/* =========================================================================================
* Copyright © 2013-2014 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.play
import javax.inject.Inject
import kamon.Kamon
import kamon.metric.instrument.CollectionContext
import kamon.play.action.TraceName
import kamon.trace.TraceLocal.HttpContextKey
import kamon.trace.{ Tracer, TraceLocal }
import org.scalatestplus.play._
import play.api.DefaultGlobal
import play.api.http.{ HttpErrorHandler, Writeable }
import play.api.libs.concurrent.Execution.Implicits.defaultContext
import play.api.libs.ws.WS
import play.api.mvc.Results.Ok
import play.api.mvc._
import play.api.routing.SimpleRouter
import play.api.test.Helpers._
import play.api.test._
import play.core.routing._
import play.api.http.HttpFilters
import scala.concurrent.duration._
import scala.concurrent.{ Await, Future }
class RequestInstrumentationSpec extends PlaySpec with OneServerPerSuite {
System.setProperty("config.file", "./kamon-play/src/test/resources/conf/application.conf")
override lazy val port: Port = 19002
val executor = scala.concurrent.ExecutionContext.Implicits.global
implicit override lazy val app = FakeApplication(withRoutes = {
case ("GET", "/async") ⇒
Action.async {
Future {
Ok("Async.async")
}(executor)
}
case ("GET", "/notFound") ⇒
Action {
Results.NotFound
}
case ("GET", "/error") ⇒
Action {
throw new Exception("This page generates an error!")
Ok("This page will generate an error!")
}
case ("GET", "/redirect") ⇒
Action {
Results.Redirect("/redirected", MOVED_PERMANENTLY)
}
case ("GET", "/default") ⇒
Action {
Ok("default")
}
case ("GET", "/async-renamed") ⇒
TraceName("renamed-trace") {
Action.async {
Future {
Ok("Async.async")
}(executor)
}
}
case ("GET", "/retrieve") ⇒
Action {
Ok("retrieve from TraceLocal")
}
}, additionalConfiguration = Map(
("application.router", "kamon.play.Routes"),
("play.http.filters", "kamon.play.TestHttpFilters"),
("play.http.requestHandler", "play.api.http.DefaultHttpRequestHandler"),
("logger.root", "OFF"),
("logger.play", "OFF"),
("logger.application", "OFF")))
val traceTokenValue = "kamon-trace-token-test"
val traceTokenHeaderName = "X-Trace-Token"
val expectedToken = Some(traceTokenValue)
val traceTokenHeader = traceTokenHeaderName -> traceTokenValue
val traceLocalStorageValue = "localStorageValue"
val traceLocalStorageKey = "localStorageKey"
val traceLocalStorageHeader = traceLocalStorageKey -> traceLocalStorageValue
"the Request instrumentation" should {
"respond to the Async Action with X-Trace-Token" in {
val Some(result) = route(FakeRequest(GET, "/async").withHeaders(traceTokenHeader, traceLocalStorageHeader))
header(traceTokenHeaderName, result) must be(expectedToken)
}
"respond to the NotFound Action with X-Trace-Token" in {
val Some(result) = route(FakeRequest(GET, "/notFound").withHeaders(traceTokenHeader))
header(traceTokenHeaderName, result) must be(expectedToken)
}
"respond to the Default Action with X-Trace-Token" in {
val Some(result) = route(FakeRequest(GET, "/default").withHeaders(traceTokenHeader))
header(traceTokenHeaderName, result) must be(expectedToken)
}
"respond to the Redirect Action with X-Trace-Token" in {
val Some(result) = route(FakeRequest(GET, "/redirect").withHeaders(traceTokenHeader))
header("Location", result) must be(Some("/redirected"))
header(traceTokenHeaderName, result) must be(expectedToken)
}
"respond to the Async Action with X-Trace-Token and the renamed trace" in {
val result = Await.result(route(FakeRequest(GET, "/async-renamed").withHeaders(traceTokenHeader)).get, 10 seconds)
Tracer.currentContext.name must be("renamed-trace")
Some(result.header.headers(traceTokenHeaderName)) must be(expectedToken)
}
"propagate the TraceContext and LocalStorage through of filters in the current request" in {
route(FakeRequest(GET, "/retrieve").withHeaders(traceTokenHeader, traceLocalStorageHeader))
TraceLocal.retrieve(TraceLocalKey).get must be(traceLocalStorageValue)
}
"response to the getRouted Action and normalise the current TraceContext name" in {
Await.result(WS.url(s"http://localhost:$port/getRouted").get(), 10 seconds)
Kamon.metrics.find("getRouted.get", "trace") must not be empty
}
"response to the postRouted Action and normalise the current TraceContext name" in {
Await.result(WS.url(s"http://localhost:$port/postRouted").post("content"), 10 seconds)
Kamon.metrics.find("postRouted.post", "trace") must not be empty
