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Added webworker observable class and demo

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This commit is contained in:
Rohan Sircar 2020-12-30 13:51:33 +05:30
parent 979cc88560
commit 537e1abc29
3 changed files with 168 additions and 33 deletions
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18
assets/worker.js Normal file
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@ -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();

122
src/main/scala/outwatchapp/util/reactive/WebWorker.scala Normal file
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@ -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)

61
yarn.lock
View File

@ -28,9 +28,9 @@
integrity sha512-tHq6qdbT9U1IRSGf14CL0pUlULksvY9OZ+5eEgl1N7t+OA3tGvNpxJCzuKQlsNgCVwbAs670L1vcVQi8j9HjnA==
"@types/node@*":
version "14.14.10"
resolved "https://registry.yarnpkg.com/@types/node/-/node-14.14.10.tgz#5958a82e41863cfc71f2307b3748e3491ba03785"
integrity sha512-J32dgx2hw8vXrSbu4ZlVhn1Nm3GbeCFNw2FWL8S5QKucHGY0cyNwjdQdO+KMBZ4wpmC7KhLCiNsdk1RFRIYUQQ==
version "14.14.16"
resolved "https://registry.yarnpkg.com/@types/node/-/node-14.14.16.tgz#3cc351f8d48101deadfed4c9e4f116048d437b4b"
integrity sha512-naXYePhweTi+BMv11TgioE2/FXU4fSl29HAH1ffxVciNsH3rYXjNP2yM8wqmSm7jS20gM8TIklKiTen+1iVncw==
"@webassemblyjs/ast@1.9.0":
version "1.9.0"
@ -1230,9 +1230,9 @@ enhanced-resolve@^4.1.0:
tapable "^1.0.0"
errno@^0.1.3, errno@~0.1.7:
version "0.1.7"
resolved "https://registry.yarnpkg.com/errno/-/errno-0.1.7.tgz#4684d71779ad39af177e3f007996f7c67c852618"
integrity sha512-MfrRBDWzIWifgq6tJj60gkAwtLNb6sQPlcFrSOflcP1aFmmruKQ2wRnze/8V6kgyz7H3FF8Npzv78mZ7XLLflg==
version "0.1.8"
resolved "https://registry.yarnpkg.com/errno/-/errno-0.1.8.tgz#8bb3e9c7d463be4976ff888f76b4809ebc2e811f"
integrity sha512-dJ6oBr5SQ1VSd9qkk7ByRgb/1SH4JZjCHSW/mr63/QcXO9zLVxvJ6Oy13nio03rxpSnVDDjFor75SjVeZWPW/A==
dependencies:
prr "~1.0.1"
@ -1532,9 +1532,9 @@ flush-write-stream@^1.0.0:
readable-stream "^2.3.6"
follow-redirects@^1.0.0:
version "1.13.0"
resolved "https://registry.yarnpkg.com/follow-redirects/-/follow-redirects-1.13.0.tgz#b42e8d93a2a7eea5ed88633676d6597bc8e384db"
integrity sha512-aq6gF1BEKje4a9i9+5jimNFIpq4Q1WiwBToeRK5NvZBd/TRsmW8BsJfOEGkr76TbOyPVD3OVDN910EcUNtRYEA==
version "1.13.1"
resolved "https://registry.yarnpkg.com/follow-redirects/-/follow-redirects-1.13.1.tgz#5f69b813376cee4fd0474a3aba835df04ab763b7"
integrity sha512-SSG5xmZh1mkPGyKzjZP8zLjltIfpW32Y5QpdNJyjcfGxK3qo3NDDkZOZSFiGn1A6SclQxY9GzEwAHQ3dmYRWpg==
