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<?php |
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declare(strict_types=1); |
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namespace Doctrine\ORM\Sequencing\Generator; |
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use Doctrine\ORM\EntityManagerInterface; |
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use Serializable; |
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use function serialize; |
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use function unserialize; |
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/** |
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* Represents an ID generator that uses a database sequence. |
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*/ |
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class SequenceGenerator implements Generator, Serializable |
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{ |
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/** |
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* The allocation size of the sequence. |
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* |
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* @var int |
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*/ |
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private $allocationSize; |
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/** |
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* The name of the sequence. |
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* |
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* @var string |
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*/ |
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private $sequenceName; |
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/** @var int */ |
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private $nextValue = 0; |
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/** @var int|null */ |
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private $maxValue; |
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public function __construct(string $sequenceName, int $allocationSize) |
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{ |
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$this->sequenceName = $sequenceName; |
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$this->allocationSize = $allocationSize; |
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} |
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public function getSequenceName() : string |
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{ |
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return $this->sequenceName; |
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} |
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public function getAllocationSize() : int |
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{ |
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return $this->allocationSize; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function generate(EntityManagerInterface $em, ?object $entity) |
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{ |
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if ($this->maxValue === null || $this->nextValue === $this->maxValue) { |
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// Allocate new values |
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$conn = $em->getConnection(); |
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$sql = $conn->getDatabasePlatform()->getSequenceNextValSQL($this->sequenceName); |
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// Using `query` to force usage of the master server in MasterSlaveConnection |
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$this->nextValue = (int) $conn->query($sql)->fetchColumn(); |
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$this->maxValue = $this->nextValue + $this->allocationSize; |
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} |
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return $this->nextValue++; |
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} |
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/** |
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* Gets the maximum value of the currently allocated bag of values. |
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*/ |
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public function getCurrentMaxValue() : ?int |
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{ |
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return $this->maxValue; |
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} |
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/** |
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* Gets the next value that will be returned by generate(). |
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*/ |
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public function getNextValue() : int |
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{ |
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return $this->nextValue; |
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} |
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public function serialize() : string |
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{ |
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return serialize( |
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[ |
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'allocationSize' => $this->allocationSize, |
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'sequenceName' => $this->sequenceName, |
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] |
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); |
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} |
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/** |
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* @param string $serialized |
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*/ |
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public function unserialize($serialized) : void |
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{ |
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$array = unserialize($serialized); |
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$this->sequenceName = $array['sequenceName']; |
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$this->allocationSize = $array['allocationSize']; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function isPostInsertGenerator() : bool |
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{ |
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return false; |
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} |
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} |
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doctrine /
orm
