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## ------------------------------------------------------------------------ |
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## $Id: Logger.pm,v 1.5 2003/05/13 08:40:15 joko Exp $ |
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## ------------------------------------------------------------------------ |
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## $Log: Logger.pm,v $ |
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## Revision 1.5 2003/05/13 08:40:15 joko |
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## minor update: renamed attribute |
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## |
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## Revision 1.4 2003/03/29 07:16:00 joko |
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## minor update: changed default log-file-name to 'perl_app.log' |
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## |
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## Revision 1.3 2003/03/28 07:23:25 joko |
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## fix to basepath calculation |
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## |
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## Revision 1.2 2003/02/20 21:06:27 joko |
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## + configurable by package globals |
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## + standalone mode (object creation via 'new') |
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## + some comments |
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## + Log::Dispatch gets configured inside here now |
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## + coordinated stack tracing |
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## + convenient shortcut methods resembling the syslog levels |
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## |
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## Revision 1.1 2003/02/19 00:34:52 joko |
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## + initial commit, again refactored to this place |
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## |
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## Revision 1.3 2003/02/18 18:33:59 joko |
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## + fix: just logs if possible |
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## |
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## Revision 1.2 2003/02/18 16:37:22 joko |
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## + fix: ...::Hardwired is an optional module |
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## |
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## Revision 1.1 2003/02/18 15:57:34 joko |
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## + initial commit, refactored from DesignPattern::Object::Logger |
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## |
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## Revision 1.2 2003/02/14 14:20:42 joko |
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## + decreased default log-level to debug |
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## |
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## Revision 1.1 2002/12/22 14:17:38 joko |
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## + initial check-in, refactored |
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## |
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## Revision 1.1 2002/12/19 01:14:48 cvsjoko |
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## + initial check-in |
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## |
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## ------------------------------------------------------------------------ |
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|
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|
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=pod |
| 47 |
|
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This is weird! Forget it. |
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But we depend on it! |
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Hmmm.... |
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|
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|
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=cut |
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|
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|
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package DesignPattern::Logger; |
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|
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use strict; |
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use warnings; |
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|
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use Data::Dumper; |
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use Log::Dispatch; |
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use Log::Dispatch::Screen; |
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use Log::Dispatch::Config; |
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use Cwd; |
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use DesignPattern::Object; |
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|
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use vars qw( |
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$LEVEL_DEFAULT |
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$ENABLE_NAMESPACE |
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$NAMESPACE_LEVEL |
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$ENABLE_METHODS |
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$METHOD_LEVELS |
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$TRACE_STACK_LEVELS |
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); |
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|
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# default behaviour |
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$LEVEL_DEFAULT = 'debug'; |
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$ENABLE_NAMESPACE = 1; |
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$NAMESPACE_LEVEL = undef; |
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$ENABLE_METHODS = 0; |
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$METHOD_LEVELS = [3]; |
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$TRACE_STACK_LEVELS = []; |
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|
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|
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# TODO: review, revise and rewire this! |
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#my $logger = Log::Dispatch::Config->instance; |
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|
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sub __init { |
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my $self = shift; |
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my $action = shift; |
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my $message = shift; |
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#my $options = shift; # ??? or: $self->{__logger}->{options} already...? |
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|
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# configure |
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if (!$self->{__logger}->{configured}) { |
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$self->{__logger}->{configured} = 1; |
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$self->_configure_LogDispatch(); |
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} |
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|
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# set passed-in arguments |
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$self->{__logger}->{action} = $action; |
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$self->{__logger}->{message} = $message; |
