private String create(final DiscoveryUpstreamDTO discoveryUpstreamDTO) {
        DiscoveryUpstreamDO discoveryUpstreamDO = DiscoveryUpstreamDO.buildDiscoveryUpstreamDO(discoveryUpstreamDTO);
        discoveryUpstreamMapper.insert(discoveryUpstreamDO);
        fetchAll(discoveryUpstreamDTO.getDiscoveryHandlerId());
        return ShenyuResultMessage.CREATE_SUCCESS;
    }
create.

@param discoveryUpstreamDTO discoveryUpstreamDTO
@return the string
shenyu-admin/src/main/java/org/apache/shenyu/admin/service/impl/DiscoveryUpstreamServiceImpl.java