At 10:07 -0500 1/17/04, Geoffrey Young wrote:
> I realize (now) that there is a way to find out which method
> resides in which module:
http://perl.apache.org/docs/2.0/user/porting/porting.html#Using_C_ModPerl__MethodLookup__to_Discover_Which_mod_perl_2_0_Modules_Need_to_Be_Loaded
> but why does this have to be done manually? Why can't there be an
AUTOLOAD sub that _by default_ puts a warning in the error log, loads
> the right module and just makes the right sub gets called?
IIRC MethodLookup does have a 'load all' feature. but other than that, see
Apache::porting.
And it's not on by default, because AUTOLOAD introduces all kind of problems. And as explained in:
http://perl.apache.org/docs/2.0/api/ModPerl/MethodLookup.html#C_AUTOLOAD_
and I weren't able to use it in any phase before PerlChildInitHandler, which means that it won't work for your startup.pl.
The problem comes from the fact that we need to use UNIVERSAL::AUTOLOAD. We can't use plain package AUTOLOAD, precisely because of the chicken and egg problem. We don't know which module to load, and if we load them all, we don't need AUTOLOAD. So I figured UNIVERSAL::AUTOLOAD is the only workable solution.
If you have better ideas solving this problem I'm all ears.
That's fine, but that's introducing bloat (which may not be such a problem with perfork MPM's, but _may_ be a problem with other MPM's, particularly based on Perl 5 ithreads).
Maybe it shouldn't be an AUTOLOAD, but a custom die() handler... ;-)
But someone needs to trigger that custom die() handler. Or are you talking about installing $SIG{__DIE__} instead of using AUTOLOAD for trapping? You are aware that doing that comes with its own pile of problems, in certain contexts (.e.g. eval {} blocks)
Anyway, loading these methods on demand may actually be very useful for Perl 5 ithreaded based MPM's!
;)
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