一 API分析

1 请求

POST /ware/purchase/done

2 请求参数

{
    id: 123, //采购单id
    items: [{
        itemId: 1,
        status: 4,
        reason: ""
    }] //完成/失败的需求详情
}

3 响应数据

{
    "msg": "success",
    "code": 0
}

二实现

1 PurchaseController

/** 
* 功能描述：完成采购单
*
* @param doneVo 请求参数
* @return R 返回给前端的数据
* @author cakin
* @date 2020/11/11
* @description:
*/
@PostMapping("/done")
public R finish(@RequestBody PurchaseDoneVo doneVo) {
    purchaseService.done(doneVo);
    return R.ok();
}

2 PurchaseDoneVo

/**
* @className: PurchaseDoneVo
* @description: 完成采购单请求Vo
* @date: 2020/11/11
* @author: cakin
*/
@Data
public class PurchaseDoneVo {
    /**
     * 采购单id
     */
    @NotNull
    private Long id;
    private List<PurchaseItemDoneVo> items;
}

3 PurchaseItemDoneVo

/**
* @className: PurchaseItemDoneVo
* @description: 完成采购单采购需求Vo
* @date: 2020/11/11
* @author: cakin
*/
@Data
public class PurchaseItemDoneVo {
    /**
     * 采购需求
     */
    private Long itemId;
    /**
     * 采购需求状态
     */
    private Integer status;
    /**
     * 未完成原因
     */
    private String reason;
}

4 PurchaseServiceImpl

/**
* 功能描述：完成采购单服务
*
* @param doneVo 请求Vo
* @author cakin
* @date 2020/11/11
*/
@Transactional
@Override
public void done(PurchaseDoneVo doneVo) {
    // 采购单id
    Long id = doneVo.getId();
    // 1 改变采购项的状态
    Boolean flag = true;
    // 得到采购需求的请求
    List<PurchaseItemDoneVo> items = doneVo.getItems();
    List<PurchaseDetailEntity> updates = new ArrayList<>();
    // 遍历采购需求
    for (PurchaseItemDoneVo item : items) {
        PurchaseDetailEntity detailEntity = new PurchaseDetailEntity();
        // 采购需求失败情况
        if (item.getStatus() == WareConstant.PurchaseDetailStatusEnum.HASERROR.getCode()) {
            flag = false;
            // 采购单失败状态
            detailEntity.setStatus(item.getStatus());
        } else { // 采购需求成功情况
            // 采购单成功状态
            detailEntity.setStatus(WareConstant.PurchaseDetailStatusEnum.FINISH.getCode());
            // 2 将成功采购需求的进行入库
            // 采购需求入库
            PurchaseDetailEntity entity = detailService.getById(item.getItemId());
            wareSkuService.addStock(entity.getSkuId(), entity.getWareId(), entity.getSkuNum());
        }
        detailEntity.setId(item.getItemId());
        updates.add(detailEntity);
    }
    // 更新采购需求
    detailService.updateBatchById(updates);
    // 3 改变采购单状态
    PurchaseEntity purchaseEntity = new PurchaseEntity();
    purchaseEntity.setId(id);
    purchaseEntity.setStatus(flag ? WareConstant.PurchaseStatusEnum.FINISH.getCode() : WareConstant.PurchaseStatusEnum.HASERROR.getCode());
    purchaseEntity.setUpdateTime(new Date());
    // 更新采购单状态
    this.updateById(purchaseEntity);
}

5 WareSkuServiceImpl

/**
* 功能描述：添加库存
*
* @param skuId  skuId
* @param wareId 仓库Id
* @param skuNum sku数量
* @author cakin
* @date 2020/11/11
*/
@Override
public void addStock(Long skuId, Long wareId, Integer skuNum) {
    // 1 判断如果还没有这个库存，新增库存
    List<WareSkuEntity> entities = wareSkuDao.selectList(new QueryWrapper<WareSkuEntity>()
            .eq("sku_id", skuId)
            .eq("ware_id", wareId));
    if (entities == null || entities.size() == 0) {
        WareSkuEntity skuEntity = new WareSkuEntity();
        skuEntity.setSkuId(skuId);
        skuEntity.setStock(skuNum);
        skuEntity.setWareId(wareId);
        skuEntity.setStockLocked(0);
        // TODO 远程查询sku的名字，如果失败，整个事务无需回滚
        // 1 自己catch异常
        // TODO 还可以用什么办法让异常出现以后不回滚？高级
        try {
            R info = productFeignService.info(skuId);
            Map<String, Object> data = (Map<String, Object>) info.get("skuInfo");
            if (info.getCode() == 0) {
                skuEntity.setSkuName((String) data.get("skuName"));
            }
        } catch (Exception e) {
        }
        wareSkuDao.insert(skuEntity);
    } else {
        // 更新库存数量
        wareSkuDao.addStock(skuId, wareId, skuNum);
    }
}

6 ProductFeignService

@FeignClient("gulimall-product")
public interface {
    /**
     * 功能描述：远程调用商品微服务
     *
     * @author cakin
     * @date 2020/11/11
     * @param skuId skuId
     * @return R 远程服务返回数据
     * @description:
     *   1)、让所有请求过网关；
     *          1、@FeignClient("gulimall-gateway")：给gulimall-gateway所在的机器发请求
     *          2、/api/product/skuinfo/info/{skuId}
     *   2）、直接让后台指定服务处理
     *          1、@FeignClient("gulimall-gateway")
     *          2、/product/skuinfo/info/{skuId}
     */
    @RequestMapping("/product/skuinfo/info/{skuId}")
    R info(@PathVariable("skuId") Long skuId);
}