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|
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# trace |
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#my $tmp = caller(2); |
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#print Dumper($tmp); |
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#exit; |
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|
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|
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# handle caller |
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|
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# determine class- and subroutinename of context calling us |
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# this task can be controlled by tuning its behaviour |
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# this can be changed by setting |
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# DesignPattern::Logger::... |
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# ... |
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# ... |
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my $calling_class; |
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my $calling_sub; |
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|
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|
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# Default behaviour is: |
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# Use classname from $self and suppress subroutine name. |
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# In case of using this together with DesignPattern::Bridge, |
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# the classnames of child objects are suppressed. |
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# Instead, the classname of the parent container object |
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# gets used *always*. |
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$calling_class = ''; |
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$calling_sub = ''; |
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|
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# Log class names (en-/disabled, take from specified level) |
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if ($ENABLE_NAMESPACE) { |
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$calling_class = ref $self; |
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if ($NAMESPACE_LEVEL) { |
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my @entry = caller($NAMESPACE_LEVEL); |
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$calling_class = $entry[0]; |
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} |
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} |
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|
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# Log method names (en-/disabled, multi-level) |
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if ($ENABLE_METHODS) { |
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my @methods; |
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foreach (@{$METHOD_LEVELS}) { |
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(my $c_package, my $c_filename, my $c_line, my $c_subroutine, my $c_hasargs, |
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my $c_wantarray, my $c_evaltext, my $c_is_require, my $c_hints, my $c_bitmask) = caller($_); |
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$c_subroutine ||= ''; |
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$c_subroutine =~ s/.*:://; |
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push @methods, $c_subroutine; |
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} |
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$calling_sub = join(': ', @methods) if @methods; |
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} |
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|
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|
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|
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# set default arguments |
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$self->{__logger}->{classname} = $calling_class; |
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$self->{__logger}->{functionname} = $calling_sub; |
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# FIXME: deprecate this! |
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$self->{__logger}->{caller} = caller; |
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|
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# set default values |
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$self->{__logger}->{action} ||= ''; |
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$self->{__logger}->{options}->{tag} ||= ''; |
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|
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# FIXME: deprecate this! |
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#$self->{__logger}->{level} ||= 'info'; |
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#$self->{__logger}->{level} ||= 'debug'; |
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$self->{__logger}->{level} ||= $LEVEL_DEFAULT; |
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|
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# handle stacktrace |
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foreach (@$TRACE_STACK_LEVELS) { |
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#print "trace-level: ", $_, "\n"; |
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#(my $c_package, my $c_filename, my $c_line, my $c_subroutine, my $c_hasargs, |
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#my $c_wantarray, my $c_evaltext, my $c_is_require, my $c_hints, my $c_bitmask) = caller($_); |
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my @entry = caller($_); |
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push @{$self->{__logger}->{trace}->{stack}}, \@entry; |
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} |
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|
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} |
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|
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sub __out { |
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my $self = shift; |
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my $message = shift; |
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|
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# if message given here, append to message stored inside object |
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$self->{__logger}->{message} .= ' - ' . $message if $message; |
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|
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# TODO: refactor this: |
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# - push '$self->__get_prefix()' to additional log-entry-metadata, don't show it on/in any console/logfile output |
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#$logger->log( level => $self->{__logger}->{level}, message => $self->__get_prefix_long() . $message ); |
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#$logger->log( level => $self->{__logger}->{level}, message => $message ); |
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#$logger->warning( __PACKAGE__ . "->_skip: '$caller' (mixed into '$classname'): ($options->{tag}) $message."); |
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#$self->{__logger}->{instance}->log( level => $self->{__logger}->{level}, message => $self->__get_prefix_short() . $self->{__logger}->{message} ); |
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#$self->{__logger}->{instance}->log( level => $self->{__logger}->{level}, message => $self->__get_prefix_module() . $self->{__logger}->{message} ); |
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$self->{__logger}->{instance}->log( level => $self->{__logger}->{level}, message => $self->__get_prefix_best() . $self->{__logger}->{message} ); |
