├── .gitignore ├── .travis.yml ├── LICENSE ├── README.md ├── project ├── Build.scala ├── build.properties └── plugins.sbt ├── scalastyle-config.xml ├── src ├── it │ └── scala │ │ └── com │ │ └── tuplejump │ │ └── embedded │ │ └── kafka │ │ └── InitialSpec.scala ├── main │ ├── resources │ │ └── logback.xml │ ├── scala-2.10 │ │ └── com │ │ │ └── tuplejump │ │ │ └── embedded │ │ │ └── kafka │ │ │ └── Logging.scala │ ├── scala-2.11 │ │ └── com │ │ │ └── tuplejump │ │ │ └── embedded │ │ │ └── kafka │ │ │ └── Logging.scala │ └── scala │ │ └── com │ │ └── tuplejump │ │ └── embedded │ │ └── kafka │ │ ├── Actors.scala │ │ ├── Assertions.scala │ │ ├── EmbeddedIO.scala │ │ ├── EmbeddedKafka.scala │ │ ├── EmbeddedZookeeper.scala │ │ ├── Events.scala │ │ ├── Settings.scala │ │ └── package.scala └── test │ └── scala │ └── com │ └── tuplejump │ └── embedded │ └── kafka │ ├── AbstractSpec.scala │ └── SimpleConsumer.scala └── version.sbt /.gitignore: -------------------------------------------------------------------------------- 1 | *.class 2 | .cache/ 3 | 4 | # SBT 5 | lib_managed 6 | .history 7 | .lib/ 8 | dist/* 9 | lib_managed/ 10 | src_managed/ 11 | target 12 | **/target/ 13 | lib_managed/ 14 | src_managed/ 15 | project/project 16 | project/boot/ 17 | project/plugins/project/ 18 | 19 | # Mac 20 | .DS_Store 21 | 22 | # Log files 23 | /logs 24 | *.log 25 | checkpoint 26 | 27 | # IntelliJ 28 | .idea 29 | .idea_modules 30 | *.iml 31 | 32 | # Worksheets (Eclipse or IntelliJ) 33 | *.sc 34 | 35 | # Eclipse 36 | .cache* 37 | .classpath 38 | .project 39 | .scala_dependencies 40 | .settings 41 | .target 42 | .worksheet -------------------------------------------------------------------------------- /.travis.yml: -------------------------------------------------------------------------------- 1 | language: scala 2 | jdk: 3 | - oraclejdk8 4 | sudo: false 5 | scala: 6 | - 2.10.5 7 | - 2.11.7 8 | 9 | script: 10 | - "sbt ++$TRAVIS_SCALA_VERSION -Dtravis=true test" -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | Apache License 2 | Version 2.0, January 2004 3 | http://www.apache.org/licenses/ 4 | 5 | TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 6 | 7 | 1. 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Much is taken right from the Apache Spark Streaming Kafka test files. 3 | 4 | ## Features 5 | 6 | - Quick and easy prototyping, testing 7 | - Safe demos - not reliant on network 8 | - Compatible with Apache Kafka: 0.9.0.0, 0.9.0.1 9 | - Compatible with Scala 2.10 and 2.11 10 | - Embedded Zookeeper which starts automatically when starting Kafka 11 | - Simple Kafka consumer 12 | 13 | ## Roadmap 14 | 15 | - Improved and updated consumers 16 | - Validation 17 | - Additional and improved configuration 18 | - Documentation 19 | - And much more 20 | 21 | ## Scala Version 22 | This project uses Scala 2.11 by default. To build against Scala 2.10 vs 2.11 run 23 | 24 | sbt -Dscala.version=2.10.6 25 | sbt -Dscala.version=2.10.6 test 26 | sbt -Dscala.version=2.10.6 publish-local 27 | 28 | ### Cross Build 29 | Cross build both Scala versions by starting sbt then running these or other SBT tasks: 30 | 31 | + publish-local 32 | + test 33 | 34 | -------------------------------------------------------------------------------- /project/Build.scala: -------------------------------------------------------------------------------- 1 | 2 | import scala.language.postfixOps 3 | import sbt.Keys._ 4 | import sbt._ 5 | import de.heikoseeberger.sbtheader.AutomateHeaderPlugin 6 | 7 | object Build extends sbt.Build { 8 | 9 | lazy val root = project.in(file(".")) 10 | .settings(Settings.common ++ Settings.publishSettings) 11 | .settings(Seq(libraryDependencies ++= Seq( 12 | "org.apache.kafka" %% "kafka" % "0.9.0.1", 13 | "ch.qos.logback" % "logback-classic" % "1.0.7", 14 | "commons-io" % "commons-io" % "2.4", 15 | "org.scalacheck" %% "scalacheck" % "1.12.5" % "test, it", 16 | "org.scalatest" %% "scalatest" % "2.2.5" % "test, it" 17 | ) ++ 18 | (CrossVersion.partialVersion(scalaVersion.value) match { 19 | case Some((2, minor)) if minor < 11 => Seq( 20 | "com.typesafe.akka" %% "akka-actor" % "2.3.14", 21 | "org.slf4j" % "slf4j-api" % "1.7.13") 22 | case _ => Seq( 23 | "com.typesafe.akka" %% "akka-actor" % "2.4.1", 24 | "com.typesafe.scala-logging" %% "scala-logging" % "3.1.0") 25 | }))) 26 | .enablePlugins(AutomateHeaderPlugin) configs IntegrationTest 27 | 28 | } 29 | 30 | object Settings extends sbt.Build { 31 | import de.heikoseeberger.sbtheader.HeaderPlugin 32 | import de.heikoseeberger.sbtheader.license.Apache2_0 33 | import wartremover.WartRemover.autoImport._ 34 | import com.typesafe.tools.mima.plugin.MimaKeys._ 35 | import com.typesafe.tools.mima.plugin.MimaPlugin._ 36 | import org.scalastyle.sbt.ScalastylePlugin._ 37 | import scoverage.ScoverageKeys 38 | 39 | val versionStatus = settingKey[Unit]("The Scala version used in cross-build reapply for '+ package', '+ publish'.") 