Mercurial > pub > Impl
annotate Lib/IMPL/Web/Application/ControllerUnit.pm @ 134:44977efed303
Significant performance optimizations
Fixed recursion problems due converting objects to JSON
Added cache support for the templates
Added discovery feature for the web methods
| author | wizard |
|---|---|
| date | Mon, 21 Jun 2010 02:39:53 +0400 |
| parents | a07a66fd8d5c |
| children | c5bc900eefd3 |
| rev | line source |
|---|---|
| 133 | 1 use strict; |
| 110 | 2 package IMPL::Web::Application::ControllerUnit; |
| 3 use base qw(IMPL::Object); | |
| 4 | |
| 5 use IMPL::Class::Property; | |
| 112 | 6 use IMPL::DOM::Transform::PostToDOM; |
| 7 use IMPL::DOM::Schema; | |
| 113 | 8 use Class::Inspector; |
| 9 use File::Spec; | |
| 133 | 10 use Sub::Name; |
| 112 | 11 |
| 12 use constant { | |
| 13 CONTROLLER_METHODS => 'controller_methods', | |
| 14 STATE_CORRECT => 'correct', | |
| 15 STATE_NEW => 'new', | |
| 16 STATE_INVALID => 'invalid' | |
| 17 }; | |
| 110 | 18 |
| 19 BEGIN { | |
| 20 public property action => prop_get | owner_set; | |
| 21 public property application => prop_get | owner_set; | |
| 22 public property query => prop_get | owner_set; | |
| 111 | 23 public property formData => prop_get | owner_set; |
| 24 public property formSchema => prop_get | owner_set; | |
| 25 public property formErrors => prop_get | owner_set; | |
| 110 | 26 } |
| 27 | |
| 133 | 28 my %publicProps = map {$_->Name , 1} __PACKAGE__->get_meta(typeof IMPL::Class::PropertyInfo); |
| 29 | |
| 113 | 30 __PACKAGE__->class_data(CONTROLLER_METHODS,{}); |
| 31 | |
| 110 | 32 sub CTOR { |
| 112 | 33 my ($this,$action,$args) = @_; |
| 110 | 34 |
| 35 $this->action($action); | |
| 36 $this->application($action->application); | |
| 37 $this->query($action->query); | |
| 112 | 38 |
| 39 $this->$_($args->{$_}) foreach qw(formData formSchema formErrors); | |
| 40 } | |
| 41 | |
| 134 | 42 sub unitNamespace() { |
| 43 "" | |
| 44 } | |
| 45 | |
| 46 sub transactions { | |
| 47 my ($self,%methods) = @_; | |
| 48 | |
| 49 while (my ($method,$info) = each %methods) { | |
| 50 if ($info and ref $info ne 'HASH') { | |
| 51 warn "Bad transaction $method description"; | |
| 52 $info = {}; | |
| 53 } | |
| 54 | |
| 55 $info->{wrapper} = 'TransactionWrapper'; | |
| 56 $self->class_data(CONTROLLER_METHODS)->{$method} = $info; | |
| 57 } | |
| 58 } | |
| 59 | |
| 112 | 60 sub forms { |
| 61 my ($self,%forms) = @_; | |
| 62 | |
| 63 while ( my ($method,$info) = each %forms ) { | |
| 64 die new IMPL::Exception("A method doesn't exists in the controller",$self,$method) unless $self->can($method); | |
| 65 if ( not ref $info ) { | |
| 66 $self->class_data(CONTROLLER_METHODS)->{$method} = { | |
| 67 wrapper => 'FormWrapper', | |
| 68 schema => $info | |
| 69 }; | |
| 70 } elsif (ref $info eq 'HASH') { | |
| 71 die new IMPL::Exception("A schema must be specified",$self,$method) unless $info->{schema}; | |
| 72 | |
| 73 $self->class_data(CONTROLLER_METHODS)->{$method} = { | |
| 74 wrapper => 'FormWrapper', | |
| 75 schema => $info->{schema} | |
| 76 }; | |
| 77 } else { | |
| 78 die new IMPL::Exception("Unsupported method information",$self,$method); | |
| 79 } | |
| 80 } | |
| 81 } | |
| 82 | |
| 110 | 83 sub InvokeAction { |
| 84 my ($self,$method,$action) = @_; | |
| 85 | |
| 112 | 86 if (my $methodInfo = $self->class_data(CONTROLLER_METHODS)->{$method}) { |
| 87 if (my $wrapper = $methodInfo->{wrapper}) { | |
| 88 return $self->$wrapper($method,$action,$methodInfo); | |
| 89 } else { | |
| 90 return $self->TransactionWrapper($method,$action,$methodInfo); | |
| 91 } | |
| 110 | 92 } else { |
| 93 die new IMPL::InvalidOperationException("Invalid method call",$self,$method); | |
| 94 } | |
| 111 | 95 } |
| 96 | |
| 133 | 97 sub MakeParams { |
| 98 my ($this,$methodInfo) = @_; | |
| 99 | |
| 100 my $params; | |
