Commit | Line | Data |
c28ee69c |
1 | #!/usr/bin/perl |
2 | |
3 | package Catalyst::Plugin::Cache; |
303b9f5c |
4 | use base qw(Class::Accessor::Fast Class::Data::Inheritable); |
c28ee69c |
5 | |
6 | use strict; |
7 | use warnings; |
8 | |
204b2b54 |
9 | our $VERSION = "0.05"; |
d6861a7f |
10 | |
c28ee69c |
11 | use Scalar::Util (); |
23b2d59b |
12 | use Catalyst::Utils (); |
c28ee69c |
13 | use Carp (); |
14 | use NEXT; |
15 | |
2e4bde89 |
16 | use Catalyst::Plugin::Cache::Curried; |
17 | |
c28ee69c |
18 | __PACKAGE__->mk_classdata( "_cache_backends" ); |
2e4bde89 |
19 | __PACKAGE__->mk_accessors( "_default_curried_cache" ); |
c28ee69c |
20 | |
21 | sub setup { |
22 | my $app = shift; |
23 | |
24 | # set it once per app, not once per plugin, |
25 | # and don't overwrite if some plugin was wicked |
26 | $app->_cache_backends({}) unless $app->_cache_backends; |
27 | |
28 | my $ret = $app->NEXT::setup( @_ ); |
29 | |
30 | $app->setup_cache_backends; |
31 | |
32 | $ret; |
33 | } |
34 | |
23b2d59b |
35 | sub get_default_cache_backend_config { |
36 | my ( $app, $name ) = @_; |
37 | $app->config->{cache}{backend} || $app->get_cache_backend_config("default"); |
38 | } |
39 | |
40 | sub get_cache_backend_config { |
41 | my ( $app, $name ) = @_; |
42 | $app->config->{cache}{backends}{$name}; |
43 | } |
44 | |
45 | sub setup_cache_backends { |
46 | my $app = shift; |
47 | |
48 | # give plugins a chance to find things for themselves |
49 | $app->NEXT::setup_cache_backends; |
50 | |
51 | foreach my $name ( keys %{ $app->config->{cache}{backends} } ) { |
52 | next if $app->get_cache_backend( $name ); |
53 | $app->setup_generic_cache_backend( $name, $app->get_cache_backend_config( $name ) || {} ); |
54 | } |
55 | |
33002c69 |
56 | if ( !$app->get_cache_backend("default") ) { |
57 | local $@; |
58 | eval { $app->setup_generic_cache_backend( default => $app->get_default_cache_backend_config || {} ) }; |
85a748b9 |
59 | } |
23b2d59b |
60 | } |
61 | |
62 | sub default_cache_store { |
63 | my $app = shift; |
64 | $app->config->{cache}{default_store} || $app->guess_default_cache_store; |
65 | } |
66 | |
67 | sub guess_default_cache_store { |
68 | my $app = shift; |
69 | |
70 | my @stores = map { /Cache::Store::(.*)$/ ? $1 : () } $app->registered_plugins; |
71 | |
72 | if ( @stores == 1 ) { |
73 | return $stores[0]; |
74 | } else { |
75 | Carp::croak "You must configure a default store type unless you use exactly one store plugin."; |
76 | } |
77 | } |
78 | |
79 | sub setup_generic_cache_backend { |
80 | my ( $app, $name, $config ) = @_; |
81 | my %config = %$config; |
82 | |
83 | if ( my $class = delete $config{class} ) { |
22954d19 |
84 | eval { $app->setup_cache_backend_by_class( $name, $class, %config ) } |
85 | || |
86 | eval { $app->setup_cache_backend_by_class( $name, $class, \%config ) } |
87 | || |
88 | die "Couldn't construct $class with either list style or hash ref style param passing: $@"; |
23b2d59b |
89 | } elsif ( my $store = delete $config->{store} || $app->default_cache_store ) { |
90 | my $method = lc("setup_${store}_cache_backend"); |
91 | |
92 | Carp::croak "You must load the $store cache store plugin (if it exists). ". |
93 | "Please consult the Catalyst::Plugin::Cache documentation on how to configure hetrogeneous stores." |
94 | unless $app->can($method); |
95 | |
887cc08f |
96 | $app->$method( $name, \%config ); |
23b2d59b |
97 | } else { |
98 | $app->log->warn("Couldn't setup the cache backend named '$name'"); |
99 | } |
100 | } |
101 | |
102 | sub setup_cache_backend_by_class { |
103 | my ( $app, $name, $class, @args ) = @_; |
