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package Egg::Exception; |
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# |
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# Masatoshi Mizuno E<lt>lusheE<64>cpan.orgE<gt> |
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# |
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# $Id: Exception.pm 337 2008-05-14 12:30:09Z lushe $ |
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# |
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use strict; |
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use warnings; |
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our $VERSION= '3.00'; |
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package Egg::Error; |
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use strict; |
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use warnings; |
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use Devel::StackTrace; |
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use overload '""' => 'stacktrace'; |
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use base qw/ Class::Accessor::Fast /; |
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our $IGNORE_PACKAGE= [qw/ main Carp /]; |
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our $IGNORE_CLASS = [qw/ Egg::Error /]; |
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__PACKAGE__->mk_accessors(qw/ errstr frames as_string /); |
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sub new { |
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my $class = shift; |
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my $errstr= join '', @_; |
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my $stacktrace; |
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{ |
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local $@; |
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eval{ |
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$stacktrace= Devel::StackTrace->new( |
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ignore_package => $IGNORE_PACKAGE, |
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ignore_class => $IGNORE_CLASS, |
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no_refs => 1, |
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respect_overload => 1, |
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); |
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}; |
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}; |
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die $errstr unless $stacktrace; |
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bless { |
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errstr => $errstr, |
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as_string=> $stacktrace->as_string, |
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frames => [$stacktrace->frames], |
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}, $class; |
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} |
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sub throw { |
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my $error= shift->new(@_); |
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die $error; |
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} |
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sub stacktrace { |
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my($self)= @_; |
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my @trace; |
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foreach my $f (@{$self->frames}) { |
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push @trace, $f->filename. ': '. $f->line; |
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} |
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"$self->{errstr} \n\n stacktrace: \n [". join("] \n [", @trace). "] \n"; |
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} |
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1; |
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__END__ |
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=head1 NAME |
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Egg::Exception - The exception with stack trace is generated. |
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=head1 SYNOPSIS |
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use Egg::Exception; |
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Egg::Error->throw('The error occurs.'); |
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or |
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local $SIG{__DIE__}= sub { Egg::Error->throw(@_) }; |
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die 'The error occurs.'; |
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=head1 DESCRIPTION |
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It is a module to vomit the message with stack trace when the exception is generated. |
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=head1 METHODS |
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=head2 new |
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Constructor. This is internally called. |
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=head2 throw ([MESSAGE_STRING]) |
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After the constructor is let pass, the exception is generated. |
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Egg::Error->throw( 'internal error.' ); |
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=head2 stacktrace |
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Only trace information on the object is returned. |
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local $SIG{__DIE__}= sub { Egg::Error->throw(@_) }; |
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eval{ ... code. }; |
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if ($@) { die $@->stacktrace } |
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=head2 frames |
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Trace information on the object is returned by the ARRAY reference. |
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local $SIG{__DIE__}= sub { Egg::Error->throw(@_) }; |
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eval{ ... code. }; |
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if ($@) { die join "\n", @{$@->frames} } |
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=head2 as_string |
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as_string of L<Devel::StackTrace > is returned. |
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local $SIG{__DIE__}= sub { Egg::Error->throw(@_) }; |
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eval{ ... code. }; |
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if ($@) { die $@->as_string } |
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=head2 errstr |
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Only the exception message of the object is returned. |
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local $SIG{__DIE__}= sub { Egg::Error->throw(@_) }; |
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eval{ ... code. }; |
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if ($@) { die $@->errstr } |
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=head1 SEE ALSO |
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L<Egg::Release>, |
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L<Devel::StackTrace>, |
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=head1 AUTHOR |
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Masatoshi Mizuno, E<lt>lusheE<64>cpan.orgE<gt> |
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=head1 COPYRIGHT AND LICENSE |
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Copyright (C) 2008 Bee Flag, Corp. E<lt>L<http://egg.bomcity.com/>E<gt>. |
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This library is free software; you can redistribute it and/or modify |
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it under the same terms as Perl itself, either Perl version 5.8.6 or, |
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at your option, any later version of Perl 5 you may have available. |
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=cut |
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