40 | 41 | final val javaVersion = scala.util.Properties.javaVersion 42 | 43 | final val javaBinaryVersion = javaVersion.dropRight(5) 44 | 45 | lazy val buildSettings = Seq( 46 | name := "embedded-kafka", 47 | organization := "com.tuplejump", 48 | licenses += ("Apache-2.0", url("http://www.apache.org/licenses/LICENSE-2.0")), 49 | homepage := Some(url("http://github.com/tuplejump/embedded-kafka")), 50 | 51 | pomExtra := 52 | 53 | git@github.com:tuplejump/embedded-kafka.git 54 | scm:git:git@github.com:tuplejump/embedded-kafka.git 55 | 56 | 57 | 58 | helena 59 | Helena Edelson 60 | 61 | , 62 | 63 | crossScalaVersions := Seq("2.11.7", "2.10.6"), 64 | 65 | crossVersion := CrossVersion.binary, 66 | 67 | scalaVersion := sys.props.getOrElse("scala.version", crossScalaVersions.value.head), 68 | 69 | versionStatus := { 70 | println(s"Scala: ${scalaVersion.value} Java: $javaVersion") 71 | }, 72 | 73 | HeaderPlugin.autoImport.headers := Map( 74 | "scala" -> Apache2_0("2016", "Tuplejump"), 75 | "conf" -> Apache2_0("2016", "Tuplejump", "#") 76 | ) 77 | ) 78 | 79 | val encoding = Seq("-encoding", "UTF-8") 80 | 81 | lazy val common = buildSettings ++ testSettings ++ styleSettings ++ Seq( 82 | 83 | cancelable in Global := true, 84 | 85 | crossPaths in ThisBuild := true, 86 | 87 | logBuffered in Compile := false, 88 | logBuffered in Test := false, 89 | 90 | outputStrategy := Some(StdoutOutput), 91 | 92 | ScoverageKeys.coverageHighlighting := true, 93 | 94 | aggregate in update := false, 95 | 96 | updateOptions := updateOptions.value.withCachedResolution(true), 97 | 98 | incOptions := incOptions.value.withNameHashing(true), 99 | 100 | scalacOptions ++= encoding ++ Seq( 101 | "-Xfatal-warnings", 102 | "-deprecation", 103 | "-feature", 104 | "-language:_", 105 | "-unchecked", 106 | "-Xlint", 107 | "-Yno-adapted-args", 108 | "-Ywarn-dead-code" // N.B. doesn't work well with the ??? hole 109 | /* "-Ywarn-numeric-widen", 110 | "-Ywarn-value-discard") */ 111 | ), 112 | 113 | scalacOptions ++= ( 114 | CrossVersion.partialVersion(scalaVersion.value) match { 115 | case Some((2, minor)) if minor < 11 => Seq.empty 116 | case _ => Seq("-Ywarn-unused-import") 117 | }), 118 | 119 | javacOptions ++= encoding ++ Seq( 120 | "-source", javaBinaryVersion, 121 | "-target", javaBinaryVersion, 122 | "-Xmx1G", 123 | "-Xlint:unchecked", 124 | "-Xlint:deprecation" 125 | ), 126 | 127 | autoCompilerPlugins := true, 128 | autoAPIMappings := true, 129 | //exportJars := true 130 | 131 | ivyScala := ivyScala.value map { 132 | _.copy(overrideScalaVersion = true) 133 | }, 134 | 135 | ivyLoggingLevel in ThisBuild := UpdateLogging.Quiet, 136 | 137 | evictionWarningOptions in update := EvictionWarningOptions.default 138 | .withWarnTransitiveEvictions(false) 139 | .withWarnDirectEvictions(false) 140 | .withWarnScalaVersionEviction(false), 141 | 142 | crossPaths in ThisBuild := true, 143 | 144 | wartremoverErrors in (Compile, compile) := 145 | (CrossVersion.partialVersion(scalaVersion.value) match { 146 | case Some((2, minor)) if minor < 11 => 147 | Seq.empty[wartremover.Wart] 148 | case _ => 149 | Warts.allBut( 150 | Wart.Any,//todo exclude actor 151 | Wart.Throw, 152 | Wart.DefaultArguments, 153 | Wart.NonUnitStatements, 154 | Wart.Nothing, 155 | Wart.ToString) 156 | }), 157 | 158 | parallelExecution in ThisBuild := false, 159 | parallelExecution in Global := false, 160 | 161 | publishMavenStyle := false, 162 | 163 | managedSourceDirectories := (scalaSource in Compile).value :: Nil, 164 | unmanagedSourceDirectories := (scalaSource in Compile).value :: Nil 165 | ) 166 | 167 | val compileScalastyle = taskKey[Unit]("compileScalastyle") 168 | 169 | val testScalastyle = taskKey[Unit]("testScalastyle") 170 | 171 | lazy val styleSettings = Seq( 172 | testScalastyle := org.scalastyle.sbt.ScalastylePlugin.scalastyle.in(Test).toTask("").value, 173 | scalastyleFailOnError := true, 174 | compileScalastyle := org.scalastyle.sbt.ScalastylePlugin.scalastyle.in(Compile).toTask("").value 175 | ) 176 | 177 | val testConfigs = inConfig(Test)(Defaults.testTasks) ++ inConfig(IntegrationTest)(Defaults.itSettings) 178 | 179 | val testOptionSettings = Seq( 180 | Tests.Argument(TestFrameworks.ScalaTest, "-oDF") 181 | ) 182 | 183 | lazy val testSettings = testConfigs ++ Seq( 184 | parallelExecution in Test := false, 185 | parallelExecution in IntegrationTest := false, 186 | testOptions in Test ++= testOptionSettings, 187 | testOptions in IntegrationTest ++= testOptionSettings, 188 | fork in Test := true, 189 | fork in IntegrationTest := true, 190 | (compile in IntegrationTest) <<= (compile in Test, compile in IntegrationTest) map { (_, c) => c }, 191 | (internalDependencyClasspath in IntegrationTest) <<= Classpaths.concat(internalDependencyClasspath in IntegrationTest, exportedProducts in Test) 192 | ) 193 | 194 | lazy val mimaSettings = mimaDefaultSettings ++ Seq( 195 | previousArtifact := None, 196 | binaryIssueFilters ++= Seq.empty 197 | ) 198 | 199 | lazy val publishSettings = Seq( 200 | publishMavenStyle := true, 201 | publishTo := { 202 | val nexus = "https://oss.sonatype.org/" 203 | if (isSnapshot.value) 204 | Some("snapshots" at nexus + "content/repositories/snapshots") 205 | else 206 | Some("releases" at nexus + "service/local/staging/deploy/maven2") 207 | }, 208 | publishArtifact in Test := false, 209 | pomIncludeRepository := { _ => false } 210 | ) 211 | } 212 | -------------------------------------------------------------------------------- /project/build.properties: -------------------------------------------------------------------------------- 1 | sbt.version = 0.13.11 -------------------------------------------------------------------------------- /project/plugins.sbt: -------------------------------------------------------------------------------- 1 | addSbtPlugin("com.github.gseitz" % "sbt-release" % "0.8.5") 2 | addSbtPlugin("com.eed3si9n" % "sbt-buildinfo" % "0.5.0") 3 | addSbtPlugin("com.typesafe" % "sbt-mima-plugin" % "0.1.8") 4 | addSbtPlugin("org.brianmckenna" % "sbt-wartremover" % "0.14") 5 | addSbtPlugin("org.scoverage" % "sbt-scoverage" % "1.3.3") 6 | addSbtPlugin("org.scalastyle" %% "scalastyle-sbt-plugin" % "0.6.0") 7 | addSbtPlugin("de.heikoseeberger" % "sbt-header" % "1.5.0") 8 | addSbtPlugin("com.sksamuel.sbt-versions" % "sbt-versions" % "0.2.0") 9 | addSbtPlugin("org.xerial.sbt" % "sbt-sonatype" % "1.1") 