trait Fiber[A] extends cats.effect.Fiber[Task, A]
Fiber represents the (pure) result of a Task being started concurrently
and that can be either joined or cancelled.
You can think of fibers as being lightweight threads, a fiber being a concurrency primitive for doing cooperative multi-tasking.
For example a Fiber value is the result of evaluating Task.start:
val task = Task.evalAsync(println("Hello!")) val forked: Task[Fiber[Unit]] = task.start
Usage example:
val launchMissiles = Task(println("Missiles launched!")) val runToBunker = Task(println("Run Lola run!")) for { fiber <- launchMissiles.start _ <- runToBunker.onErrorHandleWith { error => // Retreat failed, cancel launch (maybe we should // have retreated to our bunker before the launch?) fiber.cancel.flatMap(_ => Task.raiseError(error)) } aftermath <- fiber.join } yield { aftermath }
- Source
- Fiber.scala
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- abstract def cancel: CancelToken[Task]
Triggers the cancellation of the fiber.
Triggers the cancellation of the fiber.
Returns a new task that will complete when the cancellation is sent (but not when it is observed or acted upon).
Note that if the background process that's evaluating the result of the underlying fiber is already complete, then there's nothing to cancel.
- Definition Classes
- Fiber → Fiber
- abstract def join: Task[A]
Returns a new task that will await for the completion of the underlying fiber, (asynchronously) blocking the current run-loop until that result is available.
Returns a new task that will await for the completion of the underlying fiber, (asynchronously) blocking the current run-loop until that result is available.
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This is the API documentation for the Monix library.
Package Overview
monix.execution exposes lower level primitives for dealing with asynchronous execution:
Atomictypes, as alternative tojava.util.concurrent.atomicmonix.catnap exposes pure abstractions built on top of the Cats-Effect type classes:
monix.eval is for dealing with evaluation of results, thus exposing Task and Coeval.
monix.reactive exposes the
Observablepattern:Observableimplementationsmonix.tail exposes Iterant for purely functional pull based streaming:
BatchandBatchCursor, the alternatives to Scala'sIterableandIteratorrespectively that we are using within Iterant's encodingYou can control evaluation with type you choose - be it Task, Coeval, cats.effect.IO or your own as long as you provide correct cats-effect or cats typeclass instance.