104 | Catalyst::Utils::ensure_class_loaded( $class ); |
105 | $app->register_cache_backend( $name => $class->new( @args ) ); |
106 | } |
107 | |
108 | # end of spaghetti setup DWIM |
c28ee69c |
109 | |
110 | sub cache { |
2e4bde89 |
111 | my ( $c, @meta ) = @_; |
112 | |
113 | if ( @meta == 1 ) { |
114 | my $name = $meta[0]; |
115 | return ( $c->get_preset_curried($name) || $c->get_cache_backend($name) ); |
116 | } elsif ( !@meta ) { |
117 | # be nice and always return the same one for the simplest case |
118 | return ( $c->_default_curried_cache || $c->_default_curried_cache( $c->curry_cache( @meta ) ) ); |
c28ee69c |
119 | } else { |
2e4bde89 |
120 | return $c->curry_cache( @meta ); |
c28ee69c |
121 | } |
122 | } |
123 | |
5a00a29b |
124 | sub construct_curried_cache { |
125 | my ( $c, @meta ) = @_; |
126 | return $c->curried_cache_class( @meta )->new( @meta ); |
127 | } |
128 | |
129 | sub curried_cache_class { |
130 | my ( $c, @meta ) = @_; |
131 | $c->config->{cache}{curried_class} || "Catalyst::Plugin::Cache::Curried"; |
132 | } |
133 | |
2e4bde89 |
134 | sub curry_cache { |
135 | my ( $c, @meta ) = @_; |
5a00a29b |
136 | return $c->construct_curried_cache( $c, $c->_cache_caller_meta, @meta ); |
2e4bde89 |
137 | } |
138 | |
139 | sub get_preset_curried { |
140 | my ( $c, $name ) = @_; |
141 | |
142 | if ( ref( my $preset = $c->config->{cache}{profiles}{$name} ) ) { |
143 | return $preset if Scalar::Util::blessed($preset); |
144 | |
145 | my @meta = ( ( ref $preset eq "HASH" ) ? %$preset : @$preset ); |
146 | return $c->curry_cache( @meta ); |
147 | } |
148 | |
149 | return; |
150 | } |
151 | |
c28ee69c |
152 | sub get_cache_backend { |
153 | my ( $c, $name ) = @_; |
154 | $c->_cache_backends->{$name}; |
155 | } |
156 | |
157 | sub register_cache_backend { |
158 | my ( $c, $name, $backend ) = @_; |
159 | |
160 | no warnings 'uninitialized'; |
161 | Carp::croak("$backend does not look like a cache backend - " |
aed484da |
162 | . "it must be an object supporting get, set and remove") |
163 | unless eval { $backend->can("get") && $backend->can("set") && $backend->can("remove") }; |
c28ee69c |
164 | |
165 | $c->_cache_backends->{$name} = $backend; |
166 | } |
167 | |
168 | sub unregister_cache_backend { |
169 | my ( $c, $name ) = @_; |
170 | delete $c->_cache_backends->{$name}; |
171 | } |
172 | |
173 | sub default_cache_backend { |
174 | my $c = shift; |
175 | $c->get_cache_backend( "default" ) || $c->temporary_cache_backend; |
176 | } |
177 | |
178 | sub temporary_cache_backend { |
179 | my $c = shift; |
180 | die "FIXME - make up an in memory cache backend, that hopefully works well for the current engine"; |
181 | } |
182 | |
5a00a29b |
183 | sub _cache_caller_meta { |
184 | my $c = shift; |
185 | |
186 | my ( $caller, $component, $controller ); |
187 | |
188 | for my $i ( 0 .. 15 ) { # don't look to far |
189 | my @info = caller(2 + $i) or last; |
190 | |
85a748b9 |
191 | $caller ||= \@info unless $info[0] =~ /Plugin::Cache/; |
5a00a29b |
192 | $component ||= \@info if $info[0]->isa("Catalyst::Component"); |
193 | $controller ||= \@info if $info[0]->isa("Catalyst::Controller"); |
194 | |
195 | last if $caller && $component && $controller; |
196 | } |
197 | |
85a748b9 |
198 | my ( $caller_pkg, $component_pkg, $controller_pkg ) = |
199 | map { $_ ? $_->[0] : undef } $caller, $component, $controller; |
200 | |
5a00a29b |
201 | return ( |
85a748b9 |
202 | 'caller' => $caller_pkg, |
203 | component => $component_pkg, |
204 | controller => $controller_pkg, |
205 | caller_frame => $caller, |
206 | component_frame => $component, |
207 | controller_frame => $controller, |
5a00a29b |
