public static function ClientFactory::getClientInterface in Redis 8

Lazy instantiates client proxy depending on the actual configuration.

If you are using a lock or cache backend using one of the Redis client implementations, this will be overridden at early bootstrap phase and configuration will be ignored.

Return value

ClientInterface

File

src/ClientFactory.php, line 99

Class

ClientFactory

Common code and client singleton, for all Redis clients.

Namespace

Drupal\redis

Code

public static function getClientInterface() {
  if (!isset(self::$_clientInterface)) {
    $settings = Settings::get('redis.connection', []);
    if (!empty($settings['interface'])) {
      $className = self::getClass(self::REDIS_IMPL_CLIENT, $settings['interface']);
      self::$_clientInterface = new $className();
    }
    elseif (class_exists('Predis\\Client')) {

      // Transparent and arbitrary preference for Predis library.
      $className = self::getClass(self::REDIS_IMPL_CLIENT, 'Predis');
      self::$_clientInterface = new $className();
    }
    elseif (class_exists('Redis')) {

      // Fallback on PhpRedis if available.
      $className = self::getClass(self::REDIS_IMPL_CLIENT, 'PhpRedis');
      self::$_clientInterface = new $className();
    }
    else {
      if (!isset(self::$_clientInterface)) {
        throw new \Exception("No client interface set.");
      }
    }
  }
  return self::$_clientInterface;
}