'Constructor.'

def __init__(self, ca_cert=None, private_key=None, fast_poll=False):

    super(PoolGRRClient, self).__init__()
    self.private_key = private_key
    self.daemon = True
    self.client = comms.GRRHTTPClient(ca_cert=ca_cert, private_key=private_key)
    if fast_poll:
        self.client.timer.FastPoll()
    self.stop = False
    self.enrolled = False
