradle plugins • Hooks into the standard Gradle tasks • Recommended prerequisites – Java 7 – Gradle 2.3

6. #jenkinsconf Example buildscript { … } apply plugin: 'org.jenkins-ci.jpi' group = 'org.jenkins-ci.plugins' version = '0.0.1-SNAPSHOT' description = 'A description of your plugin' jenkinsPlugin { coreVersion = '1.580' displayName = 'Hello World' url = 'http://wiki.jenkins-ci.org/display/JENKINS/Hello+World' gitHubUrl = 'https://github.com/jenkinsci/hello-world-plugin' developers { … } }

7. #jenkinsconf Directory Structure hello-world-plugin +---build.gradle ---src +---main | +---groovy | ---resources ---test +---groovy ---resources

8. #jenkinsconf Gradle Tasks • gradle server – Start a Jenkins instance with the plugin installed for manual testing • gradle jpi – Build the Jenkins plugin file • gradle publish – Deploy your plugin to the Jenkins Maven repository to be included in the Update Center

9. #jenkinsconf Further Information • Documentation https://wiki.jenkins-ci.org/display/JENKINS/Gradle+JPI+Plugin • Issue Tracker https://issues.jenkins-ci.org/browse/JENKINS/component/16321 • Jenkins Developer Mailing List https://groups.google.com/forum/#!forum/jenkinsci-dev • Example https://github.com/jenkinsci/job-dsl-plugin

10. #jenkinsconf Groovy

11. #jenkinsconf Groovy • All documentation and examples about plugin development with Java also apply to Groovy • Jenkins comes with Groovy 1.8

12. #jenkinsconf Example class HelloWorldBuilder extends Builder { final String name @DataBoundConstructor HelloWorldBuilder(String name) { … } @Override boolean perform(…) { listener.logger.println("Hello, ${name}!") true } }

13. #jenkinsconf Further Information • Groovy http://www.groovy-lang.org/ http://www.groovy-lang.org/groovy-weekly.html http://glaforge.appspot.com/article/groovy-presentations-at-conferences • Developing Plugins https://wiki.jenkins-ci.org/display/JENKINS/Extend+Jenkins • Example https://github.com/jenkinsci/hello-world-groovy-plugin

14. #jenkinsconf Spock Framework

15. #jenkinsconf Spock Framework • Spock 0.7 must be used due to Groovy 1.8 constraint • Gradle dependency declaration dependencies { testCompile 'org.spockframework:spock-core:0.7-groovy-1.8' } • The Jenkins test harness can be used @Rule JenkinsRule jenkinsRule = new JenkinsRule()

16. #jenkinsconf Example class ExampleSpec extends Specification { @Rule JenkinsRule jenkinsRule = new JenkinsRule() def 'some example test'() { setup: FreeStyleProject job = jenkinsRule.createFreeStyleProject('seed') when: FreeStyleBuild freeStyleBuild = job.scheduleBuild2(0).get() then: freeStyleBuild.result == SUCCESS } }

17. #jenkinsconf Further Information • Documentation http://docs.spockframework.org/ • Testing plugins https://wiki.jenkins-ci.org/display/JENKINS/Unit+Test

18. #jenkinsconf Summary – It‘s Your Choice • Build Tool – Maven, Gradle, … • Programming Language – Java, Groovy, Ruby, Python, … • Views – Jelly, Groovy • Testing – JUnit, Spock, …

19. #jenkinsconf Thank You Daniel Spilker [email protected] @daspilker We‘re hiring www.coremedia.com @CoreMediaMinds