Add cortex exceptions, throw Cortex-specific exception failed

Author: Casao

cortex-client.gemspec

@@ -20,4 +20,5 @@ Gem::Specification.new do |s|
   s.add_dependency 'faraday', '~> 0.9'
   s.add_dependency 'faraday_middleware', '~> 0.9.0'
   s.add_dependency 'oauth2', '~>0.9'
+  s.add_dependency 'cortex-exceptions', '~> 0.0.3'
 end

lib/cortex/client.rb

@@ -30,8 +30,12 @@ def initialize(hasharg)
     end
 
     def get_cc_token
-      client = OAuth2::Client.new(@key, @secret, site: @base_url)
-      client.client_credentials.get_token
+      begin
+        client = OAuth2::Client.new(@key, @secret, site: @base_url)
+        client.client_credentials.get_token
+      rescue Faraday::ConnectionFailed => e
+        raise Cortex::Exceptions::ConnectionFailed(base_url: @base_url)
+      end
     end
   end
 end