java - 使用 Spring JDBC 模板在单个事务中执行多个查询(插入和更新)

Question

我正在尝试更新表 A 中的一行并在表 B 中插入一行。这需要在单次调用中发生。我正在使用 spring JDBC 来实现这一点。

示例代码

@Transactional
    public boolean approveTenant(ApproveTenantRequest approveTenantRequest) throws ApplicationException {
        LogUtil.debug(logger, "UserManagementDAO - approveTenant - Start");
        try {
            String updateSQL = "UPDATE tenant_master SET isactive=1, last_modified_by=:lastModifiedBy, last_modified_at= now() "
                    + " WHERE tenant_id=:tenantid and tenant_community_id=:cmntId";
            MapSqlParameterSource parameters = new MapSqlParameterSource();
            parameters.addValue("cmntId", approveTenantRequest.getCommunityId());
            parameters.addValue("tenantid", Integer.parseInt(approveTenantRequest.getTenantId()));
            parameters.addValue("lastModifiedBy", approveTenantRequest.getApprovedBy());
            int updateEffectedRows = jdbcTemplate.update(updateSQL, parameters);
            if(updateEffectedRows==1) {
                String insertSql= "INSERT INTO users (username,password,isactive,community_id,userrole,created_by)" + 
                        " values (:username,:password,1,:community_id,:userrole,:created_by)";
                parameters.addValue("username", approveTenantRequest.getEmailId());
                parameters.addValue("password", approveTenantRequest.getEmailId());
                parameters.addValue("community_id", approveTenantRequest.getCommunityId());
                parameters.addValue("userrole", "RESIDENT");
                parameters.addValue("created_by", approveTenantRequest.getApprovedBy());
                int insertEffectedRows = jdbcTemplate.update(insertSql, parameters);
                LogUtil.debug(logger, "UserManagementDAO - approveTenant - End");
                return insertEffectedRows == 0 ? false : true;
            }else {
                throw new ApplicationException("Issue in Approving Tenant, Tenant not exist in master data");
            }
        } catch (DataAccessException dataAccessException) {
            logger.error("Data Access Exception " + dataAccessException);
            throw new ApplicationException(dataAccessException.getMessage());
        } catch (Exception e) {
            logger.error("Exception Occured While approving tenant " + e);
            throw new ApplicationException(e.getMessage());
        }
    }

这段代码有什么缺陷吗？这是正确的做法吗？你能推荐一下吗？

Answer 1

只需确保将它们放在标记为 @Transactional 的一个方法下即可。

这样，当第二次更新失败时，第一次更新将回滚，您将使数据库保持一致状态。