libs/DesignPattern/Logger.pm

## ------------------------------------------------------------------------
##  $Id: Logger.pm,v 1.1 2003/02/19 00:34:52 joko Exp $
## ------------------------------------------------------------------------
##  $Log: Logger.pm,v $
##  Revision 1.1  2003/02/19 00:34:52  joko
##  + initial commit, again refactored to this place
##
##  Revision 1.3  2003/02/18 18:33:59  joko
##  + fix: just logs if possible
##
##  Revision 1.2  2003/02/18 16:37:22  joko
##  + fix: ...::Hardwired is an optional module
##
##  Revision 1.1  2003/02/18 15:57:34  joko
##  + initial commit, refactored from DesignPattern::Object::Logger
##
##  Revision 1.2  2003/02/14 14:20:42  joko
##  + decreased default log-level to debug
##
##  Revision 1.1  2002/12/22 14:17:38  joko
##  + initial check-in, refactored
##
##  Revision 1.1  2002/12/19 01:14:48  cvsjoko
##  + initial check-in
##
## ------------------------------------------------------------------------


package DesignPattern::Logger;

use strict;
use warnings;

use Data::Dumper;
use Log::Dispatch;
use Log::Dispatch::Screen;
use Log::Dispatch::Config;
use Cwd;
use DesignPattern::Object;

use vars qw(
  $LEVEL_DEFAULT
  $ENABLE_NAMESPACE
  $NAMESPACE_LEVEL
  $ENABLE_METHODS
  $METHOD_LEVELS
  $TRACE_STACK_LEVELS
);

# default behaviour
$LEVEL_DEFAULT = 'debug';
$ENABLE_NAMESPACE = 1;
$NAMESPACE_LEVEL = undef;
$ENABLE_METHODS = 0;
$METHOD_LEVELS = [3];
$TRACE_STACK_LEVELS = [];


# TODO: review, revise and rewire this!
#my $logger = Log::Dispatch::Config->instance;

sub __init {
  my $self = shift;
  my $action = shift;
  my $message = shift;
  #my $options = shift;   # ??? or: $self->{__logger}->{options} already...?

  # configure
  if (!$self->{__logger}->{configured}) {
    $self->{__logger}->{configured} = 1;
    $self->_configure_LogDispatch();
  }
  
  # set passed-in arguments
  $self->{__logger}->{action} = $action;
  $self->{__logger}->{message} = $message;

  # trace
    #my $tmp = caller(2);
    #print Dumper($tmp);
    #exit;
  

  # handle caller

    # determine class- and subroutinename of context calling us
    # this task can be controlled by tuning its behaviour
    # this can be changed by setting
    #   DesignPattern::Logger::...
    #   ...
    #   ...
    my $calling_class;
    my $calling_sub;


    # Default behaviour is:
    #   Use classname from $self and suppress subroutine name.
    #   In case of using this together with DesignPattern::Bridge,
    #   the classnames of child objects are suppressed.
    #   Instead, the classname of the parent container object
    #   gets used *always*.
      $calling_class = '';
      $calling_sub = '';

      # Log class names (en-/disabled, take from specified level)
      if ($ENABLE_NAMESPACE) {
        $calling_class = ref $self;
        if ($NAMESPACE_LEVEL) {
          my @entry = caller($NAMESPACE_LEVEL);
          $calling_class = $entry[0];
        }
      }

      # Log method names (en-/disabled, multi-level)
      if ($ENABLE_METHODS) {
        my @methods;
        foreach (@{$METHOD_LEVELS}) {
          (my $c_package, my $c_filename, my $c_line, my $c_subroutine, my $c_hasargs,
          my $c_wantarray, my $c_evaltext, my $c_is_require, my $c_hints, my $c_bitmask) = caller($_);
          $c_subroutine =~ s/.*:://;
          push @methods, $c_subroutine;
        }
        $calling_sub = join(': ', @methods);
      }
  
