@GrabResolver(name='Paho', root='https://repo.eclipse.org/content/repositories/paho-releases/') @Grab(group='org.eclipse.paho', module='org.eclipse.paho.client.mqttv3', version='1.0.1', ext='jar') import org.eclipse.paho.client.mqttv3.MqttClient import org.eclipse.paho.client.mqttv3.persist.MqttDefaultFilePersistence String host = args[0] String tmpDir = System.getProperty("java.io.tmpdir") MqttDefaultFilePersistence dataStore1 = new MqttDefaultFilePersistence(tmpDir + "/client1") MqttClient client1 = new MqttClient("tcp://${host}:1883", "ConnectedClient", dataStore1) client1.connect() println "Client1 connected" println "Ok mate, done!" client1.disconnect() println "Client1 disconnected"