Retry code execution with exponential backoff

This function attempts to execute code multiple times with random delays between attempts. It's particularly useful for handling transient failures in operations that may succeed on subsequent attempts, such as network requests or file operations.

try_again(
  x,
  times = 2,
  delay_seconds_min = 5,
  delay_seconds_max = 10,
  verbose = FALSE
)

Arguments

x

The code to execute (as an expression)

times

Integer, the maximum number of attempts to make. Defaults to 2

delay_seconds_min

Numeric, the minimum delay in seconds between attempts. Defaults to 5

delay_seconds_max

Numeric, the maximum delay in seconds between attempts. Defaults to 10

verbose

Logical, whether to show progress information. Defaults to FALSE

Value

TRUE invisibly if successful, otherwise throws an error with the last error message

Details

The function is adapted from the try_again function in the testthat package, but with additional features for controlling retry behavior and verbosity.

Examples

if (FALSE) { # \dontrun{
# Try a simple operation
try_again({
  # Your code here
  stop("Simulated error")
}, times = 3, verbose = TRUE)

# Try with custom delays
try_again({
  # Your code here
  stop("Simulated error")
}, delay_seconds_min = 1, delay_seconds_max = 3)
} # }