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).

Mechanism

Dispersed cache

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

Layered in time

Expiration time of cached values is Layered.

Magic number vs Frequency

The lower the frequency, the earlier the expiration of the cache key.

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 'millas'

Or install it yourself as:

$ 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

Copyright

Copyright (c) 2017 Takuya Okuhara. Licensed under the MIT License.