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1 | =head1 NAME |
2 | |
3 | Catalyst::Upgrading - Instructions for upgrading to the latest Catalyst |
4 | |
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5 | =head1 Upgrading to Catalyst 5.9 |
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6 | |
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7 | The major change is that L<Plack>, a toolkit for using the L<PSGI> |
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8 | specification, now replaces most of the subclasses of L<Catalyst::Engine>. If |
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9 | you are using one of the standard subclasses of L<Catalyst::Engine> this |
10 | should be a straightforward upgrade for you. It was a design goal for |
11 | this release to preserve as much backwards compatibility as possible. |
12 | However, since L<Plack> is different from L<Catalyst::Engine>, it is |
13 | possible that differences exist for edge cases. Therefore, we recommend |
14 | that care be taken with this upgrade and that testing should be greater |
15 | than would be the case with a minor point update. Please inform the |
16 | Catalyst developers of any problems so that we can fix them and |
17 | incorporate tests. |
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18 | |
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19 | It is highly recommended that you become familiar with the L<Plack> ecosystem |
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20 | and documentation. Being able to take advantage of L<Plack> development and |
21 | middleware is a major bonus to this upgrade. Documentation about how to |
22 | take advantage of L<Plack::Middleware> by writing your own C<< .psgi >> file |
23 | is contained in L<Catalyst::PSGI>. |
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24 | |
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25 | If you have created a custom subclass of L<Catalyst:Engine>, you will |
26 | need to convert it to be a subclass of L<Plack::Handler>. |
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27 | |
28 | If you are using the L<Plack> engine, L<Catalyst::Engine::PSGI>, this new |
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29 | release supersedes that code. |
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30 | |
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31 | If you are using a subclass of L<Catalyst::Engine> that is aimed at |
32 | nonstandard or internal/testing uses, such as |
33 | L<Catalyst::Engine::Embeddable>, you should still be able to continue |
34 | using that engine. |
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35 | |
36 | Advice for specific subclasses of L<Catalyst::Engine> follows: |
37 | |
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38 | =head2 Upgrading the FastCGI Engine |
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39 | |
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40 | No upgrade is needed if your myapp_fastcgi.pl script is already upgraded |
41 | to use L<Catalyst::Script::FastCGI>. |
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42 | |
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43 | =head2 Upgrading the mod_perl / Apache Engines |
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44 | |
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45 | The engines that are built upon the various iterations of mod_perl, |
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46 | L<Catalyst::Engine::Apache::MP13> (for mod_perl 1, and Apache 1.x) and |
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47 | L<Catalyst::Engine::Apache2::MP20> (for mod_perl 2, and Apache 2.x), |
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48 | should be seamless upgrades and will work using using L<Plack::Handler::Apache1> |
49 | or L<Plack::Handler::Apache2> as required. |
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50 | |
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51 | L<Catalyst::Engine::Apache2::MP19>, however, is no longer supported, as |
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52 | Plack does not support mod_perl version 1.99. This is unlikely to be a |
53 | problem for anyone, as 1.99 was a brief beta-test release for mod_perl |
54 | 2, and all users of mod_perl 1.99 are encouraged to upgrade to a |
55 | supported release of Apache 2 and mod_perl 2. |
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56 | |
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57 | =head2 Upgrading the HTTP Engine |
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58 | |
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59 | The default development server that comes with the L<Catalyst> distribution |
60 | should continue to work as expected with no changes as long as your C<myapp_server> |
61 | script is upgraded to use L<Catalyst::Script::HTTP>. |
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62 | |
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63 | =head2 Upgrading the CGI Engine |
