function StorageComparer::__construct

Constructs the Configuration storage comparer.

Parameters

\Drupal\Core\Config\StorageInterface $source_storage: Storage object used to read configuration.

\Drupal\Core\Config\StorageInterface $target_storage: Storage object used to write configuration.

File

core/lib/Drupal/Core/Config/StorageComparer.php, line 92

Class

StorageComparer

Defines a config storage comparer.

Namespace

Code

public function __construct(StorageInterface $source_storage, StorageInterface $target_storage) {
    if ($source_storage->getCollectionName() !== StorageInterface::DEFAULT_COLLECTION) {
        $source_storage = $source_storage->createCollection(StorageInterface::DEFAULT_COLLECTION);
    }
    if ($target_storage->getCollectionName() !== StorageInterface::DEFAULT_COLLECTION) {
        $target_storage = $target_storage->createCollection(StorageInterface::DEFAULT_COLLECTION);
    }
    // Wrap the storages in a static cache so that multiple reads of the same
    // raw configuration object are not costly.
    $this->sourceCacheStorage = new MemoryBackend();
    $this->sourceStorage = new CachedStorage($source_storage, $this->sourceCacheStorage);
    $this->targetCacheStorage = new MemoryBackend();
    $this->targetStorage = new CachedStorage($target_storage, $this->targetCacheStorage);
    $this->changelist[StorageInterface::DEFAULT_COLLECTION] = $this->getEmptyChangelist();
}