Hi,
I'm writing a webapplication with tntnet for which I need one extra thread
running in the background. Unfortunately, the documentation does not have a
lot to say about this sort of thing.
Can I just use the pthreads API to create a new thread, like one would usually
do in a standalone app, or will that cause some unintended, strange
side-effects? Is there maybe a tntnet specific way to create and deal with
extra threads (unrelated to serving http-content).
Protecting access to shared variables is not an issue in this case. The thread
has a single incoming message queue and will never have to access any
variables belonging to other threads.
Graceful shutdown/restart however is an issue. This thread needs to run for
the entire time the webapp is up and will need to do some cleanup before
shutdown. I will need tntnet to somehow signal this thread about an imminent
shutdown and then wait for it to finish.
Background:
I'm trying to program a simple browsergame as a basis for experimenting with
the "everything-in-memory" web development approach.
The idea is simple:
The web application has no database or filestore, it simply stores its entire
state in one big global object (which employs the usual methods to avoid
problems with concurrent accesses).
All changes, additions and deletions to any of the objects managed by the
applications are sent to a dedicated logging thread which will write them to
disk asynchronically.
When the application restarts, it first reads and replays the entire log from
the disk to recreate the same state it had when it was last shut down.
Of course, the logging could also be done synchronically (and for the time
being, that's what I'm doing), but that will mean a slight performance hit,
and since my main goal here is not to deliver a working webapp as soon as
possible, but simply to experiment and learn, I'd like to go all the way.
Guido
--
Oh my science!
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