0_gevent_spawn.md

gevent spawn出來的task，可以用以下三個decorate來綁定, task做完後的callback

glet = gevent.spawn(task, ...)


@glet.link
def on_finish(glet):
  pass
  
  
@glet.link_value
def on_success(glet):
  pass
  
  
@glet.link_exception
def on_exception(glet):
  pass
  

test-gevent-spawn.py

import gevent
import random


def task(name):
    for i in range(0, 5):
        gevent.sleep(0.1)
        print("%s is sleepping ... %s" % (name, i))
        if random.randint(0, 10) >= 11:
            print(10/0)
    print("done")
    return True, "success"


glet = gevent.spawn(task, name="Bill")

@glet.link
def on_finish(glet, *args, **kw):
    print("on_finish, %s, %s, %s" % (glet, args, kw))


@glet.link_value
def on_success(glet, *args, **kw):
    print("on_success, %s, %s, %s" % (glet, args, kw))
    print(dir(glet))
    print(glet.value) # result


@glet.link_exception
def on_exception(glet, *args, **kw):
    print("on_exception, %s, %s, %s" % (glet, args, kw))
    print(glet.exception) # exception

gevent.sleep(2)