Derives a cats.effect.ContextShift from Scheduler for any data type that has a cats.effect.Effect implementation.

import monix.execution.Scheduler
import java.util.concurrent.Executors
import scala.concurrent.ExecutionContext
import cats.effect._

val contextShift: ContextShift[IO] = SchedulerEffect.contextShift[IO](Scheduler.global)
val executor = Executors.newCachedThreadPool()
val ec = ExecutionContext.fromExecutor(executor)

contextShift.evalOn(ec)(IO(println("I'm on different thread pool!")))
  .flatMap { _ =>
    IO(println("I came back to default"))
  }

Derives a cats.effect.Timer from Scheduler for any data type that has a cats.effect.Concurrent type class instance.

import monix.execution.Scheduler
import cats.effect._
import scala.concurrent.duration._

// Needed for ContextShift[IO]
implicit def shift: ContextShift[IO] =
  SchedulerEffect.contextShift[IO](Scheduler.global)(IO.ioEffect)

implicit val timer: Timer[IO] = SchedulerEffect.timer[IO](Scheduler.global)

IO.sleep(10.seconds).flatMap { _ =>
  IO(println("Delayed hello!"))
}

Derives a cats.effect.Timer from Scheduler for any data type that has a cats.effect.LiftIO instance.

This is the relaxed timer method, needing only LiftIO to work, by piggybacking on cats.effect.IO.

import monix.execution.Scheduler
import cats.effect._
import scala.concurrent.duration._

implicit val timer: Timer[IO] = SchedulerEffect.timerLiftIO[IO](Scheduler.global)

IO.sleep(10.seconds).flatMap { _ =>
  IO(println("Delayed hello!"))
}