Allow job classes to define retryable exceptions

[myronmarston]

Currently, the ruby worker fails all exceptions. However, there are certain types of errors (e.g. transient network failures) that we expect, and that we'd like it to automatically retry. Here's a suggested API for that:

class MyJob
  extend Qless::RetryExceptions(TimeoutError, SomeOtherError)

  def self.perform(data)
  end
end

[proby]

+1

[bkirz]

As per our earlier conversation, the method disguised as a class name is a bit misleading. I'll go with the following API:

class MyJob
  extend Qless:RetryExceptions
  retry_on TimeoutError, SomeOtherError

  def self.perform(job)
    #...
  end
end

[bkirz]

Closed by #63