Apache2::porting -- a helper module for mod_perl 1.0 to mod_perl 2.0 porting
# either add at the very beginning of startup.pl
# or httpd.conf
# now issue requests and look at the error_log file for hints
"Apache2::porting" helps to port mod_perl 1.0 code to run under
mod_perl 2.0. It doesn't provide any back-compatibility functionality, however
it knows to trap methods calls that are no longer in the mod_perl 2.0 API and
tell what should be used instead if at all. If you attempts to use mod_perl
2.0 methods without first loading the modules that contain them, it will tell
you which modules you need to load. Finally if your code tries to load modules
that no longer exist in mod_perl 2.0 it'll also tell you what are the modules
that should be used instead.
"Apache2::porting" communicates with users via the error_log
file. Everytime it traps a problem, it logs the solution (if it finds one) to
the error log file. If you use this module coupled with
"Apache2::Reload" you will be able to port your applications quickly
without needing to restart the server on every modification.
It starts to work only when child process start and doesn't work for the code
that gets loaded at the server startup. This limitation is explained in the
It relies heavily on "ModPerl::MethodLookup". which can also be used
manually to lookup things.
"Apache2::porting" uses the "UNIVERSAL::AUTOLOAD" function
to provide its functionality. However it seems to be impossible to create
"UNIVERSAL::AUTOLOAD" at the server startup, Apache segfaults on
restart. Therefore it performs the setting of "UNIVERSAL::AUTOLOAD"
only during the child_init
phase, when child processes start. As a
result it can't help you with things that get preloaded at the server startup.
If you know how to resolve this problem, please let us know. To reproduce the
problem try to use an earlier phase, e.g. "PerlPostConfigHandler":
Apache2::ServerUtil->server->push_handlers(PerlPostConfigHandler => \&porting_autoload);
META: Though there is a better solution at work, which assigns AUTOLOAD for each
class separately, instead of using UNIVERSAL. See the discussion on the dev
list (hint: search the archive for EazyLife)
mod_perl 2.0 documentation.
mod_perl 2.0 and its core modules are copyrighted under The Apache Software
License, Version 2.0.
The mod_perl development team and numerous contributors.