def __init__(self):
self.interval = _server_conf[_eviron]['INTERVAL']
self.starthour = _server_conf[_eviron]['START_HOUR']
self.host = _server_conf[_eviron]['HOST']
self.port = _server_conf[_eviron]['PORT']
self.jobmanager = JobManager(self)
self.lock_spawn = threading.Lock()
self.next_batch_start_time = None
self.socketserver = SocketServer(self.host, self.port, self.jobmanager)
class Server(object):
'''
Daemon serves as schedule engine
'''
clocks = []
def __init__(self):
self.interval = _server_conf[_eviron]['INTERVAL']
self.starthour = _server_conf[_eviron]['START_HOUR']
self.host = _server_conf[_eviron]['HOST']
self.port = _server_conf[_eviron]['PORT']
self.jobmanager = JobManager(self)
self.lock_spawn = threading.Lock()
self.next_batch_start_time = None
self.socketserver = SocketServer(self.host, self.port, self.jobmanager)
def _fillClock(self, starthour, interval):
'''
Fill clock triggers
Server use clocks as triggers to schedule next batch of tasks.
This clock values should be stable every day ,so interval causes variable
clocks is not accepted.
@param starthour:Integer as start hour
@param interval:Integer as interval hours to generate clock triggers
'''
self.clocks = []
if (24 % interval != 0):
raise ValueError("Invalid Interval %d" % (interval))
else:
for i in range(0, 24, interval):
self.clocks.append((i + starthour) % 24)
self.clocks.sort()
def _spawnScheduleThread(self, next_batch_start_time):
'''
Spawn schedule thread after one batch of task threads have been spawned
Execute Time of the schedule thread is subtraction of next_batch_start_time
and AHEAD_MINUTES of configuration.If execute time is gone,the thread will
be started at once.
@param next_batch_start_time: datetime,start time of next batch
'''
next_schedule_time = next_batch_start_time - timedelta(minutes=_server_conf[_eviron]['AHEAD_MINUTES'])
delay = 0 if next_schedule_time <= datetime.now() else (next_schedule_time - datetime.now()).seconds + 1
next_batch_end_time = next_batch_start_time + timedelta(hours=self.interval)
schedule_thread = threading.Timer(delay,
self._spawnTaskThreads,
args=[next_batch_start_time, next_batch_end_time ],
kwargs={})
schedule_thread.daemon = True
schedule_thread.start()
logger.info("Schedule Thread for %s to %s has been created." % (next_batch_start_time.strftime("%Y-%m-%d %H:%M:%S"),
next_batch_end_time.strftime("%Y-%m-%d %H:%M:%S")))
def spawnTaskThread(self, jobid):
'''
Spawn task threads of one job
@param jobid:int job id to spawn
'''
self.lock_spawn.acquire()
try:
now = datetime.now()
self.jobmanager.spawnTask(jobid, now, self.next_batch_start_time)
self.lock_spawn.release()
except Exception, e:
self.lock_spawn.release()
raise e;
logger.info("TaskThreads of Job(id:%d) have been spawned from %s to %s." % (jobid,
now.strftime("%Y-%m-%d %H:%M:%S"),
self.next_batch_start_time.strftime("%Y-%m-%d %H:%M:%S")))
