SynchronizableInterface.php

<?php

namespace Drupal\Core\Entity;


/**
 * Defines methods for an entity that supports synchronization.
 */
interface SynchronizableInterface extends EntityInterface {
    
    /**
     * Sets the status of the synchronization flag.
     *
     * @param bool $status
     *   The status of the synchronization flag.
     *
     * @return $this
     */
    public function setSyncing($status);
    
    /**
     * Returns whether this entity is being changed as part of a synchronization.
     *
     * If you are writing code that responds to a change in this entity (insert,
     * update, delete, presave, etc.), and your code would result in a change to
     * this entity itself, a configuration change (whether related to this entity,
     * another entity, or non-entity configuration), you need to check and see if
     * this entity change is part of a synchronization process, and skip executing
     * your code if that is the case.
     *
     * For example, \Drupal\node\Entity\NodeType::postSave() adds the default body
     * field to newly created node type configuration entities, which is a
     * configuration change. You would not want this code to run during an import,
     * because imported entities were already given the body field when they were
     * originally created, and the imported configuration includes all of their
     * currently-configured fields. On the other hand,
     * \Drupal\field\Entity\FieldStorageConfig::preSave() and the methods it calls
     * make sure that the storage tables are created or updated for the field
     * storage configuration entity, which is not a configuration change, and it
     * must be done whether due to an import or not. So, the first method should
     * check $entity->isSyncing() and skip executing if it returns TRUE, and the
     * second should not perform this check.
     *
     * @return bool
     *   TRUE if the configuration entity is being created, updated, or deleted
     *   through a synchronization process.
     */
    public function isSyncing();

}