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trait RetrySupport extends AnyRef

This trait provides the retry utility function

Source
RetrySupport.scala
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AnyRef, Any
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RetrySupport
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  1. RetrySupport
  2. AnyRef
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  1. by any2stringadd
  2. by StringFormat
  3. by Ensuring
  4. by ArrowAssoc
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  1. final def !=(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  2. final def ##(): Int
    Definition Classes
    AnyRef → Any
  3. def +(other: String): String
    Implicit
    This member is added by an implicit conversion from RetrySupport to any2stringadd[RetrySupport] performed by method any2stringadd in scala.Predef.
    Definition Classes
    any2stringadd
  4. def ->[B](y: B): (RetrySupport, B)
    Implicit
    This member is added by an implicit conversion from RetrySupport to ArrowAssoc[RetrySupport] performed by method ArrowAssoc in scala.Predef.
    Definition Classes
    ArrowAssoc
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    @inline()
  5. final def ==(arg0: Any): Boolean
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  6. final def asInstanceOf[T0]: T0
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  7. def clone(): AnyRef
    Attributes
    protected[lang]
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    @throws( ... ) @native() @HotSpotIntrinsicCandidate()
  8. def ensuring(cond: (RetrySupport) ⇒ Boolean, msg: ⇒ Any): RetrySupport
    Implicit
    This member is added by an implicit conversion from RetrySupport to Ensuring[RetrySupport] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  9. def ensuring(cond: (RetrySupport) ⇒ Boolean): RetrySupport
    Implicit
    This member is added by an implicit conversion from RetrySupport to Ensuring[RetrySupport] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  10. def ensuring(cond: Boolean, msg: ⇒ Any): RetrySupport
    Implicit
    This member is added by an implicit conversion from RetrySupport to Ensuring[RetrySupport] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  11. def ensuring(cond: Boolean): RetrySupport
    Implicit
    This member is added by an implicit conversion from RetrySupport to Ensuring[RetrySupport] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  12. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  13. def equals(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  14. def formatted(fmtstr: String): String
    Implicit
    This member is added by an implicit conversion from RetrySupport to StringFormat[RetrySupport] performed by method StringFormat in scala.Predef.
    Definition Classes
    StringFormat
    Annotations
    @inline()
  15. final def getClass(): Class[_]
    Definition Classes
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    @native() @HotSpotIntrinsicCandidate()
  16. def hashCode(): Int
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  17. final def isInstanceOf[T0]: Boolean
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  18. final def ne(arg0: AnyRef): Boolean
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  19. final def notify(): Unit
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    @native() @HotSpotIntrinsicCandidate()
  20. final def notifyAll(): Unit
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    @native() @HotSpotIntrinsicCandidate()
  21. def retry[T](attempt: () ⇒ Future[T], attempts: Int, delayFunction: (Int) ⇒ Option[FiniteDuration])(implicit ec: ExecutionContext, scheduler: Scheduler): Future[T]

    Given a function from Unit to Future, returns an internally retrying Future.

    Given a function from Unit to Future, returns an internally retrying Future. The first attempt will be made immediately, each subsequent attempt will be made after the 'delay' return by delayFunction(the input next attempt count start from 1). Returns None for no delay. A scheduler (eg context.system.scheduler) must be provided to delay each retry. You could provide a function to generate the next delay duration after first attempt, this function should never return null, otherwise an IllegalArgumentException will be through.

    If attempts are exhausted the returned future is simply the result of invoking attempt. Note that the attempt function will be invoked on the given execution context for subsequent tries and therefore must be thread safe (not touch unsafe mutable state).

    Example usage:

    //retry with back off

    protected val sendAndReceive: HttpRequest => Future[HttpResponse]
private val sendReceiveRetry: HttpRequest => Future[HttpResponse] = (req: HttpRequest) => retry[HttpResponse](
  attempt = () => sendAndReceive(req),
  attempts = 10,
  delayFunction = attempted => Option(2.seconds * attempted)
)
  22. def retry[T](attempt: () ⇒ Future[T], attempts: Int, delay: FiniteDuration)(implicit ec: ExecutionContext, scheduler: Scheduler): Future[T]

    Given a function from Unit to Future, returns an internally retrying Future.

