development.rb

config.after_initialize do
  puts "[RAILS] Rails loaded successfully!"  
  unless Object.const_defined?(:IRB) || Object.const_defined?(:MY_DAEMON_CTL_STARTED) || Object.const_defined?(:MY_OTHER_DAEMON_CTL_STARTED) RAILS_ENV == 'test'
    puts "[RAILS] Starting daemons..."
    
    begin
      MyDaemonController.instance.start
    rescue ::DaemonController::AlreadyStarted => das
      puts "MyDaemon already started..."
    end
    
    begin
      MyOtherDaemonController.instance.start 
    rescue ::DaemonController::AlreadyStarted => das
      puts "MyOtherDaemon already started..."
    end  
  end
  
  at_exit do
    puts "[RAILS] Rails exiting...Trace: #{caller.join("\n")}"
    # Don't stop daemons if in irb or test environment or daemon controller (based on daemons gem) exited
    unless Object.const_defined?(:IRB) || RAILS_ENV == 'test' || (caller.first && caller.first.grep(/daemons\/cmdline\.rb/))
      puts "[RAILS] Stopping daemons..."
      begin
        puts "[RAILS] Stopping MyDaemon..."
        MyDaemonController.instance.stop
      rescue Exception => e
        puts "Exception stopping MyDaemon: #{e.message} Trace: #{e.backtrace.join("\n")}"
      end
    
      begin
        puts "[RAILS] Stopping MyOtherDaemon..."        
        MyOtherDaemonController.instance.stop
      rescue Exception => e
        puts "Exception stopping MyOtherDaemon: #{e.message} Trace: #{e.backtrace.join("\n")}"
      end    
    end
  end
  
  trap("INT") { puts "[RAILS] INT signal received." }
  
end

my_daemon_controller.rb

require 'daemon_controller'
require 'singleton'

class MyDaemonController
  include Singleton
  MY_DAEMON_PORT = 40000
  
   attr_reader :controller
   
   def initialize
      @controller = DaemonController.new(
         :identifier => 'MyDaemon server',
         :start_command => "#{RAILS_ROOT}/script/my_daemon_ctl start",
         :before_start => method(:before_start),
         :ping_command => lambda { TCPSocket.new('localhost', MY_DAEMON_PORT) },
         :pid_file => "#{RAILS_ROOT}/tmp/pids/my_daemon_#{RAILS_ENV}.pid",
         :log_file => "#{RAILS_ROOT}/log/my_daemon_#{RAILS_ENV}.log")
   end
   
   def start
     controller.start
   end
   
   def stop
     controller.stop
   end
   
   private
   
    def before_start
      puts "daemon_controller starting my_daemon..."
    end

end