gevent.pool (고정 크기)은 여러 작업 생성자간에 공유됩니다. 모든 작업 생성자는 여유 슬롯이있는 경우 풀에 새 녹색let을 적용 할 수 있습니다. 작업이 풀에 추가 된 후 작업 생성자는 추가 된 모든 작업이 완료 될 때까지 대기해야합니다.Gevent : 완료된 greenlets 집합을 기다리는 방법
gevent.queue.JoinableQueue를 사용하여 모든 작업이 완료 될 때까지 기다렸습니다. 그것은 내가 기다리는 끝에 매우 성가신 예외를 받는다는 것을 제외하면 작동합니다.
어떻게 피하면 아래 코드를 수정할 수 있습니까? 내가 뭔가 잘못했을 수 있습니까?
from gevent import monkey, sleep; monkey.patch_all()
from gevent.queue import JoinableQueue
from gevent.pool import Pool
pool = Pool(3)
def worker(n):
print 'Worker {} started'.format(n)
sleep(1)
print 'Worker {} finished'.format(n)
return n
def main():
results = []
queue = JoinableQueue()
for job_no in range(5):
pool.wait_available()
greenlet = pool.apply_async(worker, kwds=dict(n=job_no), callback=lambda ret: results.append(ret))
queue.put(greenlet)
sleep(.05)
print 'All workers added'
queue.join()
print 'All workers finished', results
if __name__ == '__main__':
main()
출력 :
Worker 0 started
Worker 1 started
Worker 2 started
Worker 0 finished
Worker 3 started
Worker 1 finished
Worker 4 started
All workers added
Worker 2 finished
Worker 3 finished
Worker 4 finished
Traceback (most recent call last):
File "main.py", line 32, in <module>
main()
File "main.py", line 27, in main
queue.join()
File "C:\Python\2.7.10\x64\lib\site-packages\gevent\queue.py", line 492, in join
return self._cond.wait(timeout=timeout)
File "C:\Python\2.7.10\x64\lib\site-packages\gevent\event.py", line 219, in wait
return self._wait(timeout)
File "C:\Python\2.7.10\x64\lib\site-packages\gevent\event.py", line 129, in _wait
gotit = self._wait_core(timeout)
File "C:\Python\2.7.10\x64\lib\site-packages\gevent\event.py", line 106, in _wait_core
result = self.hub.switch()
File "C:\Python\2.7.10\x64\lib\site-packages\gevent\hub.py", line 630, in switch
return RawGreenlet.switch(self)
gevent.hub.LoopExit: ('This operation would block forever', <Hub at 0x26c1c28 select default pending=0 ref=0>)