doctrine /
mongodb-odm
Complex classes like SchemaManager 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 SchemaManager, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 19 | class SchemaManager |
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| 20 | { |
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| 21 | private const GRIDFS_FILE_COLLECTION_INDEX = ['files_id' => 1, 'n' => 1]; |
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| 22 | |||
| 23 | private const GRIDFS_CHUNKS_COLLECTION_INDEX = ['filename' => 1, 'uploadDate' => 1]; |
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| 24 | |||
| 25 | private const CODE_SHARDING_ALREADY_INITIALIZED = 23; |
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| 26 | |||
| 27 | /** @var DocumentManager */ |
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| 28 | protected $dm; |
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| 29 | |||
| 30 | /** @var ClassMetadataFactory */ |
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| 31 | protected $metadataFactory; |
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| 32 | |||
| 33 | 1696 | public function __construct(DocumentManager $dm, ClassMetadataFactory $cmf) |
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| 34 | { |
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| 35 | 1696 | $this->dm = $dm; |
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| 36 | 1696 | $this->metadataFactory = $cmf; |
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| 37 | 1696 | } |
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| 38 | |||
| 39 | /** |
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| 40 | * Ensure indexes are created for all documents that can be loaded with the |
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| 41 | * metadata factory. |
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| 42 | */ |
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| 43 | 1 | public function ensureIndexes(?int $timeout = null) : void |
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| 44 | { |
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| 45 | 1 | foreach ($this->metadataFactory->getAllMetadata() as $class) { |
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| 46 | 1 | if ($class->isMappedSuperclass || $class->isEmbeddedDocument || $class->isQueryResultDocument) { |
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| 47 | 1 | continue; |
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| 48 | } |
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| 49 | |||
| 50 | 1 | $this->ensureDocumentIndexes($class->name, $timeout); |
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| 51 | } |
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| 52 | 1 | } |
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| 53 | |||
| 54 | /** |
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| 55 | * Ensure indexes exist for all mapped document classes. |
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| 56 | * |
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| 57 | * Indexes that exist in MongoDB but not the document metadata will be |
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| 58 | * deleted. |
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| 59 | */ |
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| 60 | public function updateIndexes(?int $timeout = null) : void |
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| 61 | { |
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| 62 | foreach ($this->metadataFactory->getAllMetadata() as $class) { |
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| 63 | if ($class->isMappedSuperclass || $class->isEmbeddedDocument || $class->isQueryResultDocument) { |
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| 64 | continue; |
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| 65 | } |
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| 66 | |||
| 67 | $this->updateDocumentIndexes($class->name, $timeout); |
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| 68 | } |
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| 69 | } |
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| 70 | |||
| 71 | /** |
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| 72 | * Ensure indexes exist for the mapped document class. |
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| 73 | * |
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| 74 | * Indexes that exist in MongoDB but not the document metadata will be |
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| 75 | * deleted. |
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| 76 | * |
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| 77 | * @throws InvalidArgumentException |
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| 78 | */ |
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| 79 | 3 | public function updateDocumentIndexes(string $documentName, ?int $timeout = null) : void |
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| 80 | { |
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| 81 | 3 | $class = $this->dm->getClassMetadata($documentName); |
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| 82 | |||
| 83 | 3 | if ($class->isMappedSuperclass || $class->isEmbeddedDocument || $class->isQueryResultDocument) { |
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| 84 | throw new InvalidArgumentException('Cannot update document indexes for mapped super classes, embedded documents or aggregation result documents.'); |
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| 85 | } |
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| 86 | |||
| 87 | 3 | $documentIndexes = $this->getDocumentIndexes($documentName); |
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| 88 | 3 | $collection = $this->dm->getDocumentCollection($documentName); |
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| 89 | 3 | $mongoIndexes = iterator_to_array($collection->listIndexes()); |
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| 90 | |||
| 91 | /* Determine which Mongo indexes should be deleted. Exclude the ID index |
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| 92 | * and those that are equivalent to any in the class metadata. |
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| 93 | */ |
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| 94 | 3 | $self = $this; |
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| 95 | $mongoIndexes = array_filter($mongoIndexes, static function (IndexInfo $mongoIndex) use ($documentIndexes, $self) { |
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| 96 | 1 | if ($mongoIndex['name'] === '_id_') { |
