monix.reactive.internal.operators.DoOnSubscriptionCancelObservable.scala Maven / Gradle / Ivy
/*
* Copyright (c) 2014-2020 by The Monix Project Developers.
* See the project homepage at: https://monix.io
*
* 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 monix.reactive.internal.operators
import monix.eval.Task
import monix.execution.Cancelable
import monix.reactive.Observable
import monix.reactive.observers.Subscriber
private[reactive] final class DoOnSubscriptionCancelObservable[+A](source: Observable[A], task: Task[Unit])
extends Observable[A] {
def unsafeSubscribeFn(subscriber: Subscriber[A]): Cancelable = {
val subscription = source.unsafeSubscribeFn(subscriber)
Cancelable(() => {
// First cancel the source
try subscription.cancel()
finally {
// Then execute the task
task.runAsyncAndForget(subscriber.scheduler)
}
})
}
}