Retry

A few functions for trying again when things don't go as planned.

Usage

Suppose you had a function, some_func, which might raise SomeError. If the function does raise that error, you'd like to try again. In that case, you could say:

Retry.on_exception(SomeError) do
  some_func
end

(Note that if the function raises a different error, no retry will be attempted.)

If you'd like to retry a couple of times (let's say three), you can do that:

Retry.several_times(SomeError, 3) do
  some_func
end

Sometimes you want to wait a bit before retrying. This example will retry twice, with a four second delay between each attempt:

Retry.with_delay(SomeError, 2, 4) do
  some_func
end

Another common pattern is to wait more and more time between each attempt; this is usually called "exponential backoff". This example will retry 3 times, with a delay of 2, 4, and 8 seconds between each attempt:

Retry.with_exponential_backoff(SomeError, 3, 2) do
  some_func
end

License

The MIT License (MIT)

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.