public class SessionWindow extends Object
session windowto track the behavior of the users in an online shop. It handles two kinds of events:
userIdand infers the duration of a single user session from the spread between adjacent events by the same user. Any period longer than the session timeout without further events from the same user ends the session window and allows its results to be emitted. The aggregated results of a session consist of two items: the total number of product listing views and the set of purchased items.
|Constructor and Description|
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