Class/Object

monix.eval.Coeval

Once

Related Docs: object Once | package Coeval

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final class Once[+A] extends Coeval[A] with () ⇒ A

Constructs a lazy Coeval instance that gets evaluated only once.

In some sense it is equivalent to using a lazy val. When caching is not required or desired, prefer Always or Now.

Source
Coeval.scala
Linear Supertypes
() ⇒ A, Coeval[A], Serializable, Serializable, AnyRef, Any
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Inherited
  1. Once
  2. Function0
  3. Coeval
  4. Serializable
  5. Serializable
  6. AnyRef
  7. Any
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Visibility
  1. Public
  2. All

Instance Constructors

  1. new Once(f: () ⇒ A)

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Value Members

  1. final def !=(arg0: Any): Boolean

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    Definition Classes
    AnyRef → Any
  2. final def ##(): Int

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    Definition Classes
    AnyRef → Any
  3. final def ==(arg0: Any): Boolean

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    Definition Classes
    AnyRef → Any
  4. def apply(): A

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    Definition Classes
    Once → Function0
  5. final def asInstanceOf[T0]: T0

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    Definition Classes
    Any
  6. def clone(): AnyRef

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    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  7. def dematerialize[B](implicit ev: <:<[A, Try[B]]): Coeval[B]

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    Dematerializes the source's result from a Try.

    Dematerializes the source's result from a Try.

    Definition Classes
    Coeval
  8. def dematerializeAttempt[B](implicit ev: <:<[A, Attempt[B]]): Coeval[B]

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    Dematerializes the source's result from an Attempt.

    Dematerializes the source's result from an Attempt.

    Definition Classes
    Coeval
  9. def doOnFinish(f: (Option[Throwable]) ⇒ Coeval[Unit]): Coeval[A]

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    Returns a new Coeval in which f is scheduled to be run on completion.

    Returns a new Coeval in which f is scheduled to be run on completion. This would typically be used to release any resources acquired by this Coeval.

    Definition Classes
    Coeval
  10. final def eq(arg0: AnyRef): Boolean

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    Definition Classes
    AnyRef
  11. def equals(arg0: Any): Boolean

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    Definition Classes
    AnyRef → Any
  12. def failed: Coeval[Throwable]

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    Returns a failed projection of this coeval.

    Returns a failed projection of this coeval.

    The failed projection is a future holding a value of type Throwable, emitting a value which is the throwable of the original coeval in case the original coeval fails, otherwise if the source succeeds, then it fails with a NoSuchElementException.

    Definition Classes
    Coeval
  13. def finalize(): Unit

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    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )
  14. def flatMap[B](f: (A) ⇒ Coeval[B]): Coeval[B]

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    Creates a new Coeval by applying a function to the successful result of the source, and returns a new instance equivalent to the result of the function.

    Creates a new Coeval by applying a function to the successful result of the source, and returns a new instance equivalent to the result of the function.

    Definition Classes
    Coeval
  15. def flatten[B](implicit ev: <:<[A, Coeval[B]]): Coeval[B]

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    Given a source Coeval that emits another Coeval, this function flattens the result, returning a Coeval equivalent to the emitted Coeval by the source.

    Given a source Coeval that emits another Coeval, this function flattens the result, returning a Coeval equivalent to the emitted Coeval by the source.

    Definition Classes
    Coeval
  16. final def getClass(): Class[_]

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    Definition Classes
    AnyRef → Any
  17. def hashCode(): Int

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    Definition Classes
    AnyRef → Any
  18. final def isInstanceOf[T0]: Boolean

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    Definition Classes
    Any
  19. def map[B](f: (A) ⇒ B): Coeval[B]

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    Returns a new Coeval that applies the mapping function to the element emitted by the source.

    Returns a new Coeval that applies the mapping function to the element emitted by the source.

    Definition Classes
    Coeval
  20. def materialize: Coeval[Try[A]]

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    Creates a new Coeval that will expose any triggered error from the source.

    Creates a new Coeval that will expose any triggered error from the source.

    Definition Classes
    Coeval
  21. def materializeAttempt: Coeval[Attempt[A]]

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    Creates a new Coeval that will expose any triggered error from the source.

    Creates a new Coeval that will expose any triggered error from the source.

    Definition Classes
    Coeval
  22. def memoize: Coeval[A]

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    Memoizes the result on the computation and reuses it on subsequent invocations of runAsync.

    Memoizes the result on the computation and reuses it on subsequent invocations of runAsync.

    Definition Classes
    Coeval
  23. final def ne(arg0: AnyRef): Boolean

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    Definition Classes
    AnyRef
  24. final def notify(): Unit

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    Definition Classes
    AnyRef
  25. final def notifyAll(): Unit

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    Definition Classes
    AnyRef
  26. def onErrorFallbackTo[B >: A](that: Coeval[B]): Coeval[B]

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    Creates a new coeval that in case of error will fallback to the given backup coeval.

