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# encoding: utf-8
# AR adapter for using a fibered mysql2 connection with EM
# This adapter should be used within Thin or Unicorn with the rack-fiber_pool middleware.
# Just update your database.yml's adapter to be 'em_mysql2'
# to real connection pool size.
require 'em-synchrony/mysql2'
require 'em-synchrony/activerecord'
require 'active_record/connection_adapters/mysql2_adapter'
module ActiveRecord
class Base
def self.em_mysql2_connection(config)
client = EM::Synchrony::ActiveRecord::ConnectionPool.new(size: config[:pool]) do
conn = ActiveRecord::ConnectionAdapters::EMMysql2Adapter::Client.new(config.symbolize_keys)
# From Mysql2Adapter#configure_connection
conn.query_options.merge!(:as => :array)
# By default, MySQL 'where id is null' selects the last inserted id.
# Turn this off. http://dev.rubyonrails.org/ticket/6778
variable_assignments = ['SQL_AUTO_IS_NULL=0']
encoding = config[:encoding]
variable_assignments << "NAMES '#{encoding}'" if encoding
wait_timeout = config[:wait_timeout]
wait_timeout = 2592000 unless wait_timeout.is_a?(Fixnum)
variable_assignments << "@@wait_timeout = #{wait_timeout}"
conn.query("SET #{variable_assignments.join(', ')}")
conn
end
options = [config[:host], config[:username], config[:password], config[:database], config[:port], config[:socket], 0]
ActiveRecord::ConnectionAdapters::EMMysql2Adapter.new(client, logger, options, config)
end
end
module ConnectionAdapters
class EMMysql2Adapter < ::ActiveRecord::ConnectionAdapters::Mysql2Adapter
class Client < Mysql2::EM::Client
include EM::Synchrony::ActiveRecord::Client
end
if ::ActiveRecord.version >= Gem::Version.new('4.2')
require 'em-synchrony/activerecord_4_2'
include EM::Synchrony::ActiveRecord::Adapter_4_2
else
include EM::Synchrony::ActiveRecord::Adapter
end
end
end
end
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