3 changed files with 168 additions and 33 deletions
@ -0,0 +1,18 @@ |
|||
var i = 0; |
|||
|
|||
console.log("Starting worker") |
|||
onmessage = (ev) => { |
|||
console.log(`Worker received data ${ev.data}`) |
|||
const data = JSON.parse(ev.data) |
|||
postMessage(JSON.stringify({ data: data.data * 2 })) |
|||
} |
|||
|
|||
// function timedCount() {
|
|||
// i = i + 1;
|
|||
// postMessage(JSON.stringify({ data: i }));
|
|||
// setTimeout("timedCount()", 2000);
|
|||
|
|||
|
|||
// }
|
|||
|
|||
// timedCount();
|
|||
@ -0,0 +1,122 @@ |
|||
package outwatchapp.util.reactive |
|||
|
|||
import scala.concurrent.Future |
|||
|
|||
import io.circe.Decoder |
|||
import io.circe.Encoder |
|||
import io.circe.Printer |
|||
import io.circe.generic.JsonCodec |
|||
import io.circe.parser._ |
|||
import io.circe.syntax._ |
|||
import monix.bio.Task |
|||
import monix.execution.Ack |
|||
import monix.execution.Cancelable |
|||
import monix.reactive.Observable |
|||
import monix.reactive.Observer |
|||
import monix.reactive.OverflowStrategy |
|||
import outwatchapp.util.reactive.MonixProSubject |
|||
import org.scalajs.dom.raw.Event |
|||
import org.scalajs.dom.raw.MessageEvent |
|||
import org.scalajs.dom.{raw => sjsdr} |
|||
|
|||
class WebWorkerImpl[T <: Product: Encoder: Decoder]( |
|||
worker: sjsdr.Worker, |
|||
overflowStrategy: OverflowStrategy.Synchronous[T] |
|||
) { |
|||
|
|||
// private def parseFn(data: T) = { |
|||
// data match { |
|||
// case _: AnyRef => parseRef(data) |
|||
// case s: String => |
|||
// case other => |
|||
// println(other) |
|||
// Left(WebWorker.Error) |
|||
// } |
|||
// } |
|||
|
|||
// private def parseRef(data: T): Either[WebWorker.Error, T] = { |
|||
// data match { |
|||
// case s: String => decode[T](s).leftMap(_ => WebWorker.Error) |
|||
// case a: Int => |
|||
// println(a) |
|||
// Left(WebWorker.Error) |
|||
// case other => |
|||
// println(other) |
|||
// Left(WebWorker.Error) |
|||
// } |
|||
// } |
|||
// private def parsePrimitive(data: T): Either[WebWorker.Error, T] = { |
|||
// data match { |
|||
// case s: String => decode[T](s).leftMap(_ => WebWorker.Error) |
|||
// case a: Int => |
|||
// println(a) |
|||
// Left(WebWorker.Error) |
|||
// case other => |
|||
// println(other) |
|||
// Left(WebWorker.Error) |
|||
// } |
|||
// } |
|||
// println(s"Got data $a") |
|||
// .map(sub.onNext).left.foreach(println) |
|||
|
|||
val printer = Printer.noSpaces |
|||
|
|||
lazy val source: Task[Observable[T]] = |
|||
Task.deferAction(implicit s => |
|||
for { |
|||
obs <- Task( |
|||
Observable |
|||
.create[T](overflowStrategy) { sub => |
|||
worker.onmessage = (e: MessageEvent) => |
|||
e.data match { |
|||
case s: String => |
|||
decode[T](s).map(sub.onNext).left.foreach(println) |
|||
case other => println(other) |
|||
} |
|||
worker.onerror = (e: Event) => |
|||
sub.onError(new Exception(s"Error in WebSocket: $e")) |
|||
Cancelable(() => worker.terminate()) |
|||
} |
|||
.publish |
|||
.refCount |
|||
) |
|||
_ <- Task(obs.subscribe(Observer.empty)) |
|||
} yield obs |
|||
) |
|||
|
|||
lazy val sink: Task[Observer[T]] = |
|||
Task( |
|||
new Observer[T] { |
|||
override def onNext(elem: T): Future[Ack] = { |
|||
val msg = printer.print(elem.asJson) |
|||
worker.postMessage(msg) |
|||
Future.successful(Ack.Continue) |
|||
} |
|||
override def onError(ex: Throwable): Unit = println(ex) |
|||
override def onComplete(): Unit = () |
|||
} |
|||
) |
|||
|
|||
} |
|||
object WebWorker { |
|||
sealed trait Error |
|||
final case object Error extends Error |
|||
// val w = new sjsdr.Worker("/worker.js").asInstanceOf[Worker] |
|||
|
|||
// type MonixWebWorker[T] = MonixProSubject[T, T] |
|||
|
|||
def apply[T <: Product: Encoder: Decoder]( |
|||
path: String, |
|||
overflowStrategy: OverflowStrategy.Synchronous[T] = |
|||
OverflowStrategy.DropOld(50) |
|||
): Task[WebWorker[T]] = for { |
|||
worker <- Task(new sjsdr.Worker(path)) |
|||
impl = new WebWorkerImpl[T](worker, overflowStrategy) |
|||
source <- impl.source |
|||
sink <- impl.sink |
|||
} yield MonixProSubject.from(sink, source) |
|||
|
|||
} |
|||
|
|||
@JsonCodec |
|||
case class WorkerData(data: Long) |
|||
Write
Preview
Loading…
Cancel
Save
Reference in new issue