208 | ); |
209 | } |
210 | |
c28ee69c |
211 | # this gets a shit name so that the plugins can override a good name |
212 | sub choose_cache_backend_wrapper { |
213 | my ( $c, @meta ) = @_; |
214 | |
c627df81 |
215 | Carp::croak("metadata must be an even sized list") unless @meta % 2 == 0; |
c28ee69c |
216 | |
217 | my %meta = @meta; |
5a00a29b |
218 | |
219 | unless ( exists $meta{'caller'} ) { |
220 | my %caller = $c->_cache_caller_meta; |
221 | @meta{keys %caller} = values %caller; |
222 | } |
c28ee69c |
223 | |
224 | # allow the cache client to specify who it wants to cache with (but loeave room for a hook) |
225 | if ( exists $meta{backend} ) { |
226 | if ( Scalar::Util::blessed($meta{backend}) ) { |
227 | return $meta{backend}; |
228 | } else { |
229 | return $c->get_cache_backend( $meta{backend} ) || $c->default_cache_backend; |
230 | } |
231 | }; |
232 | |
c28ee69c |
233 | if ( my $chosen = $c->choose_cache_backend( %meta ) ) { |
234 | $chosen = $c->get_cache_backend( $chosen ) unless Scalar::Util::blessed($chosen); # if it's a name find it |
235 | return $chosen if Scalar::Util::blessed($chosen); # only return if it was an object or name lookup worked |
236 | |
237 | # FIXME |
238 | # die "no such backend"? |
239 | # currently, we fall back to default |
240 | } |
241 | |
242 | return $c->default_cache_backend; |
243 | } |
244 | |
245 | sub choose_cache_backend { shift->NEXT::choose_cache_backend( @_ ) } # a convenient fallback |
246 | |
247 | sub cache_set { |
390db05f |
248 | my ( $c, $key, $value, %meta ) = @_; |
249 | $c->choose_cache_backend_wrapper( key => $key, value => $value, %meta ) |
250 | ->set( $key, $value, exists $meta{expires} ? $meta{expires} : () ); |
c28ee69c |
251 | } |
252 | |
253 | sub cache_get { |
254 | my ( $c, $key, @meta ) = @_; |
255 | $c->choose_cache_backend_wrapper( key => $key, @meta )->get( $key ); |
256 | } |
257 | |
aed484da |
258 | sub cache_remove { |
c28ee69c |
259 | my ( $c, $key, @meta ) = @_; |
aed484da |
260 | $c->choose_cache_backend_wrapper( key => $key, @meta )->remove( $key ); |
c28ee69c |
261 | } |
262 | |
263 | __PACKAGE__; |
264 | |
265 | __END__ |
266 | |
267 | =pod |
268 | |
269 | =head1 NAME |
270 | |
85a748b9 |
271 | Catalyst::Plugin::Cache - Flexible caching support for Catalyst. |
c28ee69c |
272 | |
273 | =head1 SYNOPSIS |
274 | |
5a00a29b |
275 | use Catalyst qw/ |
276 | Cache |
277 | /; |
278 | |
279 | # configure a backend or use a store plugin |
85a748b9 |
280 | __PACKAGE__->config->{cache}{backend} = { |
281 | class => "Cache::Bounded", |
282 | # ... params ... |
283 | }; |
5a00a29b |
284 | |
c627df81 |
285 | # In a controller: |
5a00a29b |
286 | |
287 | sub foo : Local { |
288 | my ( $self, $c, $id ) = @_; |
289 | |
290 | my $cache = $c->cache; |
291 | |
292 | my $result; |
293 | |
294 | unless ( $result = $cache->get( $id ) ) { |
c627df81 |
295 | # ... calculate result ... |
5a00a29b |
296 | $c->cache->set( $id, $result ); |
297 | } |
298 | }; |
c28ee69c |
299 | |
300 | =head1 DESCRIPTION |
301 | |
c627df81 |
302 | This plugin gives you access to a variety of systems for caching |
303 | data. It allows you to use a very simple configuration API, while |
304 | maintaining the possibility of flexibility when you need it later. |
5a00a29b |
305 | |
c627df81 |
306 | Among its features are support for multiple backends, segmentation based |
307 | on component or controller, keyspace partitioning, and so more, in |
308 | various subsidiary plugins. |
5a00a29b |
309 | |
85a748b9 |
310 | =head1 METHODS |
311 | |
312 | =over 4 |
313 | |
314 | =item cache $profile_name |
315 | |
316 | =item cache %meta |
