Eventmachine talk - May 2006 - Storing connections in your program (reply to

The EventMachine echo-server shows a module that you supply to handle
events. But you can also use a class. If you do so, then you have more
flexibility to add other functionality to the connection objects that
EventMachine generates when it accepts network connections.

For example, if you wanted an array of currently-open connections, try this:

require ''rubygems''
require ''eventmachine''

class Echo < EventMachine::Connection

  @@conn_list = []

  def self.print_connections
    p @@conn_list
  end

  def initialize *args
    super
    @@conn_list << self
  end

  def post_init
    # your normal processing
  end
  def receive_data data
    # your normal processing
  end
  def unbind
    @@conn_list.delete self
  end

end

EventMachine.run {
  EventMachine.start_server "192.168.xx.yy", 8100, Echo
  EventMachine.add_periodic_timer(5) {Echo.print_connections}
}