assembling fat jar

build.sbt

@@ -11,3 +11,22 @@ libraryDependencies ++= Seq(
 
 // new repo on maven.org
 libraryDependencies += "com.github.etaty" %% "rediscala" % "1.6.0"
+
+lazy val commonSettings = Seq(
+  version := "0.1-SNAPSHOT",
+  organization := "com.example",
+  scalaVersion := "2.10.1",
+  test in assembly := {}
+)
+
+lazy val app = (project in file("app")).
+  settings(commonSettings: _*).
+  settings(
+    mainClass in assembly := Some("com.example.Server")
+  )
+
+lazy val utils = (project in file("utils")).
+  settings(commonSettings: _*).
+  settings(
+    assemblyJarName in assembly := "akka-http-redis.jar"
+  )

project/assembly.sbt

@@ -0,0 +1 @@
+addSbtPlugin("com.eed3si9n" % "sbt-assembly" % "0.14.3")

src/main/scala/com/example/Server.scala

@@ -28,7 +28,7 @@ object Server {
           val maybeItem: Future[Option[ByteString]] = redis.get(key.toString)
 
           onSuccess(maybeItem) {
-            case Some(item) => complete(HttpEntity(ContentTypes.`application/json`, s"""{"key": $key, "value": "$item"}"""))
+            case Some(item) => complete(HttpEntity(ContentTypes.`application/json`, s"""{"key": $key, "value": "${item.utf8String}"}"""))
             case None       => complete(StatusCodes.NoContent)
           }
         }