317 | |
c627df81 |
318 | Return a curried object with metadata from C<$profile_name> or as |
319 | explicitly specified. |
85a748b9 |
320 | |
c627df81 |
321 | If a profile by the name C<$profile_name> doesn't exist, but a backend |
322 | object by that name does exist, the backend will be returned instead, |
323 | since the interface for curried caches and backends is almost identical. |
85a748b9 |
324 | |
c627df81 |
325 | This method can also be called without arguments, in which case is |
326 | treated as though the C<%meta> hash was empty. |
85a748b9 |
327 | |
c627df81 |
328 | See L</METADATA> for details. |
85a748b9 |
329 | |
330 | =item curry_cache %meta |
331 | |
c627df81 |
332 | Return a L<Catalyst::Plugin::Cache::Curried> object, curried with C<%meta>. |
85a748b9 |
333 | |
c627df81 |
334 | See L</METADATA> for details. |
85a748b9 |
335 | |
336 | =item cache_set $key, $value, %meta |
337 | |
338 | =item cache_get $key, %meta |
339 | |
340 | =item cache_remove $key, %meta |
341 | |
c627df81 |
342 | These cache operations will call L<choose_cache_backend> with %meta, and |
343 | then call C<set>, C<get>, or C<remove> on the resulting backend object. |
85a748b9 |
344 | |
345 | =item choose_cache_backend %meta |
346 | |
c627df81 |
347 | Select a backend object. This should return undef if no specific backend |
348 | was selected - its caller will handle getting C<default_cache_backend> |
349 | on its own. |
85a748b9 |
350 | |
351 | This method is typically used by plugins. |
352 | |
353 | =item get_cache_backend $name |
354 | |
355 | Get a backend object by name. |
356 | |
357 | =item default_cache_backend |
358 | |
359 | Return the default backend object. |
360 | |
361 | =item temporary_cache_backend |
362 | |
c627df81 |
363 | When no default cache backend is configured this method might return a |
364 | backend known to work well with the current L<Catalyst::Engine>. This is |
365 | a stub. |
85a748b9 |
366 | |
367 | =item |
368 | |
369 | =back |
370 | |
c627df81 |
371 | =head1 METADATA |
85a748b9 |
372 | |
373 | =head2 Introduction |
374 | |
c627df81 |
375 | Whenever you set or retrieve a key you may specify additional metadata |
376 | that will be used to select a specific backend. |
85a748b9 |
377 | |
378 | This metadata is very freeform, and the only key that has any meaning by |
379 | default is the C<backend> key which can be used to explicitly choose a backend |
380 | by name. |
381 | |
c627df81 |
382 | The C<choose_cache_backend> method can be overridden in order to |
383 | facilitate more intelligent backend selection. For example, |
384 | L<Catalyst::Plugin::Cache::Choose::KeyRegexes> overrides that method to |
385 | select a backend based on key regexes. |
85a748b9 |
386 | |
c627df81 |
387 | Another example is a L<Catalyst::Plugin::Cache::ControllerNamespacing>, |
388 | which wraps backends in objects that perform key mangling, in order to |
389 | keep caches namespaced per controller. |
85a748b9 |
390 | |
391 | However, this is generally left as a hook for larger, more complex |
c627df81 |
392 | applications. Most configurations should make due XXXX |
85a748b9 |
393 | |
c627df81 |
394 | The simplest way to dynamically select a backend is based on the |
395 | L</Cache Profiles> configuration. |
85a748b9 |
396 | |
397 | =head2 Meta Data Keys |
398 | |
399 | C<choose_cache_backend> is called with some default keys. |
400 | |
401 | =over 4 |
402 | |
403 | =item key |
404 | |
c627df81 |
405 | Supplied by C<cache_get>, C<cache_set>, and C<cache_remove>. |
85a748b9 |
406 | |
407 | =item value |
408 | |
c627df81 |
409 | Supplied by C<cache_set>. |