10 | addSbtPlugin("com.jsuereth" % "sbt-pgp" % "1.0.0") 11 | //addSbtPlugin("com.scalapenos" % "sbt-prompt" % "0.2.1") 12 | //addSbtPlugin("com.typesafe.sbt" % "sbt-git" % "0.8.5") -------------------------------------------------------------------------------- /scalastyle-config.xml: -------------------------------------------------------------------------------- 1 | 2 | Scalastyle standard configuration 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | 45 | 46 | 47 | 48 | 49 | 50 | 51 | 52 | 53 | 54 | 55 | 56 | 57 | 58 | 59 | 60 | 61 | 62 | 63 | 64 | 65 | 66 | 67 | 68 | 69 | 70 | 71 | 72 | 73 | 74 | 75 | 76 | 77 | 78 | 79 | 80 | 81 | 82 | 83 | 84 | 85 | 86 | 87 | 88 | 89 | 90 | 91 | 92 | 93 | 94 | 95 | -------------------------------------------------------------------------------- /src/it/scala/com/tuplejump/embedded/kafka/InitialSpec.scala: -------------------------------------------------------------------------------- 1 | /* 2 | * Copyright 2016 Tuplejump 3 | * 4 | * Licensed under the Apache License, Version 2.0 (the "License"); 5 | * you may not use this file except in compliance with the License. 6 | * You may obtain a copy of the License at 7 | * 8 | * http://www.apache.org/licenses/LICENSE-2.0 9 | * 10 | * Unless required by applicable law or agreed to in writing, software 11 | * distributed under the License is distributed on an "AS IS" BASIS, 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 | * See the License for the specific language governing permissions and 14 | * limitations under the License. 15 | */ 16 | 17 | package com.tuplejump.embedded.kafka 18 | 19 | import java.util.concurrent.{TimeUnit, CountDownLatch} 20 | 21 | import org.apache.kafka.common.serialization.StringDeserializer 22 | import org.scalatest.concurrent.Eventually 23 | import org.scalatest.concurrent.PatienceConfiguration.Timeout 24 | import org.scalatest.time.{Millis, Span} 25 | 26 | class InitialSpec extends AbstractSpec with Eventually with Logging { 27 | 28 | private val timeout = Timeout(Span(10000, Millis)) 29 | 30 | "Initially, EmbeddedKafka" must { 31 | val kafka = new EmbeddedKafka() 32 | val topic = "test" 33 | val total = 1000 34 | val latch = new CountDownLatch(total) 35 | 36 | "start embedded zookeeper and embedded kafka" in { 37 | kafka.isRunning should be (false) 38 | kafka.start() 39 | eventually(timeout)(kafka.isRunning) 40 | } 41 | "create a topic" in { 42 | kafka.createTopic(topic, 1, 1) 43 | } 44 | "publish messages to the embedded kafka instance" in { 45 | val config = kafka.consumerConfig( 46 | group = "some.group", 47 | kafkaConnect = kafka.kafkaConfig.hostName + ":" + kafka.kafkaConfig.port, 48 | zkConnect = kafka.kafkaConfig.zkConnect, 49 | offsetPolicy = "largest",//latest with new consumer 50 | autoCommitEnabled = true, 51 | kDeserializer = classOf[StringDeserializer], 52 | vDeserializer = classOf[StringDeserializer]) 53 | val consumer = new SimpleConsumer(latch, config, topic, "consumer.group", 1, 1) 54 | 55 | val batch1 = for (n <- 0 until total) yield s"message-test-$n" 56 | 57 | logger.info(s"Publishing ${batch1.size} messages...") 58 | 59 | kafka.sendMessages(topic, batch1) 60 | latch.await(10000, TimeUnit.MILLISECONDS) 61 | latch.getCount should be (0) 62 | 63 | consumer.shutdown() 64 | } 65 | "shut down relatively cleanly for now" in { 66 | kafka.shutdown() 67 | eventually(timeout)(!kafka.isRunning) 68 | } 69 | } 70 | } 71 | -------------------------------------------------------------------------------- /src/main/resources/logback.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | [%level] [%date{ISO8601}] [%logger]: %msg%n 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | -------------------------------------------------------------------------------- /src/main/scala-2.10/com/tuplejump/embedded/kafka/Logging.scala: -------------------------------------------------------------------------------- 1 | /* 2 | * Copyright 2016 Tuplejump 3 | * 4 | * Licensed under the Apache License, Version 2.0 (the "License"); 5 | * you may not use this file except in compliance with the License. 6 | * You may obtain a copy of the License at 7 | * 8 | * http://www.apache.org/licenses/LICENSE-2.0 9 | * 10 | * Unless required by applicable law or agreed to in writing, software 11 | * distributed under the License is distributed on an "AS IS" BASIS, 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 | * See the License for the specific language governing permissions and 14 | * limitations under the License. 15 | */ 16 | 17 | package com.tuplejump.embedded.kafka 18 | 19 | import org.slf4j.LoggerFactory 20 | 21 | trait Logging { 22 | 23 | protected val logger = LoggerFactory.getLogger(getClass.getName) 24 | 25 | } 26 | -------------------------------------------------------------------------------- /src/main/scala-2.11/com/tuplejump/embedded/kafka/Logging.scala: -------------------------------------------------------------------------------- 1 | /* 2 | * Copyright 2016 Tuplejump 3 | * 4 | * Licensed under the Apache License, Version 2.0 (the "License"); 5 | * you may not use this file except in compliance with the License. 6 | * You may obtain a copy of the License at 7 | * 8 | * http://www.apache.org/licenses/LICENSE-2.0 9 | * 10 | * Unless required by applicable law or agreed to in writing, software 11 | * distributed under the License is distributed on an "AS IS" BASIS, 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 | * See the License for the specific language governing permissions and 14 | * limitations under the License. 