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Moneta::Adapters::MemcachedNative

Memcached backend (using gem memcached) @api public

Attributes

backend[R]

Public Class Methods

new(options = {}) click to toggle source

@param [Hash] options @option options [String] :server ('127.0.0.1:11211') Memcached server @option options [String] :namespace Key namespace @option options [Integer] :expires (604800) Default expiration time @option options [::Memcached] :backend Use existing backend instance @option options Other options passed to `Memcached#new`

# File lib/moneta/adapters/memcached/native.rb, line 20
def initialize(options = {})
  server = options.delete(:server) || '127.0.0.1:11211'
  self.default_expires = options.delete(:expires)
  @backend = options[:backend] ||
    begin
      options.merge!(:prefix_key => options.delete(:namespace)) if options[:namespace]
      # We don't want a limitation on the key charset. Therefore we use the binary protocol.
      # It is also faster.
      options[:binary_protocol] = true unless options.include?(:binary_protocol)
      ::Memcached.new(server, options)
    end
end

Public Instance Methods

clear(options = {}) click to toggle source

(see Proxy#clear)

# File lib/moneta/adapters/memcached/native.rb, line 84
def clear(options = {})
  @backend.flush
  self
end
create(key, value, options = {}) click to toggle source

(see Defaults#create)

# File lib/moneta/adapters/memcached/native.rb, line 76
def create(key, value, options = {})
  @backend.add(key, value, expires_value(options) || 0, false)
  true
rescue ::Memcached::ConnectionDataExists
  false
end
delete(key, options = {}) click to toggle source

(see Proxy#delete)

# File lib/moneta/adapters/memcached/native.rb, line 52
def delete(key, options = {})
  value = @backend.get(key, false)
  @backend.delete(key)
  value
rescue ::Memcached::NotFound
end
increment(key, amount = 1, options = {}) click to toggle source

(see Proxy#increment)

# File lib/moneta/adapters/memcached/native.rb, line 60
def increment(key, amount = 1, options = {})
  result = if amount >= 0
    @backend.increment(key, amount)
  else
    @backend.decrement(key, -amount)
  end
  # HACK: Throw error if applied to invalid value
  # see https://github.com/evan/memcached/issues/110
  Utils.to_int((@backend.get(key, false) rescue nil)) if result == 0
  result
rescue ::Memcached::NotFound => ex
  retry unless create(key, amount.to_s, options)
  amount
end
load(key, options = {}) click to toggle source

(see Proxy#load)

# File lib/moneta/adapters/memcached/native.rb, line 34
def load(key, options = {})
  value = @backend.get(key, false)
  if value
    expires = expires_value(options, nil)
    @backend.set(key, value, expires || 0, false) if expires != nil
    value
  end
rescue ::Memcached::NotFound
end
store(key, value, options = {}) click to toggle source

(see Proxy#store)

# File lib/moneta/adapters/memcached/native.rb, line 45
def store(key, value, options = {})
  # TTL must be Fixnum
  @backend.set(key, value, expires_value(options) || 0, false)
  value
end

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