如何写出优雅的代码

如何写出优雅的代码

如何写出优雅的代码，在我看来 首先就是要 调理清晰，单一原则，一个方法只做一件事，一步一步走。

代码实例

    @Transactional(rollbackFor = Exception.class)
    @Override
    public Boolean copyFlow(FlowCopyDTO flowCopyDTO) {
        Long flowId = flowCopyDTO.getFlowId();
        SrmFlow flow = getById(flowId);
        CustomAssert.isTrue(null != flow,"流程不存在");
        CustomAssert.isTrue(Objects.equals(FlowSourceEnum.PLATFORM.getCode(),flow.getSource()),"只有平台级流程才允许被复制");
        Integer flowType = flow.getFlowType();
        // 采购执行规则
        if(Objects.equals(FlowTypeEnum.PURCHASE_EXECUTION.getCode(),flowType)){
            copyPurchaseExecution(flow,flowCopyDTO);
        }
        // 供应商管理配置的规则通过
        if(Objects.equals(FlowTypeEnum.SUPPLIER_MANAGEMENT.getCode(),flowType)){
            copySupplierManagement(flow,flowCopyDTO);
        }
        return true;
    }

    @Override
    public FlowTO detailFlow(FlowDetailDTO dto) {
        FlowTO flow = flowConvert.toFlowTO(baseMapper.selectByFlowIdAndOrgId(dto.getId(), dto.getOrganizationId()));
        flow.setFlowTypeName(FlowTypeEnum.getFlowTypeEnum(flow.getFlowType()).getDesc());
        flow.setCntTypeName(CntTypeEnum.getByCode(flow.getCntType()).getDesc());
        flow.setSourceName(FlowSourceEnum.getEnumByCode(flow.getSource()).getDesc());
        flow.setCompanyList(flowCompanyConvert.toFlowCompanyTOList(srmFlowCompanyService.getFlowCompanyList(dto.getId())));
        return flow;
    }

    /**
     * copy 供应商管理配置
     * @param flow
     * @param flowCopyDTO
     */
    private void  copySupplierManagement(SrmFlow flow,FlowCopyDTO flowCopyDTO){
        // 供应商管理配置的规则通过 流程分类+公司维度 两个条件控制唯一性，
        // 即在同一个租户的公司维度下，同一个公司仅允许存在1条规则配置流程
        String companyIds = flowCopyDTO.getCompanyIds();
        if(StringUtils.isNotBlank(companyIds)){
            Set<Long> companyIdList = Arrays.stream(companyIds.split(","))
                    .map(Long::valueOf)
                    .collect(Collectors.toSet());
            Long organizationId = flowCopyDTO.getOrganizationId();
            Long flowId = flowCopyDTO.getFlowId();
            LambdaQueryWrapper<SrmFlowCompany> lambdaQueryWrapper = Wrappers.lambdaQuery(SrmFlowCompany.class)
                    .eq(SrmFlowCompany::getFlowId, flowId)
                    .eq(SrmFlowCompany::getOrganizationId, organizationId)
                    .in(SrmFlowCompany::getCompanyId, companyIdList);
            long count = srmFlowCompanyService.count(lambdaQueryWrapper);
            CustomAssert.isTrue(count <= 0,"同一个公司也仅允许存在1条规则配置流程");
        }
        copy(flow,flowCopyDTO);
    }

    /**
     * copy采购执行规则
     * @param flow
     * @param flowCopyDTO
     */
    private void copyPurchaseExecution(SrmFlow flow,FlowCopyDTO flowCopyDTO){
        //同一个租户，来源为“租户级”的只允许复制/创建一条采购执行规则配置
        Long organizationId = flowCopyDTO.getOrganizationId();
        LambdaQueryWrapper<SrmFlow> lambdaQueryWrapper = new LambdaQueryWrapper<>();
        lambdaQueryWrapper.eq(SrmFlow::getOrganizationId,organizationId);
        lambdaQueryWrapper.eq(SrmFlow::getFlowType,FlowTypeEnum.PURCHASE_EXECUTION.getCode());
        long count = count(lambdaQueryWrapper);
        CustomAssert.isTrue(count <= 0,"同一个租户的只允许创建一条采购执行规则");
        copy(flow,flowCopyDTO);
    }

    /**
     * 复制数据
     * @param flow
     * @param flowCopyDTO
     */
    private void copy(SrmFlow flow,FlowCopyDTO flowCopyDTO){
        // 复制流程
        Long flowId = flow.getId();
        SrmFlow newFlow = copyFlow(flow, flowCopyDTO);
        // 复制公司
        copyFlowCompany(flowId,newFlow,flowCopyDTO);
        // 复制节点
        Map<String, Long> flowIdNodeIdAndIdMap = copyFlowNode(flowId, newFlow, flowCopyDTO);
        // 复制规则执行配置数据
        copyFlowNodeRuleData(flowId,newFlow,flowCopyDTO,flowIdNodeIdAndIdMap);
        // 复制流程规则
        copyFlowRule(flowId,newFlow,flowCopyDTO,flowIdNodeIdAndIdMap);
        // 复制流程规则配置
        copyFlowRuleConfig(flowId,newFlow,flowCopyDTO,flowIdNodeIdAndIdMap);
    }

@Transactional(rollbackFor = Exception.class)
 public void insert(CakeOrderDO entity) {
        //创建订单
        saveOrder(entity);
        //创建订单项
        saveOrderItems(entity);
        //收货地址
        saveDeliveryAddress(entity);
        //物流信息
        saveDeliveryOrder(entity);
        //订单日志
        saveOrderStatusHistory(entity);
    }

思考

一辈子只做一件事 也很酷！

彩蛋