Github user tdas commented on a diff in the pull request:
https://github.com/apache/spark/pull/4961#discussion_r26331002
--- 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 = {
+ // Zookeeper server startup
+ zookeeper = new EmbeddedZookeeper(s"$zkHost:$zkPort")
+ // Get the actual zookeeper binding port
+ zkPort = zookeeper.actualPort
+ zkReady = true
--- End diff --
better to move this at the end of the method. So the same flag can be used
to check whether the client is ready.
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