Re: [cgiapp] Calling external modules?

[Darin McBride <suppressed>]

On October 30, 2003 07:58 am, Clint Moore wrote:
> I swear that it is probably something that I am doing but I can't for
> the life of me figure out where I'm going wrong.  I have some run_modes
> defined in a separate file and referenced like this:
>
> sub setup {
>       my $self = shift;
>       $self->run_modes(
>               'mode1' => 'Module::method(\$self)',
>               'mode2' => 'Module::method2(\$self)',
>       );
> }
>
>       In 5.6.0 this worked no problem.  Now that I have upgraded to 5.8.x, I
> cannot get this to work for anything.

You probably also upgrade C::A at the same time.  You probably were
getting this to work due to some accident of design where the older
versions of C::A used eval STRING to run the runmodes.  Current
versions use eval EXPR because it's way faster.

This could be looked at as a regression in functionality, except that
what you're doing was never intended to work from what I can tell in
the docs..  So I'd like to think of this as a tightening of
functionality rather than a regression ;->

You'll probably want to do something like these:

$self->run_modes(
  'mode1' => sub { Module::method1(@_); },
  'mode2' => sub { Module::method2(@_); },
);

or

$self->run_modes(
  'mode1' => \&Module::method1,
  'mode2' => \&Module::method2,
);

Both of these are untested, but should give you enough of an idea to go
on with.  The point is that you're supposed to pass in either the name
of a function inside your C::A-derived object, or a code ref.  The
above two examples both use the code-ref idea - the first uses anon
code refs, the second uses named code refs.

I'm sure there's a way to get this to work with strings, too, but I've
not tried.  For example, this might work, too:

$self->run_modes(
  'mode1' => 'Module::method1',
  'mode2' => 'Module::method2',
);

I prefer the code refs myself ;-)


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