Complex classes like GarbageCollector 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 GarbageCollector, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 44 | class GarbageCollector extends AbstractDataHandlerListener implements SingletonInterface |
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| 45 | { |
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| 46 | /** |
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| 47 | * @var array |
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| 48 | */ |
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| 49 | protected $trackedRecords = []; |
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| 50 | |||
| 51 | /** |
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| 52 | * @var TCAService |
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| 53 | */ |
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| 54 | protected $tcaService; |
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| 55 | |||
| 56 | /** |
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| 57 | * GarbageCollector constructor. |
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| 58 | * @param TCAService|null $TCAService |
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| 59 | */ |
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| 60 | 4 | public function __construct(TCAService $TCAService = null) |
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| 64 | |||
| 65 | /** |
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| 66 | * Hooks into TCE main and tracks record deletion commands. |
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| 67 | * |
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| 68 | * @param string $command The command. |
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| 69 | * @param string $table The table the record belongs to |
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| 70 | * @param int $uid The record's uid |
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| 71 | * @param string $value Not used |
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| 72 | * @param DataHandler $tceMain TYPO3 Core Engine parent object, not used |
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| 73 | * @return void |
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| 74 | */ |
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| 75 | public function processCmdmap_preProcess( |
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| 91 | |||
| 92 | /** |
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| 93 | * Holds the configuration when a recursive page queing should be triggered. |
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| 94 | * |
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| 95 | * @var array |
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| 96 | * @return array |
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| 97 | */ |
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| 98 | 2 | protected function getUpdateSubPagesRecursiveTriggerConfiguration() |
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| 113 | |||
| 114 | /** |
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| 115 | * Tracks down index documents belonging to a particular record or page and |
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| 116 | * removes them from the index and the Index Queue. |
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| 117 | * |
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| 118 | * @param string $table The record's table name. |
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| 119 | * @param int $uid The record's uid. |
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| 120 | * @throws \UnexpectedValueException if a hook object does not implement interface \ApacheSolrForTypo3\Solr\GarbageCollectorPostProcessor |
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| 121 | */ |
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| 122 | 4 | public function collectGarbage($table, $uid) |
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| 146 | |||
| 147 | /** |
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| 148 | * Tracks down index documents belonging to a particular page and |
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| 149 | * removes them from the index and the Index Queue. |
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| 150 | * |
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| 151 | * @param string $table The record's table name. |
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| 152 | * @param int $uid The record's uid. |
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| 153 | */ |
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| 154 | 4 | protected function collectPageGarbage($table, $uid) |
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| 185 | |||
| 186 | /** |
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| 187 | * @param string $table |
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| 188 | * @param int $uid |
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| 189 | * @param array $changedFields |
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| 190 | */ |
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| 191 | 2 | protected function deleteSubpagesWhenExtendToSubpagesIsSet($table, $uid, $changedFields) |
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| 206 | |||
| 207 | /** |
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| 208 | * Deletes index documents for a given record identification. |
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| 209 | * |
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| 210 | * @param string $table The record's table name. |
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| 211 | * @param int $uid The record's uid. |
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| 212 | */ |
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| 213 | 4 | protected function deleteIndexDocuments($table, $uid) |
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| 235 | |||
| 236 | /** |
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| 237 | * Tracks down index documents belonging to a particular record and |
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| 238 | * removes them from the index and the Index Queue. |
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| 239 | * |
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| 240 | * @param string $table The record's table name. |
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| 241 | * @param int $uid The record's uid. |
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| 242 | */ |
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| 243 | protected function collectRecordGarbage($table, $uid) |
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| 248 | |||
| 249 | // methods checking whether to trigger garbage collection |
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| 250 | |||
| 251 | /** |
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| 252 | * Hooks into TCE main and tracks page move commands. |
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| 253 | * |
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| 254 | * @param string $command The command. |
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| 255 | * @param string $table The table the record belongs to |
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| 256 | * @param int $uid The record's uid |
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| 257 | * @param string $value Not used |
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| 258 | * @param DataHandler $tceMain TYPO3 Core Engine parent object, not used |
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| 259 | */ |
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| 260 | public function processCmdmap_postProcess( |
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| 280 | |||
| 281 | /** |
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| 282 | * Hooks into TCE main and tracks changed records. In this case the current |
