2
다음 목표를 달성하는 가장 효율적인 방법은 무엇입니까 : 주 프로세스는 이벤트를 수집 및 배포 (이벤트 루프 run_forever) 하위 프로세스. 이 서브 프로세스들은 살아남아 외부 세계로부터 신호를 수집하거나 신호를 소비하고 CPU 바인딩 작업을 수행합니다. 나는 위가 충분히 우아한/효율적인 아니라고 느낌이와 내가 뭔가를 누락 그러나파이썬 asyncio 영원히 실행 및 프로세스 간 통신
import os
import time
import signal
import asyncio
from asyncio import PriorityQueue
from multiprocessing import Process, Pipe
class Event(object):
__slots__ = ['type','priority','payload','timestamp']
def __init__(self, _type = None, _priority = None, _payload = None):
self.type, self.priority, self.payload, self.timestamp = _type, _priority, _payload, time.time()
def __str__(self):
return "%s(%s,%s,%s)" % (self.__class__.__name__, self.type, self.priority, self.payload)
def __lt__(self, other):
return (self.priority, self.timestamp) > (other.priority, other.timestamp)
class EventQueue(PriorityQueue):
def _put(self, event):
super()._put((event.priority, event))
@asyncio.coroutine
def consumeAnyEvent(eq, acon_write_p = None): ## more args with write_conn pipes
while True:
priority, event = yield from eq.get()
print("consumed",event)
if event.type == 'sig_a':
acon_write_p.send(event)
if event.type == 'sig_b':
pass
if event.type == 'sig_c':
pass
## and so on - broadcast events to relevant sub-processes
yield from asyncio.sleep(0)
@asyncio.coroutine
def produceSignalA(eq,read_p):
while True:
yield from asyncio.sleep(0)
row = read_p.recv()
if row:
yield from eq.put(Event('sig_a', payload = row))
class someSource(object):
"""db, http, file watch or other io"""
def fetch(self):
pass
def someSlowMethod(a=None):
"""cpu-bound operations"""
pass
def signalAPublisher(pipe):
read_p, write_p = pipe
read_p.close()
s = someSource()
while True:
result = s.fetch()
if result:
write_p.send(result)
def signalAConsumer(pipe):
read_p, write_p = pipe
while True:
inp = read_p.recv()
if inp:
result = someSlowMethod(inp)
write_p.send(result)
def main():
## main process is responsible for handling events:
## colllecting from all signal publisher subprocessses
## and broadcasting to all interested consumer subprocesses
eventQueue = EventQueue()
apub_read_p, apub_write_p = Pipe()
acon_read_p, acon_write_p = Pipe()
## more pipes for Signal B, ... Signal Z
signalAPublisher_p = Process(target=signalAPublisher, args=((apub_read_p, apub_write_p),))
signalAConsumer_p = Process(target=signalAPublisher, args=((acon_read_p, acon_write_p),))
signalAPublisher_p.start()
signalAConsumer_p.start()
## and so on for Signal B, Signal C, ... Signal Z
loop = asyncio.get_event_loop()
try:
tasks = asyncio.gather(
loop.create_task(produceSignalA(eventQueue,apub_read_p)),
loop.create_task(consumeAnyEvent(eventQueue,acon_write_p))
)
loop.run_forever()
except KeyboardInterrupt:
print("Caught keyboard interrupt. Canceling tasks...")
tasks.cancel()
finally:
loop.close()
os.kill(signalAPublisher_p.pid, signal.SIGTERM)
os.kill(signalAConsumer_p.pid, signal.SIGTERM)
## kill for Signal B, ... Signal Z
if __name__ == '__main__':
main()
: 지금까지, 나는 이런 식으로 뭔가를 내놓았다. 어떤 아이디어, 제안?
http://zeromq.org/ –
@PadraicCunningham의 통찰력에 감사드립니다 - 공부하러갔습니다! 파이썬에 통합하는 것이 얼마나 고통 스럽습니까? 이상적으로 표준 파이썬 라이브러리를 넘어서고 싶지 않습니다. – Nicholas