HTTP Clients and Services Demo Suite

A multi-module Maven workspace showing several ways to call HTTP APIs with modern Spring on Java 25 and Spring Boot 4.1.0.

Modules at a glance

Module	Port	What it does
rest-service	8080	Employee REST API backed by Spring MVC, JPA, cache abstraction, and H2
soap-service	7070	Minimal Spring-WS SOAP service with employee operations: GetEmployeeById, CreateEmployee, and GetAllEmployees
rest-client	8081	Synchronous Spring RestClient façade plus a small Spring Cloud Config refresh demo
web-client	8082	Reactive WebClient client with SSL settings and Resilience4j circuit breaker + retry
graphql-service	9090	GraphQL server exposing movie and actor queries plus an add-movie mutation
graphql-client	9091	GraphQL consumer that wraps HttpGraphQlClient behind simple REST endpoints

Tech baseline

• Java 25
• Spring Boot 4.1.0
• Spring Cloud 2025.1.2
• Maven multi-module build
• Lombok 1.18.46

Project structure

http-clients/
├── graphql-client/
├── graphql-service/
├── rest-client/
├── rest-service/
├── soap-service/
└── web-client/

Build everything

Run from the repository root:

mvn test

To package all modules:

mvn clean package

Recommended local run order

1. Start rest-service
2. Start graphql-service
3. Start rest-client, web-client, and/or graphql-client

Run a single module

Each module includes its own Maven wrapper, so you can run them independently:

cd rest-service && ./mvnw spring-boot:run
cd graphql-service && ./mvnw spring-boot:run
cd rest-client && ./mvnw spring-boot:run
cd web-client && ./mvnw spring-boot:run
cd graphql-client && ./mvnw spring-boot:run

Where to look next

• rest-service/README.md
• rest-client/README.md
• web-client/README.md
• graphql-service/README.md
• graphql-client/ReadMe.md