diff options
Diffstat (limited to 'activesupport/lib/active_support/cache.rb')
| -rw-r--r-- | activesupport/lib/active_support/cache.rb | 75 |
1 files changed, 41 insertions, 34 deletions
diff --git a/activesupport/lib/active_support/cache.rb b/activesupport/lib/active_support/cache.rb index b1ab5570a8..a627fa8651 100644 --- a/activesupport/lib/active_support/cache.rb +++ b/activesupport/lib/active_support/cache.rb @@ -3,7 +3,7 @@ require 'zlib' require 'active_support/core_ext/array/extract_options' require 'active_support/core_ext/array/wrap' require 'active_support/core_ext/benchmark' -require 'active_support/core_ext/class/attribute_accessors' +require 'active_support/core_ext/module/attribute_accessors' require 'active_support/core_ext/numeric/bytes' require 'active_support/core_ext/numeric/time' require 'active_support/core_ext/object/to_param' @@ -12,10 +12,10 @@ require 'active_support/core_ext/string/inflections' module ActiveSupport # See ActiveSupport::Cache::Store for documentation. module Cache - autoload :FileStore, 'active_support/cache/file_store' - autoload :MemoryStore, 'active_support/cache/memory_store' + autoload :FileStore, 'active_support/cache/file_store' + autoload :MemoryStore, 'active_support/cache/memory_store' autoload :MemCacheStore, 'active_support/cache/mem_cache_store' - autoload :NullStore, 'active_support/cache/null_store' + autoload :NullStore, 'active_support/cache/null_store' # These options mean something to all cache implementations. Individual cache # implementations may support additional options. @@ -88,25 +88,24 @@ module ActiveSupport end private + def retrieve_cache_key(key) + case + when key.respond_to?(:cache_key) then key.cache_key + when key.is_a?(Array) then key.map { |element| retrieve_cache_key(element) }.to_param + when key.respond_to?(:to_a) then retrieve_cache_key(key.to_a) + else key.to_param + end.to_s + end - def retrieve_cache_key(key) - case - when key.respond_to?(:cache_key) then key.cache_key - when key.is_a?(Array) then key.map { |element| retrieve_cache_key(element) }.to_param - when key.respond_to?(:to_a) then retrieve_cache_key(key.to_a) - else key.to_param - end.to_s - end - - # Obtains the specified cache store class, given the name of the +store+. - # Raises an error when the store class cannot be found. - def retrieve_store_class(store) - require "active_support/cache/#{store}" - rescue LoadError => e - raise "Could not find cache store adapter for #{store} (#{e})" - else - ActiveSupport::Cache.const_get(store.to_s.camelize) - end + # Obtains the specified cache store class, given the name of the +store+. + # Raises an error when the store class cannot be found. + def retrieve_store_class(store) + require "active_support/cache/#{store}" + rescue LoadError => e + raise "Could not find cache store adapter for #{store} (#{e})" + else + ActiveSupport::Cache.const_get(store.to_s.camelize) + end end # An abstract cache store class. There are multiple cache store @@ -153,7 +152,6 @@ module ActiveSupport # or +write+. To specify the threshold at which to compress values, set the # <tt>:compress_threshold</tt> option. The default threshold is 16K. class Store - cattr_accessor :logger, :instance_writer => true attr_reader :silence, :options @@ -228,13 +226,13 @@ module ActiveSupport # # Setting <tt>:race_condition_ttl</tt> is very useful in situations where # a cache entry is used very frequently and is under heavy load. If a - # cache expires and due to heavy load seven different processes will try + # cache expires and due to heavy load several different processes will try # to read data natively and then they all will try to write to cache. To # avoid that case the first process to find an expired cache entry will # bump the cache expiration time by the value set in <tt>:race_condition_ttl</tt>. # Yes, this process is extending the time for a stale value by another few # seconds. Because of extended life of the previous cache, other processes - # will continue to use slightly stale data for a just a big longer. In the + # will continue to use slightly stale data for a just a bit longer. In the # meantime that first process will go ahead and will write into cache the # new value. After that all the processes will start getting new value. # The key is to keep <tt>:race_condition_ttl</tt> small. @@ -359,20 +357,19 @@ module ActiveSupport # # Options are passed to the underlying cache implementation. # - # Returns an array with the data for each of the names. For example: + # Returns a hash with the data for each of the names. For example: # # cache.write("bim", "bam") - # cache.fetch_multi("bim", "boom") {|key| key * 2 } - # #=> ["bam", "boomboom"] + # cache.fetch_multi("bim", "boom") { |key| key * 2 } + # # => { "bam" => "bam", "boom" => "boomboom" } # def fetch_multi(*names) options = names.extract_options! options = merged_options(options) - results = read_multi(*names, options) - names.map do |name| - results.fetch(name) do + names.each_with_object({}) do |name, memo| + memo[name] = results.fetch(name) do value = yield name write(name, value, options) value @@ -385,6 +382,7 @@ module ActiveSupport # Options are passed to the underlying cache implementation. def write(name, value, options = nil) options = merged_options(options) + instrument(:write, name, options) do entry = Entry.new(value, options) write_entry(namespaced_key(name, options), entry, options) @@ -396,19 +394,21 @@ module ActiveSupport # Options are passed to the underlying cache implementation. def delete(name, options = nil) options = merged_options(options) + instrument(:delete, name) do delete_entry(namespaced_key(name, options), options) end end - # Return +true+ if the cache contains an entry for the given key. + # Returns +true+ if the cache contains an entry for the given key. # # Options are passed to the underlying cache implementation. def exist?(name, options = nil) options = merged_options(options) + instrument(:exist?, name) do entry = read_entry(namespaced_key(name, options), options) - entry && !entry.expired? + (entry && !entry.expired?) || false end end @@ -451,7 +451,7 @@ module ActiveSupport # Clear the entire cache. Be careful with this method since it could # affect other processes if shared cache is being used. # - # Options are passed to the underlying cache implementation. + # The options hash is passed to the underlying cache implementation. # # All implementations may not support this method. def clear(options = nil) @@ -585,6 +585,7 @@ module ActiveSupport result = instrument(:generate, name, options) do |payload| yield(name) end + write(name, result, options) result end @@ -608,6 +609,7 @@ module ActiveSupport else @value = value end + @created_at = Time.now.to_f @expires_in = options[:expires_in] @expires_in = @expires_in.to_f if @expires_in @@ -658,6 +660,7 @@ module ActiveSupport # serialize entries to protect against accidental cache modifications. def dup_value! convert_version_4beta1_entry! if defined?(@v) + if @value && !compressed? && !(@value.is_a?(Numeric) || @value == true || @value == false) if @value.is_a?(String) @value = @value.dup @@ -672,8 +675,10 @@ module ActiveSupport if value && options[:compress] compress_threshold = options[:compress_threshold] || DEFAULT_COMPRESS_LIMIT serialized_value_size = (value.is_a?(String) ? value : Marshal.dump(value)).bytesize + return true if serialized_value_size >= compress_threshold end + false end @@ -696,10 +701,12 @@ module ActiveSupport @value = @v remove_instance_variable(:@v) end + if defined?(@c) @compressed = @c remove_instance_variable(:@c) end + if defined?(@x) && @x @created_at ||= Time.now.to_f @expires_in = @x - @created_at |