唯品会开源定时器框架Saturn

迈不过友情╰ 2022-12-11 01:25 288阅读 0赞

### 文章目录 ###

*  官网文档
 *  架构
 *   *  架构逻辑图
     *  子系统划分
 *  调度器逻辑
 *  需求设计
 *  源码解读
 *  xxl-job对比

# 官网文档 #

*  [Home][]
 *  [Saturn架构文档][Saturn]

# 架构 #

## 架构逻辑图 ##

## 子系统划分 ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl8zODMzNjY1OA_size_16_color_FFFFFF_t_70_pic_center 1]

# 调度器逻辑 #

# 需求设计 #

# 源码解读 #

**1.执行器执行任务**

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl8zODMzNjY1OA_size_16_color_FFFFFF_t_70_pic_center 4]  
执行器的写法。

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl8zODMzNjY1OA_size_16_color_FFFFFF_t_70_pic_center 5]

SaturnJavaJob doExecution 209

**2.执行job**

![加粗样式][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl8zODMzNjY1OA_size_16_color_FFFFFF_t_70_pic_center 7]

**3.超时处理**

com.vip.saturn.job.java.SaturnJavaJob\#handleJob

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl8zODMzNjY1OA_size_16_color_FFFFFF_t_70_pic_center 8]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl8zODMzNjY1OA_size_16_color_FFFFFF_t_70_pic_center 9]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl8zODMzNjY1OA_size_16_color_FFFFFF_t_70_pic_center 10]  
如果设置超时的时间，会在启动的时候开启一个定时的线程池**ScheduledThreadPoolExecutor**，当到这个超时的时间，还没执行完，就会设置这个超时状态，然后强杀线程。

**4.面试题：如何关闭线程池**

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl8zODMzNjY1OA_size_16_color_FFFFFF_t_70_pic_center 11]

# xxl-job对比 #

<table> 
 <thead> 
  <tr> 
   <th>功能</th> 
   <th>xxl-job</th> 
   <th>Saturn</th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td>执行器的管理</td> 
   <td>可以看下官网</td> 
   <td>zk节点，事件</td> 
  </tr> 
  <tr> 
   <td>分片</td> 
   <td>✔</td> 
   <td>✔</td> 
  </tr> 
  <tr> 
   <td>超时设置</td> 
   <td>✔</td> 
   <td>✔</td> 
  </tr> 
  <tr> 
   <td>调度模式</td> 
   <td>分片，故障转移，负载均衡，动态扩容</td> 
   <td>分片，故障转移，动态扩容，HA，负载均衡</td> 
  </tr> 
  <tr> 
   <td>日志</td> 
   <td>异步打印不出来</td> 
   <td>不详</td> 
  </tr> 
 </tbody> 
</table>

[Home]: https://github.com/vipshop/Saturn/wiki
[Saturn]: https://github.com/vipshop/Saturn/wiki/Saturn%E6%9E%B6%E6%9E%84%E6%96%87%E6%A1%A3
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