class Rack::Cache::Storage

Maintains a collection of MetaStore and EntityStore instances keyed by URI. A single instance of this class can be used across a single process to ensure that only a single instance of a backing store is created per unique storage URI.

Public Class Methods

instance() click to toggle source
   # File lib/rack/cache/storage.rb
60 def self.instance
61   @@singleton_instance
62 end
new() click to toggle source
   # File lib/rack/cache/storage.rb
12 def initialize
13   @metastores = {}
14   @entitystores = {}
15 end

Public Instance Methods

clear() click to toggle source
   # File lib/rack/cache/storage.rb
25 def clear
26   @metastores.clear
27   @entitystores.clear
28   nil
29 end
resolve_entitystore_uri(uri, options = {}) click to toggle source
   # File lib/rack/cache/storage.rb
21 def resolve_entitystore_uri(uri, options = {})
22   @entitystores[uri.to_s] ||= create_store(EntityStore, uri, options)
23 end
resolve_metastore_uri(uri, options = {}) click to toggle source
   # File lib/rack/cache/storage.rb
17 def resolve_metastore_uri(uri, options = {})
18   @metastores[uri.to_s] ||= create_store(MetaStore, uri, options)
19 end

Private Instance Methods

create_store(type, uri, options = {}) click to toggle source
   # File lib/rack/cache/storage.rb
33 def create_store(type, uri, options = {})
34   if uri.respond_to?(:scheme) || uri.respond_to?(:to_str)
35     uri = URI.parse(uri) unless uri.respond_to?(:scheme)
36     if type.const_defined?(uri.scheme.upcase)
37       klass = type.const_get(uri.scheme.upcase)
38       return klass.resolve(uri) if klass.method(:resolve).arity == 1
39       klass.resolve(uri, options)
40     else
41       fail "Unknown storage provider: #{uri.to_s}"
42     end
43   else
44     # hack in support for passing a Dalli::Client or Memcached object
45     # as the storage URI.
46     case
47     when defined?(::Dalli) && uri.kind_of?(::Dalli::Client)
48       type.const_get(:Dalli).resolve(uri)
49     when defined?(::Memcached) && uri.respond_to?(:stats)
50       type.const_get(:MemCached).resolve(uri)
51     else
52       fail "Unknown storage provider: #{uri.to_s}"
53     end
54   end
55 end