[Catalyst] Constructor's instrumentation

Antoine HULIN gabuzo at sitadelle.com
Tue Oct 4 15:54:54 CEST 2005


I'd like to see what's going on in a model's constructor (the class is
named Fact::M::Storage). So I added the following statement :

 $c->log->info("taratata");

The statement is executed but the script fails later on as shown in the
following trace :

  gabuzo at meuh:~/Fact$ ./script/fact_server.pl
  [Tue Oct  4 15:09:47 2005] [catalyst] [debug] Debug messages enabled
  [Tue Oct  4 15:09:47 2005] [catalyst] [debug] Loaded dispatcher "Catalyst::Dispatcher"
  [Tue Oct  4 15:09:47 2005] [catalyst] [debug] Loaded engine "Catalyst::Engine::HTTP"
  [Tue Oct  4 15:09:47 2005] [catalyst] [debug] Found home "/home/gabuzo/Devel/Fact"
  [Tue Oct  4 15:09:48 2005] [catalyst] [info] taratata
  [Tue Oct  4 15:09:48 2005] [catalyst] [debug] Loaded components:
  .=----------------------------------------------------------------------------=.
  |                                                                            1 |
  | Fact::C::Reference                                                           |
  | Fact::C::css                                                                 |
  | Fact::V::TT                                                                  |
  '=----------------------------------------------------------------------------='
  
  Can't call method "isa" without a package or object reference at
  /usr/share/perl5/Catalyst/Dispatcher.pm line 387.
  Compilation failed in require at ./script/fact_server.pl line 13.
  BEGIN failed--compilation aborted at ./script/fact_server.pl line 13.


Line 387 in Dispatcher is the inheritance test in setup_action() :

        # We only setup components that inherit from Catalyst::Base
	next unless $comp->isa('Catalyst::Base');

I also replaced $c-log->info() with a print statement and got the same
behaviour.

I don't understand why this logging is so disturbing and I'd like to
know what the right way to see what's going on in a constructor is.

Antoine



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