How to use Jenkins Job DSL API in custom groovy classes

Question

Is something like this possible, i.e. using the JobDSL API from a class outside the main DSL script?

//main_jobdsl_script.groovy:
new JobCreator().createJob()

//JobCreator.groovy:
job("new-job") {
  steps {
    batchFile("Hello World")
  }
}

When running it I get the error

13:03:18 ERROR: No signature of method: JobCreator.job() is applicable for argument types:
(org.codehaus.groovy.runtime.GStringImpl, StartJobCreator$_createJob_closure1)
values: ["new-job", de.dbh.jobcreation.StartJobCreator$_createStartJob_closure1@374d293]

I want to avoid that the main-script gets too big and cluttered and rather divide the code into several scripts / classes.

Answer 1

Yes, it is possible. The current script has access to all API methods, so you need to pass it to the custom class.

//main_jobdsl_script.groovy:
new JobCreator(this).createJob()

//JobCreator.groovy:

class JobCreator {

    private final Object context

    JobCreator(Object context) {
        this.context = context
    }

    void createJob() {
        context.job('new-job') {
            steps {
                batchFile('Hello World')
            }
        }
    }
}