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64 | |
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65 | If you were using L<Catalyst::Engine::CGI> there is no upgrade needed if your |
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66 | myapp_cgi.pl script is already upgraded to use L<Catalyst::Script::CGI>. |
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67 | |
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68 | =head2 Upgrading the Preforking Engine |
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69 | |
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70 | If you were using L<Catalyst::Engine::HTTP::Prefork> then L<Starman> |
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71 | is automatically loaded. You should (at least) change your C<Makefile.PL> |
72 | to depend on Starman. |
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73 | |
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74 | You can regenerate your C<myapp_server.pl> script with C<catalyst.pl> |
75 | and implement a C<MyApp::Script::Server> class that looks like this: |
76 | |
77 | package MyApp::Script::Server; |
78 | use Moose; |
79 | use namespace::autoclean; |
80 | |
81 | extends 'CatalystX::Script::Server::Starman'; |
82 | |
83 | 1; |
84 | |
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85 | This takes advantage of the new script system, and will add a number of |
86 | options to the standard server script as extra options are added by |
87 | Starman. |
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88 | |
89 | More information about these options can be seen at |
90 | L<CatalystX::Script::Server::Starman/SYNOPSIS>. |
91 | |
92 | An alternate route to implement this functionality is to write a simple .psgi |
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93 | file for your application, and then use the L<plackup> utility to start the |
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94 | server. |
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95 | |
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96 | =head2 Upgrading the PSGI Engine |
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97 | |
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98 | If you were using L<Catalyst::Engine::PSGI>, this new release supersedes |
99 | this engine in supporting L<Plack>. By default the Engine is now always |
100 | L<Plack>. As a result, you can remove the dependency on |
101 | L<Catalyst::Engine::PSGI> in your C<Makefile.PL>. |
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102 | |
103 | Applications that were using L<Catalyst::Engine::PSGI> |
104 | previously should entirely continue to work in this release with no changes. |
105 | |
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106 | However, if you have an C<app.psgi> script, then you no longer need to |
107 | specify the PSGI engine. Instead, the L<Catalyst> application class now |
108 | has a new method C<psgi_app> which returns a L<PSGI> compatible coderef |
109 | which you can wrap in the middleware of your choice. |
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110 | |
111 | Catalyst will use the .psgi for your application if it is located in the C<home> |
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112 | directory of the application. |
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113 | |
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114 | For example, if you were using L<Catalyst::Engine::PSGI> in the past, you will |
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115 | have written (or generated) a C<script/myapp.psgi> file similar to this one: |
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116 | |
117 | use Plack::Builder; |
118 | use MyCatalytApp; |
119 | |
120 | MyCatalystApp->setup_engine('PSGI'); |
121 | |
122 | builder { |
123 | enable ... # enable your desired middleware |
124 | sub { MyCatalystApp->run(@_) }; |
125 | }; |
126 | |
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127 | Instead, you now say: |
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128 | |
129 | use Plack::Builder; |
130 | use MyCatalystApp; |
131 | |
132 | builder { |
133 | enable ... #enable your desired middleware |
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134 | MyCatalystApp->psgi_app; |
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135 | }; |
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136 | |
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137 | In the simplest case: |
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138 | |
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139 | MyCatalystApp->setup_engine('PSGI'); |
140 | my $app = sub { MyCatalystApp->run(@_) } |
141 | |
142 | becomes |
143 | |
144 | MyCatalystApp->setup_engine('PSGI'); |
145 | my $app = MyCatalystApp->psgi_app(@_); |
146 | |
147 | B<NOT>: |
148 | |
149 | my $app = sub { MyCatalystApp->psgi_app(@_) }; |
150 | # If you make ^^ this mistake, your app won't work, and will confuse the hell out of you! |
151 | |
