public void TestStreamingContext()
{
var ssc = new StreamingContext(new SparkContext("", ""), 1);
Assert.IsNotNull((ssc.streamingContextProxy as MockStreamingContextProxy));
ssc.Start();
ssc.Remember(1);
ssc.Checkpoint(Path.GetTempPath());
var textFile = ssc.TextFileStream(Path.GetTempPath());
Assert.IsNotNull(textFile.DStreamProxy);
var socketStream = ssc.SocketTextStream(IPAddress.Loopback.ToString(), 12345);
Assert.IsNotNull(socketStream.DStreamProxy);
var kafkaStream = KafkaUtils.CreateStream(ssc, IPAddress.Loopback + ":2181", "testGroupId", new Dictionary<string, int> { { "testTopic1", 1 } }, new Dictionary<string, string>());
Assert.IsNotNull(kafkaStream.DStreamProxy);
var directKafkaStream = KafkaUtils.CreateDirectStream(ssc, new List<string> { "testTopic2" }, new Dictionary<string, string>(), new Dictionary<string, long>());
Assert.IsNotNull(directKafkaStream.DStreamProxy);
var directKafkaStreamWithRepartition = KafkaUtils.CreateDirectStreamWithRepartition(ssc, new List<string> { "testTopic3" }, new Dictionary<string, string>(), new Dictionary<string, long>(), 10);
Assert.IsNotNull(directKafkaStreamWithRepartition.DStreamProxy);
var union = ssc.Union(textFile, socketStream);
Assert.IsNotNull(union.DStreamProxy);
ssc.AwaitTermination();
ssc.Stop();
}
public void TestStreamingContext()
{
var ssc = new StreamingContext(new SparkContext("", ""), 1000);
Assert.IsNotNull((ssc.streamingContextProxy as MockStreamingContextProxy));
ssc.Start();
ssc.Remember(1000);
ssc.Checkpoint(Path.GetTempPath());
var textFile = ssc.TextFileStream(Path.GetTempPath());
Assert.IsNotNull(textFile.DStreamProxy);
var socketStream = ssc.SocketTextStream("127.0.0.1", 12345);
Assert.IsNotNull(socketStream.DStreamProxy);
var kafkaStream = ssc.KafkaStream("127.0.0.1:2181", "testGroupId", new Dictionary<string, int> { { "testTopic1", 1 } }, new Dictionary<string, string>());
Assert.IsNotNull(kafkaStream.DStreamProxy);
var directKafkaStream = ssc.DirectKafkaStream(new List<string> { "testTopic2" }, new Dictionary<string, string>(), new Dictionary<string, long>());
Assert.IsNotNull(directKafkaStream.DStreamProxy);
var union = ssc.Union(textFile, socketStream);
Assert.IsNotNull(union.DStreamProxy);
ssc.AwaitTermination();
ssc.Stop();
}
internal static void DStreamConstantDStreamSample()
{
var sc = SparkCLRSamples.SparkContext;
var ssc = new StreamingContext(sc, 2000L);
const int count = 100;
const int partitions = 2;
// create the RDD
var seedRDD = sc.Parallelize(Enumerable.Range(0, 100), 2);
var dstream = new ConstantInputDStream<int>(seedRDD, ssc);
dstream.ForeachRDD((time, rdd) =>
{
long batchCount = rdd.Count();
int numPartitions = rdd.GetNumPartitions();
Console.WriteLine("-------------------------------------------");
Console.WriteLine("Time: {0}", time);
Console.WriteLine("-------------------------------------------");
Console.WriteLine("Count: " + batchCount);
Console.WriteLine("Partitions: " + numPartitions);
Assert.AreEqual(count, batchCount);
Assert.AreEqual(partitions, numPartitions);
});
ssc.Start();
ssc.AwaitTermination();
}
private static void DStreamReduceByKeyAndWindowSample()
{
count = 0;
const long bacthIntervalMs = 2000; // batch interval is in milliseconds
const int windowDuration = 26; // window duration in seconds
const int numPartitions = 2;
var sc = SparkCLRSamples.SparkContext;
var ssc = new StreamingContext(sc, bacthIntervalMs);
// create the RDD
var seedRDD = sc.Parallelize(Enumerable.Range(0, 100), numPartitions);
var numbers = new ConstantInputDStream<int>(seedRDD, ssc);
var pairs = numbers.Map(n => new KeyValuePair<int, int>(n % numPartitions, n));
var reduced = pairs.ReduceByKeyAndWindow(
(int x, int y) => (x + y),
(int x, int y) => (x - y),
windowDuration,
slideDuration,
numPartitions
);
reduced.ForeachRDD((time, rdd) =>
{
count++;
var taken = rdd.Collect();
int partitions = rdd.GetNumPartitions();
