from Policy import Policy

class fcfs(Policy) :
    def __init__(self):
        pass;

    def configure(self):
        print 'No options to configure for fcfs'

    def is_preemptive(self):
        return False

    def get_time_slice(self):
        return -1

    def sort_queue(self, event, queue):
        print 'Entering sort_queue'
        print queue.size()
        print dir(queue.get_item_at(0))
        for i in range(0, queue.size()):
            ss = queue.get_item_at(i)
            print ss.get_schedulable().get_name()
        cmpf = lambda a, b: \
            a.get_schedulable().get_arrival_time() < \
            b.get_schedulable().get_arrival_time()
        try:
            self.sort(queue,cmpf)
        except:
            print "Unexpected error:", sys.exc_info()[0]
            raise
        for i in range(0, queue.size()):
            ss = queue.get_item_at(i)
            print ss.get_schedulable().get_name()