Kafka in Scala REPL for Interactive Exploration

Use the following build.sbt and execute sbt followed by console command (while inside the sbt shell).

The reason for executing console command after sbt has started up is that command history did not work using the key-up and key-down keys. YMMV
name := "kafka-sandbox"

version := "1.0"

scalaVersion := "2.12.3"

//val kafkaVer = ""
resolvers += Resolver.mavenLocal
val kafkaVer = "1.0.0-SNAPSHOT"
libraryDependencies += "org.apache.kafka" % "kafka-clients" % kafkaVer
libraryDependencies += "org.apache.kafka" %% "kafka" % kafkaVer

val logback = "1.2.3"
libraryDependencies += "ch.qos.logback" % "logback-core" % logback
libraryDependencies += "ch.qos.logback" % "logback-classic" % logback
sbt with console command
➜  kafka-sandbox sbt
[info] Loading settings from plugins.sbt ...
[info] Loading project definition from /Users/jacek/dev/sandbox/kafka-sandbox/project
[info] Loading settings from build.sbt ...
[info] Set current project to kafka-sandbox (in build file:/Users/jacek/dev/sandbox/kafka-sandbox/)
[info] sbt server started at
sbt:kafka-sandbox> console
[info] Starting scala interpreter...
Welcome to Scala 2.12.3 (Java HotSpot(TM) 64-Bit Server VM, Java 1.8.0_144).
Type in expressions for evaluation. Or try :help.

scala> import kafka.utils._
import kafka.utils._

scala> ZkUtils.controllerZkData(1, System.currentTimeMillis())
res0: String = {"version":1,"brokerid":1,"timestamp":"1506162122097"}

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