Showing how to pass Vert.x Clustering parameters using the JavaExec gradle task type

build.gradle

task runExecutableJar(type: JavaExec) {
  // Executable jars can have only _one_ jar on the classpath.
  classpath = files(target/cluster-1.0-SNAPSHOT.jar)

  // 'main' does not need to be specified

  // arguments to pass to the application
  args [
    '-cluster',
    '-cluster-host',
    '${cluster.ip}'
  ]
  
  jvmArgs [
    '-Djava.net.preferIPv4Stack=true',
    '-Djgroups.tcp.address=${cluster.ip}',
    '-Djgroups.mping.mcast_addr=239.5.5.5'
  ]
}