def __init__(self, sender_queue):
"""Constructor.
Args:
sender_queue: Queue.Queue
"""
self._sender_queue = sender_queue
self.nanny_controller = client_utils.NannyController()
def SyncTransactionLog(self):
"""This flushes the transaction log.
This function should be called by the client before performing
potential dangerous actions so the server can get notified in case
the whole machine crashes.
"""
if self.nanny_controller is None:
self.nanny_controller = client_utils.NannyController()
self.nanny_controller.SyncTransactionLog()
def Progress(self):
"""Indicate progress of the client action.
This function should be called periodically during client actions that do
not finish instantly. It will notify the nanny that the action is not stuck
and avoid the timeout and it will also check if the action has reached its
cpu limit.
Raises:
CPUExceededError: CPU limit exceeded.
"""
now = time.time()
if now - self.last_progress_time <= 2:
return
self.last_progress_time = now
# Prevent the machine from sleeping while the action is running.
client_utils.KeepAlive()
if self.nanny_controller is None:
self.nanny_controller = client_utils.NannyController()
self.nanny_controller.Heartbeat()
user_start = self.cpu_start.user
system_start = self.cpu_start.system
cpu_times = self.proc.cpu_times()
user_end = cpu_times.user
system_end = cpu_times.system
used_cpu = user_end - user_start + system_end - system_start
if used_cpu > self.cpu_limit:
self.grr_worker.SendClientAlert("Cpu limit exceeded.")
raise CPUExceededError("Action exceeded cpu limit.")
def StartNanny(self):
# Deliberatley no call to StartNanny()
self.nanny_controller = client_utils.NannyController()
def StartNanny(self): # Use this to control the nanny transaction log. self.nanny_controller = client_utils.NannyController() self.nanny_controller.StartNanny()