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• InMemoryEventStream.scala

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com.ing.baker.runtime.inmemory.InMemoryEventStream.scala Maven / Gradle / Ivy

package com.ing.baker.runtime.inmemory

import cats.effect.IO
import cats.effect.concurrent.Ref
import com.ing.baker.runtime.model.EventStream
import com.ing.baker.runtime.scaladsl.BakerEvent
import com.typesafe.scalalogging.LazyLogging

object InMemoryEventStream {

  def build: IO[InMemoryEventStream] =
    Ref.of[IO, List[BakerEvent => Unit]](List.empty).map(new InMemoryEventStream(_))
}

class InMemoryEventStream(store: Ref[IO, List[BakerEvent => Unit]]) extends EventStream[IO] with LazyLogging {

  override def fetchListeners: IO[List[BakerEvent => Unit]] =
    store.get

  override def subscribe(listenerFunction: BakerEvent => Unit): IO[Unit] =
    store.update(listenerFunction :: _)
}