izzum\statemachine\persistence\Redis::processGetState PHP Méthode

    public function processGetState(Identifier $identifier)
    {
        $redis = $this->getRedis();
        try {
            //get state from key
            $key = sprintf(self::KEY_ENTITY_STATE, $identifier->getMachine(), $identifier->getEntityId());
            $state = $redis->get($key);
        } catch (\Exception $e) {
            throw new Exception(sprintf('getting current state failed: [%s]', $e->getMessage()), Exception::PERSISTENCE_LAYER_EXCEPTION);
        }
        if (!$state) {
            throw new Exception(sprintf('no state found for [%s]. ' . 'Did you "$machine->add()" it to the persistence layer?', $identifier->getId(true)), Exception::PERSISTENCE_LAYER_EXCEPTION);
        }
        return $state;
    }