diff options
Diffstat (limited to 'activesupport/lib/active_support/cache.rb')
| -rw-r--r-- | activesupport/lib/active_support/cache.rb | 116 |
1 files changed, 47 insertions, 69 deletions
diff --git a/activesupport/lib/active_support/cache.rb b/activesupport/lib/active_support/cache.rb index a3f672d4cc..3996f583c2 100644 --- a/activesupport/lib/active_support/cache.rb +++ b/activesupport/lib/active_support/cache.rb @@ -8,7 +8,6 @@ require 'active_support/core_ext/numeric/bytes' require 'active_support/core_ext/numeric/time' require 'active_support/core_ext/object/to_param' require 'active_support/core_ext/string/inflections' -require 'active_support/deprecation' module ActiveSupport # See ActiveSupport::Cache::Store for documentation. @@ -27,7 +26,7 @@ module ActiveSupport end class << self - # Creates a new CacheStore object according to the given options. + # Creates a new Store object according to the given options. # # If no arguments are passed to this method, then a new # ActiveSupport::Cache::MemoryStore object will be returned. @@ -179,18 +178,6 @@ module ActiveSupport @silence = previous_silence end - # :deprecated: - def self.instrument=(boolean) - ActiveSupport::Deprecation.warn "ActiveSupport::Cache.instrument= is deprecated and will be removed in Rails 5. Instrumentation is now always on so you can safely stop using it." - true - end - - # :deprecated: - def self.instrument - ActiveSupport::Deprecation.warn "ActiveSupport::Cache.instrument is deprecated and will be removed in Rails 5. Instrumentation is now always on so you can safely stop using it." - true - end - # Fetches data from the cache, using the given key. If there is data in # the cache with the given key, then that data is returned. # @@ -237,7 +224,7 @@ module ActiveSupport # seconds. Because of extended life of the previous cache, other processes # 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. + # new value. After that all the processes will start getting the new value. # The key is to keep <tt>:race_condition_ttl</tt> small. # # If the process regenerating the entry errors out, the entry will be @@ -290,13 +277,18 @@ module ActiveSupport options = merged_options(options) key = namespaced_key(name, options) - cached_entry = find_cached_entry(key, name, options) unless options[:force] - entry = handle_expired_entry(cached_entry, key, options) + instrument(:read, name, options) do |payload| + cached_entry = read_entry(key, options) unless options[:force] + payload[:super_operation] = :fetch if payload + entry = handle_expired_entry(cached_entry, key, options) - if entry - get_entry_value(entry, name, options) - else - save_block_result_to_cache(name, options) { |_name| yield _name } + if entry + payload[:hit] = true if payload + get_entry_value(entry, name, options) + else + payload[:hit] = false if payload + save_block_result_to_cache(name, options) { |_name| yield _name } + end end else read(name, options) @@ -338,19 +330,22 @@ module ActiveSupport def read_multi(*names) options = names.extract_options! options = merged_options(options) - results = {} - names.each do |name| - key = namespaced_key(name, options) - entry = read_entry(key, options) - if entry - if entry.expired? - delete_entry(key, options) - else - results[name] = entry.value + + instrument_multi(:read, names, options) do |payload| + results = {} + names.each do |name| + key = namespaced_key(name, options) + entry = read_entry(key, options) + if entry + if entry.expired? + delete_entry(key, options) + else + results[name] = entry.value + end end end + results end - results end # Fetches data from the cache, using the given keys. If there is data in @@ -363,8 +358,11 @@ module ActiveSupport # 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" => "bam", "boom" => "boomboom" } + # cache.fetch_multi("bim", "unknown_key") do |key| + # "Fallback value for key: #{key}" + # end + # # => { "bim" => "bam", + # # "unknown_key" => "Fallback value for key: unknown_key" } # def fetch_multi(*names) options = names.extract_options! @@ -540,31 +538,35 @@ module ActiveSupport end def instrument(operation, key, options = nil) - log(operation, key, options) + log { "Cache #{operation}: #{key}#{options.blank? ? "" : " (#{options.inspect})"}" } payload = { :key => key } payload.merge!(options) if options.is_a?(Hash) ActiveSupport::Notifications.instrument("cache_#{operation}.active_support", payload){ yield(payload) } end - def log(operation, key, options = nil) - return unless logger && logger.debug? && !silence? - logger.debug("Cache #{operation}: #{key}#{options.blank? ? "" : " (#{options.inspect})"}") + def instrument_multi(operation, keys, options = nil) + log do + formatted_keys = keys.map { |k| "- #{k}" }.join("\n") + "Caches multi #{operation}:\n#{formatted_keys}#{options.blank? ? "" : " (#{options.inspect})"}" + end + + payload = { key: keys } + payload.merge!(options) if options.is_a?(Hash) + ActiveSupport::Notifications.instrument("cache_#{operation}_multi.active_support", payload) { yield(payload) } end - def find_cached_entry(key, name, options) - instrument(:read, name, options) do |payload| - payload[:super_operation] = :fetch if payload - read_entry(key, options) - end + def log + return unless logger && logger.debug? && !silence? + logger.debug(yield) end def handle_expired_entry(entry, key, options) if entry && entry.expired? race_ttl = options[:race_condition_ttl].to_i - if race_ttl && (Time.now.to_f - entry.expires_at <= race_ttl) - # When an entry has :race_condition_ttl defined, put the stale entry back into the cache - # for a brief period while the entry is begin recalculated. + if (race_ttl > 0) && (Time.now.to_f - entry.expires_at <= race_ttl) + # When an entry has a positive :race_condition_ttl defined, put the stale entry back into the cache + # for a brief period while the entry is being recalculated. entry.expires_at = Time.now + race_ttl write_entry(key, entry, :expires_in => race_ttl * 2) else @@ -615,14 +617,12 @@ module ActiveSupport end def value - convert_version_4beta1_entry! if defined?(@v) compressed? ? uncompress(@value) : @value end # Check if the entry is expired. The +expires_in+ parameter can override # the value set when the entry was created. def expired? - convert_version_4beta1_entry! if defined?(@value) @expires_in && @created_at + @expires_in <= Time.now.to_f end @@ -658,8 +658,6 @@ module ActiveSupport # Duplicate the value in a class. This is used by cache implementations that don't natively # 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 @@ -692,26 +690,6 @@ module ActiveSupport def uncompress(value) Marshal.load(Zlib::Inflate.inflate(value)) end - - # The internals of this method changed between Rails 3.x and 4.0. This method provides the glue - # to ensure that cache entries created under the old version still work with the new class definition. - def convert_version_4beta1_entry! - if defined?(@v) - @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 - remove_instance_variable(:@x) - end - end end end end |