Github user prabeesh commented on a diff in the pull request: https://github.com/apache/spark/pull/4178#discussion_r24352985 --- Diff: examples/src/main/scala/org/apache/spark/examples/streaming/MQTTWordCount.scala --- @@ -42,25 +40,33 @@ object MQTTPublisher { StreamingExamples.setStreamingLogLevels() val Seq(brokerUrl, topic) = args.toSeq + + var client: MqttClient = null try { - var peristance:MqttClientPersistence =new MqttDefaultFilePersistence("/tmp") - client = new MqttClient(brokerUrl, MqttClient.generateClientId(), peristance) + val persistence = new MemoryPersistence() + client = new MqttClient(brokerUrl, MqttClient.generateClientId(), persistence) + + client.connect() + + val msgtopic = client.getTopic(topic) + val msgContent = "hello mqtt demo for spark streaming" + val message = new MqttMessage(msgContent.getBytes("utf-8")) + + while (true) { + try { + msgtopic.publish(message) + println("Published data. topic: %s; Message: %s".format(msgtopic.getName(), message)) + } catch { + case e: MqttException if e.getReasonCode == MqttException.REASON_CODE_MAX_INFLIGHT => --- End diff -- @dragos Please review this
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