initial commit for pySparkStreaming

core/pom.xml

@@ -21,7 +21,11 @@
   <parent>
     <groupId>org.apache.spark</groupId>
     <artifactId>spark-parent</artifactId>
+<<<<<<< HEAD
     <version>1.2.0-SNAPSHOT</version>
+=======
+    <version>1.0.0</version>
+>>>>>>> initial commit for pySparkStreaming
     <relativePath>../pom.xml</relativePath>
   </parent>
 

core/src/main/scala/org/apache/spark/api/python/PythonRDD.scala

@@ -288,7 +288,7 @@ private class PythonException(msg: String, cause: Exception) extends RuntimeExce
  * Form an RDD[(Array[Byte], Array[Byte])] from key-value pairs returned from Python.
  * This is used by PySpark's shuffle operations.
  */
-private class PairwiseRDD(prev: RDD[Array[Byte]]) extends
+private[spark] class PairwiseRDD(prev: RDD[Array[Byte]]) extends
   RDD[(Long, Array[Byte])](prev) {
   override def getPartitions = prev.partitions
   override def compute(split: Partition, context: TaskContext) =

core/src/main/scala/org/apache/spark/deploy/PythonRunner.scala

@@ -57,6 +57,7 @@ object PythonRunner {
     val builder = new ProcessBuilder(Seq(pythonExec, "-u", formattedPythonFile) ++ otherArgs)
     val env = builder.environment()
     env.put("PYTHONPATH", pythonPath)
+    env.put("PYSPARK_PYTHON", pythonExec)
     env.put("PYSPARK_GATEWAY_PORT", "" + gatewayServer.getListeningPort)
     builder.redirectErrorStream(true) // Ugly but needed for stdout and stderr to synchronize
     val process = builder.start()

examples/src/main/python/streaming/wordcount.py

@@ -0,0 +1,22 @@
+import sys
+from operator import add
+
+from pyspark.streaming.context import StreamingContext
+from pyspark.streaming.duration import *
+
+if __name__ == "__main__":
+    if len(sys.argv) != 2:
+        print >> sys.stderr, "Usage: wordcount <directory>"
+        exit(-1)
+    ssc = StreamingContext(appName="PythonStreamingWordCount", duration=Seconds(1))
+
+    lines = ssc.textFileStream(sys.argv[1])
+    fm_lines = lines.flatMap(lambda x: x.split(" "))
+    filtered_lines = fm_lines.filter(lambda line: "Spark" in line)
+    mapped_lines = fm_lines.map(lambda x: (x, 1))
+
+    fm_lines.pyprint()
+    filtered_lines.pyprint()
+    mapped_lines.pyprint()
+    ssc.start()
+    ssc.awaitTermination()

python/pyspark/java_gateway.py

@@ -108,6 +108,9 @@ def run(self):
     java_import(gateway.jvm, "org.apache.spark.SparkConf")
     java_import(gateway.jvm, "org.apache.spark.api.java.*")
     java_import(gateway.jvm, "org.apache.spark.api.python.*")
+    java_import(gateway.jvm, "org.apache.spark.streaming.*")
+    java_import(gateway.jvm, "org.apache.spark.streaming.api.java.*")
+    java_import(gateway.jvm, "org.apache.spark.streaming.api.python.*")
     java_import(gateway.jvm, "org.apache.spark.mllib.api.python.*")
     java_import(gateway.jvm, "org.apache.spark.sql.SQLContext")
     java_import(gateway.jvm, "org.apache.spark.sql.hive.HiveContext")

python/pyspark/streaming/__init__.py

@@ -0,0 +1 @@
+__author__ = 'ktakagiw'

