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| <?php | |
| /** | |
| * @file | |
| * Contains \Drupal\Core\State\State. | |
| */ | |
| namespace Drupal\Core\State; | |
| use Drupal\Core\KeyValueStore\KeyValueFactoryInterface; | |
| /** | |
| * Provides the state system using a key value store. | |
| */ | |
| class State implements StateInterface { | |
| /** | |
| * The key value store to use. | |
| * | |
| * @var \Drupal\Core\KeyValueStore\KeyValueStoreInterface | |
| */ | |
| protected $keyValueStore; | |
| /** | |
| * Static state cache. | |
| * | |
| * @var array | |
| */ | |
| protected $cache = array(); | |
| /** | |
| * Constructs a State object. | |
| * | |
| * @param \Drupal\Core\KeyValueStore\KeyValueFactoryInterface $key_value_factory | |
| * The key value store to use. | |
| */ | |
| function __construct(KeyValueFactoryInterface $key_value_factory) { | |
| $this->keyValueStore = $key_value_factory->get('state'); | |
| } | |
| /** | |
| * {@inheritdoc} | |
| */ | |
| public function get($key, $default = NULL) { | |
| $values = $this->getMultiple(array($key)); | |
| return isset($values[$key]) ? $values[$key] : $default; | |
| } | |
| /** | |
| * {@inheritdoc} | |
| */ | |
| public function getMultiple(array $keys) { | |
| $values = array(); | |
| $load = array(); | |
| foreach ($keys as $key) { | |
| // Check if we have a value in the cache. | |
| if (isset($this->cache[$key])) { | |
| $values[$key] = $this->cache[$key]; | |
| } | |
| // Load the value if we don't have an explicit NULL value. | |
| elseif (!array_key_exists($key, $this->cache)) { | |
| $load[] = $key; | |
| } | |
| } | |
| if ($load) { | |
| $loaded_values = $this->keyValueStore->getMultiple($load); | |
| foreach ($load as $key) { | |
| // If we find a value, even one that is NULL, add it to the cache and | |
| // return it. | |
| if (isset($loaded_values[$key]) || array_key_exists($key, $loaded_values)) { | |
| $values[$key] = $loaded_values[$key]; | |
| $this->cache[$key] = $loaded_values[$key]; | |
| } | |
| else { | |
| $this->cache[$key] = NULL; | |
| } | |
| } | |
| } | |
| return $values; | |
| } | |
| /** | |
| * {@inheritdoc} | |
| */ | |
| public function set($key, $value) { | |
| $this->cache[$key] = $value; | |
| $this->keyValueStore->set($key, $value); | |
| } | |
| /** | |
| * {@inheritdoc} | |
| */ | |
| public function setMultiple(array $data) { | |
| foreach ($data as $key => $value) { | |
| $this->cache[$key] = $value; | |
| } | |
| $this->keyValueStore->setMultiple($data); | |
| } | |
| /** | |
| * {@inheritdoc} | |
| */ | |
| public function delete($key) { | |
| $this->deleteMultiple(array($key)); | |
| } | |
| /** | |
| * {@inheritdoc} | |
| */ | |
| public function deleteMultiple(array $keys) { | |
| foreach ($keys as $key) { | |
| unset($this->cache[$key]); | |
| } | |
| $this->keyValueStore->deleteMultiple($keys); | |
| } | |
| /** | |
| * {@inheritdoc} | |
| */ | |
| public function resetCache() { | |
| $this->cache = array(); | |
| } | |
| } |