15 | */ 16 | 17 | package com.tuplejump.embedded.kafka 18 | 19 | import com.typesafe.scalalogging.StrictLogging 20 | 21 | trait Logging extends StrictLogging 22 | -------------------------------------------------------------------------------- /src/main/scala/com/tuplejump/embedded/kafka/Actors.scala: -------------------------------------------------------------------------------- 1 | /* 2 | * Copyright 2016 Tuplejump 3 | * 4 | * Licensed under the Apache License, Version 2.0 (the "License"); 5 | * you may not use this file except in compliance with the License. 6 | * You may obtain a copy of the License at 7 | * 8 | * http://www.apache.org/licenses/LICENSE-2.0 9 | * 10 | * Unless required by applicable law or agreed to in writing, software 11 | * distributed under the License is distributed on an "AS IS" BASIS, 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 | * See the License for the specific language governing permissions and 14 | * limitations under the License. 15 | */ 16 | 17 | package com.tuplejump.embedded.kafka 18 | 19 | import scala.reflect.ClassTag 20 | import scala.util.Try 21 | import akka.actor.Actor 22 | import akka.actor.Props 23 | import kafka.producer.{ProducerConfig, KeyedMessage, Producer} 24 | 25 | // only string so far 26 | //TODO error handling 27 | class KafkaPublisher[K,V : ClassTag](producer: Producer[K,V]) extends Actor { 28 | 29 | override def postStop(): Unit = Try(producer.close()) 30 | 31 | def receive: Actor.Receive = { 32 | case e: Events.PublishTo[V] => publish(e) 33 | } 34 | 35 | private def publish(e: Events.PublishTo[V]): Unit = 36 | producer.send(e.data.toArray.map { new KeyedMessage[K,V](e.topic, _) }: _*) 37 | 38 | } 39 | 40 | 41 | object KafkaPublisher { 42 | 43 | def props(producerConfig: ProducerConfig): Props = { 44 | val producer = new Producer[String,String](producerConfig) 45 | Props(new KafkaPublisher(producer)) 46 | } 47 | } 48 | -------------------------------------------------------------------------------- /src/main/scala/com/tuplejump/embedded/kafka/Assertions.scala: -------------------------------------------------------------------------------- 1 | /* 2 | * Copyright 2016 Tuplejump 3 | * 4 | * Licensed under the Apache License, Version 2.0 (the "License"); 5 | * you may not use this file except in compliance with the License. 6 | * You may obtain a copy of the License at 7 | * 8 | * http://www.apache.org/licenses/LICENSE-2.0 9 | * 10 | * Unless required by applicable law or agreed to in writing, software 11 | * distributed under the License is distributed on an "AS IS" BASIS, 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 | * See the License for the specific language governing permissions and 14 | * limitations under the License. 15 | */ 16 | 17 | package com.tuplejump.embedded.kafka 18 | 19 | import java.util.concurrent.TimeoutException 20 | 21 | import scala.annotation.tailrec 22 | import scala.util.control.NonFatal 23 | 24 | /** 25 | * Simple helper assertions. 26 | */ 27 | trait Assertions { 28 | 29 | def eventually[T](timeout: Long, interval: Long)(func: => T): T = { 30 | def makeAttempt(): Either[Throwable, T] = { 31 | try Right(func) catch { 32 | case NonFatal(e) => Left(e) 33 | } 34 | } 35 | 36 | val startTime = System.currentTimeMillis() 37 | @tailrec 38 | def tryAgain(attempt: Int): T = { 39 | makeAttempt() match { 40 | case Right(result) => result 41 | case Left(e) => 42 | val duration = System.currentTimeMillis() - startTime 43 | if (duration < timeout) { 44 | Thread.sleep(interval) 45 | } else { 46 | throw new TimeoutException(e.getMessage) 47 | } 48 | 49 | tryAgain(attempt + 1) 50 | } 51 | } 52 | 53 | tryAgain(1) 54 | } 55 | 56 | } 57 | -------------------------------------------------------------------------------- /src/main/scala/com/tuplejump/embedded/kafka/EmbeddedIO.scala: -------------------------------------------------------------------------------- 1 | /* 2 | * Copyright 2016 Tuplejump 3 | * 4 | * Licensed under the Apache License, Version 2.0 (the "License"); 5 | * you may not use this file except in compliance with the License. 6 | * You may obtain a copy of the License at 7 | * 8 | * http://www.apache.org/licenses/LICENSE-2.0 9 | * 10 | * Unless required by applicable law or agreed to in writing, software 11 | * distributed under the License is distributed on an "AS IS" BASIS, 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 | * See the License for the specific language governing permissions and 14 | * limitations under the License. 15 | */ 16 | 17 | package com.tuplejump.embedded.kafka 18 | 19 | import java.io.{ File => JFile } 20 | 21 | import scala.util.Try 22 | import org.apache.commons.io.FileUtils 23 | 24 | object EmbeddedIO extends Logging { 25 | 26 | private val shutdownDeletePaths = new scala.collection.mutable.HashSet[String]() 27 | 28 | val logsDir = new JFile(".", "logs") 29 | dirSetup(new JFile(logsDir.getAbsolutePath)) 30 | 31 | /** Creates tmp dirs that automatically get deleted on shutdown. */ 32 | def createTempDir(tmpName: String): JFile = 33 | dirSetup(new JFile(logsDir, tmpName)) 34 | 35 | private def dirSetup(dir: JFile): JFile = { 36 | if (logsDir.exists()) deleteRecursively(logsDir) 37 | dir.mkdir 38 | 39 | logger.info(s"Created dir ${dir.getAbsolutePath.replace("./", "")}") 40 | 41 | registerShutdownDeleteDir(dir) 42 | 43 | sys.runtime.addShutdownHook(new Thread("delete temp dir " + dir) { 44 | override def run(): Unit = { 45 | if (!hasRootAsShutdownDeleteDir(dir)) deleteRecursively(dir) 46 | } 47 | }) 48 | dir 49 | } 50 | 51 | protected def registerShutdownDeleteDir(file: JFile) { 52 | shutdownDeletePaths.synchronized { 53 | shutdownDeletePaths += file.getAbsolutePath 54 | } 55 | } 56 | 57 | private def hasRootAsShutdownDeleteDir(file: JFile): Boolean = { 58 | val absolutePath = file.getAbsolutePath 59 | shutdownDeletePaths.synchronized { 60 | shutdownDeletePaths.exists { path => 61 | !absolutePath.equals(path) && absolutePath.startsWith(path) 62 | } 63 | } 64 | } 65 | 66 | protected def deleteRecursively(delete: JFile): Unit = 67 | for { 68 | file <- Option(delete) 69 | } Try(FileUtils.deleteDirectory(file)) 70 | } 71 | -------------------------------------------------------------------------------- /src/main/scala/com/tuplejump/embedded/kafka/EmbeddedKafka.scala: -------------------------------------------------------------------------------- 1 | /* 2 | * Copyright 2016 Tuplejump 3 | * 4 | * Licensed under the Apache License, Version 2.0 (the "License"); 5 | * you may not use this file except in compliance with the License. 