Given a function, returns an internally retrying Task. 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 Task is simply the result of invoking attempt.

Declaration

public static Task<T> Retry<T>(Func<Task<T>> attempt, int attempts)

Parameters

Type	Name	Description
Func<Task<T>>	attempt	A function that produces the Task<TResult> to execute on each try.
int	attempts	Maximum number of attempts to make before giving up.

Returns

Type	Description
Task<T>

Type Parameters

Name	Description
T

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Retry<T>(Func<Task<T>>, int, Func<int, Option<TimeSpan>>, IScheduler)

Given a function, returns an internally retrying Task. 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 InvalidOperationException will be through.

If attempts are exhausted the returned Task is simply the result of invoking attempt.

Declaration

public static Task<T> Retry<T>(Func<Task<T>> attempt, int attempts, Func<int, Option<TimeSpan>> delayFunction, IScheduler scheduler)

Parameters

Type	Name	Description
Func<Task<T>>	attempt	A function that produces the Task<TResult> to execute on each try.
int	attempts	Maximum number of attempts to make before giving up.
Func<int, Option<TimeSpan>>	delayFunction	A function that receives the next attempt number (starting from 1) and returns an Option<T> delay before that attempt. Return None for no delay.
IScheduler	scheduler	The scheduler instance to use.

Returns

Type	Description
Task<T>

Type Parameters

Name	Description
T

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Retry<T>(Func<Task<T>>, int, TimeSpan, IScheduler)

Given a function, returns an internally retrying Task. 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.

Declaration

public static Task<T> Retry<T>(Func<Task<T>> attempt, int attempts, TimeSpan delay, IScheduler scheduler)

Parameters

Type	Name	Description
Func<Task<T>>	attempt	A function that produces the Task<TResult> to execute on each try.
int	attempts	Maximum number of attempts to make before giving up.
TimeSpan	delay	The fixed duration to wait between retry attempts.
IScheduler	scheduler	The scheduler instance to use.

Returns

Type	Description
Task<T>

Type Parameters

Name	Description
T

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Retry<T>(Func<Task<T>>, int, TimeSpan, TimeSpan, double, IScheduler)

Given a function, returns an internally retrying Task. 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 Task is simply the result of invoking attempt.

Declaration

public static Task<T> Retry<T>(Func<Task<T>> attempt, int attempts, TimeSpan minBackoff, TimeSpan maxBackoff, double randomFactor, IScheduler scheduler)

Parameters

Type	Name	Description
Func<Task<T>>	attempt	A function that produces the Task<TResult> to execute on each try.
int	attempts	Maximum number of attempts to make before giving up.
TimeSpan	minBackoff	minimum (initial) duration until the child actor will started again, if it is terminated.
TimeSpan	maxBackoff	the exponential back-off is capped to this duration.
double	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`.
IScheduler	scheduler	The scheduler instance to use.

Returns

Type	Description
Task<T>

Type Parameters

Name	Description
T