import threading
import Util
import os
import traceback
import sys
import time

class JobsStateUpdater( threading.Thread ):
	DELAY_BETWEEN_STATUS_CHECKS=10 # in seconds
	def __init__( self, clusterStatus ):
		threading.Thread.__init__(self)
		self.m_clusterStatus = clusterStatus
		self.m_bStop = False		
		
	def getName( self ):
		return 'JobsStateUpdater'
	
	def getGridEngine( self ):
		return self.m_clusterStatus.getGridEngine()
	
	def updateClusterStatus( self ):
		#log('JobsStateUpdater::updateClusterStatus : start')

		jobsState = self.getGridEngine().getCurrentJobsState()
		# update the jobs in the cluster status
		self.m_clusterStatus.onNewJobsState( jobsState )
		#log('JobsStateUpdater::updateClusterStatus : end')
		
	def run( self ):
		try:
			while not self.m_bStop :
				self.updateClusterStatus()
				time.sleep(JobsStateUpdater.DELAY_BETWEEN_STATUS_CHECKS)
		except BaseException, exception: # catches all exceptions, including the ctrl+C (KeyboardInterrupt)
			Util.onException(exception)