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| 97 | return false; |
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| 98 | } |
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| 99 | |||
| 100 | 1 | foreach ($documentIndexes as $documentIndex) { |
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| 101 | 1 | if ($self->isMongoIndexEquivalentToDocumentIndex($mongoIndex, $documentIndex)) { |
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| 102 | 1 | return false; |
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| 103 | } |
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| 104 | } |
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| 105 | |||
| 106 | 1 | return true; |
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| 107 | 3 | }); |
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| 108 | |||
| 109 | // Delete indexes that do not exist in class metadata |
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| 110 | 3 | foreach ($mongoIndexes as $mongoIndex) { |
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| 111 | 1 | if (! isset($mongoIndex['name'])) { |
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| 112 | continue; |
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| 113 | } |
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| 114 | |||
| 115 | 1 | $collection->dropIndex($mongoIndex['name']); |
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| 116 | } |
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| 117 | |||
| 118 | 3 | $this->ensureDocumentIndexes($documentName, $timeout); |
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| 119 | 3 | } |
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| 120 | |||
| 121 | 23 | public function getDocumentIndexes(string $documentName) : array |
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| 126 | |||
| 127 | 23 | private function doGetDocumentIndexes(string $documentName, array &$visited) : array |
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| 128 | { |
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| 129 | 23 | if (isset($visited[$documentName])) { |
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| 130 | 1 | return []; |
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| 185 | |||
| 186 | 23 | private function prepareIndexes(ClassMetadata $class) : array |
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| 213 | |||
| 214 | /** |
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| 215 | * Ensure the given document's indexes are created. |
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| 216 | * |
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| 217 | * @throws InvalidArgumentException |
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| 218 | */ |
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| 219 | 19 | public function ensureDocumentIndexes(string $documentName, ?int $timeoutMs = null) : void |
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| 247 | |||
| 248 | /** |
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| 249 | * Delete indexes for all documents that can be loaded with the |
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| 250 | * metadata factory. |
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| 251 | */ |
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| 252 | 1 | public function deleteIndexes() : void |
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| 262 | |||
| 263 | /** |
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| 264 | * Delete the given document's indexes. |
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| 265 | * |
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| 266 | * @throws InvalidArgumentException |
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| 267 | */ |
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| 268 | 2 | public function deleteDocumentIndexes(string $documentName) : void |
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| 277 | |||
| 278 | /** |
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| 279 | * Create all the mapped document collections in the metadata factory. |
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| 280 | */ |
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| 281 | 1 | public function createCollections() : void |
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| 290 | |||
| 291 | /** |
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| 292 | * Create the document collection for a mapped class. |
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| 293 | * |
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| 294 | * @throws InvalidArgumentException |
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| 295 | */ |
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| 296 | 5 | public function createDocumentCollection(string $documentName) : void |
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| 320 | |||
| 321 | /** |
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| 322 | * Drop all the mapped document collections in the metadata factory. |
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| 323 | */ |
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| 324 | 1 | public function dropCollections() : void |
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| 334 | |||
| 335 | /** |
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| 336 | * Drop the document collection for a mapped class. |
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| 337 | * |
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| 338 | * @throws InvalidArgumentException |
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| 339 | */ |
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| 340 | 5 | public function dropDocumentCollection(string $documentName) : void |
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| 355 | |||
| 356 | /** |
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| 357 | * Drop all the mapped document databases in the metadata factory. |
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| 358 | */ |
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| 359 | 1 | public function dropDatabases() : void |
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| 369 | |||
| 370 | /** |
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| 371 | * Drop the document database for a mapped class. |
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| 372 | * |
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| 373 | * @throws InvalidArgumentException |
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| 374 | */ |