6 | * You may obtain a copy of the License at 7 | * 8 | * http://www.apache.org/licenses/LICENSE-2.0 9 | * 10 | * Unless required by applicable law or agreed to in writing, software 11 | * distributed under the License is distributed on an "AS IS" BASIS, 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 | * See the License for the specific language governing permissions and 14 | * limitations under the License. 15 | */ 16 | 17 | package com.tuplejump.embedded.kafka 18 | 19 | import java.util.concurrent.atomic.{ AtomicReference, AtomicBoolean } 20 | 21 | import org.apache.kafka.common.serialization.StringSerializer 22 | import org.apache.kafka.clients.producer.{ProducerRecord, KafkaProducer} 23 | import kafka.admin.AdminUtils 24 | import kafka.producer.ProducerConfig 25 | import kafka.server.{ KafkaConfig, KafkaServer } 26 | import org.I0Itec.zkclient.ZkClient 27 | 28 | final class EmbeddedKafka(kafkaConnect: String, zkConnect: String) 29 | extends Settings with Assertions with Logging { 30 | 31 | def this() = this(DefaultKafkaConnect, DefaultZookeeperConnect) 32 | 33 | /** Should an error occur, make sure it shuts down. */ 34 | sys.runtime.addShutdownHook(new Thread("Shutting down embedded kafka") { 35 | override def run(): Unit = shutdown() 36 | }) 37 | 38 | val logDir = EmbeddedIO.logsDir 39 | val snapDir = EmbeddedIO.createTempDir("zk-snapshots") 40 | val dataDir = EmbeddedIO.createTempDir("zk-data") 41 | 42 | val config = brokerConfig(kafkaConnect, zkConnect, dataDir.getAbsolutePath) 43 | 44 | val kafkaConfig: KafkaConfig = new KafkaConfig(mapToProps(config)) 45 | 46 | /** hard-coded for Strings only so far. Roadmap: making configurable. */ 47 | val producerConfig: ProducerConfig = new ProducerConfig(mapToProps( 48 | super.producerConfig(kafkaConnect, classOf[StringSerializer], classOf[StringSerializer]) 49 | )) 50 | 51 | private val _isRunning = new AtomicBoolean(false) 52 | 53 | private val _zookeeper = new AtomicReference[Option[EmbeddedZookeeper]](None) 54 | 55 | private val _zkClient = new AtomicReference[Option[ZkClient]](None) 56 | 57 | private val _server = new AtomicReference[Option[KafkaServer]](None) 58 | 59 | private val _producer = new AtomicReference[Option[KafkaProducer[String, String]]](None) 60 | 61 | def server: KafkaServer = _server.get.getOrElse { 62 | logger.info("Attempt to call server before starting EmbeddedKafka instance. Starting automatically...") 63 | start() 64 | eventually(5000, 500)(assert(isRunning, "Kafka must be running.")) 65 | _server.get.getOrElse(throw new IllegalStateException("Kafka server not initialized.")) 66 | } 67 | 68 | def isRunning: Boolean = { 69 | _zookeeper.get.exists(_.isRunning) && _server.get.isDefined && _isRunning.get() // a better way? 70 | } 71 | 72 | def producer: KafkaProducer[String, String] = _producer.get.getOrElse { 73 | require(isRunning, "Attempt to call producer before starting EmbeddedKafka instance. Call EmbeddedKafka.start() first.") 74 | val p = try new KafkaProducer[String, String](producerConfig.props.props) catch { 75 | case e: Throwable => logger.error(s"Unable to create producer.", e); throw e 76 | } 77 | _producer.set(Some(p)) 78 | p 79 | } 80 | 81 | /** Starts the embedded Zookeeper server and Kafka brokers. */ 82 | def start(): Unit = { 83 | require(_zookeeper.get.forall(!_.isRunning), "Zookeeper should not be running prior to calling 'start'.") 84 | require(_server.get.isEmpty, "KafkaServer should not be running prior to calling 'start'.") 85 | 86 | val zk = new EmbeddedZookeeper(zkConnect, 6000, snapDir, dataDir) 87 | zk.start() 88 | eventually(5000, 500) { 89 | require(zk.isRunning, "Zookeeper must be started before proceeding with setup.") 90 | _zookeeper.set(Some(zk)) 91 | } 92 | 93 | logger.info("Starting ZkClient") 94 | _zkClient.set(Some(new ZkClient(zkConnect, 6000, 60000, DefaultStringSerializer))) 95 | 96 | 97 | logger.info("Starting KafkaServer") 98 | _server.set(Some(new KafkaServer(kafkaConfig))) 99 | server.startup() 100 | 101 | _isRunning.set(true) // TODO add a test 102 | } 103 | 104 | /** Creates a Kafka topic and waits until it is propagated to the cluster. */ 105 | def createTopic(topic: String, numPartitions: Int, replicationFactor: Int): Unit = { 106 | AdminUtils.createTopic(server.zkUtils, topic, numPartitions, replicationFactor) 107 | eventually(10000, 1000) { 108 | assert(AdminUtils.topicExists(server.zkUtils, topic)) 109 | logger.info(s"Topic [$topic] created.") 