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Moneta::Adapters::Redis

Redis backend @api public

Attributes

backend[R]

Public Class Methods

new(options = {}) click to toggle source

@param [Hash] options @option options [Integer] :expires Default expiration time @option options [::Redis] :backend Use existing backend instance @option options Other options passed to `Redis#new`

# File lib/moneta/adapters/redis.rb, line 18
def initialize(options = {})
  self.default_expires = options.delete(:expires)
  @backend = options[:backend] || ::Redis.new(options)
end

Public Instance Methods

clear(options = {}) click to toggle source

(see Proxy#clear)

# File lib/moneta/adapters/redis.rb, line 69
def clear(options = {})
  @backend.flushdb
  self
end
close() click to toggle source

(see Proxy#close)

# File lib/moneta/adapters/redis.rb, line 85
def close
  @backend.quit
  nil
end
create(key, value, options = {}) click to toggle source

(see Defaults#create)

# File lib/moneta/adapters/redis.rb, line 75
def create(key, value, options = {})
  if @backend.setnx(key, value)
    update_expires(key, options)
    true
  else
    false
  end
end
delete(key, options = {}) click to toggle source

(see Proxy#delete)

# File lib/moneta/adapters/redis.rb, line 54
def delete(key, options = {})
  if value = load(key, options)
    @backend.del(key)
    value
  end
end
increment(key, amount = 1, options = {}) click to toggle source

(see Proxy#increment)

# File lib/moneta/adapters/redis.rb, line 62
def increment(key, amount = 1, options = {})
  value = @backend.incrby(key, amount)
  update_expires(key, options)
  value
end
key?(key, options = {}) click to toggle source

(see Proxy#key?)

This method considers false and 0 as "no-expire" and every positive number as a time to live in seconds.

# File lib/moneta/adapters/redis.rb, line 27
def key?(key, options = {})
  if @backend.exists(key)
    update_expires(key, options, nil)
    true
  else
    false
  end
end
load(key, options = {}) click to toggle source

(see Proxy#load)

# File lib/moneta/adapters/redis.rb, line 37
def load(key, options = {})
  value = @backend.get(key)
  update_expires(key, options, nil)
  value
end
store(key, value, options = {}) click to toggle source

(see Proxy#store)

# File lib/moneta/adapters/redis.rb, line 44
def store(key, value, options = {})
  if expires = expires_value(options)
    @backend.setex(key, expires, value)
  else
    @backend.set(key, value)
  end
  value
end

Protected Instance Methods

update_expires(key, options, default = @default_expires) click to toggle source
# File lib/moneta/adapters/redis.rb, line 92
def update_expires(key, options, default = @default_expires)
  case expires = expires_value(options, default)
  when false
    @backend.persist(key)
  when Numeric
    @backend.expire(key, expires)
  end
end

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