Re: [Templates] TT in callback

> Caching the object is very important. It makes a big difference in

Perrin Harkins wrote:
> Caching the object is very important.  It makes a big difference in
> performance.  Please change that.
> 
> (Hmm... maybe CPAN needs some kind of Template::Toolkit::Singleton
> module to make this more obvious to people.)

For TT3 I'm thinking that the Template module should allow its methods
to be called as class methods.  

    use Template;
    Template->process(...);

When called in this way, the process() and other related methods would
create and operate on a singleton object.  It might be the case that you 
have to set an extra configuration option like 'singleton' or 'reusable'
to invoke this behaviour (otherwise it creates a new object per invocation), 
or it might be the default - I haven't decided yet.  But either way it should 
be easy to enable/disable.

Configuration options for the singleton could be defined as 'use' options, 
e.g.  

    use Template templates_path => '/home/abw/templates'
                 interpolate    => 1;

Or by calling a config() method:

   use Template;
   Template->config( templates_path => '/home/abw/templates',
                     interpolate    => 1 );
   Template->process(...);

Or by creating your own subclass and defining a hash array of options as
the $CONFIG package variable:

   package abw::Template;
   use base 'Template';
   our $CONFIG = {
       templates_path => '/home/abw/templates',
       interpolate    => 1,
   };

   package main;
   abw::Template->process(...);

Note that templates_path is the new TT3 name for INCLUDE_PATH and other 
options like INTERPOLATE are now lower case by default.  However, the 
Template::TT2 module will provide a backwards compatibility interface
for those who want to use the old skool options.

   # either
   use Template::TT2 INCLUDE_PATH => '/home/abw/templates';

   # or
   use Template::TT2;
   Template::TT2->config( INCLUDE_PATH => ... );

   # and so on...

Comments welcome.

A

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