=doc #3689 Make activator templates for camel samples

* @rkuhn found the problems in the scala camel samples
  - HttpSample returns scrambled data
  - CustomRouteSample times out

akka-samples/akka-sample-camel-scala/src/main/scala/sample/camel/CustomRouteExample.scala

@@ -0,0 +1,58 @@
+package sample.camel
+
+import org.apache.camel.Exchange
+import org.apache.camel.Processor
+import org.apache.camel.builder.RouteBuilder
+import akka.actor.Actor
+import akka.actor.ActorRef
+import akka.actor.ActorSystem
+import akka.actor.Props
+import akka.camel.CamelExtension
+import akka.camel.CamelMessage
+import akka.camel.Consumer
+import akka.camel.Producer
+
+object CustomRouteExample {
+
+  def main(args: Array[String]): Unit = {
+    val system = ActorSystem("some-system")
+    val producer = system.actorOf(Props[RouteProducer])
+    val mediator = system.actorOf(Props(classOf[RouteTransformer], producer))
+    val consumer = system.actorOf(Props(classOf[RouteConsumer], mediator))
+    CamelExtension(system).context.addRoutes(new CustomRouteBuilder)
+  }
+
+  class RouteConsumer(transformer: ActorRef) extends Actor with Consumer {
+    def endpointUri = "jetty:http://0.0.0.0:8877/camel/welcome"
+
+    def receive = {
+      // Forward a string representation of the message body to transformer
+      case msg: CamelMessage => transformer.forward(msg.withBodyAs[String])
+    }
+  }
+
+  class RouteTransformer(producer: ActorRef) extends Actor {
+    def receive = {
+      // example: transform message body "foo" to "- foo -" and forward result
+      // to producer
+      case msg: CamelMessage =>
+        producer.forward(msg.mapBody((body: String) => "- %s -" format body))
+    }
+  }
+
+  class RouteProducer extends Actor with Producer {
+    def endpointUri = "direct:welcome"
+  }
+
+  class CustomRouteBuilder extends RouteBuilder {
+    def configure {
+      from("direct:welcome").process(new Processor() {
+        def process(exchange: Exchange) {
+          // Create a 'welcome' message from the input message
+          exchange.getOut.setBody("Welcome %s" format exchange.getIn.getBody)
+        }
+      })
+    }
+  }
+
+}