Add Airbrake support

Gemfile

@@ -3,6 +3,7 @@ source "http://rubygems.org"
 gem "sinatra"
 gem "sinatra-contrib"
 gem "riak-client"
+gem "airbrake"
 
 group :test do
   gem 'rake'

Gemfile.lock

@@ -1,6 +1,12 @@
 GEM
   remote: http://rubygems.org/
   specs:
+    activesupport (3.2.2)
+      i18n (~> 0.6)
+      multi_json (~> 1.0)
+    airbrake (3.0.9)
+      activesupport
+      builder
     backports (2.3.0)
     beefcake (0.3.7)
     builder (3.0.0)
@@ -38,6 +44,7 @@ PLATFORMS
   ruby
 
 DEPENDENCIES
+  airbrake
   purdytest
   rake
   riak-client

liquor-cabinet.gemspec

@@ -19,6 +19,7 @@ Gem::Specification.new do |s|
   s.add_dependency('sinatra')
   s.add_dependency('sinatra-contrib')
   s.add_dependency('riak-client')
+  s.add_dependency('airbrake')
 
   s.files        = Dir.glob("{bin,lib}/**/*") + Dir['*.rb']
   # s.executables  = ['config.ru']

liquor-cabinet.rb

@@ -11,12 +11,13 @@ class LiquorCabinet < Sinatra::Base
 
   def self.config=(config)
     @config = config
+    configure_airbrake
   end
 
   def self.config
     return @config if @config
     config = File.read(File.expand_path('config.yml', File.dirname(__FILE__)))
-    @config = YAML.load(config)[ENV['RACK_ENV']]
+    self.config = YAML.load(config)[ENV['RACK_ENV']]
   end
 
   configure :development do
@@ -44,6 +45,10 @@ class LiquorCabinet < Sinatra::Base
     "Ohai."
   end
 
+  get "/airbrake" do
+    raise "Ohai, exception from Sinatra app"
+  end
+
   get "/:user/:category/:key" do
     get_data(@user, @category, @key)
   end
@@ -61,4 +66,19 @@ class LiquorCabinet < Sinatra::Base
     halt 200
   end
 
+  private
+
+  def self.configure_airbrake
+    if @config['airbrake'] && @config['airbrake']['api_key']
+      require "airbrake"
+
+      Airbrake.configure do |airbrake|
+        airbrake.api_key = @config['airbrake']['api_key']
+      end
+
+      use Airbrake::Rack
+      enable :raise_errors
+    end
+  end
+
 end