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152 | You can now move C<< script/myapp.psgi >> to C<< myapp.psgi >>, and the built-in |
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153 | Catalyst scripts and your test suite will start using your .psgi file. |
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154 | |
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155 | B<NOTE:> If you rename your .psgi file without these modifications, then |
156 | any tests run via L<Catalyst::Test> will not be compatible with the new |
157 | release, and will result in the development server starting, rather than |
158 | the expected test running. |
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159 | |
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160 | =head2 Engines which are known to be broken |
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161 | |
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162 | The following engines B<DO NOT> work as of Catalyst version 5.9. The |
163 | core team will be happy to work with the developers and/or users of |
164 | these engines to help them port to the new Plack/Engine system, but for |
165 | now, applications which are currently using these engines B<WILL NOT> |
166 | run without modification to the engine code. |
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167 | |
168 | =over |
169 | |
170 | =item Catalyst::Engine::Wx |
171 | |
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172 | =item Catalyst::Engine::Zeus |
173 | |
174 | =item Catalyst::Engine::JobQueue::POE |
175 | |
176 | =item Catalyst::Engine::XMPP2 |
177 | |
178 | =item Catalyst::Engine::SCGI |
179 | |
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180 | =back |
181 | |
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182 | =head2 Engines with unknown status |
183 | |
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184 | The following engines are untested or have unknown compatibility. |
185 | Reports are highly encouraged: |
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186 | |
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187 | =over |
188 | |
189 | =item Catalyst::Engine::Mojo |
190 | |
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191 | =item Catalyst::Engine::Server (marked as Deprecated) |
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192 | |
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193 | =item Catalyst::Engine::HTTP::POE (marked as Deprecated) |
ad15c817 |
194 | |
195 | =back |
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196 | |
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197 | =head2 Specifying the engine in the call to ->setup |
198 | |
199 | XXX FIXME |
200 | |
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201 | =head2 Plack functionality |
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202 | |
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203 | See L<Catalyst::PSGI>. |
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204 | |
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205 | =head2 Tests in 5.9 |
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206 | |
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207 | Tests should generally work the same in Catalyst 5.9, but there are |
208 | some differences. |
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209 | |
e6006848 |
210 | Previously, if using L<Catalyst::Test> and doing local requests (against |
211 | a local server), if the application threw an exception then this |
212 | exception propagated into the test. |
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213 | |
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214 | This behavior has been removed, and now a 500 response will be returned |
215 | to the test. This change standardizes behavior, so that local test |
216 | requests behave similarly to remote requests. |
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217 | |
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218 | =head1 Upgrading to Catalyst 5.80 |
219 | |
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220 | Most applications and plugins should run unaltered on Catalyst 5.80. |
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221 | |
8f61d649 |
222 | However, a lot of refactoring work has taken place, and several changes have |
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223 | been made which could cause incompatibilities. If your application or plugin |
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224 | is using deprecated code, or relying on side effects, then you could have |
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225 | issues upgrading to this release. |
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226 | |
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227 | Most issues found with pre-existing components have been easy to |
228 | solve. This document provides a complete description of behavior changes |
229 | which may cause compatibility issues, and of new Catalyst warnings which |
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230 | might be unclear. |
