This project demonstrates five different HTTP communication methods between two Spring Boot microservices:
provider– exposes a simple REST API.consumer– consumes the provider's API using 5 different clients.
| Method | Description |
|---|---|
| RestTemplate | Traditional blocking HTTP client for REST calls. |
| RestClient | Newer, lightweight client introduced in Spring 6 (replacement for RestTemplate). |
| WebClient | Reactive, non-blocking HTTP client from Spring WebFlux. |
| Http Interface | Declarative interface-based client in Spring 6 using annotations. |
| OpenFeign | Declarative REST client from Spring Cloud OpenFeign. |
Each of these methods is implemented in the consumer application to call an API exposed by the provider.
- Java 17+
- Maven 3.8+
- Spring Boot 3.x
- Spring Framework 6.x
- Spring Cloud OpenFeign (for Feign client)