NAME

Log::Dispatch::WarnDie - Log standard Perl warnings and errors

SYNOPSIS

 use Log::Dispatch::WarnDie; # install to be used later

 my $dispatcher = Log::Dispatch->new;
 $dispatcher->add( Log::Dispatch::WarnDie->new(
  name      => 'foo',
  min_level => 'info',
 ) );

 use Log::Dispatch::WarnDie $dispatcher; # activate later

 Log::Dispatch::WarnDie->dispatcher( $dispatcher ); # same

 warn "This is a warning"; # now also dispatched
 die "Sorry it didn't work out"; # now also dispatched

 no Log::Dispatch::WarnDie; # deactivate later

 Log::Dispatch::WarnDie->dispatcher( undef ); # same

 warn "This is a warning"; # no longer dispatched
 die "Sorry it didn't work out"; # no longer dispatched

DESCRIPTION

The ``Log::Dispatch::WarnDie'' module offers a logging alternative for standard Perl core functions. This allows you to use the features of the Log::Dispatch manpage without having to make extensive changes to your source code.

When loaded, it installs a __WARN__ and __DIE__ handler. It also takes over the messaging functions of the Carp manpage. Without being further activated, the standard Perl logging functions continue to be done.

Then, when necessary, you can activate actual logging through Log::Dispatch by installing a log dispatcher. From then on, any warn, die, carp, croak, cluck or confess will be logged using the Log::Dispatch logging dispatcher. Logging can be disabled and enabled at any time for critical sections of code.

REQUIRED MODULES

 (none)

CAVEATS

The following caveats may apply to your situation.

Associated modules

Although the Log::Dispatch manpage is not listed as a prerequisite, the real use of this module only comes into view when that module is installed. Please note that for testing this module, you will need the the Log::Dispatch::Buffer manpage module to also be available.

eval

In the current implementation of Perl, a __DIE__ handler is also called inside an eval. Whereas a normal die would just exit the eval, the __DIE__ handler _will_ get called inside the eval. Which may or may not be what you want. To prevent the __DIE__ handler to be called inside eval's, add the following line to the eval block or string being evaluated:

  local $SIG{__DIE__} = undef;

This disables the __DIE__ handler within the evalled block or string, and will automatically enable it again upon exit of the evalled block or string. Unfortunately there is no automatic way to do that for you.

AUTHOR

Elizabeth Mattijsen, <liz@dijkmat.nl>.

Please report bugs to <perlbugs@dijkmat.nl>.

COPYRIGHT

Log::Dispatch::WarnDie - Log standard Perl warnings and errors