class ReplicaPools::Pools
Public Class Methods
new()
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Calls superclass method
# File lib/replica_pools/pools.rb, line 7 def initialize pools = {} pool_configurations.group_by{|_, name, _| name }.each do |name, set| pools[name.to_sym] = ReplicaPools::Pool.new( name, set.map{ |conn_name, _, replica_name| connection_class(name, replica_name, conn_name) } ) end if pools.empty? ReplicaPools.log :info, "No pools found for #{ReplicaPools.config.environment}. Loading a default pool with leader instead." pools[:default] = ReplicaPools::Pool.new('default', [ActiveRecord::Base]) end super pools end
Private Instance Methods
config_hash()
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# File lib/replica_pools/pools.rb, line 36 def config_hash if ActiveRecord::VERSION::MAJOR >= 6 # in Rails >= 6, `configurations` is an instance of ActiveRecord::DatabaseConfigurations ActiveRecord::Base.configurations.to_h else # in Rails < 6, it's just a hash ActiveRecord::Base.configurations end end
connection_class(pool_name, replica_name, connection_name)
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generates a unique ActiveRecord::Base subclass for a single replica
# File lib/replica_pools/pools.rb, line 47 def connection_class(pool_name, replica_name, connection_name) class_name = "#{pool_name.camelize}#{replica_name.camelize}" ReplicaPools.module_eval %Q{ class #{class_name} < ActiveRecord::Base self.abstract_class = true establish_connection :#{connection_name} def self.connection_config configurations[#{connection_name.to_s.inspect}] end end }, __FILE__, __LINE__ ReplicaPools.const_get(class_name) end
pool_configurations()
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finds valid pool configs
# File lib/replica_pools/pools.rb, line 29 def pool_configurations config_hash.map do |name, config| next unless name.to_s =~ /#{ReplicaPools.config.environment}_pool_(.*)_name_(.*)/ [name, $1, $2] end.compact end