Improved error handling

lib/fog/rackspace/load_balancer.rb

@@ -2,6 +2,38 @@ module Fog
   module Rackspace
     class LoadBalancer < Fog::Service
 
+      class ServiceError < Fog::Errors::Error
+        attr_reader :response_data
+
+        def self.slurp(error)
+          #TODO Where is the best place to do this json require
+          require 'json'
+          if error.response.body.empty?
+            data = nil
+            message = nil
+          else
+            data = JSON.parse(error.response.body)
+            message = data['message']
+          end
+
+          new_error = super(error, message)
+          new_error.instance_variable_set(:@response_data, data)
+          new_error
+        end
+      end
+
+      class BadRequest < ServiceError
+        attr_reader :validation_errors
+
+        def self.slurp(error)
+          new_error = super(error)
+          unless new_error.response_data.nil?
+            new_error.instance_variable_set(:@validation_errors, new_error.response_data['validationErrors'])
+          end
+          new_error
+        end
+      end
+
       DFW_ENDPOINT = 'https://dfw.loadbalancers.api.rackspacecloud.com/v1.0/'
       ORD_ENDPOINT = 'https://ord.loadbalancers.api.rackspacecloud.com/v1.0/'
 
@@ -47,13 +79,12 @@ module Fog
               :host     => @host,
               :path     => "#{@path}/#{params[:path]}"
             }))
+          rescue Excon::Errors::NotFound => error
+            raise NotFound.slurp error
+          rescue Excon::Errors::BadRequest => error
+            raise BadRequest.slurp error
           rescue Excon::Errors::HTTPStatusError => error
-            raise case error
+            raise ServiceError.slurp error
-            when Excon::Errors::NotFound
-              Fog::Compute::Rackspace::NotFound.slurp(error)
-            else
-              error
-            end
           end
           unless response.body.empty?
             response.body = JSON.parse(response.body)

lib/fog/rackspace/requests/create_load_balancer.rb

@@ -2,14 +2,14 @@ module Fog
   module Rackspace
     class LoadBalancer
       class Real
-        def create_load_balancer(options = {})
+        def create_load_balancer(name, protocol, port, virtualIps, nodes)
           data = {
             'loadBalancer' => {
-              'name' => options[:name],
+              'name' => name,
-              'port' => options[:port],
+              'port' => port,
-              'protocol' => options[:protocol],
+              'protocol' => protocol,
-              'virtualIps' => options[:virtualIps],
+              'virtualIps' => virtualIps,
-              'nodes' => options[:nodes]
+              'nodes' => nodes
               #Is algorithm allowed on create?
             }
           }

tests/rackspace/requests/load_balancer_tests.rb

@@ -37,17 +37,22 @@ Shindo.tests('Fog::Rackspace::LoadBalancer | load_balancer_tests', ['rackspace']
       'connectionLogging' => { 'enabled' => Fog::Boolean }
   }}
 
+  @lb = Fog::Rackspace::LoadBalancer.new
   tests('success') do
 
     @lb_id = nil
-    @lb = Fog::Rackspace::LoadBalancer.new
+    @lb_name = 'fog' + Time.now.to_i.to_s
 
-    tests('#create_load_balancer()').formats(LOAD_BALANCER_FORMAT) do
+    tests('#create_load_balancer(fog, )').formats(LOAD_BALANCER_FORMAT) do
-      data = @lb.create_load_balancer(:name => 'fog' + Time.now.to_i.to_s, :port => '80', :protocol => 'HTTP', :virtualIps => [{ :type => 'PUBLIC'}], :nodes => [{ :address => '10.0.0.1', :port => 80, :condition => 'ENABLED'}]).body
+      data = @lb.create_load_balancer(@lb_name, 'HTTP', 80, [{ :type => 'PUBLIC'}], [{ :address => '10.0.0.1', :port => 80, :condition => 'ENABLED'}]).body
       @lb_id = data['loadBalancer']['id']
       data
     end
 
+    tests("#update_load_balancer(#{@lb_id}) while immutable").raises(Fog::Rackspace::LoadBalancer::ServiceError) do
+      @lb.update_load_balancer(@lb_id, { :port => 80 }).body
+    end
+
     tests("get_load_balancer(#{@lb_id})").formats(LOAD_BALANCER_FORMAT) do
       @lb.get_load_balancer(@lb_id).body
     end
@@ -75,5 +80,18 @@ Shindo.tests('Fog::Rackspace::LoadBalancer | load_balancer_tests', ['rackspace']
   end
 
   tests('failure') do
+    tests('create_load_balancer(invalid name)').raises(Fog::Rackspace::LoadBalancer::BadRequest) do
+      @lb.create_load_balancer('', 'HTTP', 80, [{ :type => 'PUBLIC'}], [{ :address => '10.0.0.1', :port => 80, :condition => 'ENABLED'}])
+    end
+
+    tests('get_load_balancer(0)').raises(Fog::Rackspace::LoadBalancer::NotFound) do
+      @lb.get_load_balancer(0)
+    end
+    tests('delete_load_balancer(0)').raises(Fog::Rackspace::LoadBalancer::NotFound) do
+      @lb.delete_load_balancer(0)
+    end
+    tests('update_load_balancer(0)').raises(Fog::Rackspace::LoadBalancer::NotFound) do
+      @lb.update_load_balancer(0, { :name => 'newname' })
+    end
   end
 end