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在线人数计数问题 #408

Closed GoogleCodeExporter closed 9 years ago

GoogleCodeExporter commented 9 years ago 
在 GAE 生产环境上，HttpSessionListener#sessionDestroyed 
是不会被调用的，导致在线人数只增不减。

为了兼容 GAE 和本地容器，考虑不基于 HttpSessionListener 
实现计数维护：

1. 在缓存中维护计数
2. 根据请求 IP 进行计数
3. 记录请求的时间，定时任务清除过期计数

缓存数据结构："onlineVisitorCount": [{
      "ip": "",
      "recentTime": long
   }, ....]

Original issue reported on code.google.com by dl88250 on 16 May 2012 at 2:18

GoogleCodeExporter commented 9 years ago 
为了降低实现复杂度，使用内存 Map。

数据结构：<ip, recentTime>

某 IP 5 分钟内如果没有请求，则认为过期。

Original comment by dl88250 on 16 May 2012 at 3:14

GoogleCodeExporter commented 9 years ago 
This issue was closed by revision r4877.

Original comment by dl88250 on 16 May 2012 at 3:32

GoogleCodeExporter commented 9 years ago

Original comment by dl88250 on 16 May 2012 at 9:59