85a748b9 |
410 | |
411 | =item caller |
412 | |
413 | The package name of the innermost caller that doesn't match |
414 | C<qr/Plugin::Cache/>. |
415 | |
416 | =item caller_frame |
417 | |
418 | The entire C<caller($i)> frame of C<caller>. |
419 | |
420 | =item component |
421 | |
c627df81 |
422 | The package name of the innermost caller who C<isa> |
423 | L<Catalyst::Component>. |
85a748b9 |
424 | |
425 | =item component_frame |
426 | |
427 | This entire C<caller($i)> frame of C<component>. |
428 | |
429 | =item controller |
430 | |
c627df81 |
431 | The package name of the innermost caller who C<isa> |
432 | L<Catalyst::Controller>. |
85a748b9 |
433 | |
434 | =item controller_frame |
435 | |
436 | This entire C<caller($i)> frame of C<controller>. |
437 | |
438 | =back |
439 | |
c627df81 |
440 | =head2 Metadata Currying |
85a748b9 |
441 | |
c627df81 |
442 | In order to avoid specifying C<%meta> over and over again you may call |
443 | C<cache> or C<curry_cache> with C<%meta> once, and get back a B<curried |
444 | cache object>. This object responds to the methods C<get>, C<set>, and |
445 | C<remove>, by appending its captured metadata and delegating them to |
446 | C<cache_get>, C<cache_set>, and C<cache_remove>. |
85a748b9 |
447 | |
448 | This is simpler than it sounds. |
449 | |
450 | Here is an example using currying: |
451 | |
452 | my $cache = $c->cache( %meta ); # cache is curried |
453 | |
454 | $cache->set( $key, $value ); |
455 | |
456 | $cache->get( $key ); |
457 | |
458 | And here is an example without using currying: |
459 | |
460 | $c->cache_set( $key, $value, %meta ); |
461 | |
462 | $c->cache_get( $key, %meta ); |
463 | |
464 | See L<Catalyst::Plugin::Cache::Curried> for details. |
465 | |
0f0237aa |
466 | =head1 CONFIGURATION |
467 | |
85a748b9 |
468 | $c->config->{cache} = { |
469 | ... |
470 | }; |
0f0237aa |
471 | |
c627df81 |
472 | All configuration parameters should be provided in a hash reference |
473 | under the C<cache> key in the C<config> hash. |
0f0237aa |
474 | |
85a748b9 |
475 | =head2 Backend Configuration |
476 | |
477 | Configuring backend objects is done by adding hash entries under the |
c627df81 |
478 | C<backends> key in the main config. |
85a748b9 |
479 | |
c627df81 |
480 | A special case is that the hash key under the C<backend> (singular) key |
481 | of the main config is assumed to be the backend named C<default>. |
85a748b9 |
482 | |
0f0237aa |
483 | =over 4 |
484 | |
485 | =item class |
486 | |
85a748b9 |
487 | Instantiate a backend from a L<Cache> compatible class. E.g. |
0f0237aa |
488 | |
85a748b9 |
489 | $c->config->{cache}{backends}{small_things} = { |
490 | class => "Cache::Bounded", |
491 | interval => 1000, |
492 | size => 10000, |
493 | }; |
494 | |
495 | $c->config->{cache}{backends}{large_things} = { |
bd2e2f72 |
496 | class => "Cache::Memcached", |
85a748b9 |
497 | data => '1.2.3.4:1234', |
498 | }; |
0f0237aa |
499 | |
85a748b9 |
500 | The options in the hash are passed to the class's C<new> method. |
0f0237aa |
501 | |
85a748b9 |
502 | The class will be C<required> as necessary during setup time. |
0f0237aa |
503 | |
85a748b9 |
504 | =item store |
0f0237aa |
505 | |
c627df81 |
506 | Instantiate a backend using a store plugin, e.g. |
0f0237aa |
507 | |
85a748b9 |
508 | $c->config->{cache}{backend} = { |
509 | store => "FastMmap", |
510 | }; |
0f0237aa |
511 | |
c627df81 |
512 | Store plugins typically require less configuration because they are |
513 | specialized for L<Catalyst> applications. For example |
85a748b9 |
514 | L<Catalyst::Plugin::Cache::Store::FastMmap> will specify a default |
