Reads click events from a stream, counts clicks per URL, and records user's last activity in their profiles.
An event represents a user's click on a URL.
The profile of a user.
Demonstrates the use of column-level conflict detection by the example of managing user profiles, where individual attributes such as name and email address can be updated without conflicting with updates to other attributes such as the last active time of the user.
A service for creating and modifying user profiles.
See the class UserProfiles for more details.
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