Class: ActiveRecord::Turntable::Algorithm::ModuloAlgorithm

Inherits:
Base
  • Object
show all
Defined in:
lib/active_record/turntable/algorithm/modulo_algorithm.rb

Instance Method Summary collapse

Constructor Details

#initialize(config) ⇒ ModuloAlgorithm

Returns a new instance of ModuloAlgorithm.



4
5
6
 
# File 'lib/active_record/turntable/algorithm/modulo_algorithm.rb', line 4

def initialize(config)
  @config = config
end

Instance Method Details

#calculate(key) ⇒ Object 



8
9
10
11
12
 
# File 'lib/active_record/turntable/algorithm/modulo_algorithm.rb', line 8

def calculate(key)
  @config["shards"][key % @config["shards"].size]["connection"]
rescue
  raise ActiveRecord::Turntable::CannotSpecifyShardError, "cannot specify shard for key:#{key}"
end