Millas

Millas is a simple cache mechanism. In this mechanism, cached values are dispersed and layered in time.

By the way, Millas is a magic cake which becomes 3 layers when baked once. And it is traditional sweets in Landes (France).

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Mechanism

Dispersed cache

Cached values whose key is appended random and specified number to the end.

0001

Layered in time

Expiration time of cached values is Layered.

millas-2-1

Usage

It is not conscious of Milas.

cache = ActiveSupport::Cache::DalliStore.new

cache.write('millas', 'cake', expires_in: 1.minutes)
# Cache write: millas-1 ({:expires_in=>60 seconds})
# Cache write: millas-2 ({:expires_in=>120 seconds})
# Cache write: millas-3 ({:expires_in=>180 seconds})
=> 90916417477541888

cache.read('millas')
# Cache read: millas-2
=> "cake"

cache.exist?('millas')
# Cache exist: millas-1
=> true

cache.delete('millas')
# Cache delete: millas-1
# Cache delete: millas-2
# Cache delete: millas-3
=> true

Installation

Add this line to your application's Gemfile:

gem 'dalli'
gem 'millas'

Or install it yourself as:

$ gem install dalli
$ gem install millas

Configuration

Millas.configure do |config|
  config.dispersion_number = 5 # default
  config.perform_dispersing = true # default
  config.second_intervals = 60 # default
end

If this mechanism is adopted only for a specific part, it should do as follows.

Millas.config.perform_dispersing = false

cache.write('millas', 'cake', expires_in: 1.minutes)
# Cache write: millas ({:expires_in=>60 seconds})
=> 883549951894749184

cache.write('millas', 'cake', expires_in: 1.minutes, dispersed: true)
# Cache write: millas-1 ({:expires_in=>60 seconds})
# Cache write: millas-2 ({:expires_in=>120 seconds})
# Cache write: millas-3 ({:expires_in=>180 seconds})
=> 15366844878541553664