NewExponentialBackoff returns a ExponentialBackoff backoff policy.

NewSimpleBackoff creates a SimpleBackoff algorithm with the specified list of fixed intervals in milliseconds.

Retry the function f until it does not return error or BackOff stops.

RetryNotify calls notify function with the error and wait duration for each failed attempt before sleep.

Stop is used as a signal to indicate that no more retries should be made.

ExponentialBackoff implements the simple exponential backoff described by Douglas Thain at http://dthain.blogspot.de/2009/02/exponential-backoff-in-distributed.html.

SimpleBackoff takes a list of fixed values for backoff intervals.

Backoff is an interface for different types of backoff algorithms.

Notify is a notify-on-error function.

An Operation is executing by Retry() or RetryNotify().