python/pyspark/streaming/context.py

@@ -0,0 +1,133 @@
+__author__ = 'ktakagiw'
+
+
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+import os
+import shutil
+import sys
+from threading import Lock
+from tempfile import NamedTemporaryFile
+
+from pyspark import accumulators
+from pyspark.accumulators import Accumulator
+from pyspark.broadcast import Broadcast
+from pyspark.conf import SparkConf
+from pyspark.files import SparkFiles
+from pyspark.java_gateway import launch_gateway
+from pyspark.serializers import PickleSerializer, BatchedSerializer, UTF8Deserializer
+from pyspark.storagelevel import StorageLevel
+from pyspark.rdd import RDD
+from pyspark.context import SparkContext
+
+from py4j.java_collections import ListConverter
+
+from pyspark.streaming.dstream import DStream
+
+class StreamingContext(object):
+    """
+    Main entry point for Spark functionality. A StreamingContext represents the
+    connection to a Spark cluster, and can be used to create L{RDD}s and
+    broadcast variables on that cluster.
+    """
+
+    def __init__(self, master=None, appName=None, sparkHome=None, pyFiles=None,
+        environment=None, batchSize=1024, serializer=PickleSerializer(), conf=None,
+        gateway=None, duration=None):
+        """
+        Create a new StreamingContext. At least the master and app name and duration
+        should be set, either through the named parameters here or through C{conf}.
+
+        @param master: Cluster URL to connect to
+               (e.g. mesos://host:port, spark://host:port, local[4]).
+        @param appName: A name for your job, to display on the cluster web UI.
+        @param sparkHome: Location where Spark is installed on cluster nodes.
+        @param pyFiles: Collection of .zip or .py files to send to the cluster
+               and add to PYTHONPATH.  These can be paths on the local file
+               system or HDFS, HTTP, HTTPS, or FTP URLs.
+        @param environment: A dictionary of environment variables to set on
+               worker nodes.
+        @param batchSize: The number of Python objects represented as a single
+               Java object.  Set 1 to disable batching or -1 to use an
+               unlimited batch size.
+        @param serializer: The serializer for RDDs.
+        @param conf: A L{SparkConf} object setting Spark properties.
+        @param gateway: Use an existing gateway and JVM, otherwise a new JVM
+               will be instatiated.
+        @param duration: A L{Duration} Duration for SparkStreaming
+
+        """
+        # Create the Python Sparkcontext
+        self._sc = SparkContext(master=master, appName=appName, sparkHome=sparkHome,
+                        pyFiles=pyFiles, environment=environment, batchSize=batchSize,
+                        serializer=serializer, conf=conf, gateway=gateway)
+        self._jvm = self._sc._jvm
+        self._jssc = self._initialize_context(self._sc._jsc, duration._jduration)
+
+    # Initialize StremaingContext in function to allow subclass specific initialization
+    def _initialize_context(self, jspark_context, jduration):
+        return self._jvm.JavaStreamingContext(jspark_context, jduration)
+
+    def actorStream(self, props, name, storageLevel, supervisorStrategy):
+        raise NotImplementedError
+
+    def addStreamingListener(self, streamingListener):
+        raise NotImplementedError
+
+    def awaitTermination(self, timeout=None):
+        if timeout:
+            self._jssc.awaitTermination(timeout)
+        else:
+            self._jssc.awaitTermination()
+
+    def checkpoint(self, directory):
+        raise NotImplementedError
+
+    def fileStream(self, directory, filter=None, newFilesOnly=None):
+        raise NotImplementedError
+
+    def networkStream(self, receiver):
+        raise NotImplementedError
+
+    def queueStream(self, queue, oneAtATime=True, defaultRDD=None):
+        raise NotImplementedError
+
+    def rawSocketStream(self, hostname, port, storagelevel):
+        raise NotImplementedError
+
+    def remember(self, duration):
+        raise NotImplementedError
+
+    def socketStream(hostname, port, converter,storageLevel):
+        raise NotImplementedError
+
+    def start(self):
+        self._jssc.start()
+
+    def stop(self, stopSparkContext=True):
+        raise NotImplementedError
+
+    def textFileStream(self, directory):
+        return DStream(self._jssc.textFileStream(directory), self, UTF8Deserializer())
+
+    def transform(self, seq):
+        raise NotImplementedError
+
+    def union(self, seq):
+        raise NotImplementedError
+