for-in@^1.0.2:
version "1.0.2"
@ -1615,9 +1615,9 @@ get-caller-file@^2.0.1:
integrity sha512-DyFP3BM/3YHTQOCUL/w0OZHR0lpKeGrxotcHWcqNEdnltqFwXVfhEBQ94eIo34AfQpo0rGki4cyIiftY06h2Fg==
get-intrinsic@^1.0.0:
version "1.0.1"
resolved "https://registry.yarnpkg.com/get-intrinsic/-/get-intrinsic-1.0.1.tgz#94a9768fcbdd0595a1c9273aacf4c89d075631be"
integrity sha512-ZnWP+AmS1VUaLgTRy47+zKtjTxz+0xMpx3I52i+aalBK1QP19ggLF3Db89KJX7kjfOfP2eoa01qc++GwPgufPg==
version "1.0.2"
resolved "https://registry.yarnpkg.com/get-intrinsic/-/get-intrinsic-1.0.2.tgz#6820da226e50b24894e08859469dc68361545d49"
integrity sha512-aeX0vrFm21ILl3+JpFFRNe9aUvp6VFZb2/CTbgLb8j75kOhvoNYjt9d8KA/tJG4gSo8nzEDedRl0h7vDmBYRVg==
dependencies:
function-bind "^1.1.1"
has "^1.0.3"
@ -1795,9 +1795,9 @@ hpack.js@^2.1.6:
wbuf "^1.1.0"
html-entities@^1.3.1:
version "1.3.1"
resolved "https://registry.yarnpkg.com/html-entities/-/html-entities-1.3.1.tgz#fb9a1a4b5b14c5daba82d3e34c6ae4fe701a0e44"
integrity sha512-rhE/4Z3hIhzHAUKbW8jVcCyuT5oJCXXqhN/6mXXVCpzTmvJnoH2HL/bt3EZ6p55jbFJBeAe1ZNpL5BugLujxNA==
version "1.4.0"
resolved "https://registry.yarnpkg.com/html-entities/-/html-entities-1.4.0.tgz#cfbd1b01d2afaf9adca1b10ae7dffab98c71d2dc"
integrity sha512-8nxjcBcd8wovbeKx7h3wTji4e6+rhaVuPNpMqwWgnHh+N9ToqsCs6XztWRBPQ+UtzsoMAdKZtUENoVzU/EMtZA==
http-deceiver@^1.2.7:
version "1.2.7"
@ -1934,9 +1934,9 @@ inherits@2.0.3:
integrity sha1-Yzwsg+PaQqUC9SRmAiSA9CCCYd4=
ini@^1.3.4:
version "1.3.5"
resolved "https://registry.yarnpkg.com/ini/-/ini-1.3.5.tgz#eee25f56db1c9ec6085e0c22778083f596abf927"
integrity sha512-RZY5huIKCMRWDUqZlEi72f/lmXKMvuszcMBduliQ3nnWbx9X/ZBQO7DijMEYS9EhHBb2qacRUMtC7svLwe0lcw==
version "1.3.8"
resolved "https://registry.yarnpkg.com/ini/-/ini-1.3.8.tgz#a29da425b48806f34767a4efce397269af28432c"
integrity sha512-JV/yugV2uzW5iMRSiZAyDtQd+nxtUnjeLt0acNdw98kKLrvuRVyB80tsREOE7yvGVgalhZ6RNXCmEHkUKBKxew==
internal-ip@^4.3.0:
version "4.3.0"
@ -2455,16 +2455,11 @@ mime@1.6.0:
resolved "https://registry.yarnpkg.com/mime/-/mime-1.6.0.tgz#32cd9e5c64553bd58d19a568af452acff04981b1"
integrity sha512-x0Vn8spI+wuJ1O6S7gnbaQg8Pxh4NNHb7KSINmEWKiPE4RKOplvijn+NkmYmmRgP68mc70j2EbeTFRsrswaQeg==
mime@^2.0.3:
mime@^2.0.3, mime@^2.4.4:
version "2.4.7"
resolved "https://registry.yarnpkg.com/mime/-/mime-2.4.7.tgz#962aed9be0ed19c91fd7dc2ece5d7f4e89a90d74"
integrity sha512-dhNd1uA2u397uQk3Nv5LM4lm93WYDUXFn3Fu291FJerns4jyTudqhIWe4W04YLy7Uk1tm1Ore04NpjRvQp/NPA==
mime@^2.4.4:
version "2.4.6"