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} |
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|
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|
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sub __handle_options { |
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my $self = shift; |
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#my $options = shift; # ??? or: $self->{__logger}->{options} already...? |
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} |
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|
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sub __get_prefix_long { |
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my $self = shift; |
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return __PACKAGE__ . "->$self->{__logger}->{action}: '$self->{__logger}->{caller}' (mixed into '$self->{__logger}->{classname}'): ($self->{__logger}->{options}->{tag}) - "; |
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} |
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|
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sub __get_prefix_short { |
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my $self = shift; |
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my $tag_append = ''; |
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$tag_append = "$self->{__logger}->{options}->{tag} - " if $self->{__logger}->{options}->{tag}; |
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return $self->{__logger}->{classname} . "->$self->{__logger}->{action}: $tag_append"; |
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} |
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|
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sub __get_prefix_module { |
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my $self = shift; |
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my $tag_append = ''; |
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$tag_append = "$self->{__logger}->{options}->{tag} - " if $self->{__logger}->{options}->{tag}; |
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return $self->{__logger}->{classname} . ": $tag_append"; |
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} |
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|
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|
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sub __get_prefix_best { |
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my $self = shift; |
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my $namespace = $self->{__logger}->{classname}; |
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my $method = ''; |
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my $tag_append = ''; |
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#$namespace = $namespace . ": " if $namespace; |
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$method = "->" . $self->{__logger}->{functionname} if $self->{__logger}->{functionname}; |
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#$method .= ': ' if $method; |
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$tag_append = "$self->{__logger}->{options}->{tag} - " if $self->{__logger}->{options}->{tag}; |
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|
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my @line; |
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push @line, $namespace if $namespace; |
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push @line, $method if $method; |
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push @line, $tag_append if $tag_append; |
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|
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#print Dumper(@line); |
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|
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#return join(': ', @line); |
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my $result = join('', @line); |
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$result .= ': ' if $result; |
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|
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return $result; |
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|
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} |
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|
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|
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sub log { |
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my $self = shift; |
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my $message = shift; |
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|
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# automagically instantiate the object if not there |
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# TODO: do this by creating a dummy object inheriting from DesignPattern::Logger, |
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# for now this just don't work because which dummy one to take: Data::Code::Null? |
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#if (! ref $self) { |
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# $self = DesignPattern::Object->fromPackage('DesignPattern::Logger'); |
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#} |
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|
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$self->{__logger}->{level} = shift; # TODO: implement propagation of this into Log::Dispatch-object '$logger'! |
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$self->{__logger}->{options} = shift; # TODO: implement additional behaviours: e.g. { exit => 1 } would exit after tracedump |
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|
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#$self->__init('log', $message); |
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$self->__init('log', $message); |
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$self->__out(); |
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|
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} |
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|
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sub skip { |
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my $self = shift; |
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my $message = shift; |
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my $condition = shift; |
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$self->{__logger}->{level} = shift; # TODO: implement propagation of this into Log::Dispatch-object '$logger'! |
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$self->{__logger}->{options} = shift; # TODO: implement additional behaviours: e.g. { exit => 1 } would exit after tracedump |
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|
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my $classname = ref $self; |
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my $caller = caller; |
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|
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$self->{__logger}->{options}->{tag} ||= ''; |
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|
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if ($condition) { |
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# V1: |
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#$logger->warning( __PACKAGE__ . "->_skip: '$caller' (mixed into '$classname'): ($options->{tag}) $message."); |
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# V2: |
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$self->__init('skip', $message); |
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$self->__out(); |
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return 1; |
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} |
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} |
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|
