diff options
Diffstat (limited to 'actionview/lib/action_view/digestor.rb')
| -rw-r--r-- | actionview/lib/action_view/digestor.rb | 85 |
1 files changed, 48 insertions, 37 deletions
diff --git a/actionview/lib/action_view/digestor.rb b/actionview/lib/action_view/digestor.rb index 5570e2a8dc..12e9723a02 100644 --- a/actionview/lib/action_view/digestor.rb +++ b/actionview/lib/action_view/digestor.rb @@ -1,80 +1,91 @@ -require 'thread_safe' +require 'concurrent' require 'action_view/dependency_tracker' require 'monitor' module ActionView class Digestor cattr_reader(:cache) - @@cache = ThreadSafe::Cache.new + @@cache = Concurrent::Map.new @@digest_monitor = Monitor.new + class PerRequestDigestCacheExpiry < Struct.new(:app) # :nodoc: + def call(env) + ActionView::Digestor.cache.clear + app.call(env) + end + end + class << self - def digest(name, format, finder, options = {}) - details_key = finder.details_key.hash - dependencies = Array.wrap(options[:dependencies]) - cache_key = ([name, details_key, format] + dependencies).join('.') + # Supported options: + # + # * <tt>name</tt> - Template name + # * <tt>finder</tt> - An instance of <tt>ActionView::LookupContext</tt> + # * <tt>dependencies</tt> - An array of dependent views + # * <tt>partial</tt> - Specifies whether the template is a partial + def digest(options) + options.assert_valid_keys(:name, :finder, :dependencies, :partial) + + cache_key = ([ options[:name], options[:finder].details_key.hash ].compact + Array.wrap(options[:dependencies])).join('.') # this is a correctly done double-checked locking idiom - # (ThreadSafe::Cache's lookups have volatile semantics) + # (Concurrent::Map's lookups have volatile semantics) @@cache[cache_key] || @@digest_monitor.synchronize do @@cache.fetch(cache_key) do # re-check under lock - compute_and_store_digest(cache_key, name, format, finder, options) + compute_and_store_digest(cache_key, options) end end end private - def compute_and_store_digest(cache_key, name, format, finder, options) # called under @@digest_monitor lock - klass = if options[:partial] || name.include?("/_") - # Prevent re-entry or else recursive templates will blow the stack. - # There is no need to worry about other threads seeing the +false+ value, - # as they will then have to wait for this thread to let go of the @@digest_monitor lock. - pre_stored = @@cache.put_if_absent(cache_key, false).nil? # put_if_absent returns nil on insertion - PartialDigestor - else - Digestor - end + def compute_and_store_digest(cache_key, options) # called under @@digest_monitor lock + klass = if options[:partial] || options[:name].include?("/_") + # Prevent re-entry or else recursive templates will blow the stack. + # There is no need to worry about other threads seeing the +false+ value, + # as they will then have to wait for this thread to let go of the @@digest_monitor lock. + pre_stored = @@cache.put_if_absent(cache_key, false).nil? # put_if_absent returns nil on insertion + PartialDigestor + else + Digestor + end - digest = klass.new(name, format, finder, options).digest - # Store the actual digest if config.cache_template_loading is true - @@cache[cache_key] = stored_digest = digest if ActionView::Resolver.caching? - digest - ensure - # something went wrong or ActionView::Resolver.caching? is false, make sure not to corrupt the @@cache - @@cache.delete_pair(cache_key, false) if pre_stored && !stored_digest - end + @@cache[cache_key] = stored_digest = klass.new(options).digest + ensure + # something went wrong or ActionView::Resolver.caching? is false, make sure not to corrupt the @@cache + @@cache.delete_pair(cache_key, false) if pre_stored && !stored_digest + end end - attr_reader :name, :format, :finder, :options + attr_reader :name, :finder, :options - def initialize(name, format, finder, options={}) - @name, @format, @finder, @options = name, format, finder, options + def initialize(options) + @name, @finder = options.values_at(:name, :finder) + @options = options.except(:name, :finder) end def digest Digest::MD5.hexdigest("#{source}-#{dependency_digest}").tap do |digest| - logger.try :info, "Cache digest for #{name}.#{format}: #{digest}" + logger.try :debug, " Cache digest for #{template.inspect}: #{digest}" end rescue ActionView::MissingTemplate - logger.try :error, "Couldn't find template for digesting: #{name}.#{format}" + logger.try :error, " Couldn't find template for digesting: #{name}" '' end def dependencies - DependencyTracker.find_dependencies(name, template) + DependencyTracker.find_dependencies(name, template, finder.view_paths) rescue ActionView::MissingTemplate - [] # File doesn't exist, so no dependencies + logger.try :error, " '#{name}' file doesn't exist, so no dependencies" + [] end def nested_dependencies dependencies.collect do |dependency| - dependencies = PartialDigestor.new(dependency, format, finder).nested_dependencies + dependencies = PartialDigestor.new(name: dependency, finder: finder).nested_dependencies dependencies.any? ? { dependency => dependencies } : dependency end end private - def logger ActionView::Base.logger end @@ -88,7 +99,7 @@ module ActionView end def template - @template ||= finder.find(logical_name, [], partial?, formats: [ format ]) + @template ||= finder.disable_cache { finder.find(logical_name, [], partial?) } end def source @@ -97,7 +108,7 @@ module ActionView def dependency_digest template_digests = dependencies.collect do |template_name| - Digestor.digest(template_name, format, finder, partial: true) + Digestor.digest(name: template_name, finder: finder, partial: true) end (template_digests + injected_dependencies).join("-") |