jenkinsfile-parallel-jobs

// Orig Ref From :: https://github.com/jenkinsci/pipeline-examples/blob/master/pipeline-examples/jobs-in-parallel/jobs_in_parallel.groovy

// in this array we'll place the jobs that we wish to run
def branches = [:]

//running the job 4 times concurrently
//the dummy parameter is for preventing mutation of the parameter before the execution of the closure.
//we have to assign it outside the closure or it will run the job multiple times with the same parameter "4"
//and jenkins will unite them into a single run of the job

for (int i = 0; i < 4; i++) {
  branches["branch${i}"] = {
//Parameters:
//param1 : an example string parameter for the triggered job.
//dummy: a parameter used to prevent triggering the job with the same parameters value. this parameter has to accept a different value
//each time the job is triggered.
    build job: 'test_jobs', parameters: [[$class: 'StringParameterValue', name: 'param1', value:
      'test_param'], [$class: 'StringParameterValue', name:'dummy', value: "${i}"]]
    }
}
parallel branches