switch to dalli for memcache adapter, related to #1906

Gemfile

@@ -20,7 +20,8 @@ end
 
 gem "rails", "3.2.12"
 gem "pg", "0.12.2"
-gem "memcache-client", :require => "memcache"
+gem "kgio"
+gem "dalli"
 gem "delayed_job"
 gem "delayed_job_active_record"
 gem "simple_form"

Gemfile.lock

@@ -82,6 +82,7 @@ GEM
     coderay (1.0.9)
     crack (0.3.2)
     daemons (1.1.9)
+    dalli (2.6.4)
     delayed_job (3.0.5)
       activesupport (~> 3.0)
     delayed_job_active_record (0.4.4)
@@ -106,7 +107,6 @@ GEM
       i18n (>= 0.4.0)
       mime-types (~> 1.16)
       treetop (~> 1.4.8)
-    memcache-client (1.8.5)
     metaclass (0.0.1)
     method_source (0.8.1)
     mime-types (1.22)
@@ -226,13 +226,14 @@ DEPENDENCIES
   bcrypt-ruby
   capistrano-unicorn
   daemons
+  dalli
   delayed_job
   delayed_job_active_record
   diff-lcs
   factory_girl
   ffaker!
+  kgio
   mechanize!
-  memcache-client
   mocha
   net-sftp
   net-ssh

app/logical/cache.rb

@@ -32,53 +32,44 @@ class Cache
   end
 
   def self.get(key, expiry = 0)
-    begin
-      start_time = Time.now
-      value = MEMCACHE.get key.slice(0, 200)
-      elapsed = Time.now - start_time
-      ActiveRecord::Base.logger.debug('MemCache Get (%0.6f)  %s -> %s' % [elapsed, key, value])
-      if value.nil? and block_given? then
-        value = yield
-        MEMCACHE.set key, value, expiry
-      end
-      value
-    rescue MemCache::MemCacheError => err
-      ActiveRecord::Base.logger.debug "MemCache Error: #{err.message}"
-      if block_given? then
-        value = yield
-        put key, value, expiry
-      end
-      value
+    start_time = Time.now
+    value = MEMCACHE.get key
+    elapsed = Time.now - start_time
+    ActiveRecord::Base.logger.debug('MemCache Get (%0.6f)  %s -> %s' % [elapsed, key, value])
+    if value.nil? and block_given? then
+      value = yield
+      MEMCACHE.set key, value, expiry
     end
+    value
+  rescue => err
+    ActiveRecord::Base.logger.debug "MemCache Error: #{err.message}"
+    if block_given? then
+      value = yield
+      put key, value, expiry
+    end
+    value
   end
 
   def self.put(key, value, expiry = 0)
-    key.gsub!(/\s/, "_")
-    key = key[0, 200]
-
-    begin
-      start_time = Time.now
-      MEMCACHE.set key, value, expiry
-      elapsed = Time.now - start_time
-      ActiveRecord::Base.logger.debug('MemCache Set (%0.6f)  %s -> %s' % [elapsed, key, value])
-      value
-    rescue MemCache::MemCacheError => err
-      ActiveRecord::Base.logger.debug "MemCache Error: #{err.message}"
-      nil
-    end
+    start_time = Time.now
+    MEMCACHE.set key, value, expiry
+    elapsed = Time.now - start_time
+    ActiveRecord::Base.logger.debug('MemCache Set (%0.6f)  %s -> %s' % [elapsed, key, value])
+    value
+  rescue => err
+    ActiveRecord::Base.logger.debug "MemCache Error: #{err.message}"
+    nil
   end
 
   def self.delete(key, delay = nil)
-    begin
-      start_time = Time.now
-      MEMCACHE.delete key, delay
-      elapsed = Time.now - start_time
-      ActiveRecord::Base.logger.debug('MemCache Delete (%0.6f)  %s' % [elapsed, key])
-      nil
-    rescue MemCache::MemCacheError => err
-      ActiveRecord::Base.logger.debug "MemCache Error: #{err.message}"
-      nil
-    end
+    start_time = Time.now
+    MEMCACHE.delete key, delay
+    elapsed = Time.now - start_time
+    ActiveRecord::Base.logger.debug('MemCache Delete (%0.6f)  %s' % [elapsed, key])
+    nil
+  rescue => err
+    ActiveRecord::Base.logger.debug "MemCache Error: #{err.message}"
+    nil
   end
 
   def self.sanitize(key)

app/presenters/post_presenter.rb

@@ -235,7 +235,7 @@ class PostPresenter < Presenter
 
     if pool.neighbors(@post).next
       @next_post_in_pool = pool.neighbors(@post).next
-      pool_html << template.link_to("next&thinsp;&rsaquo;".html_safe, template.post_path(pool.neighbors(@post).next, :pool_id => pool.id), :rel => next_rel, :class => "#{klass} next", :title => "to page #{pool.page_number(pool.neighbors(@post).next)}")
+      pool_html << template.link_to("next&thinsp;&rsaquo;".html_safe, template.post_path(@next_post_in_pool, :pool_id => pool.id), :rel => next_rel, :class => "#{klass} next", :title => "to page #{pool.page_number(@next_post_in_pool)}")
       match_found = true
     else
       pool_html << '<span class="next">next&thinsp;&rsaquo;</span>'

config/environments/production.rb

@@ -40,7 +40,7 @@ Danbooru::Application.configure do
   # config.logger = ActiveSupport::TaggedLogging.new(SyslogLogger.new)
 
   # Use a different cache store in production
-  # config.cache_store = :mem_cache_store
+  config.cache_store = :dalli_store, Danbooru.config.memcached_servers
 
   # Enable serving of images, stylesheets, and JavaScripts from an asset server
   # config.action_controller.asset_host = "http://assets.example.com"

config/initializers/memcache.rb

@@ -1,6 +0,0 @@
-require 'memcache'
-
-unless defined?(MEMCACHE)
-  MEMCACHE = MemCache.new :c_threshold => 10_000, :compression => true, :debug => false, :namespace => Danbooru.config.app_name.gsub(/[^A-Za-z0-9]/, "_"), :readonly => false, :urlencode => false
-  MEMCACHE.servers = Danbooru.config.memcached_servers
-end

config/initializers/z_dalli.rb

@@ -0,0 +1,3 @@
+unless defined?(MEMCACHE)
+  MEMCACHE = Dalli::Client.new(Danbooru.config.memcached_servers, :namespace => Danbooru.config.app_name.gsub(/[^A-Za-z0-9]/, "_"))
+end