Python WorkQueue.shutdown_workers方法代码示例

# 需要导入模块: from work_queue import WorkQueue [as 别名]
# 或者: from work_queue.WorkQueue import shutdown_workers [as 别名]
class QMaster(threading.Thread):
    def __init__(self, project, port, log_freq=600): # 600 seconds
        """Initialize the QMaster
        
        Parameters
        ----------
        project : 
        port : int
        log_freq : int, optional
            frequency to print info about the status of the work queue.
            In units of seconds. Default is to print every 10 minutes.
        """
        
        threading.Thread.__init__(self)
        self.project = project
        
        self.log_freq = log_freq  # print time in seconds
        self.wake_freq = 1 # seconds
        
        self.wq = WorkQueue(port, name='MSMAccelerator', catalog=True, exclusive=False)

        logger.info('WORK QUEUE MASTER LISTENING ON PORT: %d', self.wq.port)
        logger.info('(Start a local worker with >> work_queue_worker -d all localhost %d & )', self.wq.port)
        
        # method controls whether or not we need to bring back solvated_xtc as well
        if self.project.method == 'explicit':
            self.return_wet_xtc = True
        elif self.project.method == 'implicit':
            self.return_wet_xtc = False
        else:
            raise Exception("project.method must be 'explicit' or 'implicit'")
        logger.info('Return wet xtc set to %s', self.return_wet_xtc)
        
        # what does this specify algorithm do?
        self.wq.specify_algorithm(WORK_QUEUE_SCHEDULE_FCFS)
        
        # fast abort kills jobs that appear to be stragling (taking more than 1.5x average)
        #self.wq.activate_fast_abort(1.5)
        
        # setting the stop event signals for the thread to die
        self._stop = threading.Event()
        
        # the thread sets the  event every time a job returns or there are no waiting jobs
        # and it finished post processing. See the wait method
        self._mainloop_wake_event_cause = None
        self._mainloop_wake_event = threading.Event()
        
        # start the thread
        self.start()
    
    def run(self):
        """Main thread-loop for the QMaster thread"""
        last_print = time.time()
        
        while True:
            time.sleep(self.wake_freq)
            
            if not self.wq.empty():
                t = self.wq.wait(self.wake_freq)
                if t:
                    if t.return_status != 0:
                        logger.error('Worker returned nonzero exit status for job: %d', t.return_status)
                    else:
                        self.on_return(t)
                    self._mainloop_wake_event_cause = 'job returned'
                    self._mainloop_wake_event.set()
            
            if self.wq.stats.tasks_waiting == 0 and not self._mainloop_wake_event.is_set():
                self._mainloop_wake_event_cause = 'queue empty'
                self._mainloop_wake_event.set() # also set the event if there are no tasks in the queue

            if self._stop.is_set():
                logger.info('Recieved stop signal. Shutting down all workers')
                self.wq.shutdown_workers(0) # 0 indicates to shut all of them down
                sys.exit(0)
            
            if time.time() - last_print > self.log_freq:
                logger.info('workers initialized: %d, ready: %d, busy: %d', self.wq.stats.workers_init, self.wq.stats.workers_ready, self.wq.stats.workers_busy)
                logger.info('workers running: %d, waiting: %d, complete: %d', self.wq.stats.tasks_running, self.wq.stats.tasks_waiting, self.wq.stats.tasks_complete)
                last_print = time.time()

    def num_jobs_waiting(self):
        """Number of jobs waiting to be sent out
        
        This number should be kept at 1, and when it drops to zero a new job
        should be generated.
        
        Returns
        -------
        n : int
            The number
        """
        return self.wq.stats.tasks_waiting

    def num_jobs_in_queue(self):
        """Get the number of jobs currently in the work queue
        
        This includes both the jobs running remotely and the ones waiting
        here
        
#.........这里部分代码省略.........

# 需要导入模块: from work_queue import WorkQueue [as 别名]
# 或者: from work_queue.WorkQueue import shutdown_workers [as 别名]
for i in range(5):
    task = Task('hostname && date +%s.%N')
    task.specify_input_file('/bin/hostname')
    wq.submit(task)

if wq.hungry():
    print 'work queue is hungry'

wq.activate_fast_abort(1.5)

while not wq.empty():
    t = wq.wait(1)
    if t:
	print t.id, t.return_status, t.result, t.host
	print t.preferred_host, t.status
	print t.submit_time, t.start_time, t.finish_time
	print t.transfer_start_time, t.computation_time
	print t.total_bytes_transferred, t.total_transfer_time
	print t.output
    
    print wq.stats.workers_init, wq.stats.workers_ready, wq.stats.workers_busy, \
	  wq.stats.tasks_running, wq.stats.tasks_waiting, wq.stats.tasks_complete

wq.shutdown_workers(0)

print wq.stats.total_tasks_dispatched, wq.stats.total_tasks_complete, \
      wq.stats.total_workers_joined, wq.stats.total_workers_removed

# vim: sts=4 sw=4 ts=8 ft=python