Added publisher and subscriber using mqtt-client lib from FuseSource

tools_scripts/fuse_publisher.groovy

@@ -0,0 +1,27 @@
+@Grab(group='org.fusesource.mqtt-client', module='mqtt-client', version='1.5')
+
+import java.net.URISyntaxException
+
+import org.fusesource.mqtt.client.BlockingConnection
+import org.fusesource.mqtt.client.MQTT
+import org.fusesource.mqtt.client.QoS
+
+String host = args[0]
+
+MQTT mqtt = new MQTT()
+//mqtt.setHost("test.mosquitto.org", 1883);
+mqtt.setHost(host, 1883)
+BlockingConnection connection = mqtt.blockingConnection()
+connection.connect()
+
+print "publishing.."
+long startTime = System.currentTimeMillis()
+(1..100000).each {
+    connection.publish("/topic", 'Hello world!!'.bytes, QoS.AT_MOST_ONCE, false)
+}
+connection.publish('/exit', 'Exit'.bytes, QoS.AT_MOST_ONCE, false)
+long stopTime = System.currentTimeMillis()
+long spentTime = stopTime -startTime
+println "published in ${spentTime} ms"
+connection.disconnect()
+println "disconnected"