How does \Magento\Framework\EntityManager\Operation\Read::execute() work?

dmitry_fedyuk · April 23, 2016, 9:34pm

Context: How does \Magento\Framework\EntityManager\EntityManager::load() work?

magento/magento2/blob/958164/app/etc/di.xml#L1180-L1180


<item name="read" xsi:type="string">Magento\Framework\EntityManager\Operation\Read</item>

github.com

magento/magento2/blob/958164/lib/internal/Magento/Framework/EntityManager/Operation/Read.php#L78-L86


/**
 * @param string $entityType
 * @param object $entity
 * @param string $identifier
 * @param array $arguments
 * @return object
 * @throws \Exception
 */
public function execute($entityType, $entity, $identifier, $arguments = [])

github.com

magento/magento2/blob/958164/lib/internal/Magento/Framework/EntityManager/Operation/Read.php#L88-L88


$metadata = $this->metadataPool->getMetadata($entityType);

Details: How does \Magento\Framework\EntityManager\MetadataPool::getMetadata() work?

github.com

magento/magento2/blob/958164/lib/internal/Magento/Framework/EntityManager/Operation/Read.php#L89-L89


$hydrator = $this->hydratorPool->getHydrator($entityType);

github.com

magento/magento2/blob/958164/lib/internal/Magento/Framework/EntityManager/HydratorPool.php#L39-L50


/**
 * @param string $entityType
 * @return EntityHydratorInterface
 */
public function getHydrator($entityType)
{
    if (isset($this->hydrators[$entityType])) {
        return $this->objectManager->get($this->hydrators[$entityType]);
    } else {
        return $this->objectManager->get(EntityHydratorInterface::class);
    }
}

github.com

magento/magento2/blob/958164/app/etc/di.xml#L11-L11


<preference for="Magento\Framework\EntityManager\EntityHydratorInterface" type="Magento\Framework\Model\Entity\Hydrator" />

github.com

magento/magento2/blob/958164/lib/internal/Magento/Framework/EntityManager/Operation/Read.php#L90-L106


$this->eventManager->dispatch(
    'entity_manager_load_before',
    [
        'entity_type' => $entityType,
        'identifier' => $identifier,
        'arguments' => $arguments
    ]
);
$this->eventManager->dispatchEntityEvent(
    $entityType,
    'load_before',
    [
        'identifier' => $identifier,
        'arguments' => $arguments
    ]
);
$entity = $this->readMain->execute($entityType, $entity, $identifier, $arguments);

Details: How does \Magento\Framework\EntityManager\Operation\Read\ReadMain::execute() work?

github.com

magento/magento2/blob/958164/lib/internal/Magento/Framework/EntityManager/Operation/Read.php#L107-L107


$entityData = $hydrator->extract($entity);

Details: How does \Magento\Framework\Model\Entity\Hydrator work?

github.com

magento/magento2/blob/958164/lib/internal/Magento/Framework/Model/Entity/Hydrator.php#L15-L22


/**
 * @param object $entity
 * @return array
 */
public function extract($entity)
{
    return $entity->getData();
}

github.com

magento/magento2/blob/958164/lib/internal/Magento/Framework/EntityManager/Operation/Read.php#L108-L111


if (isset($entityData[$metadata->getLinkField()])) {
    $entity = $this->readAttributes->execute($entityType, $entity, $arguments);
    $entity = $this->readExtensions->execute($entityType, $entity, $arguments);
}

Details:

github.com

magento/magento2/blob/958164/lib/internal/Magento/Framework/EntityManager/Operation/Read.php#L112-L129


$this->eventManager->dispatchEntityEvent(
    $entityType,
    'load_after',
    [
        'entity' => $entity,
        'arguments' => $arguments
    ]
);
$this->eventManager->dispatch(
    'entity_manager_load_after',
    [
        'entity_type' => $entityType,
        'entity' => $entity,
        'arguments' => $arguments
    ]
);


return $entity;

dmitry_fedyuk · April 23, 2016, 9:35pm