Hi,
I tried searching on the Internet and I have "The Apache Modules Book" by
Nick Kew. I haven't been able to find an answer to my question so far.
I am writing an Apache module that will spawn a configurable number of
"server-type" processes. The Apache module will handle incoming requests
and forward them to these spawned server processes.
I would like to use the apr_proc API to spawn these processes and manage
them (e.g. kill, respawn if crashed, etc.). It seems as though the
apr_proc function calls are well-equipped to handle this situation. The
documentation I've seen (http://apr.apache.org/docs/apr/1.2) doesn't
provide enough detail for me to grasp how to use the more advanced part of
this API.
It seems as though I want to spawn these server processes as detached and
then use apr_proc_other_child_register() to register a maintenance
callback so that I can be notified if they are killed. It seems as though
to make this mechanism work, I'll need to call
apr_proc_other_child_refresh_all() to refresh the status (which will call
the maintenance function, as needed).
Is this the correct approach?
I suppose I could also start a thread that starts the server process not
detached and waits with apr_proc_wait(). This approach seems convoluted
and it raises the question of how to cull the server processes that are
spawned from the thread.
I hope that I've described the problem clearly enough. Any help you can
give me would be greatly appreciated.
Regards,
Erik.