}
"response to the showRouted Action and normalise the current TraceContext name" in {
Await.result(WS.url(s"http://localhost:$port/showRouted/2").get(), 10 seconds)
Kamon.metrics.find("show.some.id.get", "trace") must not be empty
}
"record http server metrics for all processed requests" in {
val collectionContext = CollectionContext(100)
Kamon.metrics.find("play-server", "http-server").get.collect(collectionContext)
for (repetition ← 1 to 10) {
Await.result(route(FakeRequest(GET, "/default").withHeaders(traceTokenHeader)).get, 10 seconds)
}
for (repetition ← 1 to 5) {
Await.result(route(FakeRequest(GET, "/notFound").withHeaders(traceTokenHeader)).get, 10 seconds)
}
for (repetition ← 1 to 5) {
Await.result(routeWithOnError(FakeRequest(GET, "/error").withHeaders(traceTokenHeader)).get, 10 seconds)
}
val snapshot = Kamon.metrics.find("play-server", "http-server").get.collect(collectionContext)
snapshot.counter("GET: /default_200").get.count must be(10)
snapshot.counter("GET: /notFound_404").get.count must be(5)
snapshot.counter("GET: /error_500").get.count must be(5)
snapshot.counter("200").get.count must be(10)
snapshot.counter("404").get.count must be(5)
snapshot.counter("500").get.count must be(5)
}
}
def routeWithOnError[T](req: Request[T])(implicit w: Writeable[T]): Option[Future[Result]] = {
route(req).map { result ⇒
result.recoverWith {
case t: Throwable ⇒ DefaultGlobal.onError(req, t)
}
}
}
}
object TraceLocalKey extends TraceLocal.TraceLocalKey {
type ValueType = String
}
class TraceLocalFilter extends Filter {
val traceLocalStorageValue = "localStorageValue"
val traceLocalStorageKey = "localStorageKey"
val traceLocalStorageHeader = traceLocalStorageKey -> traceLocalStorageValue
override def apply(next: (RequestHeader) ⇒ Future[Result])(header: RequestHeader): Future[Result] = {
Tracer.withContext(Tracer.currentContext) {
TraceLocal.store(TraceLocalKey)(header.headers.get(traceLocalStorageKey).getOrElse("unknown"))
next(header).map {
result ⇒
{
result.withHeaders(traceLocalStorageKey -> TraceLocal.retrieve(TraceLocalKey).get)
}
}
}
}
}
class TestHttpFilters @Inject() (traceLocalFilter: TraceLocalFilter) extends HttpFilters {
val filters = Seq(traceLocalFilter)
}
class Routes @Inject() (application: controllers.Application) extends GeneratedRouter with SimpleRouter {
val prefix = "/"
lazy val defaultPrefix = {
if (prefix.endsWith("/")) "" else "/"
}
// Gets
private[this] lazy val Application_getRouted =
Route("GET", PathPattern(List(StaticPart(prefix), StaticPart(defaultPrefix), StaticPart("getRouted"))))
private[this] lazy val Application_show =
Route("GET", PathPattern(List(StaticPart(prefix), StaticPart(defaultPrefix), StaticPart("showRouted/"), DynamicPart("id", """[^/]+""", encodeable = true))))
//Posts
private[this] lazy val Application_postRouted =
Route("POST", PathPattern(List(StaticPart(prefix), StaticPart(defaultPrefix), StaticPart("postRouted"))))
def routes: PartialFunction[RequestHeader, Handler] = {
case Application_getRouted(params) ⇒ call {
createInvoker(application.getRouted,
HandlerDef(this.getClass.getClassLoader, "", "controllers.Application", "getRouted", Nil, "GET", """some comment""", prefix + """getRouted""")).call(application.getRouted)
}
case Application_postRouted(params) ⇒ call {
createInvoker(application.postRouted,
HandlerDef(this.getClass.getClassLoader, "", "controllers.Application", "postRouted", Nil, "POST", """some comment""", prefix + """postRouted""")).call(application.postRouted)
}
case Application_show(params) ⇒ call(params.fromPath[Int]("id", None)) { (id) ⇒
createInvoker(application.showRouted(id),
HandlerDef(this.getClass.getClassLoader, "", "controllers.Application", "showRouted", Seq(classOf[Int]), "GET", """""", prefix + """show/some/$id<[^/]+>""")).call(application.showRouted(id))
}
}
override def errorHandler: HttpErrorHandler = new HttpErrorHandler() {
override def onClientError(request: RequestHeader, statusCode: Int, message: String): Future[Result] = Future.successful(Results.InternalServerError)
override def onServerError(request: RequestHeader, exception: Throwable): Future[Result] = Future.successful(Results.InternalServerError)
}
}
object controllers {
import play.api.mvc._
class Application extends Controller {
val postRouted = Action {
Ok("invoked postRouted")
}
val getRouted = Action {
Ok("invoked getRouted")
}
def showRouted(id: Int) = Action {
Ok("invoked show with: " + id)
}
}
}