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Code refactor and add some unit tests
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...rnal/kafka/src/test/scala/org/apache/spark/streaming/kafka/ReliableKafkaStreamSuite.scala
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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. | ||
| */ | ||
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| package org.apache.spark.streaming.kafka | ||
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| import scala.collection.mutable | ||
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| import kafka.serializer.StringDecoder | ||
| import kafka.utils.{ZkUtils, ZKGroupTopicDirs} | ||
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| import org.apache.spark.SparkConf | ||
| import org.apache.spark.storage.StorageLevel | ||
| import org.apache.spark.streaming.StreamingContext | ||
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| class ReliableKafkaStreamSuite extends KafkaStreamSuite { | ||
| import KafkaTestUtils._ | ||
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| test("Reliable Kafka input stream") { | ||
| val ssc = new StreamingContext(master, framework, batchDuration) | ||
| val topic = "test" | ||
| val sent = Map("a" -> 1, "b" -> 1, "c" -> 1) | ||
| createTopic(topic) | ||
| produceAndSendMessage(topic, sent) | ||
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| val kafkaParams = Map("zookeeper.connect" -> s"$zkHost:$zkPort", | ||
| "group.id" -> s"test-consumer-${random.nextInt(10000)}", | ||
| "auto.offset.reset" -> "smallest") | ||
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| val stream = KafkaUtils.createReliableStream[String, String, StringDecoder, StringDecoder]( | ||
| ssc, | ||
| kafkaParams, | ||
| Map(topic -> 1), | ||
| StorageLevel.MEMORY_ONLY) | ||
| val result = new mutable.HashMap[String, Long]() | ||
| stream.map { case (k, v) => v } | ||
| .foreachRDD { r => | ||
| val ret = r.collect() | ||
| ret.foreach { v => | ||
| val count = result.getOrElseUpdate(v, 0) + 1 | ||
| result.put(v, count) | ||
| } | ||
| } | ||
| ssc.start() | ||
| ssc.awaitTermination(3000) | ||
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| assert(sent.size === result.size) | ||
| sent.keys.foreach { k => assert(sent(k) === result(k).toInt) } | ||
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| ssc.stop() | ||
| } | ||
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| test("Verify the offset commit") { | ||
| val ssc = new StreamingContext(master, framework, batchDuration) | ||
| val topic = "test" | ||
| val sent = Map("a" -> 10, "b" -> 10, "c" -> 10) | ||
| createTopic(topic) | ||
| produceAndSendMessage(topic, sent) | ||
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| val groupId = s"test-consumer-${random.nextInt(10000)}" | ||
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| val kafkaParams = Map("zookeeper.connect" -> s"$zkHost:$zkPort", | ||
| "group.id" -> groupId, | ||
| "auto.offset.reset" -> "smallest") | ||
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| assert(getCommitOffset(groupId, topic, 0) === 0L) | ||
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| val stream = KafkaUtils.createReliableStream[String, String, StringDecoder, StringDecoder]( | ||
| ssc, | ||
| kafkaParams, | ||
| Map(topic -> 1), | ||
| StorageLevel.MEMORY_ONLY) | ||
| stream.foreachRDD(_ => Unit) | ||
| ssc.start() | ||
| ssc.awaitTermination(3000) | ||
| ssc.stop() | ||
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| assert(getCommitOffset(groupId, topic, 0) === 29L) | ||
| } | ||
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| test("Verify multiple topics offset commit") { | ||
| val ssc = new StreamingContext(master, framework, batchDuration) | ||
| val topics = Map("topic1" -> 1, "topic2" -> 1, "topic3" -> 1) | ||
| val sent = Map("a" -> 10, "b" -> 10, "c" -> 10) | ||
| topics.foreach { case (t, _) => | ||
| createTopic(t) | ||
| produceAndSendMessage(t, sent) | ||
| } | ||
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| val groupId = s"test-consumer-${random.nextInt(10000)}" | ||
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| val kafkaParams = Map("zookeeper.connect" -> s"$zkHost:$zkPort", | ||
| "group.id" -> groupId, | ||
| "auto.offset.reset" -> "smallest") | ||
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| topics.foreach { case (t, _) => assert(getCommitOffset(groupId, t, 0) === 0L) } | ||
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| val stream = KafkaUtils.createReliableStream[String, String, StringDecoder, StringDecoder]( | ||
| ssc, | ||
| kafkaParams, | ||
| topics, | ||
| StorageLevel.MEMORY_ONLY) | ||
| stream.foreachRDD(_ => Unit) | ||
| ssc.start() | ||
| ssc.awaitTermination(3000) | ||
| ssc.stop() | ||
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| topics.foreach { case (t, _) => assert(getCommitOffset(groupId, t, 0) === 29L) } | ||
| } | ||
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| test("Verify offset commit when exception is met") { | ||
| val sparkConf = new SparkConf() | ||
| .setMaster(master) | ||
| .setAppName(framework) | ||
| var ssc = new StreamingContext( | ||
| sparkConf.clone.set("spark.streaming.blockInterval", "4000"), | ||
| batchDuration) | ||
| val topics = Map("topic1" -> 1, "topic2" -> 1, "topic3" -> 1) | ||
| val sent = Map("a" -> 10, "b" -> 10, "c" -> 10) | ||
| topics.foreach { case (t, _) => | ||
| createTopic(t) | ||
| produceAndSendMessage(t, sent) | ||
| } | ||
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| val groupId = s"test-consumer-${random.nextInt(10000)}" | ||
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| val kafkaParams = Map("zookeeper.connect" -> s"$zkHost:$zkPort", | ||
| "group.id" -> groupId, | ||
| "auto.offset.reset" -> "smallest") | ||
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| KafkaUtils.createReliableStream[String, String, StringDecoder, StringDecoder]( | ||
| ssc, | ||
| kafkaParams, | ||
| topics, | ||
| StorageLevel.MEMORY_ONLY).foreachRDD(_ => throw new Exception) | ||
| try { | ||
| ssc.start() | ||
| ssc.awaitTermination(1000) | ||
| } catch { | ||
| case e: Exception => | ||
| if (ssc != null) { | ||
| ssc.stop() | ||
| ssc = null | ||
| } | ||
| } | ||
| // Failed before putting to BM, so offset is not updated. | ||
| topics.foreach { case (t, _) => assert(getCommitOffset(groupId, t, 0) === 0L) } | ||
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| // Restart to see if data is consumed from last checkpoint. | ||
| ssc = new StreamingContext(sparkConf, batchDuration) | ||
| KafkaUtils.createReliableStream[String, String, StringDecoder, StringDecoder]( | ||
| ssc, | ||
| kafkaParams, | ||
| topics, | ||
| StorageLevel.MEMORY_ONLY).foreachRDD(_ => Unit) | ||
| ssc.start() | ||
| ssc.awaitTermination(3000) | ||
| ssc.stop() | ||
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| topics.foreach { case (t, _) => assert(getCommitOffset(groupId, t, 0) === 29L) } | ||
| } | ||
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| private def getCommitOffset(groupId: String, topic: String, partition: Int): Long = { | ||
| assert(zkClient != null, "Zookeeper client is not initialized") | ||
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| val topicDirs = new ZKGroupTopicDirs(groupId, topic) | ||
| val zkPath = s"${topicDirs.consumerOffsetDir}/$partition" | ||
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| ZkUtils.readDataMaybeNull(zkClient, zkPath)._1.map(_.toLong).getOrElse(0L) | ||
| } | ||
| } |