Re: [Cppcms-users] Fw: Unmount asynchronous application from application pool

[DieterM75 . <die...@gm...>]

Thanks,

after reading some notes about signals and combining it with your snippets,
it seems to work now.
Would be grateful to get an opinion on the code from you (
http://pastie.org/8493685).

Sincerely
Dieter


On Tue, Nov 19, 2013 at 9:13 AM, Artyom Beilis <art...@ya...> wrote:

>
>   On Tuesday, November 19, 2013 10:05 AM, Artyom Beilis <
> art...@ya...> wrote:
>
> What handler to be called?
>
> I assume you are working on linux. If you want to reload the
> application/system per SIGHUP you need
> create appropriate singal handler. Signals are not just callbacks, they
> are very different. They do stuff differently.
>
> Also I'm not even sure about what are you trying to do.
>
> See this is the original code:
>
>   while(1) {
>         cppcms::service srv(...)
>         srv.run();
>         if(got_sighup) {
>           got_sighup = false;
>           continue;
>         }
>         break;
>    }
>
>
> Now lets say you want to add an async application:
>
>   while(1) {
>         booster::intrusive_ptr<myapp> p(new myapp)
>         cppcms::service srv(...)
>         srv.mount(p,...)
>         srv.run();
>         p = 0; // reset there...
>         if(got_sighup) {
>           got_sighup = false;
>           continue;
>         }
>         break;
>    }
>
> Thats it... How hard can it be?
>
> Artyom Beilis
> --------------
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>
>
>   On Monday, November 18, 2013 11:45 PM, DieterM75 . <die...@gm...>
> wrote:
>
>
> Thanks for your answers, I appreciate it!
>
> If you believe it or not, I have read every single page on the wiki and
> tried to understand the application pool and the service class. The thing
> is, most of it is written very minimalistic. And I can understand it, time
> is valuable. I am writing managed code for a living and I also want to
> learn, try things out and in the end understand the framework, but I sure
> get stuck without some input.
>
> For instance the handler code on page "Reload the application" cannot
> compile, because no return type is specified. Furthermore I had a look
> inside the application base class and there is no potential handler method
> that could be overridden. So how is it supposed to get called?
>
> Sincerely
>
>
> On Mon, Nov 18, 2013 at 10:04 PM, Artyom Beilis <art...@ya...>wrote:
>
> > Well thanks for the really helpful reply (not).
>
> First of all, instead of being sarcastic I'd suggest you to read... manual
> pages about signal handling and understand how the code in wiki works and
> why, also read about cppcms::service::shutdown, read about the event loop
> in the wiki and so on.
>
> As I told you, your pattern is wrong, you should be based on the pattern
> in wiki.
>
> What is wrong:
>
> - wrong signal handler
> - wrong exception implementation
> - wrong assumption about how exceptions are handled... etc
>
> Instead reinventing the wheel, do as I told you in the previous mails, all
> you need to reset the application pointer when the srv.run() exits, before
> you restart the service.
>
>
>
>
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