    Creates a new coeval that in case of error will fallback to the given backup coeval.

    Definition Classes
    Coeval
  27. def onErrorHandle[U >: A](f: (Throwable) ⇒ U): Coeval[U]

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    Creates a new coeval that will handle any matching throwable that this coeval might emit.

    Creates a new coeval that will handle any matching throwable that this coeval might emit.

    See onErrorRecover for the version that takes a partial function.

    Definition Classes
    Coeval
  28. def onErrorHandleWith[B >: A](f: (Throwable) ⇒ Coeval[B]): Coeval[B]

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    Creates a new coeval that will handle any matching throwable that this coeval might emit by executing another coeval.

    Creates a new coeval that will handle any matching throwable that this coeval might emit by executing another coeval.

    See onErrorRecoverWith for the version that takes a partial function.

    Definition Classes
    Coeval
  29. def onErrorRecover[U >: A](pf: PartialFunction[Throwable, U]): Coeval[U]

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    Creates a new coeval that on error will try to map the error to another value using the provided partial function.

    Creates a new coeval that on error will try to map the error to another value using the provided partial function.

    See onErrorHandle for the version that takes a total function.

    Definition Classes
    Coeval
  30. def onErrorRecoverWith[B >: A](pf: PartialFunction[Throwable, Coeval[B]]): Coeval[B]

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    Creates a new coeval that will try recovering from an error by matching it with another coeval using the given partial function.

    Creates a new coeval that will try recovering from an error by matching it with another coeval using the given partial function.

    See onErrorHandleWith for the version that takes a total function.

    Definition Classes
    Coeval
  31. def onErrorRestart(maxRetries: Long): Coeval[A]

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    Creates a new coeval that in case of error will retry executing the source again and again, until it succeeds.

    Creates a new coeval that in case of error will retry executing the source again and again, until it succeeds.

    In case of continuous failure the total number of executions will be maxRetries + 1.

    Definition Classes
    Coeval
  32. def onErrorRestartIf(p: (Throwable) ⇒ Boolean): Coeval[A]

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    Creates a new coeval that in case of error will retry executing the source again and again, until it succeeds.

    Creates a new coeval that in case of error will retry executing the source again and again, until it succeeds.

    In case of continuous failure the total number of executions will be maxRetries + 1.

    Definition Classes
    Coeval
  33. def restartUntil(p: (A) ⇒ Boolean): Coeval[A]

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    Given a predicate function, keep retrying the coeval until the function returns true.

    Given a predicate function, keep retrying the coeval until the function returns true.

    Definition Classes
    Coeval
  34. lazy val runAttempt: Attempt[A]

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    Evaluates the underlying computation and returns the result or any triggered errors as a Coeval.Attempt.

    Evaluates the underlying computation and returns the result or any triggered errors as a Coeval.Attempt.

    Definition Classes
    OnceCoeval
  35. def runTry: Try[A]

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    Evaluates the underlying computation and returns the result or any triggered errors as a scala.util.Try.

    Evaluates the underlying computation and returns the result or any triggered errors as a scala.util.Try.

    Definition Classes
    Coeval
  36. final def synchronized[T0](arg0: ⇒ T0): T0

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    Definition Classes
    AnyRef
  37. def task: Task[A]

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    Converts the source Coeval into a Task.

    Converts the source Coeval into a Task.

    Definition Classes
    Coeval
  38. def toString(): String

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    Definition Classes
    Once → Function0 → AnyRef → Any
  39. def value: A

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    Evaluates the underlying computation and returns the result.

    Evaluates the underlying computation and returns the result.

    NOTE: this can throw exceptions.

    Definition Classes
    Coeval
  40. final def wait(): Unit

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    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  41. final def wait(arg0: Long, arg1: Int): Unit

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    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  42. final def wait(arg0: Long): Unit

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    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  43. def zip[B](that: Coeval[B]): Coeval[(A, B)]

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    Zips the values of this and that coeval, and creates a new coeval that will emit the tuple of their results.

    Zips the values of this and that coeval, and creates a new coeval that will emit the tuple of their results.

    Definition Classes
    Coeval
  44. def zipMap[B, C](that: Coeval[B])(f: (A, B) ⇒ C): Coeval[C]

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    Zips the values of this and that and applies the given mapping function on their results.

    Zips the values of this and that and applies the given mapping function on their results.

    Definition Classes
    Coeval

Deprecated Value Members

  1. def zipWith[B, C](that: Coeval[B])(f: (A, B) ⇒ C): Coeval[C]

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    Definition Classes
    Coeval
    Annotations
    @deprecated
    Deprecated

    (Since version 2.0-RC12) Renamed, please use Coeval.zipMap

Inherited from () ⇒ A

Inherited from Coeval[A]

Inherited from Serializable

Inherited from Serializable

Inherited from AnyRef

Inherited from Any

Ungrouped