[SPARK-5155] [PYSPARK] [STREAMING] Mqtt streaming support in Python

This PR is based on #4229, thanks prabeesh.

Closes #4229

Author: Prabeesh K <prabsmails@gmail.com>
Author: zsxwing <zsxwing@gmail.com>
Author: prabs <prabsmails@gmail.com>
Author: Prabeesh K <prabeesh.k@namshi.com>

Closes #7833 from zsxwing/pr4229 and squashes the following commits:

9570bec [zsxwing] Fix the variable name and check null in finally
4a9c79e [zsxwing] Fix pom.xml indentation
abf5f18 [zsxwing] Merge branch 'master' into pr4229
935615c [zsxwing] Fix the flaky MQTT tests
47278c5 [zsxwing] Include the project class files
478f844 [zsxwing] Add unpack
5f8a1d4 [zsxwing] Make the maven build generate the test jar for Python MQTT tests
734db99 [zsxwing] Merge branch 'master' into pr4229
126608a [Prabeesh K] address the comments
b90b709 [Prabeesh K] Merge pull request #1 from zsxwing/pr4229
d07f454 [zsxwing] Register StreamingListerner before starting StreamingContext; Revert unncessary changes; fix the python unit test
a6747cb [Prabeesh K] wait for starting the receiver before publishing data
87fc677 [Prabeesh K] address the comments:
97244ec [zsxwing] Make sbt build the assembly test jar for streaming mqtt
80474d1 [Prabeesh K] fix
1f0cfe9 [Prabeesh K] python style fix
e1ee016 [Prabeesh K] scala style fix
a5a8f9f [Prabeesh K] added Python test
9767d82 [Prabeesh K] implemented Python-friendly class
a11968b [Prabeesh K] fixed python style
795ec27 [Prabeesh K] address comments
ee387ae [Prabeesh K] Fix assembly jar location of mqtt-assembly
3f4df12 [Prabeesh K] updated version
b34c3c1 [prabs] adress comments
3aa7fff [prabs] Added Python streaming mqtt word count example
b7d42ff [prabs] Mqtt streaming support in Python

1 files changed, 9 insertions, 3 deletions

diff --git a/project/SparkBuild.scala b/project/SparkBuild.scala
index 9a33baa7c6..41a85fa9de 100644
--- a/project/SparkBuild.scala
+++ b/project/SparkBuild.scala
@@ -45,8 +45,8 @@ object BuildCommons {
     sparkKinesisAsl) = Seq("yarn", "yarn-stable", "java8-tests", "ganglia-lgpl",
     "kinesis-asl").map(ProjectRef(buildLocation, _))
 
-  val assemblyProjects@Seq(assembly, examples, networkYarn, streamingFlumeAssembly, streamingKafkaAssembly, streamingKinesisAslAssembly) =
-    Seq("assembly", "examples", "network-yarn", "streaming-flume-assembly", "streaming-kafka-assembly", "streaming-kinesis-asl-assembly")
+  val assemblyProjects@Seq(assembly, examples, networkYarn, streamingFlumeAssembly, streamingKafkaAssembly, streamingMqttAssembly, streamingKinesisAslAssembly) =
+    Seq("assembly", "examples", "network-yarn", "streaming-flume-assembly", "streaming-kafka-assembly", "streaming-mqtt-assembly", "streaming-kinesis-asl-assembly")
       .map(ProjectRef(buildLocation, _))
 
   val tools = ProjectRef(buildLocation, "tools")
@@ -212,6 +212,9 @@ object SparkBuild extends PomBuild {
   /* Enable Assembly for all assembly projects */
   assemblyProjects.foreach(enable(Assembly.settings))
 
+  /* Enable Assembly for streamingMqtt test */
+  enable(inConfig(Test)(Assembly.settings))(streamingMqtt)
+
   /* Package pyspark artifacts in a separate zip file for YARN. */
   enable(PySparkAssembly.settings)(assembly)
 
@@ -382,13 +385,16 @@ object Assembly {
         .getOrElse(SbtPomKeys.effectivePom.value.getProperties.get("hadoop.version").asInstanceOf[String])
     },
     jarName in assembly <<= (version, moduleName, hadoopVersion) map { (v, mName, hv) =>
-      if (mName.contains("streaming-flume-assembly") || mName.contains("streaming-kafka-assembly") || mName.contains("streaming-kinesis-asl-assembly")) {
+      if (mName.contains("streaming-flume-assembly") || mName.contains("streaming-kafka-assembly") || mName.contains("streaming-mqtt-assembly") || mName.contains("streaming-kinesis-asl-assembly")) {
         // This must match the same name used in maven (see external/kafka-assembly/pom.xml)
         s"${mName}-${v}.jar"
       } else {
         s"${mName}-${v}-hadoop${hv}.jar"
       }
     },
+    jarName in (Test, assembly) <<= (version, moduleName, hadoopVersion) map { (v, mName, hv) =>
+      s"${mName}-test-${v}.jar"
+    },
     mergeStrategy in assembly := {
       case PathList("org", "datanucleus", xs @ _*)             => MergeStrategy.discard
       case m if m.toLowerCase.endsWith("manifest.mf")          => MergeStrategy.discard