dramatis

#!/usr/bin/env python

# cf. Scala by Example, Chapter 3

import inspect

import sys

import os.path

import time

sys.path[0:0] = [ os.path.join( os.path.dirname( inspect.getabsfile( inspect.currentframe() ) ), '..', '..', 'lib' ) ]

from logging import warning

import dramatis

class PingPong ( dramatis.Actor ):

    def __init__(self,name):

        self._name = name

    def pingpong(self,count,partner):

        if count == 0:

            print "%s: done" % self._name

        else:

            if count % 500 == 0 or count % 500 == 1:

                print "%s: pingpong %d" % ( self._name, count )

            dramatis.release( partner ).pingpong( count-1, self )

            time.sleep( 0.001 )

ping = PingPong( "ping" )

pong = PingPong( "pong" )

ping.pingpong( int(sys.argv[1]), pong )