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package xyz.driver.core.rest
import akka.actor.ActorSystem
import akka.http.scaladsl.model._
import akka.http.scaladsl.model.headers.RawHeader
import akka.http.scaladsl.unmarshalling.Unmarshal
import com.typesafe.scalalogging.Logger
import org.slf4j.MDC
import xyz.driver.core.Name
import xyz.driver.core.time.provider.TimeProvider
import scala.concurrent.{ExecutionContext, Future}
import scala.util.{Failure, Success}
class HttpRestServiceTransport(applicationName: Name[App],
applicationVersion: String,
actorSystem: ActorSystem,
executionContext: ExecutionContext,
log: Logger,
time: TimeProvider)
extends ServiceTransport {
protected implicit val execution: ExecutionContext = executionContext
protected val httpClient: HttpClient = new SingleRequestHttpClient(applicationName, applicationVersion, actorSystem)
def sendRequestGetResponse(context: ServiceRequestContext)(requestStub: HttpRequest): Future[HttpResponse] = {
val requestTime = time.currentTime()
val request = requestStub
.withHeaders(context.contextHeaders.toSeq.map {
case (ContextHeaders.TrackingIdHeader, _) =>
RawHeader(ContextHeaders.TrackingIdHeader, context.trackingId)
case (ContextHeaders.StacktraceHeader, _) =>
RawHeader(ContextHeaders.StacktraceHeader,
Option(MDC.get("stack"))
.orElse(context.contextHeaders.get(ContextHeaders.StacktraceHeader))
.getOrElse(""))
case (header, headerValue) => RawHeader(header, headerValue)
}: _*)
log.info(s"Sending request to ${request.method} ${request.uri}")
val response = httpClient.makeRequest(request)
response.onComplete {
case Success(r) =>
val responseLatency = requestTime.durationTo(time.currentTime())
log.info(s"Response from ${request.uri} to request $requestStub is successful in $responseLatency ms: $r")
case Failure(t: Throwable) =>
val responseLatency = requestTime.durationTo(time.currentTime())
log.info(s"Failed to receive response from ${request.method} ${request.uri} in $responseLatency ms", t)
log.warn(s"Failed to receive response from ${request.method} ${request.uri} in $responseLatency ms", t)
}(executionContext)
response
}
def sendRequest(context: ServiceRequestContext)(requestStub: HttpRequest): Future[Unmarshal[ResponseEntity]] = {
sendRequestGetResponse(context)(requestStub) map { response =>
if (response.status == StatusCodes.NotFound) {
Unmarshal(HttpEntity.Empty: ResponseEntity)
} else if (response.status.isFailure()) {
throw new Exception(s"Http status is failure ${response.status} for ${requestStub.method} ${requestStub.uri}")
} else {
Unmarshal(response.entity)
}
}
}
}
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