    Given a function from Unit to Future, returns an internally retrying Future. The first attempt will be made immediately, each subsequent attempt will be made after 'delay'. A scheduler (eg context.system.scheduler) must be provided to delay each retry.

    If attempts are exhausted the returned future is simply the result of invoking attempt. Note that the attempt function will be invoked on the given execution context for subsequent tries and therefore must be thread safe (not touch unsafe mutable state).

    Example usage:

    protected val sendAndReceive: HttpRequest => Future[HttpResponse]
private val sendReceiveRetry: HttpRequest => Future[HttpResponse] = (req: HttpRequest) => retry[HttpResponse](
  attempt = () => sendAndReceive(req),
  attempts = 10,
  delay = 2.seconds
)
  23. def retry[T](attempt: () ⇒ Future[T], attempts: Int, minBackoff: FiniteDuration, maxBackoff: FiniteDuration, randomFactor: Double)(implicit ec: ExecutionContext, scheduler: Scheduler): Future[T]

    Given a function from Unit to Future, returns an internally retrying Future.

    Given a function from Unit to Future, returns an internally retrying Future. The first attempt will be made immediately, each subsequent attempt will be made with a backoff time, if the previous attempt failed.

    If attempts are exhausted the returned future is simply the result of invoking attempt. Note that the attempt function will be invoked on the given execution context for subsequent tries and therefore must be thread safe (not touch unsafe mutable state).

    Example usage:

    protected val sendAndReceive: HttpRequest => Future[HttpResponse]
private val sendReceiveRetry: HttpRequest => Future[HttpResponse] = (req: HttpRequest) => retry[HttpResponse](
  attempt = () => sendAndReceive(req),
  attempts = 10,
  minBackoff = 1.seconds,
  maxBackoff = 2.seconds,
  randomFactor = 0.5
)
    minBackoff

    minimum (initial) duration until the child actor will started again, if it is terminated

    maxBackoff

    the exponential back-off is capped to this duration

    randomFactor

    after calculation of the exponential back-off an additional random delay based on this factor is added, e.g. 0.2 adds up to 20% delay. In order to skip this additional delay pass in 0.

  24. def retry[T](attempt: () ⇒ Future[T], attempts: Int)(implicit ec: ExecutionContext): Future[T]

    Given a function from Unit to Future, returns an internally retrying Future.

    Given a function from Unit to Future, returns an internally retrying Future. The first attempt will be made immediately, each subsequent attempt will be made immediately if the previous attempt failed.

    If attempts are exhausted the returned future is simply the result of invoking attempt. Note that the attempt function will be invoked on the given execution context for subsequent tries and therefore must be thread safe (not touch unsafe mutable state).

    Example usage:

    def possiblyFailing(): Future[Something] = ???
val withRetry: Future[Something] = retry(attempt = possiblyFailing, attempts = 10)
  25. final def synchronized[T0](arg0: ⇒ T0): T0
    Definition Classes
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  26. def toString(): String
    Definition Classes
    AnyRef → Any
  27. final def wait(arg0: Long, arg1: Int): Unit
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    @throws( ... )
  28. final def wait(arg0: Long): Unit
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    @throws( ... ) @native()
  29. final def wait(): Unit
    Definition Classes
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    @throws( ... )
  30. def →[B](y: B): (RetrySupport, B)
    Implicit
    This member is added by an implicit conversion from RetrySupport to ArrowAssoc[RetrySupport] performed by method ArrowAssoc in scala.Predef.
    Definition Classes
    ArrowAssoc

Deprecated Value Members

  1. def finalize(): Unit
    Attributes
    protected[lang]
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    @throws( classOf[java.lang.Throwable] ) @Deprecated
    Deprecated

Inherited from AnyRef

Inherited from Any

Inherited by implicit conversion any2stringadd from RetrySupport to any2stringadd[RetrySupport]

Inherited by implicit conversion StringFormat from RetrySupport to StringFormat[RetrySupport]

Inherited by implicit conversion Ensuring from RetrySupport to Ensuring[RetrySupport]

Inherited by implicit conversion ArrowAssoc from RetrySupport to ArrowAssoc[RetrySupport]

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