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/*
* 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.
*/
package org.apache.spark.streaming
import akka.actor.Actor
import akka.actor.IO
import akka.actor.IOManager
import akka.actor.Props
import akka.util.ByteString
import java.io.{File, BufferedWriter, OutputStreamWriter}
import java.net.{InetSocketAddress, SocketException, ServerSocket}
import java.nio.charset.Charset
import java.util.concurrent.{Executors, TimeUnit, ArrayBlockingQueue}
import java.util.concurrent.atomic.AtomicInteger
import scala.collection.mutable.{SynchronizedBuffer, ArrayBuffer}
import com.google.common.io.Files
import org.scalatest.BeforeAndAfter
import org.apache.spark.Logging
import org.apache.spark.storage.StorageLevel
import org.apache.spark.streaming.util.ManualClock
import org.apache.spark.util.Utils
import org.apache.spark.streaming.receiver.{ActorHelper, Receiver}
class InputStreamsSuite extends TestSuiteBase with BeforeAndAfter {
val testPort = 9999
test("socket input stream") {
// Start the server
val testServer = new TestServer()
testServer.start()
// Set up the streaming context and input streams
val ssc = new StreamingContext(conf, batchDuration)
val networkStream = ssc.socketTextStream("localhost", testServer.port, StorageLevel.MEMORY_AND_DISK)
val outputBuffer = new ArrayBuffer[Seq[String]] with SynchronizedBuffer[Seq[String]]
val outputStream = new TestOutputStream(networkStream, outputBuffer)
def output = outputBuffer.flatMap(x => x)
outputStream.register()
ssc.start()
// Feed data to the server to send to the network receiver
val clock = ssc.scheduler.clock.asInstanceOf[ManualClock]
val input = Seq(1, 2, 3, 4, 5)
val expectedOutput = input.map(_.toString)
Thread.sleep(1000)
for (i <- 0 until input.size) {
testServer.send(input(i).toString + "\n")
Thread.sleep(500)
clock.addToTime(batchDuration.milliseconds)
}
Thread.sleep(1000)
logInfo("Stopping server")
testServer.stop()
logInfo("Stopping context")
ssc.stop()
// Verify whether data received was as expected
logInfo("--------------------------------")
logInfo("output.size = " + outputBuffer.size)
logInfo("output")
outputBuffer.foreach(x => logInfo("[" + x.mkString(",") + "]"))
logInfo("expected output.size = " + expectedOutput.size)
logInfo("expected output")
expectedOutput.foreach(x => logInfo("[" + x.mkString(",") + "]"))
logInfo("--------------------------------")
// Verify whether all the elements received are as expected
// (whether the elements were received one in each interval is not verified)
assert(output.size === expectedOutput.size)
for (i <- 0 until output.size) {
assert(output(i) === expectedOutput(i))
}
}
test("file input stream") {
// Disable manual clock as FileInputDStream does not work with manual clock
conf.set("spark.streaming.clock", "org.apache.spark.streaming.util.SystemClock")
// Set up the streaming context and input streams
val testDir = Files.createTempDir()
val ssc = new StreamingContext(conf, batchDuration)
val fileStream = ssc.textFileStream(testDir.toString)
val outputBuffer = new ArrayBuffer[Seq[String]] with SynchronizedBuffer[Seq[String]]
def output = outputBuffer.flatMap(x => x)
val outputStream = new TestOutputStream(fileStream, outputBuffer)
outputStream.register()
ssc.start()
// Create files in the temporary directory so that Spark Streaming can read data from it
val input = Seq(1, 2, 3, 4, 5)
val expectedOutput = input.map(_.toString)
Thread.sleep(1000)
for (i <- 0 until input.size) {
val file = new File(testDir, i.toString)
Files.write(input(i) + "\n", file, Charset.forName("UTF-8"))
logInfo("Created file " + file)
Thread.sleep(batchDuration.milliseconds)
Thread.sleep(1000)
}
val startTime = System.currentTimeMillis()
Thread.sleep(1000)
val timeTaken = System.currentTimeMillis() - startTime
assert(timeTaken < maxWaitTimeMillis, "Operation timed out after " + timeTaken + " ms")
logInfo("Stopping context")
ssc.stop()
// Verify whether data received by Spark Streaming was as expected
logInfo("--------------------------------")
logInfo("output, size = " + outputBuffer.size)
outputBuffer.foreach(x => logInfo("[" + x.mkString(",") + "]"))
logInfo("expected output, size = " + expectedOutput.size)
expectedOutput.foreach(x => logInfo("[" + x.mkString(",") + "]"))
logInfo("--------------------------------")
// Verify whether all the elements received are as expected
// (whether the elements were received one in each interval is not verified)
assert(output.toList === expectedOutput.toList)
Utils.deleteRecursively(testDir)
// Enable manual clock back again for other tests
conf.set("spark.streaming.clock", "org.apache.spark.streaming.util.ManualClock")
}
// TODO: This test makes assumptions about Thread.sleep() and is flaky
ignore("actor input stream") {
// Start the server
val testServer = new TestServer()
val port = testServer.port
testServer.start()
// Set up the streaming context and input streams
val ssc = new StreamingContext(conf, batchDuration)
val networkStream = ssc.actorStream[String](Props(new TestActor(port)), "TestActor",
// Had to pass the local value of port to prevent from closing over entire scope
StorageLevel.MEMORY_AND_DISK)
val outputBuffer = new ArrayBuffer[Seq[String]] with SynchronizedBuffer[Seq[String]]
