import threading
import time

class Expirer(threading.Thread):
    def __init__(self, entries, eventLifeTime, nullAddress):
        threading.Thread.__init__(self)
        self.entries = entries
        self.eventLifeTime = eventLifeTime
        self.nullAddress = nullAddress
        self.setDaemon(True)

    def run(self):
        while True:
            print "Expiring ..."
            currentTime = int(time.time())
            for entry in  self.entries.values():
                print "Checking ", str(entry)
                if entry.lastEventTime != 0 and entry.lastEventTime + self.eventLifeTime < currentTime:
                    print "Entry %s expired" % entry.dynid
                    entry.lastEventTime = 0
                    entry.address = self.nullAddress
                    print "Set in DNS: %s -> %s" % (entry.name, entry.address)
            time.sleep(10)