From: "Jesús Gabriel y Galán" <jgabrielygalan@...>
Date: 2013-01-25T02:29:04+09:00
Subject: Re: How to DRY this up?

On Thu, Jan 24, 2013 at 6:18 PM, tamouse mailing lists
<tamouse.lists@gmail.com> wrote:
> I have some API calls I'm making, all with the following sort of
> begin-rescue-end wrapper:
>
> (pseudo-code)
>
> retries = 0
> begin
>   response = SomeAPI.api_method1(:request => { 'ThisId' => this_id })
> rescue API::Exception => e
>   retries.succ
>   sleep( retries * 5 )
>   retry unless retries > 2
> end
>
> where there are multiple api_methods and request forms. Seems like I
> should be able to DRY this instead of doing this everywhere I have to
> make this sort of API call.

You could create a method for it (untested):

def call_with_retries obj, method, *args, retries=2
  begin
    response = obj.send(method, *args)
  rescue API::Exception => e
    retries -= 1
    sleep( retries * 5 )
    retry unless retries < 0
  end
end

and call it like

call_with_retries SomeApi, :api_method1, :request => { 'ThisId' => this_id }

You could also pass the exception to rescue, or just rescue
StandardError, and also pass the time to sleep.
Hope this gives you some ideas.

Jesus.