It's still not clear why the scheduler does not fit your needs. Anyway what you want seems to need should be a *deamon*. You can launch it in the middle of the request/response cycle or from the scheduler it will detach from the parent (the launching) process and work in the background.
pip install python-daemon http://pypi.python.org/pypi/python-daemon/ mic 2012/11/7 Richard Baron Penman <richar...@gmail.com> > OK, got a solution that has been working well for last few days now. > > I made 2 mistakes previously that caused me trouble: > > 1) The child processes are independent. I had used ctrl+c to kill > web2py, which was passed on to the child processes. > When kill -9 [web2py PID] was used the child processes continued fine. > > 2) The parent process can kill child processes but they became zombie > processes until the parent process dies. > Originally I was checking /proc/PID for process existence so seemed to > always exist. Now using the psutil package, which has some useful > cross platform features. Much better than parsing output of ps! > > > The scheduler was not helpful for this use case. > > Here are some functions I used in case they help others: > > > def exists(pid): > """Return whether the process exists""" > try: > p = psutil.Process(pid) > if p.status == psutil.STATUS_ZOMBIE: > return False # ignore zombie processes > else: > return True > except psutil.NoSuchProcess: > return False > > > def stop(pid): > """Try to kill this process, first with interrupt and then kill signal > """ > success = True > try: > p = psutil.Process(pid) > p.terminate() > time.sleep(1) # if don't delay here a bit then exists() call > will usually fail - better way? > if exists(pid): > # was not able to terminate process so try kill > p.kill() > time.sleep(1) > if exists(pid): > success = False > except psutil.NoSuchProcess: > pass > return success > > -- > > > > --
