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()
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# File lib/rack/cache/storage.rb, line 60 def self.instance @@singleton_instance end
new()
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# File lib/rack/cache/storage.rb, line 12 def initialize @metastores = {} @entitystores = {} end
Public Instance Methods
clear()
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# File lib/rack/cache/storage.rb, line 25 def clear @metastores.clear @entitystores.clear nil end
resolve_entitystore_uri(uri, options = {})
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# File lib/rack/cache/storage.rb, line 21 def resolve_entitystore_uri(uri, options = {}) @entitystores[uri.to_s] ||= create_store(EntityStore, uri, options) end
resolve_metastore_uri(uri, options = {})
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# File lib/rack/cache/storage.rb, line 17 def resolve_metastore_uri(uri, options = {}) @metastores[uri.to_s] ||= create_store(MetaStore, uri, options) end
Private Instance Methods
create_store(type, uri, options = {})
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# File lib/rack/cache/storage.rb, line 33 def create_store(type, uri, options = {}) if uri.respond_to?(:scheme) || uri.respond_to?(:to_str) uri = URI.parse(uri) unless uri.respond_to?(:scheme) if type.const_defined?(uri.scheme.upcase) klass = type.const_get(uri.scheme.upcase) return klass.resolve(uri) if klass.method(:resolve).arity == 1 klass.resolve(uri, options) else fail "Unknown storage provider: #{uri.to_s}" end else # hack in support for passing a Dalli::Client or Memcached object # as the storage URI. case when defined?(::Dalli) && uri.kind_of?(::Dalli::Client) type.const_get(:Dalli).resolve(uri) when defined?(::Memcached) && uri.respond_to?(:stats) type.const_get(:MemCached).resolve(uri) else fail "Unknown storage provider: #{uri.to_s}" end end end