Welcome! In this unit, we will explore how to use Redis streams for event logging. This is an important part of our Redis-based backend system project. By the end of this lesson, you will know how to log events and retrieve them using Redis streams. Remember, you've already learned how to manage user data and handle transactions. Now, we're adding another layer to our system by using streams.

In this unit, we will focus on the following tasks:

1. Adding entries to a stream: We will log user activities in a Redis stream.
2. Reading entries from a stream: You will see how to read the logged events from the stream.

To log user activities, we use the xadd command in Redis. In our Java implementation, this is handled by the addToStream method in the Main class. Here's how it works:

This method logs an event to a Redis stream with fields such as event, username, , and . Each event is auto-assigned a unique ID by Redis.