nextcloud / server

		$missingCacheMessage = 'Memcache {class} not available for {use} cache';

		$missingCacheHint = 'Is the matching PHP module installed and enabled?';

		if (!class_exists($localCacheClass) || !$localCacheClass::isAvailable()) {

			if (\OC::$CLI && !defined('PHPUNIT_RUN')) {

				// CLI should not hard-fail on broken memcache

				$this->logger->info($missingCacheMessage, [

					'class' => $localCacheClass,

					'use' => 'local',

					'app' => 'cli'

				]);

				$localCacheClass = self::NULL_CACHE;

			} else {

				throw new \OC\HintException(strtr($missingCacheMessage, [

					'{class}' => $localCacheClass, '{use}' => 'local'

				]), $missingCacheHint);

			}

		}

		if (!class_exists($distributedCacheClass) || !$distributedCacheClass::isAvailable()) {

			if (\OC::$CLI && !defined('PHPUNIT_RUN')) {

				// CLI should not hard-fail on broken memcache

				]), $missingCacheHint);

			}

		}

		if (!class_exists($distributedCacheClass) || !$distributedCacheClass::isAvailable()) {

			if (\OC::$CLI && !defined('PHPUNIT_RUN')) {

				// CLI should not hard-fail on broken memcache

				$this->logger->info($missingCacheMessage, [

					'class' => $distributedCacheClass,

					'use' => 'distributed',

					'app' => 'cli'

				]);

				$distributedCacheClass = self::NULL_CACHE;

			} else {

				throw new \OC\HintException(strtr($missingCacheMessage, [

					'{class}' => $distributedCacheClass, '{use}' => 'distributed'

				]), $missingCacheHint);

			}

		}

		if (!($lockingCacheClass && class_exists($distributedCacheClass) && $lockingCacheClass::isAvailable())) {

			// don't fallback since the fallback might not be suitable for storing lock

			$lockingCacheClass = self::NULL_CACHE;