Class: MixedGauge::Routing

Inherits:

Object

• Object
• MixedGauge::Routing

Defined in:

lib/mixed_gauge/routing.rb

Overview

Routing from key to database connection

Instance Method Summary

• #hash_f(key) ⇒ Integer
• #initialize(cluster_config) ⇒ Routing constructor

  A new instance of Routing.

• #route(key) ⇒ String

  slot can be one of (0..slot_size - 1).

Constructor Details

#initialize(cluster_config) ⇒ Routing

Returns a new instance of Routing.

Parameters:

• cluster_config (ClusterConfig)

# File 'lib/mixed_gauge/routing.rb', line 7

def initialize(cluster_config)
  @cluster_config = cluster_config
end

Instance Method Details

#hash_f(key) ⇒ Integer

Parameters:

• key (String)

Returns:

• (Integer)

# File 'lib/mixed_gauge/routing.rb', line 21

def hash_f(key)
  MixedGauge.config.hash_proc.call(key)
end

#route(key) ⇒ String

slot can be one of (0..slot_size - 1)

Parameters:

• dist_key (String)

Returns:

• (String) —

  connection name

# File 'lib/mixed_gauge/routing.rb', line 14

def route(key)
  slot = hash_f(key) % @cluster_config.slot_size
  @cluster_config.fetch(slot)
end