base.rb

module Etl
  module CasUrl
    
    class UnsuccessfulResponseError < ::StandardError; end
    
    class Base
      
      private_class_method :new
      
      private
        
      attr_reader :applicant_id, :cas_id, :response
        
      def initialize(applicant_id, cas_id)
        @applicant_id = applicant_id
        @cas_id = cas_id
      end
       
      def response_dump
        [response.body, response.code, response.message, response.headers.inspect].join("\n")
      end
      
      def request_etl
        @response = self.class.post("#{applicant_id}/#{cas_id}")
        
        raise UnsuccessfulResponseError, response_dump unless success?
      end
      
      def success?
        response.body == 'SUCCESS'
      end
    end
  end
end

environment_example.rb

Etl.configure do |c|
  old_url = CasUrl::Factory.build(ENV.fetch('CAS3_0_ONE_BUTTON', 'default_url'))
  new_url = CasUrl::Factory.build(ENV.fetch('CAS3_1_ONE_BUTTON', 'default_url'))
  
  c.cas_url = {
    1121: old_url,
    1116: old_url,
    1122: old_url,
    1117: old_url,
    1: old_url,
    default: new_url
  }
end

factory.rb

module Etl
  module CasUrl
    class Factory
    
    private_class_method :new
    
    def self.build(base_url)
      Class.new(CasUrl::Base) do
        include HTTParty        
        base_uri("#{base_url}/generateXMLAndPushToMQL2")
        
        define_singleton_method :request_etl! do |applicant_id:, cas_id:|
          new(applicant_id, cas_id).send(:request_etl)
        end
      end
    end
  end
end

requeue_applicant_job.rb

module Etl
  class RequeueApplicantJob
    include Resque::Plugins::Status
    
    def self.perform
      at(1,2,'Requesting from CAS Server')
      cas_url_for(cas_id).request_etl!(applicant_id: applicant_id, cas_id: cas_id)
      at(2,2, 'Applicant is back on the queue.')
    end
    
    private
    
    def applicant_id
      options.fetch('applicant_id')
    end
    
    def cas_id
      options.fetch('cas_id')
    end
    
    def cas_url_for(cas_id)
      Etl.configuration.cas_url[cas_id.to_sym] || Etl.configuration.cas_url.fetch(:default)
    end
  end
end

So you just need to do:

# In config/environment.rb
Etl.configure do |c|
  old_url = CasUrl::Factory.build(ENV.fetch('CAS3_0_ONE_BUTTON', 'default_url'))
  new_url = CasUrl::Factory.build(ENV.fetch('CAS3_1_ONE_BUTTON', 'default_url'))
  
  c.cas_url = {
    1121: old_url,
    1116: old_url,
    1122: old_url,
    1117: old_url,
    1: old_url,
    default: new_url
  }
end
# In the Job instead of sleep (May need to add logic for gpa request, as in what to do with that :/)
RequeueApplicantJob.create(applicant_id: ..., cas_id: ...)