Github user tdas commented on a diff in the pull request:
https://github.com/apache/spark/pull/4961#discussion_r26331819
--- Diff:
external/kafka/src/main/scala/org/apache/spark/streaming/kafka/KafkaTestUtils.scala
---
@@ -0,0 +1,256 @@
+/*
+ * 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.kafka
+
+import java.io.File
+import java.lang.{Integer => JInt}
+import java.net.InetSocketAddress
+import java.util.{Map => JMap}
+import java.util.Properties
+import java.util.concurrent.TimeoutException
+
+import scala.annotation.tailrec
+import scala.language.postfixOps
+import scala.util.Random
+
+import kafka.admin.AdminUtils
+import kafka.common.KafkaException
+import kafka.producer.{KeyedMessage, Producer, ProducerConfig}
+import kafka.serializer.StringEncoder
+import kafka.server.{KafkaConfig, KafkaServer}
+import kafka.utils.ZKStringSerializer
+import org.apache.zookeeper.server.{NIOServerCnxnFactory, ZooKeeperServer}
+import org.I0Itec.zkclient.ZkClient
+
+import org.apache.spark.Logging
+import org.apache.spark.streaming.Time
+import org.apache.spark.util.Utils
+
+/**
+ * This is a helper class for Kafka test suites. This has the
functionality to set up
+ * and tear down local Kafka servers, and to push data using Kafka
producers.
+ */
+private class KafkaTestUtils extends Logging {
+
+ // Zookeeper related configurations
+ private val zkHost = "localhost"
+ private var zkPort: Int = 0
+ private val zkConnectionTimeout = 6000
+ private val zkSessionTimeout = 6000
+
+ private var zookeeper: EmbeddedZookeeper = _
+
+ var zkClient: ZkClient = _
+
+ // Kafka broker related configurations
+ private val brokerHost = "localhost"
+ private var brokerPort = 9092
+ private var brokerConf: KafkaConfig = _
+
+ // Kafka broker server
+ private var server: KafkaServer = _
+
+ // Kafka producer
+ private var producer: Producer[String, String] = _
+
+ // Flag to test whether the system is correctly started
+ private var zkReady = false
+ private var brokerReady = false
+
+ def zkAddress: String = {
+ assert(zkReady, "Zookeeper not setup yet or already torn down, cannot
get zookeeper address")
+ s"$zkHost:$zkPort"
+ }
+
+ def brokerAddress: String = {
+ assert(brokerReady, "Kafka not setup yet or already torn down, cannot
get broker address")
+ s"$brokerHost:$brokerPort"
+ }
+
+ /** Set up the Embedded Zookeeper server and get the proper Zookeeper
port */
+ def setupEmbeddedZookeeper(): Unit = {
--- End diff --
Its nice to have separate methods for embedder servers, but practically,
they will always be called together. There is not case where you want to set up
one without the other. So it probably makes more sense to keep them in the same
method as before. After all there is only one method of tearing down.
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