Github user tdas commented on a diff in the pull request:
https://github.com/apache/spark/pull/3947#discussion_r22707523
--- Diff:
examples/src/main/scala/org/apache/spark/examples/streaming/MQTTWordCount.scala
---
@@ -42,25 +41,34 @@ object MQTTPublisher {
StreamingExamples.setStreamingLogLevels()
val Seq(brokerUrl, topic) = args.toSeq
+ val tempDir = Utils.createTempDir()
+
+ var client: MqttClient = null
try {
- var peristance:MqttClientPersistence =new
MqttDefaultFilePersistence("/tmp")
+ val peristance:MqttClientPersistence = new
MqttDefaultFilePersistence(tempDir.getAbsolutePath)
client = new MqttClient(brokerUrl, MqttClient.generateClientId(),
peristance)
- } catch {
- case e: MqttException => println("Exception Caught: " + e)
- }
- client.connect()
+ client.connect()
+
+ val msgtopic: MqttTopic = client.getTopic(topic)
--- End diff --
Same comment as above. `val msgTopic = client.getTopic(topic)`
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