val outputStream = new TestOutputStream(networkStream, outputBuffer)
def output = outputBuffer.flatMap(x => x)
outputStream.register()
ssc.start()
// Feed data to the server to send to the network receiver
val clock = ssc.scheduler.clock.asInstanceOf[ManualClock]
val input = 1 to 9
val expectedOutput = input.map(x => x.toString)
Thread.sleep(1000)
for (i <- 0 until input.size) {
testServer.send(input(i).toString)
Thread.sleep(500)
clock.addToTime(batchDuration.milliseconds)
}
Thread.sleep(1000)
logInfo("Stopping server")
testServer.stop()
logInfo("Stopping context")
ssc.stop()
// Verify whether data received was as expected
logInfo("--------------------------------")
logInfo("output.size = " + outputBuffer.size)
logInfo("output")
outputBuffer.foreach(x => logInfo("[" + x.mkString(",") + "]"))
logInfo("expected output.size = " + expectedOutput.size)
logInfo("expected output")
expectedOutput.foreach(x => logInfo("[" + x.mkString(",") + "]"))
logInfo("--------------------------------")
// Verify whether all the elements received are as expected
// (whether the elements were received one in each interval is not verified)
assert(output.size === expectedOutput.size)
for (i <- 0 until output.size) {
assert(output(i) === expectedOutput(i))
}
}
test("multi-thread receiver") {
// set up the test receiver
val numThreads = 10
val numRecordsPerThread = 1000
val numTotalRecords = numThreads * numRecordsPerThread
val testReceiver = new MultiThreadTestReceiver(numThreads, numRecordsPerThread)
MultiThreadTestReceiver.haveAllThreadsFinished = false
// set up the network stream using the test receiver
val ssc = new StreamingContext(conf, batchDuration)
val networkStream = ssc.receiverStream[Int](testReceiver)
val countStream = networkStream.count
val outputBuffer = new ArrayBuffer[Seq[Long]] with SynchronizedBuffer[Seq[Long]]
val outputStream = new TestOutputStream(countStream, outputBuffer)
def output = outputBuffer.flatMap(x => x)
outputStream.register()
ssc.start()
// Let the data from the receiver be received
val clock = ssc.scheduler.clock.asInstanceOf[ManualClock]
val startTime = System.currentTimeMillis()
while((!MultiThreadTestReceiver.haveAllThreadsFinished || output.sum < numTotalRecords) &&
System.currentTimeMillis() - startTime < 5000) {
Thread.sleep(100)
clock.addToTime(batchDuration.milliseconds)
}
Thread.sleep(1000)
logInfo("Stopping context")
ssc.stop()
// Verify whether data received was as expected
logInfo("--------------------------------")
logInfo("output.size = " + outputBuffer.size)
logInfo("output")
outputBuffer.foreach(x => logInfo("[" + x.mkString(",") + "]"))
logInfo("--------------------------------")
assert(output.sum === numTotalRecords)
}
}
/** This is a server to test the network input stream */
class TestServer(portToBind: Int = 0) extends Logging {
val queue = new ArrayBlockingQueue[String](100)
val serverSocket = new ServerSocket(portToBind)
val servingThread = new Thread() {
override def run() {
try {
while(true) {
logInfo("Accepting connections on port " + port)
val clientSocket = serverSocket.accept()
logInfo("New connection")
try {
clientSocket.setTcpNoDelay(true)
val outputStream = new BufferedWriter(new OutputStreamWriter(clientSocket.getOutputStream))
while(clientSocket.isConnected) {
val msg = queue.poll(100, TimeUnit.MILLISECONDS)
if (msg != null) {
outputStream.write(msg)
outputStream.flush()
logInfo("Message '" + msg + "' sent")
}
}
} catch {
case e: SocketException => logError("TestServer error", e)
} finally {
logInfo("Connection closed")
if (!clientSocket.isClosed) clientSocket.close()
}
}
} catch {
case ie: InterruptedException =>
} finally {
serverSocket.close()
}
}
}
def start() { servingThread.start() }
def send(msg: String) { queue.put(msg) }
def stop() { servingThread.interrupt() }
def port = serverSocket.getLocalPort
}
object TestServer {
def main(args: Array[String]) {
val s = new TestServer()
s.start()
while(true) {
Thread.sleep(1000)
s.send("hello")
}
}
}
/** This is an actor for testing actor input stream */
class TestActor(port: Int) extends Actor with ActorHelper {
def bytesToString(byteString: ByteString) = byteString.utf8String
override def preStart = IOManager(context.system).connect(new InetSocketAddress(port))
def receive = {
case IO.Read(socket, bytes) =>
store(bytesToString(bytes))
}
}
/** This is a receiver to test multiple threads inserting data using block generator */
class MultiThreadTestReceiver(numThreads: Int, numRecordsPerThread: Int)
extends Receiver[Int](StorageLevel.MEMORY_ONLY_SER) with Logging {
lazy val executorPool = Executors.newFixedThreadPool(numThreads)
lazy val finishCount = new AtomicInteger(0)
def onStart() {
(1 to numThreads).map(threadId => {
val runnable = new Runnable {
def run() {
(1 to numRecordsPerThread).foreach(i =>
store(threadId * numRecordsPerThread + i) )
if (finishCount.incrementAndGet == numThreads) {
MultiThreadTestReceiver.haveAllThreadsFinished = true
}
logInfo("Finished thread " + threadId)
}
}
executorPool.submit(runnable)
})
}
def onStop() {
executorPool.shutdown()
}
}
object MultiThreadTestReceiver {
var haveAllThreadsFinished = false
}
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