blob: 9b787702b2007cd38ea1d43397b3d2e559fbea30 (
plain) (
tree)
|
|
require 'memcache'
module ActiveSupport
module Cache
class MemCacheStore < Store
module Response
STORED = "STORED\r\n"
NOT_STORED = "NOT_STORED\r\n"
EXISTS = "EXISTS\r\n"
NOT_FOUND = "NOT_FOUND\r\n"
DELETED = "DELETED\r\n"
end
attr_reader :addresses
def initialize(*addresses)
addresses = addresses.flatten
options = addresses.extract_options!
addresses = ["localhost"] if addresses.empty?
@addresses = addresses
@data = MemCache.new(addresses, options)
end
def read(key, options = nil)
super
@data.get(key, raw?(options))
rescue MemCache::MemCacheError => e
logger.error("MemCacheError (#{e}): #{e.message}")
nil
end
# Set key = value if key isn't already set. Pass :force => true
# to unconditionally set key = value. Returns a boolean indicating
# whether the key was set.
def write(key, value, options = nil)
super
method = options && options[:force] ? :set : :add
response = @data.send(method, key, value, expires_in(options), raw?(options))
response == Response::STORED
rescue MemCache::MemCacheError => e
logger.error("MemCacheError (#{e}): #{e.message}")
false
end
def delete(key, options = nil)
super
response = @data.delete(key, expires_in(options))
response == Response::DELETED
rescue MemCache::MemCacheError => e
logger.error("MemCacheError (#{e}): #{e.message}")
false
end
def delete_matched(matcher, options = nil)
super
raise "Not supported by Memcache"
end
def clear
@data.flush_all
end
private
def expires_in(options)
(options && options[:expires_in]) || 0
end
def raw?(options)
options && options[:raw]
end
end
end
end
|