| 101 if ($params = $methodInfo->{parameters} and ref $params eq 'ARRAY') { | |
| 102 return map $this->ResolveParam($_), @$params; | |
| 103 } | |
| 104 return(); | |
| 105 } | |
| 106 | |
| 107 sub ResolveParam { | |
| 108 my ($this,$param) = @_; | |
| 109 | |
| 110 if ( $param =~ /^::(\w+)$/ and $publicProps{$1}) { | |
| 111 return $this->$1(); | |
| 112 } else { | |
| 113 return $this->query->param($param); | |
| 114 } | |
| 115 } | |
| 116 | |
| 112 | 117 sub TransactionWrapper { |
| 118 my ($self,$method,$action,$methodInfo) = @_; | |
| 119 | |
| 120 my $unit = $self->new($action); | |
| 133 | 121 return $unit->$method($unit->MakeParams($methodInfo)); |
| 112 | 122 } |
| 123 | |
| 124 sub FormWrapper { | |
| 113 | 125 my ($self,$method,$action,$methodInfo) = @_; |
| 126 | |
| 127 my $schema = $self->loadSchema($methodInfo->{schema}); | |
| 128 | |
| 129 my $process = $action->query->param('process') || 0; | |
| 130 my $form = $methodInfo->{form} | |
| 131 || $action->query->param('form') | |
| 132 || $schema->selectSingleNode('ComplexNode')->name | |
| 133 or die new IMPL::Exception('No situable form name could be determined',$self,$method); | |
| 112 | 134 |
| 113 | 135 my %result; |
| 112 | 136 |
| 113 | 137 my $transform = IMPL::DOM::Transform::PostToDOM->new( |
| 138 undef, | |
| 139 $schema, | |
| 140 $form | |
| 141 ); | |
| 142 | |
| 143 $result{formSchema} = $schema; | |
| 126 | 144 $result{formData} = $transform->Transform($action->query); |
| 145 | |
| 112 | 146 |
| 113 | 147 if ($process) { |
| 148 $result{formErrors} = $transform->Errors->as_list; | |
| 149 if ($transform->Errors->Count) { | |
| 150 $result{state} = STATE_INVALID; | |
| 151 } else { | |
| 152 $result{state} = STATE_CORRECT; | |
| 153 my $unit = $self->new($action,\%result); | |
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154 |
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155 eval { |
| 133 | 156 $result{result} = $unit->$method($unit->MakeParams($methodInfo)); |
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157 }; |
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158 if (my $err = $@) { |
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159 $result{state} = STATE_INVALID; |
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160 if (eval { $err->isa(typeof IMPL::WrongDataException) } ) { |
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161 $result{formErrors} = $err->Args; |
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162 } else { |
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163 die $err; |
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164 } |
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165 } |
| 113 | 166 } |
| 167 } else { | |
| 168 $result{state} = STATE_NEW; | |
| 169 } | |
| 112 | 170 |
| 113 | 171 return \%result; |
| 172 } | |
| 173 | |
| 174 sub loadSchema { | |
| 175 my ($self,$name) = @_; | |
| 176 | |
| 126 | 177 if (-f $name) { |
| 178 return IMPL::DOM::Schema->LoadSchema($name); | |
| 179 } else { | |
| 180 my ($vol,$dir,$file) = File::Spec->splitpath( Class::Inspector->resolved_filename(ref $self || $self) ); | |
| 181 | |
| 182 return IMPL::DOM::Schema->LoadSchema(File::Spec->catfile($vol,$dir,$name)); | |
| 183 } | |
| 112 | 184 } |
| 185 | |
| 134 | 186 sub discover { |
| 187 my ($this) = @_; | |
| 188 | |
| 189 my $methods = $this->class_data(CONTROLLER_METHODS); | |
| 190 | |
| 191 my $namespace = $this->unitNamespace; | |
| 192 (my $module = typeof $this) =~ s/^$namespace//; | |
| 133 | 193 |
| 134 | 194 my %smd = ( |
| 195 module => [grep $_, split /::/, $module ], | |
| 196 ); | |
| 133 | 197 |
| 134 | 198 while (my ($method,$info) = each %$methods) { |
| 199 my %methodInfo = ( | |
| 200 name => $method | |
| 201 ); | |
| 202 $methodInfo{parameters} = $info->{parameters} if $info->{parameters}; | |
