字符串String实战之商品对象信息缓存管理之修改与删除

stringService.java

    //修改@Transactional(rollbackFor = Exception.class)public Integer update(Item item) throws  Exception{int res = itemMapper.updateByPrimaryKeySelective(item);//数据库修改成功，也同时往cache写一份。保证双写一致性if(res > 0){//利用ObjectMapper将结果转换成字符串格式redisTemplate.opsForValue().set(Constant.RedisStringPrefix+item.getId(), objectMapper.writeValueAsString(item));}return  item.getId();}//删除public Integer delete(final Integer id) throws Exception{int res = itemMapper.deleteByPrimaryKey(id);//数据库中删除了以后，缓存中也需要删除if(res > 0){redisTemplate.delete(Constant.RedisStringPrefix+id);}return 1;}

stringController.java

   //修改@RequestMapping(value = "update", method = RequestMethod.POST, consumes = MediaType.APPLICATION_JSON_UTF8_VALUE)public BaseResponse update(@RequestBody @Validated Item item, BindingResult result){String checkRes = ValidatorUtil.checkResult(result);if(StringUtils.isNotBlank(checkRes)){return new BaseResponse(StatusCode.InvalidParams.getCode(), checkRes);}BaseResponse response = new BaseResponse(StatusCode.Success);try{response.setData(stringService.update(item));}catch (Exception e){log.error("商品对象信息的管理-缓存-修改-异常信息: ", e);response = new BaseResponse(StatusCode.Fail.getCode(), e.getMessage());}return response;}//删除@RequestMapping(value = "delete", method = RequestMethod.POST)public BaseResponse update(@RequestParam Integer id){if(id <= 0){return new BaseResponse(StatusCode.InvalidParams);}BaseResponse response = new BaseResponse(StatusCode.Success);try{response.setData(stringService.delete(id));}catch (Exception e){log.error("商品对象信息的管理-缓存-删除-异常信息: ", e);response = new BaseResponse(StatusCode.Fail.getCode(), e.getMessage());}return response;}