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231 | |
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232 | If you think you have found an upgrade-related issue which is not covered in |
233 | this document, please email the Catalyst list to discuss the problem. |
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234 | |
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235 | =head1 Moose features |
236 | |
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237 | =head2 Application class roles |
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238 | |
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239 | You can only apply method modifiers after the application's C<< ->setup >> |
85f0a66f |
240 | method has been called. This means that modifiers will not work with methods |
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241 | run during the call to C<< ->setup >>. |
85f0a66f |
242 | |
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243 | See L<Catalyst::Manual::ExtendingCatalyst> for more information about using |
244 | L<Moose> in your applications. |
245 | |
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246 | =head2 Controller actions in Moose roles |
247 | |
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248 | You can use L<MooseX::MethodAttributes::Role> if you want to declare actions |
249 | inside Moose roles. |
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250 | |
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251 | =head2 Using Moose in Components |
252 | |
253 | The correct way to use Moose in a component in a both forward and backwards |
254 | compatible way is: |
255 | |
256 | package TestApp::Controller::Root; |
257 | use Moose; |
258 | BEGIN { extends 'Catalyst::Component' }; # Or ::Controller, or whatever |
259 | |
260 | See L<Components which inherit from Moose::Object before Catalyst::Component>. |
261 | |
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262 | =head1 Known backwards compatibility breakages |
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263 | |
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264 | =head2 Applications in a single file |
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265 | |
266 | Applications must be in their own file, and loaded at compile time. This |
8f61d649 |
267 | issue generally only affects the tests of CPAN distributions. Your |
268 | application will fail if you try to define an application inline in a |
269 | block, and use plugins which supply a C< new > method, then use that |
270 | application latter in tests within the same file. |
85f0a66f |
271 | |
272 | This is due to the fact that Catalyst is inlining a new method on your |
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273 | application class allowing it to be compatible with Moose. The method |
274 | used to do this changed in 5.80004 to avoid the possibility of reporting |
275 | an 'Unknown Error' if your application failed to compile. |
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276 | |
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277 | =head2 Issues with Class::C3 |
278 | |
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279 | Catalyst 5.80 uses the L<Algorithm::C3> method dispatch order. This is |
280 | built into Perl 5.10, and comes via L<Class::C3> for Perl 5.8. This |
281 | replaces L<NEXT> with L<Class::C3::Adopt::NEXT>, forcing all components |
282 | to resolve methods using C3, rather than the unpredictable dispatch |
283 | order of L<NEXT>. |
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284 | |
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285 | This issue is characterised by your application failing to start due to an |
286 | error message about having a non-linear @ISA. |
287 | |
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288 | The Catalyst plugin most often causing this is |
289 | L<Catalyst::Plugin::Session::Store::FastMmap> - if you are using this |
290 | plugin and see issues, then please upgrade your plugins, as it has been |
291 | fixed. Note that Makefile.PL in the distribution will warn about known |
292 | incompatible components. |
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293 | |
294 | This issue can, however, be found in your own application - the only solution is |
295 | to go through each base class of the class the error was reported against, until |
296 | you identify the ones in conflict, and resolve them. |
297 | |
298 | To be able to generate a linear @ISA, the list of superclasses for each |
299 | class must be resolvable using the C3 algorithm. Unfortunately, when |
300 | superclasses are being used as mixins (to add functionality used in your class), |
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301 | and with multiple inheritance, it is easy to get this wrong. |
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302 | |
303 | Most common is the case of: |
304 | |
305 | package Component1; # Note, this is the common case |
306 | use base qw/Class::Accessor::Fast Class::Data::Inheritable/; |
307 | |
