Catalyst::Log(3p)

NAME
Catalyst::Log - Catalyst Log Class

SYNOPSIS
    $log = $c->log;
    $log->debug($message);
    $log->info($message);
    $log->warn($message);
    $log->error($message);
    $log->fatal($message);

    if ( $log->is_debug ) {
         # expensive debugging
    }

See Catalyst.

DESCRIPTION
This module provides the default, simple logging functionality for Catalyst. If you want something different set "$c->log" in your application module, e.g.:

    $c->log( MyLogger->new );

Your logging object is expected to provide the interface described here. Good alternatives to consider are Log::Log4Perl and Log::Dispatch.

If you want to be able to log arbitrary warnings, you can do something along the lines of

    $SIG{__WARN__} = sub { MyApp->log->warn(@_); };

however this is (a) global, (b) hairy and (c) may have unexpected side effects. Don't say we didn't warn you.

LOG LEVELS

  debug
    $log->is_debug;
    $log->debug($message);

  info
    $log->is_info;
    $log->info($message);

  warn
    $log->is_warn;
    $log->warn($message);

  error
    $log->is_error;
    $log->error($message);

  fatal
    $log->is_fatal;
    $log->fatal($message);

METHODS

  new
Constructor. Defaults to enable all levels unless levels are provided in arguments.

    $log = Catalyst::Log->new;
    $log = Catalyst::Log->new( 'warn', 'error' );

  level
Contains a bitmask of the currently set log levels.

  levels
Set log levels

    $log->levels( 'warn', 'error', 'fatal' );

  enable
Enable log levels

    $log->enable( 'warn', 'error' );

  disable
Disable log levels

    $log->disable( 'warn', 'error' );

  is_debug

  is_error

  is_fatal

  is_info

  is_warn
Is the log level active?

  abort
Should Catalyst emit logs for this request? Will be reset at the end of each request.

*NOTE* This method is not compatible with other log apis, so if you plan to use Log4Perl or another logger, you should call it like this:

    $c->log->abort(1) if $c->log->can('abort');

  autoflush
When enabled (default), messages are written to the log immediately instead of queued until the end of the request.

This option, as well as "abort", is provided for modules such as Catalyst::Plugin::Static::Simple to be able to programmatically suppress the output of log messages. By turning off "autoflush" (application-wide setting) and then setting the "abort" flag within a given request, all log messages for the given request will be suppressed. "abort" can still be set independently of turning off "autoflush", however. It just means any messages sent to the log up until that point in the request will obviously still be emitted, since "autoflush" means they are written in real-time.

If you need to turn off autoflush you should do it like this (in your main app class):

    after setup_finalize => sub {
      my $c = shift;
      $c->log->autoflush(0) if $c->log->can('autoflush');
    };

  _send_to_log
 $log->_send_to_log( @messages );

This protected method is what actually sends the log information to STDERR. You may subclass this module and override this method to get finer control over the log output.

  psgienv $env
    $log->psgienv($env);

NOTE: This is not meant for public consumption.

Set the PSGI environment for this request. This ensures logs will be sent to the right place. If the environment has a "psgix.logger", it will be used. If not, we will send logs to "psgi.errors" if that exists. As a last fallback, we will send to STDERR as before.

  clear_psgi
Clears the PSGI environment attributes set by "psgienv".

  meta

SEE ALSO
Catalyst.

AUTHORS
Catalyst Contributors, see Catalyst.pm

COPYRIGHT
This library is free software. You can redistribute it and/or modify it under the same terms as Perl itself.