Question

I m working on a project which uses Facebook Graph Api to download information about users of our application and their Facebook friends. There is a need to update this data, but as I understand Real-Time Update is not an option. For example I would like to have update of profile feed of friends of our app user, and I don t see a way to do this with Real-Time Update.
Could someone give me some advice on this update mechanism? I need to update app users, their friend connections and profile feeds of users and their friends. I understand I ll have to poll Facebook servers to retrieve this data. What I m trying to find out is some good practices when doing these things. Update frequency? Way to recognize that data has changed? If anyone has experience with this kind of things every advice would mean a lot.

感谢。

Answer 1

您可以使用AAP图式电话的电离层参数。这里有一些假装,帮助你沿途。

var usersLastPostDate = GetLastPostDateFromDataStore(userId);
if(usersLastPostDate not populated) {
   streamItems = GraphApiGet(userId, "me/feed")
   lastStreamItemDate = GetNewestStreamItemDate(streamItems)
   StoreLastPostDateIntoDataStore(userId, lastStreamItemDate )
}
else {
   streamItems = GraphApiGet(userId, "me/feed?since=" + usersLastPostDate )
}

Answer 2

贵方使用案例并不大有助益(因为你想要获得经常变化的数据),但值得指出的是,图表AAP现在支持ETags——:https://developers.facebook.com/blog/post/627/。

ETags will tell you if the data has changed since the last time you requested it. This won t stop you from hitting Facebooks API throttling limits, but is a quick and easy way to tell if the data has changed since you last asked for it.

There is no one answer to your question, as it depends on what your application is doing. How often do you need to get the updated information? If your data is stale for 5 minutes, is that really a problem? Can you grab the data from Facebook lazily, when some user action requires that you have it?

If you do need to do a lot of polling try and use non-blocking IO, especially if you re expecting to have a lot of open HTTP requests to Facebook whilst you re polling. Build a reliable queueing mechanism and HTTP poker to ensure requests are being made as expected. Without any idea of what technology stack you re using it s hard to be more specific than that.

HTH

Answer 3

与此相关的内容是:。开放图表说明系统?

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