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308 | package Component2; # Accidentally saying it this way causes a failure |
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309 | use base qw/Class::Data::Inheritable Class::Accessor::Fast/; |
310 | |
311 | package GoesBang; |
312 | use base qw/Component1 Component2/; |
313 | |
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314 | Any situation like this will cause your application to fail to start. |
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315 | |
8f61d649 |
316 | For additional documentation about this issue, and how to resolve it, see |
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317 | L<Class::C3::Adopt::NEXT>. |
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318 | |
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319 | =head2 Components which inherit from Moose::Object before Catalyst::Component |
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320 | |
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321 | Moose components which say: |
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322 | |
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323 | package TestApp::Controller::Example; |
324 | use Moose; |
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325 | extends qw/Moose::Object Catalyst::Component/; |
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326 | |
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327 | to use the constructor provided by Moose, while working (if you do some hacks |
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328 | with the C< BUILDARGS > method), will not work with Catalyst 5.80 as |
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329 | C<Catalyst::Component> inherits from C<Moose::Object>, and so C< @ISA > fails |
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330 | to linearize. |
6f04e56a |
331 | |
6f04e56a |
332 | The correct way to use Moose in a component in a both forward and backwards |
333 | compatible way is: |
334 | |
335 | package TestApp::Controller::Root; |
336 | use Moose; |
337 | BEGIN { extends 'Catalyst::Component' }; # Or ::Controller, or whatever |
338 | |
ba03ccca |
339 | Note that the C< extends > declaration needs to occur in a begin block for |
3df46b1b |
340 | L<attributes> to operate correctly. |
341 | |
d935773d |
342 | This way you do not inherit directly from C<Moose::Object> |
343 | yourself. Having components which do not inherit their constructor from |
344 | C<Catalyst::Component> is B<unsupported>, and has never been recommended, |
345 | therefore you're on your own if you're using this technique. You'll need |
346 | to detect the version of Catalyst your application is running, and deal |
347 | with it appropriately. |
348 | |
eaae9a92 |
349 | You also don't get the L<Moose::Object> constructor, and therefore attribute |
350 | initialization will not work as normally expected. If you want to use Moose |
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351 | attributes, then they need to be made lazy to correctly initialize. |
352 | |
353 | Note that this only applies if your component needs to maintain component |
354 | backwards compatibility for Catalyst versions before 5.71001 - in 5.71001 |
355 | attributes work as expected, and the BUILD method is called normally |
eaae9a92 |
356 | (although BUILDARGS is not). |
3df46b1b |
357 | |
358 | If you depend on Catalyst 5.8, then B<all> Moose features work as expected. |
8566c0de |
359 | |
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360 | You will also see this issue if you do the following: |
361 | |
362 | package TestApp::Controller::Example; |
363 | use Moose; |
364 | use base 'Catalyst::Controller'; |
365 | |
366 | as C< use base > appends to @ISA. |
367 | |
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368 | =head3 use Moose in MyApp |
369 | |
370 | Similar to the above, this will also fail: |
371 | |
372 | package MyApp; |
373 | use Moose; |
374 | use Catalyst qw/ |
375 | ConfigLoader |
376 | /; |
377 | __PACKAGE__->setup; |
378 | |
379 | If you need to use Moose in your application class (e.g. for method modifiers |
8f61d649 |
380 | etc.) then the correct technique is: |
e11cac87 |
381 | |
382 | package MyApp; |
383 | use Moose; |
5b6f82d2 |
384 | use Catalyst; |
385 | |
e11cac87 |
386 | extends 'Catalyst'; |
5b6f82d2 |
387 | |
388 | __PACKAGE__->config( name => 'MyApp' ); |
e11cac87 |
389 | __PACKAGE__->setup(qw/ |
390 | ConfigLoader |
391 | /); |
392 | |
04a48104 |
393 | =head2 Anonymous closures installed directly into the symbol table |
394 | |
395 | If you have any code which installs anonymous subroutine references directly |
396 | into the symbol table, you may encounter breakages. The simplest solution is |
397 | to use L<Sub::Name> to name the subroutine. Example: |
398 | |
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399 | # Original code, likely to break: |
1a98f036 |
400 | my $full_method_name = join('::', $package_name, $method_name); |
04a48104 |
401 | *$full_method_name = sub { ... }; |
402 | |
e11cac87 |
403 | # Fixed Code |
04a48104 |