    
  # set default arguments
  $self->{__logger}->{classname} = $calling_class;
  $self->{__logger}->{functionname} = $calling_sub;
  # FIXME: deprecate this!
  $self->{__logger}->{caller} = caller;
  
  # set default values
  $self->{__logger}->{action} ||= '';
  $self->{__logger}->{options}->{tag} ||= '';
  
  # FIXME: deprecate this!
  #$self->{__logger}->{level} ||= 'info';
  #$self->{__logger}->{level} ||= 'debug';
  $self->{__logger}->{level} ||= $LEVEL_DEFAULT;

  # handle stacktrace
    foreach (@$TRACE_STACK_LEVELS) {
      #print "trace-level: ", $_, "\n";
      #(my $c_package, my $c_filename, my $c_line, my $c_subroutine, my $c_hasargs,
      #my $c_wantarray, my $c_evaltext, my $c_is_require, my $c_hints, my $c_bitmask) = caller($_);
      my @entry = caller($_);
      push @{$self->{__logger}->{trace}->{stack}}, \@entry;
    }
  
}

sub __out {
  my $self = shift;
  my $message = shift;
  
  # if message given here, append to message stored inside object
  $self->{__logger}->{message} .= ' - ' . $message if $message;
  
  # TODO: refactor this:
  #  - push '$self->__get_prefix()' to additional log-entry-metadata, don't show it on/in any console/logfile output
  #$logger->log( level => $self->{__logger}->{level}, message => $self->__get_prefix_long() . $message );
  #$logger->log( level => $self->{__logger}->{level}, message => $message );
  #$logger->warning( __PACKAGE__ . "->_skip: '$caller' (mixed into '$classname'): ($options->{tag}) $message.");
  #$self->{__logger}->{instance}->log( level => $self->{__logger}->{level}, message => $self->__get_prefix_short() . $self->{__logger}->{message} );
  #$self->{__logger}->{instance}->log( level => $self->{__logger}->{level}, message => $self->__get_prefix_module() . $self->{__logger}->{message} );
  $self->{__logger}->{instance}->log( level => $self->{__logger}->{level}, message => $self->__get_prefix_best() . $self->{__logger}->{message} );
}


sub __handle_options {
  my $self = shift;
  #my $options = shift;   # ??? or: $self->{__logger}->{options} already...?
}

sub __get_prefix_long {
  my $self = shift;
  return __PACKAGE__ . "->$self->{__logger}->{action}: '$self->{__logger}->{caller}' (mixed into '$self->{__logger}->{classname}'): ($self->{__logger}->{options}->{tag}) - ";
}

sub __get_prefix_short {
  my $self = shift;
  my $tag_append = '';
  $tag_append = "$self->{__logger}->{options}->{tag} - " if $self->{__logger}->{options}->{tag};
  return $self->{__logger}->{classname} . "->$self->{__logger}->{action}: $tag_append";
}

sub __get_prefix_module {
  my $self = shift;
  my $tag_append = '';
  $tag_append = "$self->{__logger}->{options}->{tag} - " if $self->{__logger}->{options}->{tag};
  return $self->{__logger}->{classname} . ": $tag_append";
}


sub __get_prefix_best {
  my $self = shift;
  my $namespace = $self->{__logger}->{classname};
  my $method = '';
  my $tag_append = '';
  #$namespace = $namespace . ": " if $namespace;
  $method = "->" . $self->{__logger}->{functionname} if $self->{__logger}->{functionname};
  #$method .= ': ' if $method;
  $tag_append = "$self->{__logger}->{options}->{tag} - " if $self->{__logger}->{options}->{tag};
  
  my @line;
  push @line, $namespace if $namespace;
  push @line, $method if $method;
  push @line, $tag_append if $tag_append;
  
  #print Dumper(@line);
  
  #return join(': ', @line);
  my $result = join('', @line);
  $result .= ': ' if $result;
  
  return $result;
  
}


sub log {
  my $self = shift;
  my $message = shift;
  
