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Quartz

  • 调度器：Scheduler
  • 任务：JobDetail
  • 触发器：Trigger，包括SimpleTrigger和CronTrigger

这里写图片描述

配置->数据库->调用

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// 刷新帖子分数任务
@Bean
public JobDetailFactoryBean postScoreRefreshJobDetail() {
    JobDetailFactoryBean factoryBean = new JobDetailFactoryBean();
    factoryBean.setJobClass(PostScoreRefreshJob.class);
    factoryBean.setName("postScoreRefreshJob");
    factoryBean.setGroup("communityJobGroup");
    factoryBean.setDurability(true);
    factoryBean.setRequestsRecovery(true);
    return factoryBean;
}

@Bean
public SimpleTriggerFactoryBean postScoreRefreshTrigger(JobDetail postScoreRefreshJobDetail) {
    SimpleTriggerFactoryBean factoryBean = new SimpleTriggerFactoryBean();
    factoryBean.setJobDetail(postScoreRefreshJobDetail);
    factoryBean.setName("postScoreRefreshTrigger");
    factoryBean.setGroup("communityTriggerGroup");
    factoryBean.setRepeatInterval(1000 * 60 * 5);
    factoryBean.setJobDataMap(new JobDataMap());
    return factoryBean;
}

帖子分数刷新的任务

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public class PostScoreRefreshJob implements Job, CommunityConstant {

    private static final Logger logger = LoggerFactory.getLogger(PostScoreRefreshJob.class);

    @Autowired
    private RedisTemplate redisTemplate;

    @Autowired
    private DiscussPostService discussPostService;

    @Autowired
    private LikeService likeService;

    @Autowired
    private ElasticsearchService elasticsearchService;

    // 牛客纪元
    private static final Date epoch;

    static {
        try {
            epoch = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").parse("2014-08-01 00:00:00");
        } catch (ParseException e) {
            throw new RuntimeException("初始化牛客纪元失败!", e);
        }
    }

    @Override
    public void execute(JobExecutionContext context) throws JobExecutionException {
        String redisKey = RedisKeyUtil.getPostScoreKey();
        BoundSetOperations operations = redisTemplate.boundSetOps(redisKey);

        if (operations.size() == 0) {
            logger.info("[任务取消] 没有需要刷新的帖子!");
            return;
        }

        logger.info("[任务开始] 正在刷新帖子分数: " + operations.size());
        while (operations.size() > 0) {
            this.refresh((Integer) operations.pop());
        }
        logger.info("[任务结束] 帖子分数刷新完毕!");
    }

    private void refresh(int postId) {
        DiscussPost post = discussPostService.findDiscussPostById(postId);

        if (post == null) {
            logger.error("该帖子不存在: id = " + postId);
            return;
        }

        // 是否精华
        boolean wonderful = post.getStatus() == 1;
        // 评论数量
        int commentCount = post.getCommentCount();
        // 点赞数量
        long likeCount = likeService.findEntityLikeCount(ENTITY_TYPE_POST, postId);

        // 计算权重
        double w = (wonderful ? 75 : 0) + commentCount * 10 + likeCount * 2;
        // 分数 = 帖子权重 + 距离天数
        double score = Math.log10(Math.max(w, 1))
                + (post.getCreateTime().getTime() - epoch.getTime()) / (1000 * 3600 * 24);
        // 更新帖子分数
        discussPostService.updateScore(postId, score);
        // 同步搜索数据
        post.setScore(score);
        elasticsearchService.saveDiscussPost(post);
    }

}

计算帖子分数

log(评论数10+点赞数2)+现在时间-牛客纪元

点赞

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    public String like(int entityType, int entityId, int entityUserId, int postId) {
{
...

if(entityType == ENTITY_TYPE_POST) {
    // 计算帖子分数
    String redisKey = RedisKeyUtil.getPostScoreKey();
    redisTemplate.opsForSet().add(redisKey, postId);
}
}

评论

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// 计算帖子分数
String redisKey = RedisKeyUtil.getPostScoreKey();
redisTemplate.opsForSet().add(redisKey, discussPostId);