404 | use Sub::Name 'subname'; |
405 | my $full_method_name = join('::',$package_name, $method_name); |
406 | *$full_method_name = subname $full_method_name, sub { ... }; |
407 | |
8f61d649 |
408 | Additionally, you can take advantage of Catalyst's use of L<Class::MOP> and |
409 | install the closure using the appropriate metaclass. Example: |
04a48104 |
410 | |
411 | use Class::MOP; |
412 | my $metaclass = Moose::Meta::Class->initialize($package_name); |
413 | $metaclass->add_method($method_name => sub { ... }); |
414 | |
780654ad |
415 | =head2 Hooking into application setup |
416 | |
8f61d649 |
417 | To execute code during application start-up, the following snippet in MyApp.pm |
780654ad |
418 | used to work: |
419 | |
420 | sub setup { |
421 | my ($class, @args) = @_; |
422 | $class->NEXT::setup(@args); |
423 | ... # things to do after the actual setup |
424 | } |
425 | |
8f61d649 |
426 | With Catalyst 5.80 this won't work anymore, because Catalyst no longer |
427 | uses NEXT.pm for method resolution. The functionality was only ever |
428 | originally operational as L<NEXT> remembers what methods have already |
429 | been called, and will not call them again. |
780654ad |
430 | |
1a98f036 |
431 | Using this now causes infinite recursion between MyApp::setup and |
432 | Catalyst::setup, due to other backwards compatibility issues related to how |
e6c5b548 |
433 | plugin setup works. Moose method modifiers like C<< before|after|around setup |
1a98f036 |
434 | => sub { ... }; >> also will not operate correctly on the setup method. |
780654ad |
435 | |
436 | The right way to do it is this: |
437 | |
438 | after setup_finalize => sub { |
439 | ... # things to do after the actual setup |
440 | }; |
441 | |
ade00972 |
442 | The setup_finalize hook was introduced as a way to avoid this issue. |
1a98f036 |
443 | |
e11cac87 |
444 | =head2 Components with a new method which returns false |
7e2ec16e |
445 | |
8dd2f514 |
446 | Previously, if you had a component which inherited from Catalyst::COMPONENT, |
8f61d649 |
447 | but overrode the new method to return false, then your class's configuration |
8dd2f514 |
448 | would be blessed into a hash on your behalf, and this would be returned from |
a87f5aa5 |
449 | the COMPONENT method. |
7e2ec16e |
450 | |
8f61d649 |
451 | This behavior makes no sense, and so has been removed. Implementing your own |
452 | C< new > method in components is B<highly> discouraged. Instead, you should |
453 | inherit the new method from Catalyst::Component, and use Moose's BUILD |
1a98f036 |
454 | functionality and/or Moose attributes to perform any construction work |
455 | necessary for your class. |
7e2ec16e |
456 | |
457 | =head2 __PACKAGE__->mk_accessor('meta'); |
458 | |
e11cac87 |
459 | Won't work due to a limitation of L<Moose>. This is currently being fixed |
460 | inside Moose. |
7e2ec16e |
461 | |
462 | =head2 Class::Data::Inheritable side effects |
463 | |
8dd2f514 |
464 | Previously, writing to a class data accessor would copy the accessor method |
465 | down into your package. |
466 | |
8f61d649 |
467 | This behavior has been removed. While the class data is still stored |
8dd2f514 |
468 | per-class, it is stored on the metaclass of the class defining the accessor. |
7e2ec16e |
469 | |
8f61d649 |
470 | Therefore anything relying on the side effect of the accessor being copied down |
8dd2f514 |
471 | will be broken. |
7e2ec16e |
472 | |
1a98f036 |
473 | The following test demonstrates the problem: |
8dd2f514 |
474 | |
475 | { |
476 | package BaseClass; |
477 | use base qw/Class::Data::Inheritable/; |
478 | __PACKAGE__->mk_classdata('foo'); |
479 | } |
480 | |
481 | { |
482 | package Child; |
483 | use base qw/BaseClass/; |
484 | } |
485 | |
486 | BaseClass->foo('base class'); |
487 | Child->foo('sub class'); |
eaae9a92 |
488 | |
e11cac87 |
489 | use Test::More; |
8dd2f514 |
490 | isnt(BaseClass->can('foo'), Child->can('foo')); |
7e2ec16e |
491 | |
8f61d649 |
492 | =head2 Extending Catalyst::Request or other classes in an ad-hoc manner using mk_accessors |
7e2ec16e |
493 | |
8dd2f514 |
494 | Previously, it was possible to add additional accessors to Catalyst::Request |
495 | (or other classes) by calling the mk_accessors class method. |
7e2ec16e |
496 | |
8f61d649 |
497 | This is no longer supported - users should make a subclass of the class whose |
498 | behavior they would like to change, rather than globally polluting the |
e11cac87 |
499 | Catalyst objects. |
8be895a7 |
500 | |
10011c19 |
501 | =head2 Confused multiple inheritance with Catalyst::Component::COMPONENT |
8be895a7 |
502 | |
8f61d649 |
503 | Previously, Catalyst's COMPONENT method would delegate to the method on |
504 | the right hand side, which could then delegate back again with |
505 | NEXT. This is poor practice, and in addition, makes no sense with C3 |
506 | method dispatch order, and is therefore no longer supported. |
bcc773b9 |
507 | |
ba03ccca |
508 | If a COMPONENT method is detected in the inheritance hierarchy to the right |
bcc773b9 |
509 | hand side of Catalyst::Component::COMPONENT, then the following warning |