110 | } 111 | } 112 | 113 | /** Send the messages to the Kafka broker */ 114 | def sendMessages(topic: String, messageToFreq: Map[String, Int]): Unit = { 115 | val messages = messageToFreq.flatMap { case (s, freq) => Seq.fill(freq)(s) }.toArray 116 | sendMessages(topic, messages) 117 | } 118 | 119 | /** Send the array of messages to the Kafka broker */ 120 | def sendMessages(topic: String, messages: Iterable[String]): Unit = 121 | for { 122 | message <- messages 123 | } producer.send(new ProducerRecord[String, String](topic, message)) 124 | 125 | /* TODO with a key and as [K,V] and Array[Byte]*/ 126 | private val toRecord = (topic: String, group: Option[String], message: String) => group match { 127 | case Some(k) => new ProducerRecord[String, String](topic, k, message) 128 | case _ => new ProducerRecord[String, String](topic, message) 129 | } 130 | 131 | /** Shuts down the embedded servers.*/ 132 | def shutdown(): Unit = try { 133 | logger.info(s"Shutting down Kafka server.") 134 | 135 | for (v <- _producer.get) v.close() 136 | for (v <- _server.get) { 137 | //https://issues.apache.org/jira/browse/KAFKA-1887 138 | v.kafkaController.shutdown() 139 | v.shutdown() 140 | v.awaitShutdown() 141 | } 142 | 143 | for (v <- _zkClient.get) v.close() 144 | 145 | for (v <- _zookeeper.get) v.shutdown() 146 | 147 | _producer.set(None) 148 | _server.set(None) 149 | _zkClient.set(None) 150 | _zookeeper.set(None) 151 | } catch { 152 | case e: Throwable => 153 | logger.error("Error shutting down.", e) 154 | } 155 | } 156 | -------------------------------------------------------------------------------- /src/main/scala/com/tuplejump/embedded/kafka/EmbeddedZookeeper.scala: -------------------------------------------------------------------------------- 1 | /* 2 | * Copyright 2016 Tuplejump 3 | * 4 | * Licensed under the Apache License, Version 2.0 (the "License"); 5 | * you may not use this file except in compliance with the License. 6 | * You may obtain a copy of the License at 7 | * 8 | * http://www.apache.org/licenses/LICENSE-2.0 9 | * 10 | * Unless required by applicable law or agreed to in writing, software 11 | * distributed under the License is distributed on an "AS IS" BASIS, 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 | * See the License for the specific language governing permissions and 14 | * limitations under the License. 15 | */ 16 | 17 | package com.tuplejump.embedded.kafka 18 | 19 | import java.io.{File => JFile} 20 | import java.net.InetSocketAddress 21 | import java.util.concurrent.atomic.AtomicReference 22 | 23 | import scala.util.Try 24 | import org.I0Itec.zkclient.exception.ZkMarshallingError 25 | import org.I0Itec.zkclient.serialize.ZkSerializer 26 | import org.apache.zookeeper.server.{ NIOServerCnxnFactory, ZooKeeperServer } 27 | 28 | /** 29 | * Implements a simple standalone ZooKeeperServer. 30 | * To create a ZooKeeper client object, the application needs to pass a 31 | * connection string containing a comma separated list of host:port pairs, 32 | * each corresponding to a ZooKeeper server. 33 | *

34 | * Session establishment is asynchronous. This constructor will initiate 35 | * connection to the server and return immediately - potentially (usually) 36 | * before the session is fully established. The watcher argument specifies 37 | * the watcher that will be notified of any changes in state. This 38 | * notification can come at any point before or after the constructor call 39 | * has returned. 40 | *

41 | * The instantiated ZooKeeper client object will pick an arbitrary server 42 | * from the connectString and attempt to connect to it. If establishment of 43 | * the connection fails, another server in the connect string will be tried 44 | * (the order is non-deterministic, as we random shuffle the list), until a 45 | * connection is established. The client will continue attempts until the 46 | * session is explicitly closed. 47 | */ 48 | class EmbeddedZookeeper(val connectTo: String, 49 | val tickTime: Int, 50 | snapDir: JFile, 51 | dataDir: JFile) extends Assertions with Logging { 52 | 53 | logger.info("Starting Zookeeper") 54 | 55 | private val _factory = new AtomicReference[Option[NIOServerCnxnFactory]](None) 56 | 57 | private val _zookeeper = new AtomicReference[Option[ZooKeeperServer]](None) 58 | 59 | def isRunning: Boolean = _zookeeper.get exists (_.isRunning) 60 | 61 | def zookeeper: ZooKeeperServer = _zookeeper.get.getOrElse { 62 | logger.info("Attempt to call server before starting EmbeddedKafka instance. Starting automatically...") 63 | start() 64 | eventually(5000, 500)(assert(isRunning)) 65 | 66 | _zookeeper.get.getOrElse(throw new IllegalStateException("Kafka server not initialized.")) 67 | } 68 | 69 | /** Starts only one. */ 70 | def start(): Unit = { 71 | val server = new ZooKeeperServer(snapDir, dataDir, tickTime) 72 | _zookeeper.set(Some(server)) 73 | 74 | val (ip, port) = { 75 | val splits = connectTo.split(":") 76 | (splits(0), splits(1).toInt) 77 | } 78 | 79 | val f = new NIOServerCnxnFactory() 80 | f.configure(new InetSocketAddress(ip, port), 16) 81 | f.startup(server) 82 | 83 | _factory.set(Some(f)) 84 | 85 | logger.info(s"ZooKeeperServer isRunning: $isRunning") 86 | } 87 | 88 | def shutdown(): Unit = { 89 | logger.info(s"Shutting down ZK NIOServerCnxnFactory.") 90 | 91 | for (v <- _factory.get) v.shutdown() 92 | _factory.set(None) 93 | 94 | for (v <- _zookeeper.get) { 95 | Try(v.shutdown()) 96 | //awaitCond(!v.isRunning, 2000.millis) 97 | logger.info(s"ZooKeeper server shut down.") 98 | } 99 | _zookeeper.set(None) 100 | } 101 | } 102 | 103 | object DefaultStringSerializer extends ZkSerializer { 104 | 105 | @throws(classOf[ZkMarshallingError]) 106 | def serialize(data: Object): Array[Byte] = data match { 107 | case a: String => a.getBytes("UTF-8") 108 | case _ => throw new ZkMarshallingError(s"Unsupported type '${data.getClass}'") 109 | } 110 | 111 | @throws(classOf[ZkMarshallingError]) 112 | def deserialize(bytes: Array[Byte]): Object = bytes match { 113 | case b if Option(b).isEmpty => "" //ick 114 | case b => new String(bytes, "UTF-8") 115 | } 116 | } 117 | -------------------------------------------------------------------------------- /src/main/scala/com/tuplejump/embedded/kafka/Events.scala: -------------------------------------------------------------------------------- 1 | /* 2 | * Copyright 2016 Tuplejump 3 | * 4 | * Licensed under the Apache License, Version 2.0 (the "License"); 5 | * you may not use this file except in compliance with the License. 