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<?php
namespace Drupal\Core\State;
use Drupal\Core\Cache\CacheBackendInterface;
use Drupal\Core\Cache\CacheCollector;
use Drupal\Core\KeyValueStore\KeyValueFactoryInterface;
use Drupal\Core\Lock\LockBackendInterface;
/**
* Provides the state system using a key value store.
*/
class State extends CacheCollector implements StateInterface {
/**
* The key value store to use.
*
* @var \Drupal\Core\KeyValueStore\KeyValueStoreInterface
*/
protected $keyValueStore;
/**
* Constructs a State object.
*
* @param \Drupal\Core\KeyValueStore\KeyValueFactoryInterface $key_value_factory
* The key value store to use.
* @param \Drupal\Core\Cache\CacheBackendInterface $cache
* The cache backend.
* @param \Drupal\Core\Lock\LockBackendInterface $lock
* The lock backend.
*/
public function __construct(KeyValueFactoryInterface $key_value_factory, CacheBackendInterface $cache, LockBackendInterface $lock) {
parent::__construct('state', $cache, $lock);
$this->keyValueStore = $key_value_factory->get('state');
}
/**
* {@inheritdoc}
*/
public function get($key, $default = NULL) {
$value = parent::get($key);
return $value !== NULL ? $value : $default;
}
/**
* {@inheritdoc}
*/
protected function resolveCacheMiss($key) {
$value = $this->keyValueStore->get($key);
$this->storage[$key] = $value;
$this->persist($key);
return $value;
}
/**
* {@inheritdoc}
*/
public function getMultiple(array $keys) {
$values = [];
foreach ($keys as $key) {
$values[$key] = $this->get($key);
}
return $values;
}
/**
* {@inheritdoc}
*/
public function set($key, $value) {
parent::set($key, $value);
$this->keyValueStore->set($key, $value);
}
/**
* {@inheritdoc}
*/
public function setMultiple(array $data) {
foreach ($data as $key => $value) {
parent::set($key, $value);
}
$this->keyValueStore->setMultiple($data);
}
/**
* {@inheritdoc}
*/
public function delete($key) {
parent::delete($key);
$this->deleteMultiple([$key]);
}
/**
* {@inheritdoc}
*/
public function deleteMultiple(array $keys) {
foreach ($keys as $key) {
parent::delete($key);
}
$this->keyValueStore->deleteMultiple($keys);
}
/**
* {@inheritdoc}
*/
public function resetCache() {
$this->clear();
}
}