510 | message will be emitted: |
7e2ec16e |
511 | |
8dd2f514 |
512 | There is a COMPONENT method resolving after Catalyst::Component |
5687c7f9 |
513 | in ${next_package}. |
8dd2f514 |
514 | |
8f61d649 |
515 | The correct fix is to re-arrange your class's inheritance hierarchy so that the |
bcc773b9 |
516 | COMPONENT method you would like to inherit is the first (left-hand most) |
517 | COMPONENT method in your @ISA. |
7e2ec16e |
518 | |
c571d2c8 |
519 | =head1 WARNINGS |
520 | |
63b546b1 |
521 | =head2 Actions in your application class |
522 | |
523 | Having actions in your application class will now emit a warning at application |
e256d0e1 |
524 | startup as this is deprecated. It is highly recommended that these actions are moved |
63b546b1 |
525 | into a MyApp::Controller::Root (as demonstrated by the scaffold application |
55dd186c |
526 | generated by catalyst.pl). |
da73c6af |
527 | |
e256d0e1 |
528 | This warning, also affects tests. You should move actions in your test, |
529 | creating a myTest::Controller::Root, like the following example: |
da73c6af |
530 | |
531 | package MyTest::Controller::Root; |
95a52a01 |
532 | |
da73c6af |
533 | use strict; |
534 | use warnings; |
95a52a01 |
535 | |
da73c6af |
536 | use parent 'Catalyst::Controller'; |
95a52a01 |
537 | |
da73c6af |
538 | __PACKAGE__->config(namespace => ''); |
95a52a01 |
539 | |
da73c6af |
540 | sub action : Local { |
541 | my ( $self, $c ) = @_; |
542 | $c->do_something; |
543 | } |
95a52a01 |
544 | |
da73c6af |
545 | 1; |
63b546b1 |
546 | |
ac9279b0 |
547 | =head2 ::[MVC]:: naming scheme |
548 | |
549 | Having packages called MyApp::[MVC]::XX is deprecated and can no longer be generated |
550 | by catalyst.pl |
551 | |
552 | This is still supported, but it is recommended that you rename your application |
553 | components to Model/View/Controller. |
554 | |
555 | A warning will be issued at application startup if the ::[MVC]:: naming scheme is |
556 | in use. |
557 | |
ade00972 |
558 | =head2 Catalyst::Base |
559 | |
8f61d649 |
560 | Any code using L<Catalyst::Base> will now emit a warning; this |
561 | module will be removed in a future release. |
ade00972 |
562 | |
c571d2c8 |
563 | =head2 Methods in Catalyst::Dispatcher |
564 | |
8f61d649 |
565 | The following methods in Catalyst::Dispatcher are implementation |
566 | details, which may change in the 5.8X release series, and therefore their use |
bcc773b9 |
567 | is highly deprecated. |
c571d2c8 |
568 | |
569 | =over |
570 | |
8dd2f514 |
571 | =item tree |
c571d2c8 |
572 | |
8dd2f514 |
573 | =item dispatch_types |
c571d2c8 |
574 | |
8dd2f514 |
575 | =item registered_dispatch_types |
c571d2c8 |
576 | |
8dd2f514 |
577 | =item method_action_class |
c571d2c8 |
578 | |
8dd2f514 |
579 | =item action_hash |
c571d2c8 |
580 | |
581 | =item container_hash |
582 | |
583 | =back |
584 | |
585 | The first time one of these methods is called, a warning will be emitted: |
7e2ec16e |
586 | |
bcc773b9 |
587 | Class $class is calling the deprecated method Catalyst::Dispatcher::$public_method_name, |
dacd8b0e |
588 | this will be removed in Catalyst 5.9 |
7e2ec16e |
589 | |
c571d2c8 |
590 | You should B<NEVER> be calling any of these methods from application code. |
591 | |
8f61d649 |
592 | Plugin authors and maintainers whose plugins currently call these methods |
8f5a2bd9 |
593 | should change to using the public API, or, if you do not feel the public API |
8f61d649 |
594 | adequately supports your use case, please email the development list to |
8f5a2bd9 |
595 | discuss what API features you need so that you can be appropriately supported. |
7e2ec16e |
596 | |
95b20422 |
597 | =head2 Class files with names that don't correspond to the packages they define |
7e2ec16e |
598 | |
e11cac87 |
599 | In this version of Catalyst, if a component is loaded from disk, but no |
ba03ccca |
600 | symbols are defined in that component's name space after it is loaded, this |
bcc773b9 |
601 | warning will be issued: |
7e2ec16e |
602 | |
bcc773b9 |
603 | require $class was successful but the package is not defined. |
7e2ec16e |
604 | |
8f61d649 |
605 | This is to protect against confusing bugs caused by mistyping package names, |
bcc773b9 |
606 | and will become a fatal error in a future version. |
607 | |
608 | Please note that 'inner packages' (via L<Devel::InnerPackage>) are still fully |
8f61d649 |
609 | supported; this warning is only issued when component file naming does not map |
bcc773b9 |
610 | to B<any> of the packages defined within that component. |
7e2ec16e |
611 | |
5687c7f9 |
612 | =head2 $c->plugin method |
613 | |
25f61108 |
614 | Calling the plugin method is deprecated, and calling it at run time is B<highly |
8dd2f514 |
615 | deprecated>. |
7e2ec16e |
616 | |
95a52a01 |
617 | Instead you are recommended to use L<Catalyst::Model::Adaptor> or similar to |
ba03ccca |
618 | compose the functionality you need outside of the main application name space. |
7e2ec16e |
619 | |
4e68badc |
620 | Calling the plugin method will not be supported past Catalyst 5.81. |
bcc773b9 |
621 | |
7e2ec16e |
622 | =cut |
4e68badc |
623 | |