Google App引擎上的UTC时间？ [英] UTC Time on Google App engine?

问题描述

如果我调用System.currentTimeMillis（）并存储该信息，那么当我的servlet在谷歌应用程序引擎中被击中时，什么是最好的方法？它可靠吗？

我不需要几毫秒的精度。

我只想在实体上存储日期它到达。

谢谢

解决方案

不，它不可靠。

在Dan Sanderson的编程Google App Engine一书中，他说：

值得注意的是，App Engine不保证所有Web服务器的系统
时钟都是同步的。 < ...>服务器时钟
与现实世界应用程序的时间数据源
不够一致，但对于此示例而言，它足够好。

http://books.google.com/books?id=6cL_kCZ4NJ4C&lpg = PA25& dq = clocks％20synchronized％20google％20app％20engine& pg = PA25＃v = onepage& q = clocks％20synchronized％20google％20app％20engine& f = false

What's the best way to work out the time when my servlet in google app engine is hit ?

if I call System.currentTimeMillis() and store that info will it be reliable ?

I don't need milliseconds precision.

I just want to store an entity with the date on when it arrives.

Thanks

解决方案

No, it won't be reliable.

In Dan Sanderson's book, "Programming Google App Engine" he says:

It's worth noting that App Engine makes no guarantees that the system clocks of all of its web servers are synchronized. <...> The server clock is not consistent enough as a source of time data for a real-world application, but it's good enough for this example.

http://books.google.com/books?id=6cL_kCZ4NJ4C&lpg=PA25&dq=clocks%20synchronized%20google%20app%20engine&pg=PA25#v=onepage&q=clocks%20synchronized%20google%20app%20engine&f=false

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