6 | * You may obtain a copy of the License at 7 | * 8 | * http://www.apache.org/licenses/LICENSE-2.0 9 | * 10 | * Unless required by applicable law or agreed to in writing, software 11 | * distributed under the License is distributed on an "AS IS" BASIS, 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 | * See the License for the specific language governing permissions and 14 | * limitations under the License. 15 | */ 16 | 17 | package com.tuplejump.embedded.kafka 18 | 19 | object Events { 20 | sealed trait Task extends Serializable 21 | case object PublishTask extends Task 22 | 23 | sealed trait Bufferable[A] extends Serializable { 24 | def data: Iterable[A] 25 | } 26 | final case class SampleEvent(data: AnyRef*) 27 | final case class PublishTo[A](topic: String, data: A*) extends Bufferable[A] 28 | } 29 | -------------------------------------------------------------------------------- /src/main/scala/com/tuplejump/embedded/kafka/Settings.scala: -------------------------------------------------------------------------------- 1 | /* 2 | * Copyright 2016 Tuplejump 3 | * 4 | * Licensed under the Apache License, Version 2.0 (the "License"); 5 | * you may not use this file except in compliance with the License. 6 | * You may obtain a copy of the License at 7 | * 8 | * http://www.apache.org/licenses/LICENSE-2.0 9 | * 10 | * Unless required by applicable law or agreed to in writing, software 11 | * distributed under the License is distributed on an "AS IS" BASIS, 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 | * See the License for the specific language governing permissions and 14 | * limitations under the License. 15 | */ 16 | 17 | package com.tuplejump.embedded.kafka 18 | 19 | import java.util.Properties 20 | 21 | import scala.collection.JavaConverters._ 22 | 23 | /** 24 | * TODO remove hard coded, defaults, add config. 25 | * * Replication configurations * 26 | * "num.replica.fetchers" -> "4", 27 | * "replica.fetch.max.bytes=1048576 28 | * "replica.fetch.wait.max.ms=500 29 | * "replica.high.watermark.checkpoint.interval.ms=5000 30 | * "replica.socket.timeout.ms=30000 31 | * "replica.socket.receive.buffer.bytes=65536 32 | * "replica.lag.time.max.ms=10000 33 | 34 | * "controller.socket.timeout.ms=30000 35 | * "controller.message.queue.size=10 36 | 37 | * * Log configuration * 38 | * "num.partitions" -> "8", 39 | * "message.max.bytes" -> "1000000", 40 | * "auto.create.topics.enable" -> "true", 41 | * "log.index.interval.bytes" -> "4096", 42 | * "log.index.size.max.bytes" -> "10485760", 43 | * "log.retention.hours" -> "168", 44 | * "log.flush.interval.ms" -> "10000", 45 | * "log.flush.interval.messages" -> "20000", 46 | * "log.flush.scheduler.interval.ms" -> "2000", 47 | * "log.roll.hours" -> "168", 48 | * "log.retention.check.interval.ms" -> "300000", 49 | * "log.segment.bytes" -> "1073741824", 50 | 51 | * * ZK configuration * 52 | * "zookeeper.connection.timeout.ms" -> "6000", 53 | * "zookeeper.sync.time.ms" -> "2000", 54 | 55 | * * Socket server configuration * 56 | * "num.io.threads" -> "8", 57 | * "num.network.threads" -> "8", 58 | * "socket.request.max.bytes" -> "104857600", 59 | * "socket.receive.buffer.bytes" -> "1048576", 60 | * "socket.send.buffer.bytes" -> "1048576", 61 | * "queued.max.requests" -> "16", 62 | * "fetch.purgatory.purge.interval.requests" -> "100", 63 | * "producer.purgatory.purge.interval.requests" -> "100" 64 | */ 65 | trait Settings { 66 | 67 | def brokerConfig(kafkaConnect: String, zkConnect: String, logDir: String): Map[String, String] = { 68 | val seed = kafkaConnect.split(",").head.split(":").head //TODO cleanup 69 | Map( 70 | //"broker.id" -> "0", 71 | "host.name" -> kafkaConnect.split(",").head.split(":").head, //TODO cleanup, 72 | "metadata.broker.list" -> kafkaConnect, 73 | "advertised.host.name" -> seed, 74 | "advertised.port" -> "9092", 75 | "log.dir" -> logDir, 76 | "log.dirs" -> logDir, 77 | "zookeeper.connect" -> zkConnect, 78 | "replica.high.watermark.checkpoint.interval.ms" -> "5000", 79 | "log.flush.interval.messages" -> "1", 80 | "replica.socket.timeout.ms" -> "1500", 81 | "controlled.shutdown.enable" -> "true" 82 | ) 83 | } 84 | 85 | def producerConfig(kafkaConnect: String, kSerializer: Class[_], vSerializer: Class[_]): Map[String, String] = 86 | Map( 87 | "metadata.broker.list" -> kafkaConnect,//bug? fails if not set, warns if is 88 | "bootstrap.servers" -> kafkaConnect, 89 | "key.serializer" -> kSerializer.getName, 90 | "value.serializer" -> vSerializer.getName 91 | ) 92 | 93 | /** offsetPolicy = latest,earliest,none */ 94 | def consumerConfig(group: String, 95 | kafkaConnect: String, 96 | zkConnect: String, 97 | offsetPolicy: String, 98 | autoCommitEnabled: Boolean, 99 | kDeserializer: Class[_], 100 | vDeserializer: Class[_]): Map[String, String] = 101 | Map( 102 | "bootstrap.servers" -> kafkaConnect, 103 | "group.id" -> group, 104 | "auto.offset.reset" -> offsetPolicy, 105 | "enable.auto.commit" -> autoCommitEnabled.toString, 106 | "key.deserializer" -> kDeserializer.getName, 107 | "value.deserializer" -> vDeserializer.getName, 108 | "zookeeper.connect" -> zkConnect) 109 | 110 | 111 | def kafkaParams(group: String, 112 | kafkaConnect: String, 113 | zkConnect: String, 114 | offsetPolicy: String, 115 | autoCommitEnabled: Boolean, 116 | kDeserializer: Class[_], 117 | vDeserializer: Class[_]): Map[String, String] = 118 | consumerConfig(group, kafkaConnect, zkConnect, offsetPolicy, autoCommitEnabled, kDeserializer, vDeserializer) 119 | 120 | def mapToProps(values: Map[String, String]): Properties = { 121 | val props = new Properties() 122 | props.putAll(values.asJava) 123 | props 124 | } 125 | } 126 | -------------------------------------------------------------------------------- /src/main/scala/com/tuplejump/embedded/kafka/package.scala: -------------------------------------------------------------------------------- 1 | /* 2 | * Copyright 2016 Tuplejump 3 | * 4 | * Licensed under the Apache License, Version 2.0 (the "License"); 5 | * you may not use this file except in compliance with the License. 6 | * You may obtain a copy of the License at 7 | * 8 | * http://www.apache.org/licenses/LICENSE-2.0 9 | * 10 | * Unless required by applicable law or agreed to in writing, software 11 | * distributed under the License is distributed on an "AS IS" BASIS, 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 | * See the License for the specific language governing permissions and 14 | * limitations under the License. 15 | */ 16 | 17 | package com.tuplejump.embedded 18 | 19 | package object kafka { 20 | 21 | 22 | final val DefaultZkPort: Int = 2181 23 | 24 | final val DefaultKafkaPort: Int = 9092 25 | 26 | final val DefaultHostString: String = "127.0.0.1" //DefaultHost.getHostAddress 27 | 28 | final val DefaultZookeeperConnect: String = s"$DefaultHostString:$DefaultZkPort" 29 | 30 | final val DefaultKafkaConnect: String = s"$DefaultHostString:$DefaultKafkaPort" 31 | 32 | final val DefaultGroupId: String = s"consumer-${scala.util.Random.nextInt(10000)}" 33 | 34 | } 35 | -------------------------------------------------------------------------------- /src/test/scala/com/tuplejump/embedded/kafka/AbstractSpec.scala: -------------------------------------------------------------------------------- 1 | /* 2 | * Copyright 2016 Tuplejump 3 | * 4 | * Licensed under the Apache License, Version 2.0 (the "License"); 5 | * you may not use this file except in compliance with the License. 6 | * You may obtain a copy of the License at 7 | * 8 | * http://www.apache.org/licenses/LICENSE-2.0 9 | * 10 | * Unless required by applicable law or agreed to in writing, software 11 | * distributed under the License is distributed on an "AS IS" BASIS, 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 | * See the License for the specific language governing permissions and 14 | * limitations under the License. 15 | */ 16 | 17 | package com.tuplejump.embedded.kafka 18 | 19 | import org.scalatest._ 20 | 21 | /** Basic unit test abstraction. */ 22 | trait AbstractSpec extends WordSpecLike with Matchers with BeforeAndAfter with BeforeAndAfterAll 23 | 24 | trait FunctionalSpec extends Suite with FreeSpecLike with Matchers with BeforeAndAfter with BeforeAndAfterAll 25 | -------------------------------------------------------------------------------- /src/test/scala/com/tuplejump/embedded/kafka/SimpleConsumer.scala: -------------------------------------------------------------------------------- 1 | /* 2 | * Copyright 2016 Tuplejump 3 | * 4 | * Licensed under the Apache License, Version 2.0 (the "License"); 5 | * you may not use this file except in compliance with the License. 6 | * You may obtain a copy of the License at 7 | * 8 | * http://www.apache.org/licenses/LICENSE-2.0 9 | * 10 | * Unless required by applicable law or agreed to in writing, software 11 | * distributed under the License is distributed on an "AS IS" BASIS, 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 | * See the License for the specific language governing permissions and 14 | * limitations under the License. 15 | */ 16 | 17 | package com.tuplejump.embedded.kafka 18 | 19 | import java.util.Properties 20 | import java.util.concurrent.{CountDownLatch, Executors} 21 | 22 | import scala.util.Try 23 | import kafka.serializer.StringDecoder 24 | import kafka.consumer.{ Consumer, ConsumerConfig } 25 | 26 | /** 27 | * Very simple consumer of a single Kafka topic. 28 | * TODO this is the old consumer. Update to new consumer. 29 | */ 30 | class SimpleConsumer( 31 | val latch: CountDownLatch, 32 | consumerConfig: Map[String, String], 33 | topic: String, 34 | groupId: String, 35 | partitions: Int, 36 | numThreads: Int) { 37 | 38 | val connector = Consumer.create(createConsumerConfig) 39 | 40 | val streams = connector 41 | .createMessageStreams(Map(topic -> partitions), new StringDecoder(), new StringDecoder()) 42 | .get(topic) 43 | 44 | val executor = Executors.newFixedThreadPool(numThreads) 45 | 46 | for (stream <- streams) { 47 | executor.submit(new Runnable() { 48 | def run(): Unit = { 49 | for (s <- stream) { 50 | while (s.iterator.hasNext) { 51 | latch.countDown() 52 | } 53 | } 54 | } 55 | }) 56 | } 57 | 58 | private def createConsumerConfig: ConsumerConfig = { 59 | import scala.collection.JavaConverters._ 60 | val props = new Properties() 61 | props.putAll(consumerConfig.asJava) 62 | new ConsumerConfig(props) 63 | } 64 | 65 | def shutdown(): Unit = Try { 66 | connector.shutdown() 67 | executor.shutdown() 68 | } 69 | } 70 | -------------------------------------------------------------------------------- /version.sbt: -------------------------------------------------------------------------------- 1 | 2 | version in ThisBuild := "0.0.6" --------------------------------------------------------------------------------