There is a number of modules on CPAN that already do similar things
Ben
-Original Message-
From: Christopher Grau [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, December 17, 2002 12:05 PM
To: [EMAIL PROTECTED]
Subject: Re: AUTOLOAD in mod_perl (was Re: When perl is not quite
fastenough)
I may be veering off-topic, but I've started doing similar things in
my
own code (generating accessor methods via AUTOLOAD). I ended up
writing
`Class::Autoload,' which I intend to upload to CPAN when I'm done with
documentation and testing.
Basically, it exports an AUTOLOAD function that will work with the
%FIELDS hash to insert accessor methods into the symbol table as
needed. There's also a compile() method that can be used to
precompile
the methods, which I thought was relevent, given the mod_perl/memory
discussion. It also provides for read-only methods, and a typing
system
like that of `Class::Class.'
If there's interest, I'll clutter up the list some more with the POD.
On Tue, 2002-12-17 at 11:13, kyle dawkins wrote:
Perrin (et al... cc'ing this back to the list)
Thanks for this information... it is confirming what I originally
thought, so I don't need to change my code (yet). But I wanted to
post
it back to the list to everyone else can benefit from it.
I personally tend to avoid AUTOLOAD, only because it is a piece of
perl
magic that can be super-confusing to developers coming to perl
(and
mod_perl) from other languages (um, Java) and I think there's a
voodoo-level involved that's a bit high for my tastes. In the one
place I use it, I don't generate anything, just trap calls to
methods
with AUTOLOAD and perform a lookup based on the arguments. If it
really is that slow, maybe I'll even rewrite that to use something
other than AUTOLOAD.
Cheers!
Kyle Dawkins
Central Park Software
On Tuesday, Dec 17, 2002, at 13:13 US/Eastern, Perrin Harkins wrote:
kyle dawkins wrote:
Sorry to mail you directly... can you just give me two cents on
your
comment below about AUTOLOAD, mod_perl and memory sharing? I
use
AUTOLOAD in one module to perform accessors and I wonder if
there's a
better way to save memory.
AUTOLOAD is kind of slow, so most people put something in there to
define their accessors as subs by manipulating the symbol table.
It's
easy, and Damian's book has an example.
In mod_perl, you want any methods that you expect to be called to
be
defined in the parent process so they will be shared. I do this
by
building all of the accessors in a BEGIN block in my module which
is
called when I use it in startup.pl.
- Perrin
