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<p class=MsoNormal>I am currently working on writing an application using the
twisted framework. The problem that I have is that I do not want to use twistd.
In fact, I find twistd to be inappropriate as it defaults pidfile and logfile to
something specific to twisted, not my application, and it seem completely silly
to have to pass in –pidfile and –logfile params when stating it up.
Those parameters should be specified as part of the Application object itself,
and should allow for CLI override. Further, as I want my daemon that I’m
writing to look and act like a daemon (UNIX), I do not want to be invoking some
general “twistd” command and passing a ton of options. Ideally, I
should be able to write a Pythons script that acts like twistd, but can bake in
default options and hide/expose other ServerOptions as I so see fit.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>For example, if I run, <o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>my_daemon<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>It should fire up the daemon<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>my_daemon –help<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>should dump the help<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>my_daemon –pidfile=/var/run/my_daemon.pid<o:p></o:p></p>
<p class=MsoNormal>my_daemon stop<o:p></o:p></p>
<p class=MsoNormal>my_daemon restart<o:p></o:p></p>
<p class=MsoNormal> <o:p></o:p></p>
<p class=MsoNormal>should all function accordingly. I want to avoid all of this
“twistd –y” business, as the daemon, isn’t “twistd”
it’s my code. I should be able to use the ApplicationRunner,
UnixApplicationRunner, etc “runners”, however, as they are
currently written, they are twistd specific. For example, in 8.2, the def
checkPid function bakes in, “
sys.exit("""\<o:p></o:p></p>
<p class=MsoNormal>Another twistd server is running, PID %s\n<o:p></o:p></p>
<p class=MsoNormal>This could either be a previously started instance of your
application or a<o:p></o:p></p>
<p class=MsoNormal>different application entirely. To start a new one, either
run it in some other<o:p></o:p></p>
<p class=MsoNormal>directory, or use the --pidfile and --logfile parameters to
avoid clashes.<o:p></o:p></p>
<p class=MsoNormal>""" % pid)”<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Which is iditic as my application may not even expose a –pidfile
or a –logfile and it’s definatley not called twistd. The platform
specific application runners need to be more generalized so users can write their
own twistd equivalent to include only what they want.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Perhaps I’m missing some key point of twisted that
already does this. If so, I’d love to be guided in the right direction.
If not, and I’ve got a valid point here, I’d love to know how I can
help to remedy this problem. I think it’s great that twistd provides application
management classes, but they are unnecessarily intertwined with twistd which
should be completely optional.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>-Jared<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
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