Small library, that provides interop between akka-http and ZIO: you'll be able to use ZIO values in your akka-http routes instead of Futures
Include zio-akka-http-interop in your build:
libraryDependencies += "io.scalac" %% "zio-akka-http-interop" % "0.6.0"
Then just mix akka.http.interop.ZIOSupport into the class, that defines your routes:
import akka.http.interop.ZIOSupport
import akka.http.scaladsl.server.Route
import akka.http.scaladsl.server.Directives._
import zio._
object Api extends ZIOSupport {
val routes: Route =
pathPrefix("a") {
get {
val res: Task[String] = ZIO.succeed("OK")
complete(res)
}
}
}This will work with Throwable on the error channel.
If you want to use ZIO values with custom error type, you'll need some additional setup: interop code will have to know how to translate your domain error into HttpResponse.
You can provide that knowledge by defining an akka.http.interop.ErrorResponse typeclass instance:
import akka.http.interop._
import akka.http.scaladsl.model.{ HttpResponse, StatusCodes }
import akka.http.scaladsl.server.Directives._
import akka.http.scaladsl.server.Route
import zio.{ IO, ZIO }
object Api extends ZIOSupport {
sealed trait DomainError
case object FatalError extends DomainError
case object BadData extends DomainError
implicit val domainErrorResponse: ErrorResponse[DomainError] = {
case FatalError => HttpResponse(StatusCodes.InternalServerError)
case BadData => HttpResponse(StatusCodes.BadRequest)
}
val routes: Route =
pathPrefix("ok") {
get {
val res: IO[DomainError, String] = ZIO.succeed("OK")
complete(res)
}
} ~ pathPrefix("internal_server_error") {
get {
val res: IO[DomainError, String] = ZIO.fail(FatalError)
complete(res)
}
} ~
pathPrefix("bad_request") {
get {
val res: IO[DomainError, String] = ZIO.fail(BadData)
complete(res)
}
}
}Developed by Scalac