diff options
Diffstat (limited to 'activesupport/lib/active_support/cache.rb')
| -rw-r--r-- | activesupport/lib/active_support/cache.rb | 100 |
1 files changed, 67 insertions, 33 deletions
diff --git a/activesupport/lib/active_support/cache.rb b/activesupport/lib/active_support/cache.rb index 9f91f9b576..8301b8c7cb 100644 --- a/activesupport/lib/active_support/cache.rb +++ b/activesupport/lib/active_support/cache.rb @@ -12,10 +12,11 @@ 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 :MemCacheStore, "active_support/cache/mem_cache_store" - autoload :NullStore, "active_support/cache/null_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 :RedisCacheStore, "active_support/cache/redis_cache_store" # These options mean something to all cache implementations. Individual cache # implementations may support additional options. @@ -90,16 +91,11 @@ module ActiveSupport private def retrieve_cache_key(key) case - when key.respond_to?(:cache_key_with_version) - key.cache_key_with_version - when key.respond_to?(:cache_key) - key.cache_key - when key.is_a?(Hash) - key.sort_by { |k, _| k.to_s }.collect { |k, v| "#{k}=#{v}" }.to_param - when key.respond_to?(:to_a) - key.to_a.collect { |element| retrieve_cache_key(element) }.to_param - else - key.to_param + when key.respond_to?(:cache_key_with_version) then key.cache_key_with_version + 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 @@ -153,12 +149,11 @@ module ActiveSupport # cache.namespace = -> { @last_mod_time } # Set the namespace to a variable # @last_mod_time = Time.now # Invalidate the entire cache by changing namespace # - # Caches can also store values in a compressed format to save space and - # reduce time spent sending data. Since there is overhead, values must be - # large enough to warrant compression. To turn on compression either pass - # <tt>compress: true</tt> in the initializer or as an option to +fetch+ - # or +write+. To specify the threshold at which to compress values, set the - # <tt>:compress_threshold</tt> option. The default threshold is 16K. + # Cached data larger than 1kB are compressed by default. To turn off + # compression, pass <tt>compress: false</tt> to the initializer or to + # individual +fetch+ or +write+ method calls. The 1kB compression + # threshold is configurable with the <tt>:compress_threshold</tt> option, + # specified in bytes. class Store cattr_accessor :logger, instance_writer: true @@ -217,8 +212,7 @@ module ActiveSupport # ask whether you should force a cache write. Otherwise, it's clearer to # just call <tt>Cache#write</tt>. # - # Setting <tt>:compress</tt> will store a large cache entry set by the call - # in a compressed format. + # Setting <tt>compress: false</tt> disables compression of the cache entry. # # Setting <tt>:expires_in</tt> will set an expiration time on the cache. # All caches support auto-expiring content after a specified number of @@ -567,14 +561,54 @@ module ActiveSupport end end - # Prefixes a key with the namespace. Namespace and key will be delimited - # with a colon. - def normalize_key(key, options) - key = Cache.expand_cache_key(key) - namespace = options[:namespace] if options - prefix = namespace.is_a?(Proc) ? namespace.call : namespace - key = "#{prefix}:#{key}" if prefix - key + # Expands and namespaces the cache key. May be overridden by + # cache stores to do additional normalization. + def normalize_key(key, options = nil) + namespace_key expanded_key(key), options + end + + # Prefix the key with a namespace string: + # + # namespace_key 'foo', namespace: 'cache' + # # => 'cache:foo' + # + # With a namespace block: + # + # namespace_key 'foo', namespace: -> { 'cache' } + # # => 'cache:foo' + def namespace_key(key, options = nil) + options = merged_options(options) + namespace = options[:namespace] + + if namespace.respond_to?(:call) + namespace = namespace.call + end + + if namespace + "#{namespace}:#{key}" + else + key + end + end + + # Expands key to be a consistent string value. Invokes +cache_key+ if + # object responds to +cache_key+. Otherwise, +to_param+ method will be + # called. If the key is a Hash, then keys will be sorted alphabetically. + def expanded_key(key) + return key.cache_key.to_s if key.respond_to?(:cache_key) + + case key + when Array + if key.size > 1 + key = key.collect { |element| expanded_key(element) } + else + key = key.first + end + when Hash + key = key.sort_by { |k, _| k.to_s }.collect { |k, v| "#{k}=#{v}" } + end + + key.to_param end def normalize_version(key, options = nil) @@ -643,7 +677,7 @@ module ActiveSupport class Entry # :nodoc: attr_reader :version - DEFAULT_COMPRESS_LIMIT = 16.kilobytes + DEFAULT_COMPRESS_LIMIT = 1.kilobyte # Creates a new cache entry for the specified value. Options supported are # +:compress+, +:compress_threshold+, and +:expires_in+. @@ -718,8 +752,8 @@ module ActiveSupport private def should_compress?(value, options) - if value && options[:compress] - compress_threshold = options[:compress_threshold] || DEFAULT_COMPRESS_LIMIT + if value && options.fetch(:compress, true) + compress_threshold = options.fetch(: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 |