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| 375 | 2 | public function dropDocumentDatabase(string $documentName) : void |
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| 384 | |||
| 385 | /** |
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| 386 | * Determine if an index returned by MongoCollection::getIndexInfo() can be |
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| 387 | * considered equivalent to an index in class metadata. |
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| 388 | * |
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| 389 | * Indexes are considered different if: |
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| 390 | * |
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| 391 | * (a) Key/direction pairs differ or are not in the same order |
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| 392 | * (b) Sparse or unique options differ |
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| 393 | * (c) Mongo index is unique without dropDups and mapped index is unique |
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| 394 | * with dropDups |
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| 395 | * (d) Geospatial options differ (bits, max, min) |
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| 396 | * (e) The partialFilterExpression differs |
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| 397 | * |
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| 398 | * Regarding (c), the inverse case is not a reason to delete and |
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| 399 | * recreate the index, since dropDups only affects creation of |
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| 400 | * the unique index. Additionally, the background option is only |
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| 401 | * relevant to index creation and is not considered. |
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| 402 | * |
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| 403 | * @param array|IndexInfo $mongoIndex Mongo index data. |
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| 404 | */ |
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| 405 | 47 | public function isMongoIndexEquivalentToDocumentIndex($mongoIndex, array $documentIndex) : bool |
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| 461 | |||
| 462 | /** |
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| 463 | * Determine if the keys for a MongoDB index can be considered equivalent to |
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| 464 | * those for an index in class metadata. |
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| 465 | * |
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| 466 | * @param array|IndexInfo $mongoIndex Mongo index data. |
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| 467 | */ |
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| 468 | 47 | private function isEquivalentIndexKeys($mongoIndex, array $documentIndex) : bool |
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| 492 | |||
| 493 | /** |
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| 494 | * Determine if the text index weights for a MongoDB index can be considered |
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| 495 | * equivalent to those for an index in class metadata. |
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| 496 | * |
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| 497 | * @param array|IndexInfo $mongoIndex Mongo index data. |
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| 498 | */ |
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| 499 | 14 | private function isEquivalentTextIndexWeights($mongoIndex, array $documentIndex) : bool |
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| 524 | |||
| 525 | /** |
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| 526 | * Ensure collections are sharded for all documents that can be loaded with the |
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| 527 | * metadata factory. |
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| 528 | * |
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| 529 | * @throws MongoDBException |
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| 530 | */ |
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| 531 | public function ensureSharding() : void |
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| 541 | |||
| 542 | /** |
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| 543 | * Ensure sharding for collection by document name. |
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| 544 | * |
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| 545 | * @throws MongoDBException |
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| 546 | */ |
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| 547 | 11 | public function ensureDocumentSharding(string $documentName) : void |
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| 566 | |||
| 567 | /** |
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| 568 | * Enable sharding for database which contains documents with given name. |
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| 569 | * |
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| 570 | * @throws MongoDBException |
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| 571 | */ |
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| 572 | 11 | public function enableShardingForDbByDocumentName(string $documentName) : void |
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| 588 | |||
| 589 | 11 | private function runShardCollectionCommand(string $documentName) : array |
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| 603 | |||
| 604 | 2 | private function ensureGridFSIndexes(ClassMetadata $class) : void |
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| 609 | |||
| 610 | 2 | private function ensureChunksIndex(ClassMetadata $class) : void |
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| 621 | |||
| 622 | 2 | private function ensureFilesIndex(ClassMetadata $class) : void |
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| 633 | |||
| 634 | 11 | private function collectionIsSharded(string $documentName) : bool |
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| 647 | } |
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| 648 |
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This check marks implicit conversions of arrays to boolean values in a comparison. While in PHP an empty array is considered to be equal (but not identical) to false, this is not always apparent.
Consider making the comparison explicit by using
empty(..)or! empty(...)instead.