require 'rubygems'
require 'sequel'
require 'fileutils'
require 'logger'

db_file = '/tmp/delete_me.sqlite'
FileUtils.rm( db_file ) if File.exists?( db_file )
DB = Sequel.sqlite( db_file )

logger = Logger.new( "/tmp/threaded_test.log" )
DB.loggers << logger

DB.create_table :things do
  primary_key :id
  Integer :n
  Time :created_at
end

class Thing < Sequel::Model
  plugin :timestamps
end

N = 25

things = (0..N).map do |n|
  Thing.create( :n => n )
end

threads = [0,1].map do |i|
  Thread.new do
    i.step(N, 2) do |j|
      thing = things[j]
      thing.n += 1
      thing.save
    end
  end
end

threads.each {|t| t.join }