  # automagically instantiate the object if not there
  # TODO: do this by creating a dummy object inheriting from DesignPattern::Logger,
  # for now this just don't work because which dummy one to take: Data::Code::Null?
  #if (! ref $self) {
  #  $self = DesignPattern::Object->fromPackage('DesignPattern::Logger');
  #}
  
  $self->{__logger}->{level} = shift;    # TODO: implement propagation of this into Log::Dispatch-object '$logger'!
  $self->{__logger}->{options} = shift;   # TODO: implement additional behaviours: e.g. { exit => 1 } would exit after tracedump
  
  #$self->__init('log', $message);
  $self->__init('log', $message);
  $self->__out();
  
}

sub skip {
  my $self = shift;
  my $message = shift;
  my $condition = shift;
  $self->{__logger}->{level} = shift;    # TODO: implement propagation of this into Log::Dispatch-object '$logger'!
  $self->{__logger}->{options} = shift;   # TODO: implement additional behaviours: e.g. { exit => 1 } would exit after tracedump

  my $classname = ref $self;
  my $caller = caller;

  $self->{__logger}->{options}->{tag} ||= '';

  if ($condition) {
    # V1:
    #$logger->warning( __PACKAGE__ . "->_skip: '$caller' (mixed into '$classname'): ($options->{tag}) $message.");
    # V2:
    $self->__init('skip', $message);
    $self->__out();
    return 1;
  }
}

sub trace {
  my $self = shift;
  my $message = shift;
  my $data = shift;
  my $condition = shift;
  $self->{__logger}->{level} = shift;    # TODO: implement propagation of this into Log::Dispatch-object '$logger'!
  $self->{__logger}->{options} = shift;   # TODO: implement additional behaviours: e.g. { exit => 1 } would exit after tracedump
  
  my $classname = ref $self;
  my $caller = caller;

  $self->{__logger}->{options}->{tag} ||= '';

  # don't do _any_ tracing if disabled
  return if $self->{TRACE_DISABLED};
  
  # overwrite condition with local configured want-TRACE
  $condition ||= $self->{TRACE};
  
  # dump data
    my $result = 0;
    if ($condition) {
      $message .= " - " . Dumper($data);
      
      # V1:
      # $self->__init('trace');
      # $logger->info( __PACKAGE__ . "->trace: '$caller' (mixed into '$classname'): ($options->{tag}) $message.");
      
      # V2:
      $self->__init('trace', $message);
      $self->__out();
      
      $result = 1;
    } else {
      $result = 0;
    }

  # handle additional options
  if ($self->{TRACE_OPTIONS}) {
    exit if $self->{__logger}->{options}->{exit};
  }

  return $result;
}


sub _configure_LogDispatch {
  my $self = shift;

  my $configurator = DesignPattern::Object->fromPackage('Log::Dispatch::Configurator::Hardwired');
  
  # FIXME?
  my $basepath = cwd() . '/..';
  
  # configure custom logHandler
  
    if ($configurator) {
  
      $configurator->{file_filename} = "$basepath/var/log/logfile.txt";
      $configurator->{screen_min_level} = 'info';
      
      if ($self->{quiet}) {
        $configurator->{screen_min_level} = 8;
      }
  
      if ($self->{debug}) {
        $configurator->{screen_min_level} = 'debug';
      }
      
      if ($self->{verbose}) {
        $configurator->{verbose} = 1;
      }

      Log::Dispatch::Config->configure($configurator);
      $self->{__logger}->{instance} = Log::Dispatch::Config->instance;

    } else {

      #Log::Dispatch::Config->configure();
      #Log::Dispatch->configure();
      #$self->{__logger}->{instance} = Log::Dispatch->new;
      $self->{__logger}->{instance} = Log::Dispatch::Screen->new( name => 'screen', 'min_level' => 'debug', stderr => 1 );
    
    }


}

sub configure_logger {
  my $self = shift;