| 203 push @{$smd{methods}},\%methodInfo; | |
| 204 } | |
| 205 return \%smd; | |
| 133 | 206 } |
| 207 | |
| 134 | 208 __PACKAGE__->transactions( |
| 209 discover => undef | |
| 210 ); | |
| 133 | 211 |
| 111 | 212 1; |
| 213 | |
| 214 __END__ | |
| 215 | |
| 216 =pod | |
| 217 | |
| 218 =head1 NAME | |
| 219 | |
| 220 C<IMPL::Web::Application::ControllerUnit> - базовый класс для обработчика транзакций в модели контроллера. | |
| 221 | |
| 222 =head1 DESCRIPTION | |
| 223 | |
| 113 | 224 Классы, наследуемые от данного класса называется пакетом транзакций. Часть методов в таком классе |
| 225 объявляются как транзакции при помощи методов C<transaction>, C<form>. | |
| 111 | 226 |
| 227 Перед выполнением транзакции создается экземпляр объекта, в рамках которого будет выполнена транзакция. | |
| 228 Для этого вызывается метод C<InvokeAction($method,$action)>, который создает/восстанавливает контекст | |
| 229 транзакции. | |
| 230 | |
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231 Транзакции на данный момент делятся на простые и формы. Различные типы транзакций выполняются при помощи |
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232 различных оберток (C<TransactionWrapper> и C<FormWrapper>). Каждая обертка отвечает за конструирование |
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233 экземпляра объекта и вызов метода для выполнения транзакции, а также за возврат результата выполнения. |
| 111 | 234 |
| 235 =head2 Простые транзакции | |
| 236 | |
| 237 Простые транзакции получаю только запрос, без предварительной обработки, и возвращенный результат напрямую | |
| 238 передается пользователю. | |
| 239 | |
| 240 =head2 Формы | |
| 241 | |
| 242 При использовании форм запрос предварительно обрабатывается, для получения DOM документа с данными формы. | |
| 243 Для постороенния DOM документа используется схема. При этом становятся доступны дополнительные свойства | |
| 244 C<formData>, C<formSchema>, C<formErrors>. | |
| 245 | |
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246 Результат выполнения транзакции не возвращается наверх напрямую, а включается в структуру, которая |
| 111 | 247 выглядит следующим образом |
| 248 | |
| 249 =begin code | |
| 250 | |
| 251 { | |
| 252 state => '{ new | correct | invalid }', | |
| 253 result => $transactionResult, | |
| 254 formData => $formDOM, | |
| 255 formSchema => $formSchema, | |
| 256 formErrors => @errors | |
| 257 } | |
| 258 | |
| 259 =end code | |
| 260 | |
| 261 =over | |
| 262 | |
| 263 =item C<state> | |
| 264 | |
| 265 Состояние верификации формы. | |
| 266 | |
| 267 =over | |
| 268 | |
| 269 =item C<new> | |
| 270 | |
| 271 Первоначальное содержимое формы, оно может быть некорректным, но это нормально. | |
| 272 В данном состоянии транзакция обычно не выполняется. | |
| 273 | |
| 274 =item C<correct> | |
| 275 | |
| 276 Данные формы корректны, транзакция выполнена, и ее результат доступен через поле C<result> | |
| 277 | |
| 278 =item C<invalid> | |
| 279 | |
| 280 Содержимое формы не прошло верификацию, ошибки доступны через поле C<formErrors>. Транзакция | |
| 281 не выполнялась. | |
| 282 | |
| 283 =back | |
| 284 | |
| 285 =item C<result> | |
| 286 | |
| 287 Результат выполнения транзакции, если конечно таковая выполнялась. | |
| 288 | |
| 289 =item C<formData> | |
| 290 | |
| 291 ДОМ документ с данными формами. Документ существует всегда, не зависимо от его корректности, | |
| 292 может быть использован для построения формы, уже заполненную параметрами. | |
| 293 | |
| 294 =item C<formSchema> | |
| 295 | |
| 296 Схема данных формы, может использоваться для построения динамических форм. | |
| 297 | |
| 298 =item C<formErrors> | |
| 299 | |
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300 Ссылка на массив с ошибками при проверки формы. |
| 111 | 301 |
| 302 =back | |
| 303 | |
| 304 =head1 MEMBERS | |
