[英]Eventlet and Python daemon, Foo not called?
I am trying to build a Python deamon which listen to a queue (Redis Kombu).我正在尝试构建一个监听队列(Redis Kombu)的 Python 守护进程。 Grab the task and spawn a greenthread to process this task.
抓取任务并生成一个绿色线程来处理此任务。
I can receive the task and consume it without trouble but when I try to spawn a GreenThread with eventlet it does not seem to be doing anything at all.我可以毫无问题地接收任务并使用它,但是当我尝试使用 eventlet 生成 GreenThread 时,它似乎根本没有做任何事情。
No print, no logging is shown.不打印,不显示日志记录。
class agent(Daemon):
"""
Agent
"""
def run(self):
# Setup connection
mainLogger.debug('Connecting to Redis')
connection = BrokerConnection(
hostname=agentConfig['redis_host'],
transport="redis",
virtual_host=agentConfig['redis_db'],
port=int(agentConfig['redis_port']))
connection.connect()
# Create an eventlet pool of size 5
pool = eventlet.GreenPool(5)
q = connection.SimpleQueue("myq")
while True:
try:
message = q.get(block=True, timeout=1)
print "GOT A MESSAGE FROM Q !"
pool.spawn_n(self.foo, 'x')
print "END SPAWN !"
except Empty:
mainLogger.debug('No tasks, going to sleep')
time.sleep(1)
def foo(self, x):
mainLogger.debug('\o/')
print "HELLO FROM SPAWN"
Anything I am doing wrong?有什么我做错了吗?
I needed to call eventlet.monkey_patch() for sleep() call to trigger context switching.我需要调用 eventlet.monkey_patch() 来调用 sleep() 来触发上下文切换。
You just need to use eventlet.sleep
as described here:您只需要使用
eventlet.sleep
,如下所述:
http://eventlet.net/doc/basic_usage.html#eventlet.sleep http://eventlet.net/doc/basic_usage.html#eventlet.sleep
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