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/*
* =========================================================================================
* Copyright © 2013 the kamon project <http://kamon.io/>
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software distributed under the
* License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
* either express or implied. See the License for the specific language governing permissions
* and limitations under the License.
* =========================================================================================
*/
package kamon.docs.trace
import akka.actor._
import akka.testkit.{ImplicitSender, TestKit}
import org.scalatest.WordSpecLike
import kamon.trace.TraceRecorder
class SimpleContextPropagation extends TestKit(ActorSystem("simple-context-propagation"))
with WordSpecLike with ImplicitSender {
"Kamon propagates the TraceContext when sending messages between actors" in {
val upperCaser = system.actorOf(Props[UpperCaser], "upper-caser")
for(_ <- 1 to 5) {
upperCaser ! s"Hello without context"
}
expectMsgAllOf(21, 21, 21, 21, 21)
for(_ <- 1 to 5) {
TraceRecorder.withNewTraceContext("simple-test") {
upperCaser ! "Hello World with TraceContext"
}
}
expectMsgAllOf(29, 29, 29, 29, 29)
}
}
class UpperCaser extends Actor with ActorLogging {
val lengthCalculator = context.actorOf(Props[LengthCalculator], "length-calculator")
def receive = {
case anyString: String =>
log.info("Upper casing [{}]", anyString)
lengthCalculator.forward(anyString.toUpperCase)
}
}
class LengthCalculator extends Actor with ActorLogging {
def receive = {
case anyString: String =>
log.info("Calculating the length of: [{}]", anyString)
sender ! anyString.length
}
}
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