Retryable

A gem to quickly make retrying a block accessible when raising an error.

Installation

Add this line to your application's Gemfile:

gem 'retryable', git: 'git@github.com:frankywahl/retryable.git'

And then execute:

$ bundle

Usage

In any class, use just include the module to access the retryable stuff

Here is a complete example

class Foo
  class MyError < StandardError; end
  class MyErrorBis < StandardError; end

  include Retryable
  def my_method
    callback = ->(attempt, exception) do
      puts "Attempt #{attempt} raised #{exception.class} error"
    end
    retryable(tries: 5, on: [MyError, MyErrorBis], sleep: 3, exception_callback: callback) do |attempt, exception|
      raise MyError if attempt < 5
    end
  end
end

Foo.new.my_method

Fun fact: sleep can take an Integer amount of seconds, or can also take a Proc that gets called with the attempt number. This allows for custom algorithm. Example

exponential_backoff = -> (attempt) { 10 ** attempt }
# this will wait for 10, 100, 1_000, ... seconds

Development

Download this repository. Then

bundle install

And start developing.

Tests are at

bundle exec rake

Code Status

Contributing

1. Fork it ( https://github.com/[my-github-username]/retryable/fork )
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create a new Pull Request

Thanks

The code for this was inspired by nfedyashev/retryable and sometimes used as a reference point.