  # automagically instantiate the object if not there
  # TODO: do this by creating a dummy object inheriting from DesignPattern::Logger,
  # for now this just don't work because which dummy one to take: Data::Code::Null?
  if (! ref $self) {
    $self = DesignPattern::Object->fromPackage('DesignPattern::Logger');
  }

  #print "logconfig\n";
  $self->_configure_LogDispatch();
}


# for standalone use
sub new { my $class = shift; my $self = {}; bless $self, $class; }

# convenient shortcuts
# FIXME: create these automagically by mungling with symbolic references
# or: make this object tied to recieve kinda events on method calls

sub debug {
  my $self = shift;
  my $message = shift;
  $self->log($message, 'debug');
}

sub warning {
  my $self = shift;
  my $message = shift;
  $self->log($message, 'warning');
}

sub info {
  my $self = shift;
  my $message = shift;
  $self->log($message, 'info');
}

sub notice {
  my $self = shift;
  my $message = shift;
  $self->log($message, 'notice');
}


=pod

=head1 TODO
  
  o $TRACE_STACK_LEVELS   (traces stack history)
  o $ENABLE_DEBUG   (en-/disables level 'debug')
  o $ENABLE_LOG   (en-/disables logging completely)


=cut


1;
__END__
1	joko	1.1	## ------------------------------------------------------------------------
2	joko	1.2	## $Id: Logger.pm,v 1.1 2003/02/19 00:34:52 joko Exp $
3	joko	1.1	## ------------------------------------------------------------------------
4	joko	1.2	## $Log: Logger.pm,v $
5			## Revision 1.1 2003/02/19 00:34:52 joko
6			## + initial commit, again refactored to this place
7			##
8	joko	1.1	## Revision 1.3 2003/02/18 18:33:59 joko
9			## + fix: just logs if possible
10			##
11			## Revision 1.2 2003/02/18 16:37:22 joko
12			## + fix: ...::Hardwired is an optional module
13			##
14			## Revision 1.1 2003/02/18 15:57:34 joko
15			## + initial commit, refactored from DesignPattern::Object::Logger
16			##
17			## Revision 1.2 2003/02/14 14:20:42 joko
18			## + decreased default log-level to debug
19			##
20			## Revision 1.1 2002/12/22 14:17:38 joko
21			## + initial check-in, refactored
22			##
23			## Revision 1.1 2002/12/19 01:14:48 cvsjoko
24			## + initial check-in
25			##
26			## ------------------------------------------------------------------------
27
28
29			package DesignPattern::Logger;
30
31			use strict;
32			use warnings;
33
34			use Data::Dumper;
35			use Log::Dispatch;
36			use Log::Dispatch::Screen;
37			use Log::Dispatch::Config;
38			use Cwd;
39			use DesignPattern::Object;
40
41	joko	1.2	use vars qw(
42			$LEVEL_DEFAULT
43			$ENABLE_NAMESPACE
44			$NAMESPACE_LEVEL
45			$ENABLE_METHODS
46			$METHOD_LEVELS
47			$TRACE_STACK_LEVELS
48			);
49
50			# default behaviour
51			$LEVEL_DEFAULT = 'debug';
52			$ENABLE_NAMESPACE = 1;
53			$NAMESPACE_LEVEL = undef;
54			$ENABLE_METHODS = 0;
55			$METHOD_LEVELS = [3];
56			$TRACE_STACK_LEVELS = [];
57
58	joko	1.1
59			# TODO: review, revise and rewire this!
60			#my $logger = Log::Dispatch::Config->instance;
61
62			sub __init {
63			my $self = shift;
64			my $action = shift;
65			my $message = shift;
66			#my $options = shift; # ??? or: $self->{__logger}->{options} already...?
67
68			# configure
69			if (!$self->{__logger}->{configured}) {
70			$self->{__logger}->{configured} = 1;
71			$self->_configure_LogDispatch();
72			}
73
74			# set passed-in arguments
75			$self->{__logger}->{action} = $action;
76			$self->{__logger}->{message} = $message;
77
78	joko	1.2	# trace
79			#my $tmp = caller(2);
80			#print Dumper($tmp);
81			#exit;
82
83
84			# handle caller
85