c627df81 |
515 | C<share_file>, and additionally use a subclass of L<Cache::FastMmap> |
516 | that can also store non reference data. |
85a748b9 |
517 | |
518 | The store plugin must be loaded. |
519 | |
520 | =back |
0f0237aa |
521 | |
85a748b9 |
522 | =head2 Cache Profiles |
523 | |
524 | =over 4 |
0f0237aa |
525 | |
526 | =item profiles |
527 | |
c627df81 |
528 | Supply your own predefined profiles for cache metadata, when using the |
529 | C<cache> method. |
85a748b9 |
530 | |
531 | For example when you specify |
532 | |
533 | $c->config->{cache}{profiles}{thumbnails} = { |
534 | backend => "large_things", |
535 | }; |
536 | |
537 | And then get a cache object like this: |
538 | |
539 | $c->cache("thumbnails"); |
540 | |
541 | It is the same as if you had done: |
542 | |
543 | $c->cache( backend => "large_things" ); |
544 | |
545 | =back |
546 | |
c627df81 |
547 | =head2 Miscellaneous Configuration |
85a748b9 |
548 | |
549 | =over 4 |
550 | |
551 | =item default_store |
552 | |
c627df81 |
553 | When you do not specify a C<store> parameter in the backend |
554 | configuration this one will be used instead. This configuration |
555 | parameter is not necessary if only one store plugin is loaded. |
0f0237aa |
556 | |
557 | =back |
558 | |
559 | =head1 TERMINOLOGY |
23b2d59b |
560 | |
561 | =over 4 |
562 | |
563 | =item backend |
564 | |
565 | An object that responds to the methods detailed in |
566 | L<Catalyst::Plugin::Cache::Backend> (or more). |
567 | |
568 | =item store |
569 | |
c627df81 |
570 | A plugin that provides backends of a certain type. This is a bit like a |
571 | factory. |
23b2d59b |
572 | |
0f0237aa |
573 | =item cache |
574 | |
575 | Stored key/value pairs of data for easy re-access. |
576 | |
c627df81 |
577 | =item metadata |
85a748b9 |
578 | |
c627df81 |
579 | "Extra" information about the item being stored, which can be used to |
580 | locate an appropriate backend. |
85a748b9 |
581 | |
23b2d59b |
582 | =item curried cache |
583 | |
0f0237aa |
584 | my $cache = $c->cache(type => 'thumbnails'); |
585 | $cache->set('pic01', $thumbnaildata); |
586 | |
c627df81 |
587 | A cache which has been pre-configured with a particular set of |
588 | namespacing data. In the example the cache returned could be one |
589 | specifically tuned for storing thumbnails. |
0f0237aa |
590 | |
c627df81 |
591 | An object that responds to C<get>, C<set>, and C<remove>, and will |
592 | automatically add metadata to calls to C<< $c->cache_get >>, etc. |
23b2d59b |
593 | |
594 | =back |
595 | |
772299b1 |
596 | =head1 SEE ALSO |
597 | |
c627df81 |
598 | L<Cache> - the generic cache API on CPAN. |
772299b1 |
599 | |
600 | L<Catalyst::Plugin::Cache::Store> - how to write a store plugin. |
601 | |
602 | L<Catalyst::Plugin::Cache::Curried> - the interface for curried caches. |
603 | |
604 | L<Catalyst::Plugin::Cache::Choose::KeyRegexes> - choose a backend based on |
605 | regex matching on the keys. Can be used to partition the keyspace. |
606 | |
607 | L<Catalyst::Plugin::Cache::ControllerNamespacing> - wrap backend objects in a |
c627df81 |
608 | name mangler so that every controller gets its own keyspace. |
772299b1 |
609 | |
271f5106 |
610 | =head1 AUTHOR |
611 | |
612 | Yuval Kogman, C<nothingmuch@woobling.org> |
613 | |
614 | =head1 COPYRIGHT & LICENSE |
c28ee69c |
615 | |
271f5106 |
616 | Copyright (c) Yuval Kogman, 2006. All rights reserved. |
617 | |
618 | This library is free software, you can redistribute it and/or modify it under |
619 | the same terms as Perl itself, as well as under the terms of the MIT license. |
620 | |
621 | =cut |
c28ee69c |
622 | |