Console.WriteLine("-------------------------------------------");
Console.WriteLine("Time: {0}", time);
Console.WriteLine("-------------------------------------------");
Console.WriteLine("Batch: " + count);
Console.WriteLine("Count: " + taken.Length);
Console.WriteLine("Partitions: " + partitions);
Assert.AreEqual(taken.Length, 2);
Assert.AreEqual(partitions, numPartitions);
foreach (object record in taken)
{
KeyValuePair<int, int> sum = (KeyValuePair<int, int>)record;
Console.WriteLine("Key: {0}, Value: {1}", sum.Key, sum.Value);
// when batch count reaches window size, sum of even/odd number stay at windowDuration / slideDuration * (2450, 2500) respectively
Assert.AreEqual(sum.Value, (count > windowDuration / slideDuration ? windowDuration : count * slideDuration) / (bacthIntervalMs / 1000) * (sum.Key == 0 ? 2450 : 2500));
}
});
ssc.Start();
ssc.AwaitTermination();
}
internal static void DStreamCSharpInputSample()
{
const int numPartitions = 5;
var sc = SparkCLRSamples.SparkContext;
var ssc = new StreamingContext(sc, 2000L); // batch interval is in milliseconds
var inputDStream = CSharpInputDStreamUtils.CreateStream<string>(
ssc,
numPartitions,
(double time, int pid) =>
{
var list = new List<string>() { string.Format("PluggableInputDStream-{0}-{1}", pid, time) };
return list.AsEnumerable();
});
inputDStream.ForeachRDD((time, rdd) =>
{
var taken = rdd.Collect();
int partitions = rdd.GetNumPartitions();
Console.WriteLine("-------------------------------------------");
Console.WriteLine("Time: {0}", time);
Console.WriteLine("-------------------------------------------");
Console.WriteLine("Count: " + taken.Length);
Console.WriteLine("Partitions: " + partitions);
foreach (object record in taken)
{
Console.WriteLine(record);
}
});
ssc.Start();
ssc.AwaitTermination();
}
public void TestStreamingContext()
{
var ssc = new StreamingContext(new SparkContext("", ""), 1000L);
Assert.IsNotNull((ssc.streamingContextProxy as MockStreamingContextProxy));
ssc.Start();
ssc.Remember(1000L);
ssc.Checkpoint(Path.GetTempPath());
var textFile = ssc.TextFileStream(Path.GetTempPath());
Assert.IsNotNull(textFile.DStreamProxy);
var socketStream = ssc.SocketTextStream(IPAddress.Loopback.ToString(), 12345);
Assert.IsNotNull(socketStream.DStreamProxy);
var kafkaStream = KafkaUtils.CreateStream(ssc, IPAddress.Loopback + ":2181", "testGroupId", new Dictionary<string, int> { { "testTopic1", 1 } }, new Dictionary<string, string>());
Assert.IsNotNull(kafkaStream.DStreamProxy);
var directKafkaStream = KafkaUtils.CreateDirectStream(ssc, new List<string> { "testTopic2" }, new Dictionary<string, string>(), new Dictionary<string, long>());
Assert.IsNotNull(directKafkaStream.DStreamProxy);
ssc.SparkContext.SparkConf.Set("spark.mobius.streaming.kafka.numPartitions.testTopic3", "10");
var directKafkaStreamWithRepartition = KafkaUtils.CreateDirectStream(ssc, new List<string> { "testTopic3" }, new Dictionary<string, string>(), new Dictionary<string, long>());
Assert.IsNotNull(directKafkaStreamWithRepartition.DStreamProxy);
var directKafkaStreamWithRepartitionAndReadFunc = KafkaUtils.CreateDirectStream(
ssc,
new List<string> { "testTopic3" },
new Dictionary<string, string>(), new Dictionary<string, long>(),
(int pid, IEnumerable<KeyValuePair<byte[], byte[]>> input) => { return input; });
Assert.IsNotNull(directKafkaStreamWithRepartitionAndReadFunc);
ssc.SparkContext.SparkConf.Set("spark.mobius.streaming.kafka.numReceivers", "10");
var directKafkaReceiver = KafkaUtils.CreateDirectStream(
ssc,
new List<string> { "testTopic3" },
new Dictionary<string, string>(), new Dictionary<string, long>(),
(int pid, IEnumerable<KeyValuePair<byte[], byte[]>> input) => { return input; });
Assert.IsNotNull(directKafkaReceiver.DStreamProxy);
var union = ssc.Union(textFile, socketStream);
Assert.IsNotNull(union.DStreamProxy);
ssc.AwaitTermination();
ssc.Stop();
}