86			# determine class- and subroutinename of context calling us
87			# this task can be controlled by tuning its behaviour
88			# this can be changed by setting
89			# DesignPattern::Logger::...
90			# ...
91			# ...
92			my $calling_class;
93			my $calling_sub;
94
95
96			# Default behaviour is:
97			# Use classname from $self and suppress subroutine name.
98			# In case of using this together with DesignPattern::Bridge,
99			# the classnames of child objects are suppressed.
100			# Instead, the classname of the parent container object
101			# gets used always.
102			$calling_class = '';
103			$calling_sub = '';
104
105			# Log class names (en-/disabled, take from specified level)
106			if ($ENABLE_NAMESPACE) {
107			$calling_class = ref $self;
108			if ($NAMESPACE_LEVEL) {
109			my @entry = caller($NAMESPACE_LEVEL);
110			$calling_class = $entry[0];
111			}
112			}
113
114			# Log method names (en-/disabled, multi-level)
115			if ($ENABLE_METHODS) {
116			my @methods;
117			foreach (@{$METHOD_LEVELS}) {
118			(my $c_package, my $c_filename, my $c_line, my $c_subroutine, my $c_hasargs,
119			my $c_wantarray, my $c_evaltext, my $c_is_require, my $c_hints, my $c_bitmask) = caller($_);
120			$c_subroutine =~ s/.*:://;
121			push @methods, $c_subroutine;
122			}
123			$calling_sub = join(': ', @methods);
124			}
125
126
127
128	joko	1.1	# set default arguments
129	joko	1.2	$self->{__logger}->{classname} = $calling_class;
130			$self->{__logger}->{functionname} = $calling_sub;
131			# FIXME: deprecate this!
132	joko	1.1	$self->{__logger}->{caller} = caller;
133
134			# set default values
135			$self->{__logger}->{action} \|\|= '';
136			$self->{__logger}->{options}->{tag} \|\|= '';
137
138	joko	1.2	# FIXME: deprecate this!
139	joko	1.1	#$self->{__logger}->{level} \|\|= 'info';
140	joko	1.2	#$self->{__logger}->{level} \|\|= 'debug';
141			$self->{__logger}->{level} \|\|= $LEVEL_DEFAULT;
142
143			# handle stacktrace
144			foreach (@$TRACE_STACK_LEVELS) {
145			#print "trace-level: ", $_, "\n";
146			#(my $c_package, my $c_filename, my $c_line, my $c_subroutine, my $c_hasargs,
147			#my $c_wantarray, my $c_evaltext, my $c_is_require, my $c_hints, my $c_bitmask) = caller($_);
148			my @entry = caller($_);
149			push @{$self->{__logger}->{trace}->{stack}}, \@entry;
150			}
151	joko	1.1
152			}
153
154			sub __out {
155			my $self = shift;
156			my $message = shift;
157
158			# if message given here, append to message stored inside object
159			$self->{__logger}->{message} .= ' - ' . $message if $message;
160
161			# TODO: refactor this:
162			# - push '$self->__get_prefix()' to additional log-entry-metadata, don't show it on/in any console/logfile output
163			#$logger->log( level => $self->{__logger}->{level}, message => $self->__get_prefix_long() . $message );
164			#$logger->log( level => $self->{__logger}->{level}, message => $message );
165			#$logger->warning( __PACKAGE__ . "->_skip: '$caller' (mixed into '$classname'): ($options->{tag}) $message.");
166			#$self->{__logger}->{instance}->log( level => $self->{__logger}->{level}, message => $self->__get_prefix_short() . $self->{__logger}->{message} );
167	joko	1.2	#$self->{__logger}->{instance}->log( level => $self->{__logger}->{level}, message => $self->__get_prefix_module() . $self->{__logger}->{message} );
168			$self->{__logger}->{instance}->log( level => $self->{__logger}->{level}, message => $self->__get_prefix_best() . $self->{__logger}->{message} );
169	joko	1.1	}
170
171
172			sub __handle_options {
173			my $self = shift;