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| 283 | * record's values are stored to do a change comparison later on for fields |
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| 284 | * like fe_group. |
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| 285 | * |
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| 286 | * @param array $incomingFields An array of incoming fields, new or changed, not used |
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| 287 | * @param string $table The table the record belongs to |
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| 288 | * @param mixed $uid The record's uid, [integer] or [string] (like 'NEW...') |
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| 289 | * @param DataHandler $tceMain TYPO3 Core Engine parent object, not used |
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| 290 | */ |
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| 291 | public function processDatamap_preProcessFieldArray( |
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| 324 | |||
| 325 | /** |
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| 326 | * Hooks into TCE Main and watches all record updates. If a change is |
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| 327 | * detected that would remove the record from the website, we try to find |
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| 328 | * related documents and remove them from the index. |
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| 329 | * |
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| 330 | * @param string $status Status of the current operation, 'new' or 'update' |
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| 331 | * @param string $table The table the record belongs to |
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| 332 | * @param mixed $uid The record's uid, [integer] or [string] (like 'NEW...') |
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| 333 | * @param array $fields The record's data, not used |
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| 334 | * @param DataHandler $tceMain TYPO3 Core Engine parent object, not used |
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| 335 | */ |
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| 336 | 2 | public function processDatamap_afterDatabaseOperations( |
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| 374 | |||
| 375 | /** |
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| 376 | * Checks whether the record is in the Index Queue and whether it has been |
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| 377 | * indexed already. |
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| 378 | * |
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| 379 | * @param string $table The table name. |
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| 380 | * @param array $record An array with record fields that may affect visibility. |
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| 381 | * @return bool True if the record is marked as being indexed |
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| 382 | */ |
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| 383 | protected function isMarkedAsIndexed($table, $record) |
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| 387 | |||
| 388 | /** |
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| 389 | * @return Queue |
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| 390 | */ |
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| 391 | 4 | private function getIndexQueue() |
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| 395 | |||
| 396 | /** |
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| 397 | * Checks whether the a frontend group field exists for the record and if so |
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| 398 | * whether groups have been removed from accessing the record thus making |
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| 399 | * the record invisible to at least some people. |
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| 400 | * |
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| 401 | * @param string $table The table name. |
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| 402 | * @param array $record An array with record fields that may affect visibility. |
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| 403 | * @return bool TRUE if frontend groups have been removed from access to the record, FALSE otherwise. |
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| 404 | */ |
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| 405 | protected function hasFrontendGroupsRemoved($table, $record) |
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| 424 | |||
| 425 | /** |
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| 426 | * Checks whether the page has been excluded from searching. |
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| 427 | * |
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| 428 | * @param array $record An array with record fields that may affect visibility. |
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| 429 | * @return bool True if the page has been excluded from searching, FALSE otherwise |
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| 430 | */ |
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| 431 | protected function isPageExcludedFromSearch($record) |
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| 435 | |||
| 436 | /** |
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| 437 | * Checks whether a page has a page type that can be indexed. |
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| 438 | * Currently standard pages and mount pages can be indexed. |
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| 439 | * |
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| 440 | * @param array $record A page record |
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| 441 | * @return bool TRUE if the page can be indexed according to its page type, FALSE otherwise |
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| 442 | */ |
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| 443 | protected function isIndexablePageType(array $record) |
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| 447 | |||
| 448 | /** |
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| 449 | * Cleans an index from garbage entries. |
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| 450 | * |
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| 451 | * Was used to clean the index from expired documents/past endtime. Solr 4.8 |
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| 452 | * introduced DocExpirationUpdateProcessor to do that job by itself. |
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| 453 | * |
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| 454 | * The method remains as a dummy for possible later cleanups and to prevent |
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| 455 | * things from breaking if others were using it. |
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| 456 | * |
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| 457 | * @deprecated since 6.0 will be removed in 7.0. deletion is done by DocExpirationUpdateProcessor |
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| 458 | * @param Site $site The site to clean indexes on |
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| 459 | * @param bool $commitAfterCleanUp Whether to commit right after the clean up, defaults to TRUE |
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| 460 | * @return void |
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| 461 | */ |
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| 462 | public function cleanIndex(Site $site, $commitAfterCleanUp = true) |
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| 466 | } |
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| 467 |
This check looks from parameters that have been defined for a function or method, but which are not used in the method body.