resolved "https://registry.yarnpkg.com/mime/-/mime-2.4.6.tgz#e5b407c90db442f2beb5b162373d07b69affa4d1"
integrity sha512-RZKhC3EmpBchfTGBVb8fb+RL2cWyw/32lshnsETttkBAyAUXSGHxbEJWWRXc751DrIxG1q04b8QwMbAwkRPpUA==
mimic-fn@^2.0.0:
version "2.1.0"
resolved "https://registry.yarnpkg.com/mimic-fn/-/mimic-fn-2.1.0.tgz#7ed2c2ccccaf84d3ffcb7a69b57711fc2083401b"
@ -2550,11 +2545,16 @@ ms@2.1.1:
resolved "https://registry.yarnpkg.com/ms/-/ms-2.1.1.tgz#30a5864eb3ebb0a66f2ebe6d727af06a09d86e0a"
integrity sha512-tgp+dl5cGk28utYktBsrFqA7HKgrhgPsg6Z/EfhWI4gl1Hwq8B/GmY/0oXZ6nF8hDVesS/FpnYaD/kOWhYQvyg==
ms@2.1.2, ms@^2.1.1:
ms@2.1.2:
version "2.1.2"
resolved "https://registry.yarnpkg.com/ms/-/ms-2.1.2.tgz#d09d1f357b443f493382a8eb3ccd183872ae6009"
integrity sha512-sGkPx+VjMtmA6MX27oA4FBFELFCZZ4S4XqeGOXCv68tT+jb3vk/RyaKWP0PTKyWtmLSM0b+adUTEvbs1PEaH2w==
ms@^2.1.1:
version "2.1.3"
resolved "https://registry.yarnpkg.com/ms/-/ms-2.1.3.tgz#574c8138ce1d2b5861f0b44579dbadd60c6615b2"
integrity sha512-6FlzubTLZG3J2a/NVCAleEhjzq5oxgHyaCU9yYXvcLsvoVaHJq/s5xXI6/XXP6tz7R9xAOtHnSO/tXtF3WRTlA==
multicast-dns-service-types@^1.1.0:
version "1.1.0"
resolved "https://registry.yarnpkg.com/multicast-dns-service-types/-/multicast-dns-service-types-1.1.0.tgz#899f11d9686e5e05cb91b35d5f0e63b773cfc901"
@ -3870,11 +3870,6 @@ typedarray@^0.0.6:
resolved "https://registry.yarnpkg.com/typedarray/-/typedarray-0.0.6.tgz#867ac74e3864187b1d3d47d996a78ec5c8830777"
integrity sha1-hnrHTjhkGHsdPUfZlqeOxciDB3c=
typescript@4:
version "4.1.3"
resolved "https://registry.yarnpkg.com/typescript/-/typescript-4.1.3.tgz#519d582bd94cba0cf8934c7d8e8467e473f53bb7"
integrity sha512-B3ZIOf1IKeH2ixgHhj6la6xdwR9QrLC5d1VKeCSY4tvkqhF2eqd9O7txNlS0PO3GrBAFIdr3L1ndNwteUbZLYg==
union-value@^1.0.0:
version "1.0.1"
resolved "https://registry.yarnpkg.com/union-value/-/union-value-1.0.1.tgz#0b6fe7b835aecda61c6ea4d4f02c14221e109847"
@ -4051,9 +4046,9 @@ webpack-cli@3.3.2:
yargs "^12.0.5"
webpack-dev-middleware@^3.7.2:
version "3.7.2"
resolved "https://registry.yarnpkg.com/webpack-dev-middleware/-/webpack-dev-middleware-3.7.2.tgz#0019c3db716e3fa5cecbf64f2ab88a74bab331f3"
integrity sha512-1xC42LxbYoqLNAhV6YzTYacicgMZQTqRd27Sim9wn5hJrX3I5nxYy1SxSd4+gjUFsz1dQFj+yEe6zEVmSkeJjw==
version "3.7.3"
resolved "https://registry.yarnpkg.com/webpack-dev-middleware/-/webpack-dev-middleware-3.7.3.tgz#0639372b143262e2b84ab95d3b91a7597061c2c5"
integrity sha512-djelc/zGiz9nZj/U7PTBi2ViorGJXEWo/3ltkPbDyxCXhhEXkW0ce99falaok4TPj+AsxLiXJR0EBOb0zh9fKQ==
dependencies:
memory-fs "^0.4.1"
mime "^2.4.4"