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  Activator::Log->WARN( $msg );
  Activator::Log->INFO( $msg );
  Activator::Log->DEBUG( $msg );
  Activator::Log->TRACE( $msg );

=head2 Using Alternate Loggers

You can set the default logger dynamically:

  Activator::Log->default_logger( 'My.Default.Logger' );

Note that since C<Activator::Log> is a singleton, this sub will set
the level for the entire process. This is probably fine for cron jobs,
not so good for web processes.

You can avoid trouble by logging to an alternate Log4perl logger
without changing the default logger:

  Activator::Log->DEBUG( $msg, 'My.Configured.Debug.Logger' );

=head2 Setting Log Level Dynamically

You can set the minimum level with the C<default_level> sub:

  # only show only levels WARN, ERROR and FATAL
  Activator::Log->default_level( 'WARN' );

  # only show only levels ERROR and FATAL
  Activator::Log->default_level( 'ERROR' );

Note that since C<Activator::Log> is a singleton, this sub will set
the level for the entire process. This is probably fine for cron jobs,
not so good for web processes.

=head2 Additional Functionality provided

The following Log::Log4perl subs you would normally call with
$logger->SUB are supported through a static call:

  Activator::Log->logwarn( $msg );
  Activator::Log->logdie( $msg );
  Activator::Log->error_warn( $msg );
  Activator::Log->error_die( $msg );
  Activator::Log->logcarp( $msg );
  Activator::Log->logcluck( $msg );
  Activator::Log->logcroak( $msg );
  Activator::Log->logconfess( $msg );
  Activator::Log->is_trace()
  Activator::Log->is_debug()
  Activator::Log->is_info()
  Activator::Log->is_warn()
  Activator::Log->is_error()
  Activator::Log->is_fatal()

See the L<Log::Log4perl> documentation for more details.

=head1 CONFIGURATION

=head2 Log::Log4perl

Activator::Log looks in your Registry for a L<Log::Log4perl>
configuration in this heirarchy:

1) A 'log4perl.conf' file in the registry:

  Activator:
    Log:
      log4perl.conf: <file>

2) A 'log4perl' config in the registry:

  Activator:
    Log:
      log4perl:
        'log4perl.key1': 'value1'
        'log4perl.key2': 'value2'
        ... etc.

3) If none of the above are set, C<Activator::Log> defaults to showing WARN level to
C<STDERR> as shown in this log4perl configuration:

  log4perl.logger.Activator.Log = WARN, Screen
  log4perl.appender.Screen = Log::Log4perl::Appender::Screen
  log4perl.appender.Screen.layout = Log::Log4perl::Layout::PatternLayout
  log4perl.appender.Screen.layout.ConversionPattern = %d{yyyy-mm-dd HH:mm:ss.SSS} [%p] %m (%M %L)%n


NOTE: If C<log4perl.conf> or C<log4perl> is set, it is possible you
will see no logging since L<Log::Log4perl> by default doesn't log
anything. That is, you could have configured this module properly, but
still see no logging.

NOTE 2: You must properly configure L<Log::Log4perl> for this module!

NOTE TO SELF: create a test sub to make life easier

=head2 Setting the Default Logger

Log4Perl can have multiple definitions for loggers. If your script or
program has a preferred logger, set the Registry key c<default_logger>:

  Activator:
    Log:
      default_logger: <logger name IN log4perl.conf>

=head2 Setting the Default Log Level

Set up your registry as such:

  Activator:
    Log:
      default_level: LEVEL

Note that you can also initialize an instance of this module with the
same affect:

  Activator::Log->new( $level );

=head1 DISABLING DEBUG OR TRACE BY MODULE

By default, this module will print all C<DEBUG> and C<TRACE> log messages