Duplicate code is one of the most pungent code smells. A rule that is often used is to re-structure code once it is duplicated in three or more places.
Common duplication problems, and corresponding solutions are:
Complex classes like Application often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes. You can also have a look at the cohesion graph to spot any un-connected, or weakly-connected components.
Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.
While breaking up the class, it is a good idea to analyze how other classes use Application, and based on these observations, apply Extract Interface, too.
1 | <?php |
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39 | class Application implements ContainerInterface, FactoryInterface, \DI\InvokerInterface |
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40 | { |
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41 | use EnableDIAnnotations; |
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42 | |||
43 | /** |
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44 | * @param string|array |
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45 | * .php file |
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46 | * ``` |
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47 | * return |
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48 | * [ |
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49 | * 'App.name' => 'App', |
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50 | * 'App.uriPrefix' => '/', |
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51 | * |
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52 | * 'DB.connection' => 'mysql:dbname=default;host=localhost', |
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53 | * 'DB.username' => 'root', |
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54 | * 'DB.password' => 'root', |
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55 | * 'DB.options' => [], |
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56 | * |
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57 | * |
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58 | * LoggerInterface::class => \DI\object(\Monolog\Logger::class) |
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59 | * ->constructor(\DI\get('AppName')), |
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60 | * // 注意, 系统缓存, 只使用 apc、文件缓存等本地缓存, 不要使用 redis 等分布式缓存 |
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61 | * Cache::class => \DI\object(FilesystemCache::class) |
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62 | * ->constructorParameter('directory', sys_get_temp_dir()) |
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63 | * ]; |
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64 | * ``` |
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65 | * or just the array |
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66 | * @return self |
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67 | */ |
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68 | 72 | static public function createByDefault($conf = []) |
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118 | |||
119 | /** |
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120 | * @return Cache |
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121 | */ |
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122 | 1 | public function getCache() |
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126 | |||
127 | /** |
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128 | * @param Cache $localCache |
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129 | */ |
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130 | public function setCache(Cache $localCache) |
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134 | |||
135 | /** |
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136 | * load routes from class |
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137 | * |
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138 | * @param string $className |
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139 | * @param string[] $hooks hook class names |
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140 | * @return void |
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141 | */ |
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142 | 2 | public function loadRoutesFromClass($className, $hooks=[]) |
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183 | |||
184 | /** |
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185 | * load routes from path |
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186 | * |
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187 | * 被加载的文件必须以: 类名.php的形式命名 |
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188 | * @param string $fromPath |
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189 | * @param string $namespace |
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190 | * @param string[] $hooks |
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191 | * @return void |
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192 | */ |
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193 | public function loadRoutesFromPath($fromPath, $namespace = '', $hooks=[]) |
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218 | |||
219 | /** |
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220 | * Add route |
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221 | * @param string $method |
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222 | * @param string $uri |
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223 | * @param callable $handler function(Application $app, Request $request):Response |
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224 | * @param string[] $hooks |
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225 | */ |
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226 | 1 | public function addRoute($method, $uri, callable $handler, $hooks=[]) |
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230 | |||
231 | /** |
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232 | * @return ControllerContainer[] |
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233 | */ |
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234 | 1 | public function getControllers() |
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242 | |||
243 | /** |
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244 | * @param Request|null $request |
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245 | * @param bool $send |
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246 | * @return Response |
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247 | */ |
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248 | 3 | public function dispatch(Request $request = null, $send = true) |
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312 | |||
313 | /** |
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314 | * @return GroupCountBasedDispatcher |
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315 | */ |
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316 | 2 | private function getDispatcher() |
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326 | |||
327 | /** |
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328 | * Finds an entry of the container by its identifier and returns it. |
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329 | * |
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330 | * @param string $id Identifier of the entry to look for. |
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331 | * |
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332 | * @throws NotFoundExceptionInterface No entry was found for **this** identifier. |
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333 | * @throws ContainerExceptionInterface Error while retrieving the entry. |
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334 | * |
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335 | * @return mixed Entry. |
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336 | */ |
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337 | 18 | public function get($id) |
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341 | |||
342 | /** |
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343 | * Returns true if the container can return an entry for the given identifier. |
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344 | * Returns false otherwise. |
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345 | * |
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346 | * `has($id)` returning true does not mean that `get($id)` will not throw an exception. |
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347 | * It does however mean that `get($id)` will not throw a `NotFoundExceptionInterface`. |
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348 | * |
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349 | * @param string $id Identifier of the entry to look for. |
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350 | * |
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351 | * @return bool |
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352 | */ |
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353 | public function has($id) |
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357 | |||
358 | /** |
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359 | * Call the given function using the given parameters. |
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360 | * |
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361 | * @param callable $callable Function to call. |
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362 | * @param array $parameters Parameters to use. |
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363 | * |
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364 | * @return mixed Result of the function. |
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365 | * |
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366 | * @throws InvocationException Base exception class for all the sub-exceptions below. |
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367 | * @throws NotCallableException |
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368 | * @throws NotEnoughParametersException |
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369 | */ |
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370 | public function call($callable, array $parameters = array()) |
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374 | |||
375 | 22 | public function make($name, array $parameters = []) |
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379 | |||
380 | /** |
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381 | * @param \string[] $globalHooks |
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382 | */ |
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383 | public function setGlobalHooks($globalHooks) |
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387 | |||
388 | /** |
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389 | * @return \string[] |
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390 | */ |
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391 | 2 | public function getGlobalHooks() |
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395 | |||
396 | public static function createRequestFromGlobals() |
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408 | |||
409 | 3 | public function getFullUri($uri) |
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413 | /** |
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414 | * @return string |
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415 | */ |
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416 | 3 | public function getUriPrefix() |
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420 | |||
421 | /** |
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422 | * @param string $uriPrefix |
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423 | */ |
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424 | 72 | public function setUriPrefix($uriPrefix) |
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428 | /** |
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429 | * @var string |
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430 | */ |
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431 | protected $uriPrefix = '/'; |
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432 | /** |
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433 | * @inject |
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434 | * @var Container |
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435 | */ |
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436 | protected $container; |
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437 | |||
438 | /** |
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439 | * @inject |
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440 | * @var ControllerContainerBuilder |
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441 | */ |
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442 | protected $controllerContainerBuilder; |
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443 | |||
444 | /** |
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445 | * @inject |
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446 | * @var Cache |
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447 | */ |
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448 | protected $cache; |
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449 | |||
450 | /** |
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451 | * [ |
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452 | * [method, uri, handler, hooks] |
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453 | * ] |
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454 | * @var array |
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455 | */ |
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456 | protected $routes = []; |
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457 | |||
458 | /** |
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459 | * @var string[] |
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460 | */ |
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461 | protected $controllers = []; |
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462 | |||
463 | /** |
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464 | * @var string[] |
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465 | */ |
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466 | protected $globalHooks = []; |
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467 | |||
468 | } |