Kursinnehåll

Introduction to Redis

1. Redis Fundamentals

What is Redis?Uses of Redis Installing Redis on Windows Installing Redis on MacOS Connecting to and Starting Redis

2. The Essential Redis Commands

SET Command GET Command EXISTS Command Challenge: Basic Commands INCR and DECR Commands Challenge: INCR and DECR Data Deletion

3. Data Types in Redis

String List Challenge: Task Management System Set Challenge: Managing User Interests Sorted Set Hash Table Challenge: Managing User Profiles

4. Advanced Features and Security

Managing Key Expiration Transactions PubSub Security RDB Persistence AOF Persistence

5. Caching with Redis and Spring Boot

Introduction to Caching Integration with Spring Boot Annotations for Working with Cache Practical Use of Hashes

Challenge: Managing User Interests

Imagine you are developing a feature for an application that tracks user interests. Information about each user is stored in Redis as a set. Each user has a unique collection of interests.

Add the interests for each user to their respective sets:
- user:1:interests: "music", "movies", "sports";
- user:2:interests: "sports", "travel", "reading";
- user:3:interests: "reading", "music", "cooking".
Check if User 1 is interested in "travel" and if User 2 is interested in "sports";
Identify the common interests of User 1 and User 2;
Find the interests of User 1 that are not shared by User 2;
Create a list of all unique interests shared by User 1, User 2, and User 3;
User 3 has stopped being interested in "music." Remove this interest from their set;
Display the list of interests for each user after performing these operations.

1. Add interests for each user to their respective sets:

SADD user:1:interests "music" "movies" "sports"
SADD user:2:interests "sports" "travel" "reading"
SADD user:3:interests "reading" "music" "cooking"

2. Verify if a specific interest exists in a user's set:

SISMEMBER user:1:interests "travel"    # result: 0 (User 1 is not interested)
SISMEMBER user:2:interests "sports"   # result: 1 (User 2 is interested)

3. Retrieve shared interests between two users:

SINTER user:1:interests user:2:interests   # result: ["sports"]

4. Get interests of one user that are not shared by another:

SDIFF user:1:interests user:2:interests   # result: ["music", "movies"]

5. Create a full list of unique interests from all users:

SUNION user:1:interests user:2:interests user:3:interests   # result: ["music", "movies", "sports", "travel", "reading", "cooking"]

6. Delete an interest from a user's set:

SREM user:3:interests "music"

7. Retrieve the updated sets of interests for each user:

SMEMBERS user:1:interests   # result: ["music", "movies", "sports"]
SMEMBERS user:2:interests   # result: ["sports", "travel", "reading"]
SMEMBERS user:3:interests   # result: ["reading", "cooking"]

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