| 305 | |
| 306 =over | |
| 307 | |
| 308 =item C<[get] application> | |
| 309 | |
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310 Объект приложения, которое обрабатывает запрос. |
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311 |
| 111 | 312 =item C<[get] query> |
| 313 | |
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314 Текущий запрос. |
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315 |
| 111 | 316 =item C<[get] response> |
| 317 | |
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318 Текущий ответ. |
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319 |
| 111 | 320 =item C<[get] formData> |
| 321 | |
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322 C<IMPL::DOM::Document> документ с данныим, если данный запрос является формой. |
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323 |
| 111 | 324 =item C<[get] formSchema> |
| 325 | |
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326 C<IMPL::DOM::Schema> документ со схемой формы данного запроса. |
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327 |
| 111 | 328 =item C<[get] formErrors> |
| 329 | |
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330 Ошибки верификации данных, если таковые были. Обычно при наличии ошибок в форме, транзакция |
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331 не выполняется, а эти ошибки передаются в ответ. |
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332 |
| 111 | 333 =item C<InvokeAction($method,$action)> |
| 334 | |
| 335 Конструирует контекст выполнения транзакции, может быть переопределен для конструирования контекста по | |
| 112 | 336 своим правилам. |
| 337 | |
| 338 =item C<TransactionWrapper($method,$action,$methodInfo)> | |
| 339 | |
| 340 Обертка для конструирования простых транзакций, может быть переопределен для конструирования контекста по | |
| 341 своим правилам. | |
| 342 | |
| 343 =item C<FormWrapper($method,$action,$methodInfo)> | |
| 344 | |
| 345 Обертка для конструирования форм, может быть переопределен для конструирования контекста по | |
| 346 своим правилам. | |
| 111 | 347 |
| 134 | 348 =item C<discover()> |
| 349 | |
| 350 Метод, опубликованный для вызова контроллером, возвращает описание методов в формате C<Simple Module Definition>. | |
| 351 | |
| 352 =begin code | |
| 353 | |
| 354 # SMD structure | |
| 355 { | |
| 356 module => ['Foo','Bar'], | |
| 357 methods => [ | |
| 358 { | |
| 359 name => 'search', | |
| 360 parameters => ['text','limit'] #optional | |
| 361 } | |
| 362 ] | |
| 363 } | |
| 364 | |
| 365 =end code | |
| 366 | |
| 111 | 367 =back |
| 368 | |
| 369 =head1 EXAMPLE | |
| 370 | |
| 371 =begin code | |
| 372 | |
| 373 package MyBooksUnit; | |
| 374 use strict; | |
| 375 use base qw(IMPL::Web::Application::ControllerUnit); | |
| 376 | |
| 377 __PACKAGE__->PassThroughArgs; | |
| 378 | |
| 134 | 379 sub unitDataClass { 'My::Books' } |
| 380 | |
| 381 __PACKAGE__->transactions( | |
| 382 find => { | |
| 383 parameters => [qw(author)] | |
| 384 }, | |
| 385 info => { | |
| 386 parameters => [qw(id)] | |
| 387 } | |
| 388 ); | |
| 111 | 389 __PACKAGE__->forms( |
| 390 create => 'books.create.xml' | |
| 391 ); | |
| 392 | |
| 393 sub find { | |
| 134 | 394 my ($this,$author) = @_; |
| 111 | 395 |
| 134 | 396 return $this->ds->find({author => $author}); |
| 111 | 397 } |
| 398 | |
| 399 sub info { | |
| 134 | 400 my ($this,$id) = @_; |
| 111 | 401 |
| 134 | 402 return $this->ds->find({id => $id}); |
| 111 | 403 } |
| 404 | |
| 405 sub create { | |
| 406 my ($this) = @_; | |
| 407 | |
| 408 my %book = map { | |
| 134 | 409 $_->nodeName, $_->nodeValue |
| 410 } $this->formData->selectNodes([qw(author_id title year ISBN)]); | |
| 111 | 411 |
| 134 | 412 return $this->ds->create(\%book); |
| 111 | 413 } |
| 414 | |
| 415 =end code | |
| 416 | |
| 417 =cut |