174			#my $options = shift; # ??? or: $self->{__logger}->{options} already...?
175			}
176
177			sub __get_prefix_long {
178			my $self = shift;
179			return __PACKAGE__ . "->$self->{__logger}->{action}: '$self->{__logger}->{caller}' (mixed into '$self->{__logger}->{classname}'): ($self->{__logger}->{options}->{tag}) - ";
180			}
181
182			sub __get_prefix_short {
183			my $self = shift;
184			my $tag_append = '';
185			$tag_append = "$self->{__logger}->{options}->{tag} - " if $self->{__logger}->{options}->{tag};
186			return $self->{__logger}->{classname} . "->$self->{__logger}->{action}: $tag_append";
187			}
188
189			sub __get_prefix_module {
190			my $self = shift;
191			my $tag_append = '';
192			$tag_append = "$self->{__logger}->{options}->{tag} - " if $self->{__logger}->{options}->{tag};
193			return $self->{__logger}->{classname} . ": $tag_append";
194			}
195
196
197	joko	1.2	sub __get_prefix_best {
198			my $self = shift;
199			my $namespace = $self->{__logger}->{classname};
200			my $method = '';
201			my $tag_append = '';
202			#$namespace = $namespace . ": " if $namespace;
203			$method = "->" . $self->{__logger}->{functionname} if $self->{__logger}->{functionname};
204			#$method .= ': ' if $method;
205			$tag_append = "$self->{__logger}->{options}->{tag} - " if $self->{__logger}->{options}->{tag};
206
207			my @line;
208			push @line, $namespace if $namespace;
209			push @line, $method if $method;
210			push @line, $tag_append if $tag_append;
211
212			#print Dumper(@line);
213
214			#return join(': ', @line);
215			my $result = join('', @line);
216			$result .= ': ' if $result;
217
218			return $result;
219
220			}
221
222
223	joko	1.1	sub log {
224			my $self = shift;
225			my $message = shift;
226
227			# automagically instantiate the object if not there
228			# TODO: do this by creating a dummy object inheriting from DesignPattern::Logger,
229			# for now this just don't work because which dummy one to take: Data::Code::Null?
230			#if (! ref $self) {
231			# $self = DesignPattern::Object->fromPackage('DesignPattern::Logger');
232			#}
233
234			$self->{__logger}->{level} = shift; # TODO: implement propagation of this into Log::Dispatch-object '$logger'!
235			$self->{__logger}->{options} = shift; # TODO: implement additional behaviours: e.g. { exit => 1 } would exit after tracedump
236
237			#$self->__init('log', $message);
238			$self->__init('log', $message);
239			$self->__out();
240
241			}
242
243			sub skip {
244			my $self = shift;
245			my $message = shift;
246			my $condition = shift;
247			$self->{__logger}->{level} = shift; # TODO: implement propagation of this into Log::Dispatch-object '$logger'!
248			$self->{__logger}->{options} = shift; # TODO: implement additional behaviours: e.g. { exit => 1 } would exit after tracedump
249
250			my $classname = ref $self;
251			my $caller = caller;
252
253			$self->{__logger}->{options}->{tag} \|\|= '';
254
255			if ($condition) {
256			# V1:
257			#$logger->warning( __PACKAGE__ . "->_skip: '$caller' (mixed into '$classname'): ($options->{tag}) $message.");
258			# V2:
259			$self->__init('skip', $message);
260			$self->__out();
261			return 1;
262			}
263			}
264
265			sub trace {
266			my $self = shift;
267			my $message = shift;
268			my $data = shift;
269			my $condition = shift;
270			$self->{__logger}->{level} = shift; # TODO: implement propagation of this into Log::Dispatch-object '$logger'!
271			$self->{__logger}->{options} = shift; # TODO: implement additional behaviours: e.g. { exit => 1 } would exit after tracedump
272
273			my $classname = ref $self;