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sub trace { |
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my $self = shift; |
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my $message = shift; |
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my $data = shift; |
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my $condition = shift; |
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$self->{__logger}->{level} = shift; # TODO: implement propagation of this into Log::Dispatch-object '$logger'! |
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$self->{__logger}->{options} = shift; # TODO: implement additional behaviours: e.g. { exit => 1 } would exit after tracedump |
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|
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my $classname = ref $self; |
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my $caller = caller; |
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|
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$self->{__logger}->{options}->{tag} ||= ''; |
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|
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# don't do _any_ tracing if disabled |
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return if $self->{TRACE_DISABLED}; |
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|
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# overwrite condition with local configured want-TRACE |
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$condition ||= $self->{TRACE}; |
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|
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# dump data |
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my $result = 0; |
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if ($condition) { |
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$message .= " - " . Dumper($data); |
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|
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# V1: |
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# $self->__init('trace'); |
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# $logger->info( __PACKAGE__ . "->trace: '$caller' (mixed into '$classname'): ($options->{tag}) $message."); |
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|
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# V2: |
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$self->__init('trace', $message); |
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$self->__out(); |
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|
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$result = 1; |
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} else { |
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$result = 0; |
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} |
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|
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# handle additional options |
| 331 |
if ($self->{TRACE_OPTIONS}) { |
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exit if $self->{__logger}->{options}->{exit}; |
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} |
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|
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return $result; |
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} |
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|
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|
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sub _configure_LogDispatch { |
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my $self = shift; |
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|
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my $configurator = DesignPattern::Object->fromPackage('Log::Dispatch::Configurator::Hardwired'); |
| 343 |
|
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# check if running inside a 'PROJECT' space |
| 345 |
my $basepath = cwd(); |
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my $postpone = '/..'; |
| 347 |
if (-d $basepath . $postpone . '/PROJECT') { |
| 348 |
$basepath .= $postpone; |
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$basepath .= "/var/log"; |
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} |
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|
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# configure custom logHandler |
| 353 |
|
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if ($configurator) { |
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|
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$configurator->{file_filename} = "$basepath/perl_app.log"; |
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$configurator->{screen_min_level} = 'info'; |
| 358 |
|
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if ($self->{quiet}) { |
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$configurator->{screen_min_level} = 8; |
| 361 |
} |
| 362 |
|
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if ($self->{debug}) { |
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$configurator->{screen_min_level} = 'debug'; |
| 365 |
} |
| 366 |
|
| 367 |
if ($self->{LOG_VERBOSE}) { |
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$configurator->{verbose} = 1; |
| 369 |
} |
| 370 |
|
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Log::Dispatch::Config->configure($configurator); |
| 372 |
$self->{__logger}->{instance} = Log::Dispatch::Config->instance; |
| 373 |
|
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} else { |
| 375 |
|
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#Log::Dispatch::Config->configure(); |
| 377 |
#Log::Dispatch->configure(); |
| 378 |
#$self->{__logger}->{instance} = Log::Dispatch->new; |
| 379 |
$self->{__logger}->{instance} = Log::Dispatch::Screen->new( name => 'screen', 'min_level' => 'debug', stderr => 1 ); |
| 380 |
|
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} |
| 382 |
|
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|
| 384 |
} |
| 385 |
|
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sub configure_logger { |
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my $self = shift; |
| 388 |
|
| 389 |
# automagically instantiate the object if not there |
| 390 |
# TODO: do this by creating a dummy object inheriting from DesignPattern::Logger, |
| 391 |
# for now this just don't work because which dummy one to take: Data::Code::Null? |
| 392 |
if (! ref $self) { |
| 393 |
$self = DesignPattern::Object->fromPackage('DesignPattern::Logger'); |
| 394 |
} |
| 395 |
|
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#print "logconfig\n"; |
| 397 |
$self->_configure_LogDispatch(); |
| 398 |
} |
| 399 |
|
| 400 |
|
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|
| 402 |
# for standalone use |
| 403 |
sub new { my $class = shift; my $self = {}; bless $self, $class; } |
| 404 |
|
| 405 |
# convenient shortcuts |
| 406 |
# FIXME: create these automagically by mungling with symbolic references |
| 407 |
# or: make this object tied to recieve kinda events on method calls |
| 408 |
|
| 409 |
sub debug { |
| 410 |
my $self = shift; |
| 411 |
my $message = shift; |
| 412 |
$self->log($message, 'debug'); |
| 413 |
} |
| 414 |
|
| 415 |
sub warning { |
| 416 |
my $self = shift; |
| 417 |
my $message = shift; |
| 418 |
$self->log($message, 'warning'); |
| 419 |
} |
| 420 |
|
| 421 |
sub info { |
| 422 |
my $self = shift; |
| 423 |
my $message = shift; |
| 424 |
$self->log($message, 'info'); |
| 425 |
} |
| 426 |
|
| 427 |
sub notice { |
| 428 |
my $self = shift; |
| 429 |
my $message = shift; |
| 430 |
$self->log($message, 'notice'); |
| 431 |
} |
| 432 |
|
| 433 |
|
| 434 |
|
| 435 |
=pod |
| 436 |
|
| 437 |
=head1 TODO |
| 438 |
|
| 439 |
o $TRACE_STACK_LEVELS (traces stack history) |
| 440 |
o $ENABLE_DEBUG (en-/disables level 'debug') |
| 441 |
o $ENABLE_LOG (en-/disables logging completely) |
| 442 |
|
| 443 |
|
| 444 |
=cut |
| 445 |
|
| 446 |
|
| 447 |
1; |
| 448 |
__END__ |
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