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require 'active_support/core_ext/object/duplicable'
module ActiveSupport
module Cache
# A cache store implementation which stores everything into memory in the
# same process. If you're running multiple Ruby on Rails server processes
# (which is the case if you're using mongrel_cluster or Phusion Passenger),
# then this means that your Rails server process instances won't be able
# to share cache data with each other. If your application never performs
# manual cache item expiry (e.g. when you're using generational cache keys),
# then using MemoryStore is ok. Otherwise, consider carefully whether you
# should be using this cache store.
#
# MemoryStore is not only able to store strings, but also arbitrary Ruby
# objects.
#
# MemoryStore is not thread-safe. Use SynchronizedMemoryStore instead
# if you need thread-safety.
class MemoryStore < Store
def initialize
@data = {}
end
def read(name, options = nil)
super do
@data[name]
end
end
def write(name, value, options = nil)
super do
@data[name] = (value.duplicable? ? value.dup : value).freeze
end
end
def delete(name, options = nil)
super do
@data.delete(name)
end
end
def delete_matched(matcher, options = nil)
super do
@data.delete_if { |k,v| k =~ matcher }
end
end
def exist?(name,options = nil)
super do
@data.has_key?(name)
end
end
def clear
@data.clear
end
end
end
end
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