All producers are now closed on JVM exit.

README.md

@@ -1,13 +1,13 @@
 # scalatest-embedded-kafka
-A library that provides an in-memory Kafka broker to run your ScalaTest specs against. It uses Kafka 0.8.2.1 and ZooKeeper 3.4.6.
+A library that provides an in-memory Kafka broker to run your ScalaTest specs against. It uses Kafka 0.8.2.2 and ZooKeeper 3.4.6.
 
 Inspired by https://github.com/chbatey/kafka-unit
 
 ## How to use
 
 scalatest-embedded-kafka is available on Bintray and Maven Central, compiled for both Scala 2.10 and 2.11
 
-* In your `build.sbt` file add the following dependency: `"net.manub" %% "scalatest-embedded-kafka" % "0.3.0" % "test"`
+* In your `build.sbt` file add the following dependency: `"net.manub" %% "scalatest-embedded-kafka" % "0.4.1" % "test"`
 * Have your `Spec` extend the `EmbeddedKafka` trait.
 * Enclose the code that needs a running instance of Kafka within the `withRunningKafka` closure.
 

src/main/scala/net/manub/embeddedkafka/EmbeddedKafka.scala

@@ -161,14 +161,26 @@ sealed trait EmbeddedKafkaSupport {
   }
 
   object aKafkaProducer {
+    private[this] var producers = Vector.empty[KafkaProducer[_, _]]
+
+    sys.addShutdownHook {
+      producers.foreach(_.close())
+    }
+
     def thatSerializesValuesWith[V](serializer: Class[_ <: Serializer[V]])(implicit config: EmbeddedKafkaConfig) = {
-      new KafkaProducer[String, V](basicKafkaConfig(config) +(
+      val producer = new KafkaProducer[String, V](basicKafkaConfig(config) + (
         ProducerConfig.KEY_SERIALIZER_CLASS_CONFIG -> classOf[StringSerializer].getName,
-        ProducerConfig.VALUE_SERIALIZER_CLASS_CONFIG -> serializer.getName))
+        ProducerConfig.VALUE_SERIALIZER_CLASS_CONFIG -> serializer.getName)
+      )
+      producers :+= producer
+      producer
     }
 
-    def apply[V](implicit valueSerializer: Serializer[V], config: EmbeddedKafkaConfig) =
-      new KafkaProducer[String, V](basicKafkaConfig(config), new StringSerializer, valueSerializer)
+    def apply[V](implicit valueSerializer: Serializer[V], config: EmbeddedKafkaConfig) = {
+      val producer = new KafkaProducer[String, V](basicKafkaConfig(config), new StringSerializer, valueSerializer)
+      producers :+= producer
+      producer
+    }
 
     def basicKafkaConfig[V](config: EmbeddedKafkaConfig): Map[String, String] = Map(
       ProducerConfig.BOOTSTRAP_SERVERS_CONFIG -> s"localhost:${config.kafkaPort}",

version.sbt

@@ -1 +1 @@
-version in ThisBuild := "0.5.0-SNAPSHOT"
+version in ThisBuild := "0.4.1-SNAPSHOT"