izzum\statemachine\persistence\PDO::insertState PHP Method

    protected function insertState(Identifier $identifier, $state, $message = null)
    {
        $connection = $this->getConnection();
        $prefix = $this->getPrefix();
        try {
            $query = 'INSERT INTO ' . $prefix . 'statemachine_entities
                (machine, entity_id, state, changetime)
                    VALUES
                (:machine, :entity_id, :state, :timestamp)';
            $statement = $connection->prepare($query);
            $machine = $identifier->getMachine();
            $entity_id = $identifier->getEntityId();
            $timestamp = $this->getTimestampForDriver();
            $statement->bindParam(":machine", $machine);
            $statement->bindParam(":entity_id", $entity_id);
            $statement->bindParam(":state", $state);
            $statement->bindParam(":timestamp", $timestamp);
            $result = $statement->execute();
            if ($result === false) {
                throw new Exception($this->getErrorInfo($statement));
            }
        } catch (\Exception $e) {
            throw new Exception(sprintf('query for inserting state failed: [%s]', $e->getMessage()), Exception::PERSISTENCE_LAYER_EXCEPTION);
        }
    }