cache item show pages as a first try :)

Gemfile

@@ -39,6 +39,8 @@ group :development_async, :production do
   gem 'em-http-request',:git => 'git://github.com/igrigorik/em-http-request.git', :require => 'em-http'
   
   gem 'thin', '~> 1.2.7'
+  
+  gem 'memcache-client', '~> 1.8.5', :require => ['memcache', 'memcache/event_machine']
 end
 
 group :test do

Gemfile.lock

@@ -91,6 +91,7 @@ GEM
       i18n (>= 0.4.1)
       mime-types (~> 1.16)
       treetop (~> 1.4.8)
+    memcache-client (1.8.5)
     mime-types (1.16)
     msgpack (0.4.3)
     openneo-auth-signatory (0.1.0)
@@ -163,6 +164,7 @@ DEPENDENCIES
   haml (~> 3.0.18)
   hoptoad_notifier
   jammit (~> 0.5.3)
+  memcache-client (~> 1.8.5)
   msgpack (~> 0.4.3)
   mysqlplus!
   openneo-auth-signatory (~> 0.1.0)

app/controllers/items_controller.rb

@@ -1,5 +1,6 @@
 class ItemsController < ApplicationController
   before_filter :set_query
+  caches_action :show, :layout => false
   
   def index
     if params.has_key?(:q)

app/controllers/sweeper_controller.rb

@@ -0,0 +1,8 @@
+class SweeperController < ActionController::Base
+  def expire_action_proxy(options)
+    options[:only_path] = true
+    path = Rails.application.routes.url_helpers.url_for(options)
+    fragment_name = "#{LocalImpressHost}#{path}"
+    expire_fragment(fragment_name)
+  end
+end

app/models/item.rb

@@ -1,3 +1,5 @@
+# requires item sweeper at bottom
+
 class Item < ActiveRecord::Base
   SwfAssetType = 'object'
   
@@ -705,3 +707,5 @@ class Item < ActiveRecord::Base
   
   class SearchError < ArgumentError;end
 end
+
+require 'item_sweeper'

app/models/item_sweeper.rb

@@ -0,0 +1,28 @@
+puts 'Hey! Item sweeper!'
+
+class ItemSweeper < ActionController::Caching::Sweeper
+  observe Item
+
+  def after_update(item)
+    expire_cache_for(item)
+  end
+
+  def after_destroy(item)
+    expire_cache_for(item)
+  end
+
+  private
+  def expire_cache_for(item)
+    options = {:controller => 'items', :action => 'show', :id => item.id}
+    expire_action(options)
+  end
+  
+  def expire_action(options)
+    if @controller
+      super
+    elsif LocalImpressHost
+      @tmp_controller ||= SweeperController.new
+      @tmp_controller.expire_action_proxy(options.dup)
+    end
+  end
+end

config/application.rb

@@ -20,7 +20,7 @@ module OpenneoImpressItems
     # config.plugins = [ :exception_notification, :ssl_requirement, :all ]
 
     # Activate observers that should always be running
-    # config.active_record.observers = :cacher, :garbage_collector, :forum_observer
+    config.active_record.observers = :item_sweeper
 
     # Set Time.zone default to the specified zone and make Active Record auto-convert to this zone.
     # Run "rake -D time" for a list of tasks for finding time zone names. Default is UTC.

config/environments/development.rb

@@ -12,7 +12,7 @@ OpenneoImpressItems::Application.configure do
   # Show full error reports and disable caching
   config.consider_all_requests_local       = true
   config.action_view.debug_rjs             = true
-  config.action_controller.perform_caching = false
+  config.action_controller.perform_caching = true #false
 
   # Don't care if the mailer can't send
   config.action_mailer.raise_delivery_errors = false
@@ -20,4 +20,6 @@ OpenneoImpressItems::Application.configure do
   config.active_support.deprecation = :log
 end
 
+LocalImpressHost = 'betanewimpress.openneo.net'
+
 RemoteImpressHost = 'beta.impress.openneo.net'

config/environments/production.rb

@@ -25,7 +25,7 @@ OpenneoImpressItems::Application.configure do
   # config.logger = SyslogLogger.new
 
   # Use a different cache store in production
-  # config.cache_store = :mem_cache_store
+  config.cache_store = :mem_cache_store
 
   # Disable Rails's static asset server
   # In production, Apache or nginx will already do this
@@ -43,6 +43,8 @@ OpenneoImpressItems::Application.configure do
   config.active_support.deprecation = :log
 end
 
+LocalImpressHost = 'newimpress.openneo.net'
+
 RemoteImpressHost = 'impress.openneo.net'
 
 USE_FIBER_POOL = true