实现像facebook一样的activity broadcast | 程序员达达



实现像facebook一样的activity broadcast | 程序员达达

如果实现像facebook一样的activity broadcast.
一个朋友f1更新一条信息后,他的所有朋友都要看到这条信息。

条件:
1. 朋友数量极大。
2. 有的朋友在线,有的不在线,不在线的登陆后要能看到。
3. 如果储存空间有限,如何处理。


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