Imagine a health-keeping system to provide activity suggestions for users, supporting the following features:

• Monitoring users' GPS locations, receiving them through HTTP post requests;
• Upon receiving GPS messages, fetch the weather condition forecast of the user's current location, from a third-party REST API;
• Upon receiving GPS messages, fetch the user's physical monitoring data, which is obtained by a third-party wearable device and dumped into some AWS S3 bucket.

This project implements such a system using Spring for Apache Kafka and Redis.

• Define models for messages and implement serialization
• Implement interaction with Redis
  • Set up connection. All configuration is done by Spring Boot.
  • Data structure modeling and specific behavior
• Implement interaction with DynamoDB
• Implement authentication and authorization