274			my $caller = caller;
275
276			$self->{__logger}->{options}->{tag} \|\|= '';
277
278			# don't do _any_ tracing if disabled
279			return if $self->{TRACE_DISABLED};
280
281			# overwrite condition with local configured want-TRACE
282			$condition \|\|= $self->{TRACE};
283
284			# dump data
285			my $result = 0;
286			if ($condition) {
287			$message .= " - " . Dumper($data);
288
289			# V1:
290			# $self->__init('trace');
291			# $logger->info( __PACKAGE__ . "->trace: '$caller' (mixed into '$classname'): ($options->{tag}) $message.");
292
293			# V2:
294			$self->__init('trace', $message);
295			$self->__out();
296
297			$result = 1;
298			} else {
299			$result = 0;
300			}
301
302			# handle additional options
303			if ($self->{TRACE_OPTIONS}) {
304			exit if $self->{__logger}->{options}->{exit};
305			}
306
307			return $result;
308			}
309
310
311			sub _configure_LogDispatch {
312			my $self = shift;
313
314			my $configurator = DesignPattern::Object->fromPackage('Log::Dispatch::Configurator::Hardwired');
315
316			# FIXME?
317			my $basepath = cwd() . '/..';
318
319			# configure custom logHandler
320
321			if ($configurator) {
322
323			$configurator->{file_filename} = "$basepath/var/log/logfile.txt";
324			$configurator->{screen_min_level} = 'info';
325
326			if ($self->{quiet}) {
327			$configurator->{screen_min_level} = 8;
328			}
329
330			if ($self->{debug}) {
331			$configurator->{screen_min_level} = 'debug';
332			}
333
334			if ($self->{verbose}) {
335			$configurator->{verbose} = 1;
336			}
337
338			Log::Dispatch::Config->configure($configurator);
339			$self->{__logger}->{instance} = Log::Dispatch::Config->instance;
340
341			} else {
342
343			#Log::Dispatch::Config->configure();
344			#Log::Dispatch->configure();
345			#$self->{__logger}->{instance} = Log::Dispatch->new;
346			$self->{__logger}->{instance} = Log::Dispatch::Screen->new( name => 'screen', 'min_level' => 'debug', stderr => 1 );
347
348			}
349
350
351			}
352	joko	1.2
353			sub configure_logger {
354			my $self = shift;
355
356			# automagically instantiate the object if not there
357			# TODO: do this by creating a dummy object inheriting from DesignPattern::Logger,
358			# for now this just don't work because which dummy one to take: Data::Code::Null?
359			if (! ref $self) {
360			$self = DesignPattern::Object->fromPackage('DesignPattern::Logger');
361			}
362
363			#print "logconfig\n";
364			$self->_configure_LogDispatch();
365			}
366
367
368
369			# for standalone use
370			sub new { my $class = shift; my $self = {}; bless $self, $class; }
371
372			# convenient shortcuts
373			# FIXME: create these automagically by mungling with symbolic references
374			# or: make this object tied to recieve kinda events on method calls
375
376			sub debug {
377			my $self = shift;
378			my $message = shift;
379			$self->log($message, 'debug');
380			}
381
382			sub warning {
383			my $self = shift;
384			my $message = shift;
385			$self->log($message, 'warning');
386			}
387
388			sub info {
389			my $self = shift;
390			my $message = shift;
391			$self->log($message, 'info');
392			}
393
394			sub notice {
395			my $self = shift;
396			my $message = shift;
397			$self->log($message, 'notice');
398			}
399
400
401
402			=pod
403
404			=head1 TODO
405
406			o $TRACE_STACK_LEVELS (traces stack history)
407			o $ENABLE_DEBUG (en-/disables level 'debug')
408			o $ENABLE_LOG (en-/disables logging completely)
409
410
411			=cut
412
413	joko	1.1
414			1;
415			__END__
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