Created
November 1, 2011 14:21
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em_mysql2
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gem 'activerecord', '3.1.1' | |
gem 'mysql2', '~> 0.3.0' | |
gem 'em-synchrony', '1.0.0' | |
require 'logger' | |
require 'fiber' | |
require 'active_record' | |
require 'mysql2' | |
require 'eventmachine' | |
require 'em-synchrony' | |
require 'em-synchrony/activerecord' | |
ActiveRecord::Base.logger = Logger.new($stdout) | |
ActiveRecord::Base.establish_connection( | |
:adapter => 'em_mysql2', | |
:database => "test", | |
:username => "root", | |
:pool => 1 | |
) | |
def log(msg) | |
t = Time.now.strftime("%H:%M:%S") | |
puts("[#{t}] #{msg}") | |
end | |
def get_time | |
Time.now.to_f * 1000 | |
end | |
def do_job | |
log "[#{'%x' % Fiber.current.object_id}] Waiting" | |
started_at = get_time() | |
ActiveRecord::Base.connection_pool.with_connection do |conn| | |
working_at = get_time() | |
log "[#{'%x' % Fiber.current.object_id}] Working with (#{'%x' % conn.object_id})" | |
ActiveRecord::Base.connection.execute("SELECT SLEEP(1)") | |
now = get_time() | |
log "[#{'%x' % Fiber.current.object_id}] Done (wait: #{(working_at - started_at).to_i}ms, execution: #{(now - working_at).to_i}ms)" | |
end | |
end | |
DELAY = 0 | |
EM::run do | |
5.times do |n| | |
EM::add_timer(n * DELAY) do | |
Fiber.new{ do_job() }.resume | |
end | |
end | |
end |
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