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Retry conditions

Source: R/retry_retry.R
retry_conditions.Rd

Decide whether retry() tries again after an attempt.

Usage

retry_all()

retry_never()

retry_if_error(classes = "error")

retry_if_error_message(message = NULL, match = NULL)

retry_if_result(predicate = function() NULL)

Arguments

classes

Condition classes to retry on.

message

Error message to match exactly.

match

Regular expression to match against the error message.

predicate

Function taking the returned value and returning TRUE to retry.

Value

A retry condition to pass to retry().

Details

  • retry_all() retries on any error.

  • retry_never() never retries, so the first error is re-thrown.

  • retry_if_error() retries on errors inheriting from any of classes.

  • retry_if_error_message() retries when the error message equals message, or matches the regular expression match. Supply exactly one.

  • retry_if_result() retries when the call succeeds but predicate(value) is TRUE.

Examples

retry_if_error("http_error")
#> <garnish::retry_if_error>
#>  @ classes: chr "http_error"
retry_if_error_message(match = "timed? ?out")
#> <garnish::retry_if_error_message>
#>  @ message: NULL
#>  @ match  : chr "timed? ?out"
retry_if_result(is.null)
#> <garnish::retry_if_result>
#>  @ predicate: function (x)