4 use base 'Catalyst::Base';
5 use UNIVERSAL::require;
8 __PACKAGE__->mk_classdata($_) for qw/engine log/;
10 our $VERSION = '5.00';
15 Catalyst - The Elegant MVC Web Application Framework
19 # use the helper to start a new application
23 # add models, views, controllers
24 script/create.pl model Something
25 script/create.pl view Stuff
26 script/create.pl controller Yada
31 # command line interface
37 use Catalyst qw/My::Module My::OtherModule/;
39 use Catalyst '-Debug';
41 use Catalyst qw/-Debug -Engine=CGI/;
43 sub default : Private { $_[1]->res->output('Hello') } );
45 sub index : Path('/index.html') {
46 my ( $self, $c ) = @_;
47 $c->res->output('Hello');
51 sub product : Regex('/^product[_]*(\d*).html$/') {
52 my ( $self, $c ) = @_;
53 $c->stash->{template} = 'product.tt';
54 $c->stash->{product} = $c->req->snippets->[0];
57 See also L<Catalyst::Manual::Intro>
61 Catalyst is based upon L<Maypole>, which you should consider for smaller
64 The key concept of Catalyst is DRY (Don't Repeat Yourself).
66 See L<Catalyst::Manual> for more documentation.
68 Catalyst plugins can be loaded by naming them as arguments to the "use Catalyst" statement.
69 Omit the C<Catalyst::Plugin::> prefix from the plugin name,
70 so C<Catalyst::Plugin::My::Module> becomes C<My::Module>.
72 use Catalyst 'My::Module';
74 Special flags like -Debug and -Engine can also be specifed as arguments when
77 use Catalyst qw/-Debug My::Module/;
79 The position of plugins and flags in the chain is important, because they are
80 loaded in exactly the order that they appear.
82 The following flags are supported:
88 enables debug output, i.e.:
90 use Catalyst '-Debug';
92 this is equivalent to:
99 Force Catalyst to use a specific engine.
100 Omit the C<Catalyst::Engine::> prefix of the engine name, i.e.:
102 use Catalyst '-Engine=CGI';
112 Overload to enable debug messages.
120 Returns a hashref containing your applications settings.
125 my ( $self, @options ) = @_;
126 my $caller = caller(0);
128 unless ( $caller->isa($self) ) {
130 push @{"$caller\::ISA"}, $self;
133 if ( $caller->engine ) {
134 return; # Catalyst is allready initialized
137 unless ( $caller->log ) {
138 $caller->log( Catalyst::Log->new );
141 if ( $ENV{CATALYST_DEBUG} || $ENV{ uc($caller) . '_DEBUG' } ) {
143 *{"$caller\::debug"} = sub { 1 };
144 $caller->log->debug('Debug messages enabled');
147 my $engine ='Catalyst::Engine::CGI';
149 if ( $ENV{MOD_PERL} ) {
153 if ( $mod_perl::VERSION >= 1.99 ) {
154 $engine ='Catalyst::Engine::Apache::MP2';
157 $engine ='Catalyst::Engine::Apache::MP1';
164 next if $caller->debug;
166 *{"$caller\::debug"} = sub { 1 };
167 $caller->log->debug('Debug messages enabled');
169 elsif (/^-Engine=(.*)$/) { $engine = "Catalyst::Engine::$1" }
170 elsif (/^-.*$/) { $caller->log->error(qq/Unknown flag "$_"/) }
172 my $plugin = "Catalyst::Plugin::$_";
174 # Plugin caller should be our application class
175 eval "package $caller; require $plugin";
177 $caller->log->error(qq/Couldn't load plugin "$plugin", "$@"/);
180 push @plugins, " $plugin";
182 push @{"$caller\::ISA"}, $plugin;
186 $caller->log->debug( 'Loaded plugins', @plugins )
187 if ( @plugins && $caller->debug );
190 $engine = "Catalyst::Engine::$ENV{CATALYST_ENGINE}"
191 if $ENV{CATALYST_ENGINE};
194 die qq/Couldn't load engine "$engine", "$@"/ if $@;
197 push @{"$caller\::ISA"}, $engine;
199 $caller->engine($engine);
200 $caller->log->debug(qq/Loaded engine "$engine"/) if $caller->debug;
205 Contains the engine class.
209 Contains the logging object. Unless it is already set Catalyst sets this up with a
210 C<Catalyst::Log> object. To use your own log class:
212 $c->log( MyLogger->new );
213 $c->log->info("now logging with my own logger!");
215 Your log class should implement the methods described in the C<Catalyst::Log>
225 Join #catalyst on irc.perl.org.
229 http://lists.rawmode.org/mailman/listinfo/catalyst
230 http://lists.rawmode.org/mailman/listinfo/catalyst-dev
234 L<Catalyst::Manual>, L<Catalyst::Test>, L<Catalyst::Request>,
235 L<Catalyst::Response>, L<Catalyst::Engine>
239 Sebastian Riedel, C<sri@oook.de>
243 Andrew Ford, Andrew Ruthven, Christian Hansen, Christopher Hicks,
244 Dan Sully, Danijel Milicevic, David Naughton, Gary Ashton Jones,
245 Jesse Sheidlower, Johan Lindstrom, Marcus Ramberg, Tatsuhiko Miyagawa
246 and all the others who've helped.
250 This library is free software . You can redistribute it and/or modify it under
251 the same terms as perl itself.