工作纪实_02_评论的已读/未读设置

需求

​ ERP的审批流，每个审批存在多个审批节点，每个节点下有N个领导的评论以及意见，针对每个审批评论的已读未读，需要设置

难点

​ 貌似难点也不是很多，针对已读/未读的解决方案网上成熟的方案也不少

说明

​ 点击查看评论: 审批的评论设置为已读

​ 新增了一个评论：除评论人以外，所有人对该审批的评论标识都设置为未读

项目环境

3个服务一同运行，共享一个reids服务器

解决思路

​ 利用redis对每个用户每个审批设置布尔值的key-value

核心代码

	private RedisTemplate<String, Boolean> redisTemplate;
    
    @WebLog(operationType = AdminOperationType.QUERY, operationName = "读某个审批的评论")
    @GetMapping("get_audits")
    public List<WaitApprovalGroupDto> getAudits() {
        List<WaitApprovalGroupDto> audits = queryCommentList();
        ValueOperations<String, Boolean> ops = redisTemplate.opsForValue();
        audits.parallelStream().forEachOrdered(vo -> {
            String key = StringUtils.join("audit::comment::" + vo.getUserId(), "_", vo.getAuditId());
            Boolean flag = ops.get(key) == null ? true : ops.get(key);
            vo.setHasNewComment(flag);
        });
        return audits;
    }

    @WebLog(operationType = AdminOperationType.QUERY, operationName = "读某个审批的评论")
    @GetMapping("read_comment")
    public void redisRead(@RequestParam(value = "user_id") Long userId, @RequestParam(value = "audit_id") Long auditId) {
        String key = StringUtils.join("audit::comment::" + userId, "_", auditId);
        ValueOperations<String, Boolean> ops = redisTemplate.opsForValue();
        ops.set(key, false);
    }

    @WebLog(operationType = AdminOperationType.QUERY, operationName = "添加某个审批的评论")
    @GetMapping("add_comment")
    public void redisAdd(@RequestParam(value = "user_id") Long userId, @RequestParam(value = "audit_id") Long auditId) {
        String key = StringUtils.join("audit::comment::" + userId, "_", auditId);
        ValueOperations<String, Boolean> ops = redisTemplate.opsForValue();
        // 更新当用户评论的缓存状态
        ops.set(key, false);
        // 将所有涉及的审批的用户已读缓存更新为未读
        queryCommentList().stream()
                .filter(vo -> !vo.getUserId().equals(userId))
                .forEach(vo -> {
                    String userKey = StringUtils.join("audit::comment::" + vo.getUserId(), "_", auditId);
                    ops.set(userKey, true);
                });
    }

    /**
     * 模拟所有用户的审批评论信息查询
     */
    private List<WaitApprovalGroupDto> queryCommentList() {
        List<WaitApprovalGroupDto> lists = Lists.newArrayList();
        WaitApprovalGroupDto dto = new WaitApprovalGroupDto();
        dto.setId(1L);
        dto.setAuditId(1L);
        dto.setUserId(1L);
        dto.setName("审批1");
        WaitApprovalGroupDto dto2 = new WaitApprovalGroupDto();
        dto2.setId(2L);
        dto2.setUserId(2L);
        dto2.setAuditId(2L);
        dto2.setName("审批2");
        WaitApprovalGroupDto dto3 = new WaitApprovalGroupDto();
        dto3.setId(3L);
        dto3.setUserId(3L);
        dto3.setAuditId(3L);
        dto3.setName("审批3");

        WaitApprovalGroupDto dto4 = new WaitApprovalGroupDto();
        BeanUtils.copyProperties(dto, dto4);
        dto4.setAuditId(2L);
        WaitApprovalGroupDto dto5 = new WaitApprovalGroupDto();
        BeanUtils.copyProperties(dto, dto5);
        dto5.setAuditId(3L);

        WaitApprovalGroupDto dto6 = new WaitApprovalGroupDto();
        BeanUtils.copyProperties(dto2, dto6);
        dto6.setAuditId(2L);
        WaitApprovalGroupDto dto7 = new WaitApprovalGroupDto();
        BeanUtils.copyProperties(dto2, dto7);
        dto7.setAuditId(3L);

        WaitApprovalGroupDto dto8 = new WaitApprovalGroupDto();
        BeanUtils.copyProperties(dto3, dto8);
        dto8.setAuditId(2L);
        WaitApprovalGroupDto dto9 = new WaitApprovalGroupDto();
        BeanUtils.copyProperties(dto3, dto9);
        dto9.setAuditId(3L);

        lists.add(dto);
        lists.add(dto2);
        lists.add(dto3);
        lists.add(dto4);
        lists.add(dto5);
        lists.add(dto6);
        lists.add(dto7);
        lists.add(dto8);
        lists.add(dto9);
        lists.sort(Comparator.comparing(WaitApprovalGroupDto::getUserId)
                   .thenComparing(WaitApprovalGroupDto::getAuditId));
        return lists;
    }

package com.micecs.erp.module.meeting.dto;

import com.fasterxml.jackson.databind.annotation.JsonSerialize;
import com.fasterxml.jackson.databind.ser.std.ToStringSerializer;
import com.micecs.erp.module.enums.ApprovalStageEnum;

import java.math.BigDecimal;
import java.util.Date;

/**
 * @author simengyuan, [email protected]
 * @version 1.0
 */
 @Data
public class WaitApprovalGroupDto {
    private Long id;
    private String name;
    private Long auditId;
    private Boolean hasNewComment;
    private Long userId;
}

过期时间记得加上,opts.expire(30, TimeUnit.Days);