95 lines
2.5 KiB
Ruby
95 lines
2.5 KiB
Ruby
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require 'memcache'
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module ActiveSupport
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module Cache
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class MemCacheStore < Store
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module Response
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STORED = "STORED\r\n"
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NOT_STORED = "NOT_STORED\r\n"
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EXISTS = "EXISTS\r\n"
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NOT_FOUND = "NOT_FOUND\r\n"
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DELETED = "DELETED\r\n"
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end
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attr_reader :addresses
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def initialize(*addresses)
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addresses = addresses.flatten
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options = addresses.extract_options!
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addresses = ["localhost"] if addresses.empty?
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@addresses = addresses
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@data = MemCache.new(addresses, options)
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end
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def read(key, options = nil)
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super
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@data.get(key, raw?(options))
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rescue MemCache::MemCacheError => e
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logger.error("MemCacheError (#{e}): #{e.message}")
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nil
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end
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# Set key = value. Pass :unless_exist => true if you don't
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# want to update the cache if the key is already set.
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def write(key, value, options = nil)
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super
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method = options && options[:unless_exist] ? :add : :set
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response = @data.send(method, key, value, expires_in(options), raw?(options))
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response == Response::STORED
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rescue MemCache::MemCacheError => e
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logger.error("MemCacheError (#{e}): #{e.message}")
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false
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end
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def delete(key, options = nil)
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super
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response = @data.delete(key, expires_in(options))
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response == Response::DELETED
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rescue MemCache::MemCacheError => e
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logger.error("MemCacheError (#{e}): #{e.message}")
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false
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end
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def increment(key, amount = 1)
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log("incrementing", key, amount)
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response = @data.incr(key, amount)
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response == Response::NOT_FOUND ? nil : response
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rescue MemCache::MemCacheError
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nil
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end
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def decrement(key, amount = 1)
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log("decrement", key, amount)
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response = data.decr(key, amount)
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response == Response::NOT_FOUND ? nil : response
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rescue MemCache::MemCacheError
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nil
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end
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def delete_matched(matcher, options = nil)
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super
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raise "Not supported by Memcache"
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end
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def clear
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@data.flush_all
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end
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def stats
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@data.stats
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end
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private
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def expires_in(options)
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(options && options[:expires_in]) || 0
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end
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def raw?(options)
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options && options[:raw]
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end
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end
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end
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end
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