ZIO learning - zhttp - streaming from a java stream / published by https://github.com/dacr/code-examples-manager #de9fa625-5d52-4e22-99de-bb847c7a8353/f73748eb384e0f83269507376e342838acbc7492

zio-learning-zhttp-server-streaming-2.sc

// summary : ZIO learning - zhttp - streaming from a java stream
// keywords : scala, zio, learning, pure-functional, http-server, zhttp, streams, @testable, @exclusive, @fail
// publish : gist
// authors : David Crosson
// license : Apache License Version 2.0 (https://www.apache.org/licenses/LICENSE-2.0.txt)
// id : de9fa625-5d52-4e22-99de-bb847c7a8353
// created-on : 2024-01-05T18:44:19+01:00
// managed-by : https://github.com/dacr/code-examples-manager
// run-with : scala-cli $file
// test-with : curl http://127.0.0.1:8080/

// ---------------------
//> using scala "3.4.2"
//> using dep "dev.zio::zio-http:3.0.0-RC4"
// ---------------------

import zio.*, zio.http.*, zio.stream.*
import java.util.stream.{Stream => JStream}

// SEE https://github.com/zio/zio-http/issues/2584

object Main extends ZIOAppDefault {
  def getJavaStream: Task[JStream[String]] = ZIO.attempt {
    throw RuntimeException("failure")
    //JStream.of("1", "2", "3", "4")
  }

  override def run =
    for {
      _     <- ZIO.logInfo("started")
      stream = ZStream.fromJavaStreamZIO(getJavaStream).flatMap(s => ZStream.fromIterable(s.getBytes))
      app    = Routes(Method.GET / "stream" -> handler(Response(body = Body.fromStream(stream)))).toHttpApp
      _     <- Server.serve(app).provide(Server.default)
    } yield ()
}

Main.main(args)