zio.Scheduler.scala Maven / Gradle / Ivy
/*
* Copyright 2017-2024 John A. De Goes and the ZIO Contributors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package zio
import zio.Scheduler.CancelToken
import zio.stacktracer.TracingImplicits.disableAutoTrace
import java.util.concurrent.{ScheduledExecutorService, TimeUnit}
abstract class Scheduler {
def asScheduledExecutorService: ScheduledExecutorService
def schedule(task: Runnable, duration: Duration)(implicit unsafe: Unsafe): CancelToken
}
object Scheduler {
type CancelToken = () => Boolean
def fromScheduledExecutorService(service: ScheduledExecutorService): Scheduler =
new Scheduler {
val ConstFalse = () => false
def asScheduledExecutorService: ScheduledExecutorService =
service
def schedule(task: Runnable, duration: Duration)(implicit unsafe: Unsafe): CancelToken =
(duration: @unchecked) match {
case Duration.Infinity => ConstFalse
case d if d.isZero || d.isNegative =>
task.run()
ConstFalse
case d =>
val future = service.schedule(
task,
d.toNanos,
TimeUnit.NANOSECONDS
)
() => future.cancel(true)
}
}
}