/[cvs]/nfo/perl/libs/DesignPattern/Object.pm
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revision 1.6 by joko, Tue Feb 11 11:04:27 2003 UTC revision 1.7 by joko, Tue Feb 18 18:34:35 2003 UTC
# Line 2  Line 2 
2  ##  $Id$  ##  $Id$
3  ## ---------------------------------------------------------------------------  ## ---------------------------------------------------------------------------
4  ##  $Log$  ##  $Log$
5    ##  Revision 1.7  2003/02/18 18:34:35  joko
6    ##  + fix: just logs if possible (sub log_basic)
7    ##
8  ##  Revision 1.6  2003/02/11 11:04:27  joko  ##  Revision 1.6  2003/02/11 11:04:27  joko
9  ##  + metadata (args, caller, etc.) are now stored inside {__bridge}  ##  + metadata (args, caller, etc.) are now stored inside {__bridge}
10  ##  ##
# Line 34  use Data::Dumper; Line 37  use Data::Dumper;
37  #use Devel::StackTrace;  #use Devel::StackTrace;
38    
39    
40  # get logger instance  my $_dp_globals;
41  my $logger = eval { Log::Dispatch::Config->instance; };  
42    $_dp_globals = {
43      TRACE => 0,
44    };
45    
46    
47  sub new {  sub new {
48        
# Line 45  sub new { Line 52  sub new {
52    # use already blessed reference, if passed in - else use the very classname    # use already blessed reference, if passed in - else use the very classname
53    my $class = ref ($classname) || $classname;    my $class = ref ($classname) || $classname;
54        
55    $logger->debug( "$classname->new( ... )" . "\t[via " . __PACKAGE__ . "]" ) if $logger;    #$self->log_basic( "$classname->new( ... )" . "\t[via " . __PACKAGE__ . "]" , 'debug');
56        
57    # the base for our object - a plain perl hash, which ....    # the base for our object - a plain perl hash, which ....
58    my $self = {};    my $self = {};
# Line 60  sub new { Line 67  sub new {
67    # TODO: what about logging in here? inherit from    # TODO: what about logging in here? inherit from
68    # DesignPattern::Object::Logger for this purpose....    # DesignPattern::Object::Logger for this purpose....
69    # ... or would this give us (harmful) circular module dependencies???    # ... or would this give us (harmful) circular module dependencies???
70    #$logger->debug( __PACKAGE__ . "->new( @args )" );      # this is not "common"!    #$self->log_basic( __PACKAGE__ . "->new( @args )", 'debug' );      # this is not "common"!
71    
72            
73    # remember the stacktrace: abstract this out (DesignPattern::Object::Trace) or parametrize!    # remember the stacktrace: abstract this out (DesignPattern::Object::Trace) or parametrize!
# Line 130  sub _abstract_function { Line 137  sub _abstract_function {
137    my $self_classname = ref $self;    my $self_classname = ref $self;
138    my $function_name = shift;    my $function_name = shift;
139    # was:    # was:
140    $logger->warning( __PACKAGE__ . ": function '$function_name' is an abstract method, please implement it in '$self_classname'.");    $self->log_basic( __PACKAGE__ . ": function '$function_name' is an abstract method, please implement it in '$self_classname'.", 'warning');
141    # is:    # is:
142    #die( __PACKAGE__ . ": Function '$function_name' is an abstract method, please implement it in '$self_classname'.");    #die( __PACKAGE__ . ": Function '$function_name' is an abstract method, please implement it in '$self_classname'.");
143    #exit;    #exit;
# Line 147  sub fromPackage { Line 154  sub fromPackage {
154    
155  #print Dumper($args);  #print Dumper($args);
156    
157    $logger->debug( __PACKAGE__ . "->fromPackage( pkgname $pkgname args @args )" );    $self->log_basic( __PACKAGE__ . "->fromPackage( pkgname $pkgname args @args )", 'debug');
158        
159    # perl-load    # perl-load
160      my $evstring = "use $pkgname;";      my $evstring = "use $pkgname;";
# Line 160  sub fromPackage { Line 167  sub fromPackage {
167        #my $classname = $self->{__classname};        #my $classname = $self->{__classname};
168        my $errmsg_critical = '';        my $errmsg_critical = '';
169        if ($errmsg_native =~ m/Can't locate (.+?) in \@INC/) {        if ($errmsg_native =~ m/Can't locate (.+?) in \@INC/) {
170          $errmsg_critical = "Could not instantiate object from package '$pkgname' - location of '$1' failed.";          $errmsg_critical = "Could not instantiate object from package '$pkgname' ('$1' not found).";
171        } else {        } else {
172          $errmsg_critical = $errmsg_native;          $errmsg_critical = $errmsg_native;
173        }        }
174        # write error to logging-output (console|file|database)        # write error to logging-output (console|file|database)
175        $logger->debug( $errmsg_native );        $self->log_basic( $errmsg_native, 'debug' );
176        $logger->critical( $errmsg_critical );        $self->log_basic( $errmsg_critical, 'warning' );
177        return;        return;
178      }      }
179        
# Line 180  sub fromPackage { Line 187  sub fromPackage {
187    return $object;    return $object;
188  }  }
189    
190    sub log_basic {
191      my $self = shift;
192      my $message = shift;
193      my $level = shift;
194    
195      if ($_dp_globals->{TRACE} || ($level && $level =~ /warning|error|critical/)) {
196        print $level, ": ", $message, "\n";
197      }
198    
199      # get logger instance
200      if (!$_dp_globals->{logger}) {
201        $_dp_globals->{logger} = eval { Log::Dispatch::Config->instance; };
202      }
203      
204      if ($_dp_globals->{logger}) {
205        $_dp_globals->{logger}->log($level, $message);
206      #} else {
207        #print $level, ": ", $message, "\n";
208      }
209      
210    }
211    
212  1;  1;
213    __END__
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