use a follower for one of the repos endpoint

Gemfile

@@ -23,6 +23,8 @@ gem 'dalli'
 gem 'pry'
 gem 'metriks',        '0.9.9.2'
 
+gem 'ar-octopus', github: 'tchandy/octopus', require: 'octopus'
+
 group :test do
   gem 'rspec',        '~> 2.11'
   gem 'factory_girl', '~> 2.4.0'

Gemfile.lock

@@ -43,6 +43,14 @@ GIT
       activesupport
       hashr (~> 0.0.10)
 
+GIT
+  remote: git://github.com/tchandy/octopus.git
+  revision: 8df2768bf37e75e6cc30816eeb9440748a2a3ae9
+  specs:
+    ar-octopus (0.5.0beta)
+      activerecord (>= 2.3.0)
+      activesupport (>= 2.3.0)
+
 GIT
   remote: git://github.com/travis-ci/travis-core.git
   revision: 75986691f25bd5533fa812dbe81638c7d1da3651
@@ -274,6 +282,7 @@ PLATFORMS
   ruby
 
 DEPENDENCIES
+  ar-octopus!
   bunny
   dalli
   database_cleaner (~> 0.8.0)

lib/travis/api/app.rb

@@ -118,6 +118,12 @@ module Travis::Api
       def self.setup_travis
         Travis::Amqp.config = Travis.config.amqp
         Travis::Database.connect
+
+        Octopus.setup do |config|
+          config.shards = { :follower => Travis.config.database_follower }
+          config.environments = [:production]
+        end
+
         Travis::Features.start
 
         if Travis.env == 'production' || Travis.env == 'staging'

lib/travis/api/app/endpoint/repos.rb

@@ -52,7 +52,9 @@ class Travis::Api::App
       #
       # json(:repository)
       get '/:owner_name/:name' do
-        respond_with service(:find_repo, params)
+        Octopus.using(:follower) do
+          respond_with service(:find_repo, params)
+        end
       end
 
       # Gets the builds for the repository with the given name.