SamsadSajid / api-based-resiliency

How to run this project?

1. Clone the repo and cd api-based-resiliency/pay-bill-resilience-service
2. go mod download
3. docker-cmopose up
4. 127.0.0.1:8000/api/update-biller-health with POST req body { "biller_1": "UP", "biller_2": "DOWN", "biller_3": "UP" }
5. 127.0.0.1:8000/api/get-biller-status?code=biller_2, GET req

How to read the project

1. When you are hitting the POST request the matrix will be stored in the Redis with a TTL. It's described in the file, pay-bill-resilience-service.
2. When you are making a GET request to get the status of a specific code, it will collect the matrix from the Redis and send it back to you. It's described in the file, biller-status.go
3. If no entry is found in Redis, or if there is any error a default value UP will be sent.

System Design

Description

If you are in Layer 0 and wants to know the health status of Layer 2 and if there is no circuit breaker in Layer 1 then this approach is helpful.

Dependency

1. gin-gonic: Used in Transport layer
2. redi-go: redis client in go