def apps = "maven-parent,gcube-bom,gx-rest"
def applications = apps.split(",").findAll { it }.collect { it.trim() }
def environment  = env.ENVIRONMENT
def version      = env.VERSION
def jobs         = [:]

if (applications.size() < 1) {
    error("ERROR: APPLICATIONS must be a comma-delimited list of applications to build")
}

for (int i = 0; i < applications.size(); i++) {
    def app = applications[i]
    jobs["jobs-${app}"] = {
        node {
            stage("Build ${app}") {
                build "${app}"
            }
        }
    }
}
// the problem is with more than ONE parallel block
pipeline {
    agent any
    stages {
        stage('Build apps(s)') {
            steps {
                script {
                    parallel jobs
                }
            }
        }
        stage('Build apps(s) 2') {
                    steps {
                        script {
                            parallel jobs
                        }
                    }
                }
        stage('Build apps(s) 3') {
            steps {
                script {
                    parallel jobs
                }
            }
        }
    }
}