A way for closing an app monitor

[Daniel Crespo]

Hello,

I'm in the way for creating an application and its monitor. Yes, there
are 2 applications: The main app, and a monitor. The last one monitors
the main application for keeping it alive, and viceversa. But if I
close the main app, I want to close the monitor.

That is very easy under nt systems, but in 98 is a little more tricky
because of the problem with closing processes.

For example, I can't use the following code on a win98 machine:

def FindPID(exename):
"""
usage:
pid=FindPID("pythonw.exe")
print pid
"""
a = os.popen4('tasklist /FI "IMAGENAME eq '+exename+'"')
a[0].flush()
try:
info=a[1].readlines()[3].split()
except:
info=[exename,"NotFound"]
return info[1] #PID

because the "tasklist" command doesn't exist on win98. Also, I tried to
install the kill.exe and a dont-remember-dll (from the Win98 Resource
Kit), but it doesn't work.

So my solution (need help on this) is that I have been thinking on
letting the monitor listen for socket connection. Through this, the
main app can tell him to close when the main app closes correctly. Do
you think this is well thought? Any suggestions?

Daniel

 

[elbertlev]

//So my solution (need help on this) is that I have been thinking on
letting the monitor listen for socket connection. Through this, the
main app can tell him to close when the main app closes correctly. Do
you think this is well thought? Any suggestions?

This is the only solution you have to consider. If monitor and main
app. run on the same machine - does not matter, But when they run on
different machines and maybe in different domains... One more hint:
make monitor a listener (server), namely HTTP server. In this case you
will not have problems with proxyes/firewalls etc.

 

[Daniel Crespo]

Ok. Thanks for your answer

I have implemented this and works correctly.

Daniel