import threading
import time
from observer.event_loop import XOSObserver
from observer.event_manager import EventListener
from util.logger import Logger, logging
from model_policy import run_policy
from xos.config import Config

logger = Logger(level=logging.INFO)

class Backend:
    
    def run(self):
            # start the openstack observer
            observer = XOSObserver()
            observer_thread = threading.Thread(target=observer.run)
            observer_thread.start()
            
            # start model policies thread
            observer_name = getattr(Config(), "observer_name", "")
     	    if (not observer_name):	
             	model_policy_thread = threading.Thread(target=run_policy)
             	model_policy_thread.start()
     	    else:
         		print "Skipping model policies thread for service observer."

            model_policy_thread = threading.Thread(target=run_policy)
            model_policy_thread.start()

            # start event listene
            event_manager = EventListener(wake_up=observer.wake_up)
            event_manager_thread = threading.Thread(target=event_manager.run)
            event_manager_thread.start()