https://github.com/sumedhahire/spring-boot-eureka-grpc-feign-simplified

Spring Boot tutorial: bidirectional microservices using Eureka, Feign, gRPC, and Hibernate.
https://github.com/sumedhahire/spring-boot-eureka-grpc-feign-simplified

eureka-client eureka-discovery-service eureka-server feign feign-client-example grpc hibernate-jpa intellij java lombak maven microservices-architecture pom spring-boot spring-mvc

Last synced: 10 months ago
JSON representation

Spring Boot tutorial: bidirectional microservices using Eureka, Feign, gRPC, and Hibernate.

• Host: GitHub
• URL: https://github.com/sumedhahire/spring-boot-eureka-grpc-feign-simplified
• Owner: sumedhahire
• License: mit
• Created: 2025-09-29T04:06:10.000Z (10 months ago)
• Default Branch: main
• Last Pushed: 2025-09-30T05:32:38.000Z (10 months ago)
• Last Synced: 2025-09-30T07:16:30.377Z (10 months ago)
• Topics: eureka-client, eureka-discovery-service, eureka-server, feign, feign-client-example, grpc, hibernate-jpa, intellij, java, lombak, maven, microservices-architecture, pom, spring-boot, spring-mvc
• Language: Java
• Homepage: https://www.sumedhahire.info
• Size: 25.4 KB
• Stars: 4
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

Awesome Lists containing this project

README

          

springboot-microservices-eureka-grpc-feign-tutorial




  

  

  

  

  

  



A compact hands-on tutorial (its simple rest assure). Two Spring Boot services register with Eureka and communicate using Feign (REST) and gRPC.


Table of contents



  
Overview

  
Prerequisites

  
Repo structure

  
Quickstart

  
Run manually

  
Test examples

  
Contributing

  
License





Overview



  Notes on modules:





  Notes on modules:





  


common-lib: Shared models used by both gRPC and Feign clients for type consistency.

  


order: Provides REST and gRPC endpoints; also consumes endpoints from product.

  


product: Provides REST and gRPC endpoints; also consumes endpoints from order.

  


eureka-server: Handles service registration and discovery, enabling both applications to find each other dynamically.





  This design allows bidirectional communication between order and product via Feign (REST) and gRPC, with all shared data models maintained in common-lib.



Prerequisites



  
Java 17+

  
Maven 3.8+

  
docker & docker-compose (optional)

  
grpcurl (optional)



Repo structure

microservices/

├── eureka-server/

├── order/       # feign client + grpc client

├── product/       # rest + grpc server

└── common-proto/    # hello.proto



Quickstart (one-command)

git clone https://github.com/sumedhahire/spring-boot-eureka-simplified

./mvnw -pl eureka-service,order,product clean package -DskipTests



Eureka UI: http://localhost:8761


Run manually



  
Start Eureka:

    
cd eureka-server

./mvnw spring-boot:run

  

  
Start service-b (provider):

    
cd ../product

./mvnw spring-boot:run

  

  
Start service-a (consumer):

    
cd ../order

./mvnw spring-boot:run

  



Test examples

Feign (REST)

curl http://localhost:8080/hello/feign

# {"message":"Hello from service-b (rest)"}


gRPC

grpcurl -plaintext -d '{"name":"sumedh"}' localhost:9090 hello.HelloService/SayHello

# {"message":"Hello sumedh from gRPC"}


Contributing

Use labels: good first issue, enhancement, bug. Keep PRs small and reference the step affected.


License

MIT. See LICENSE.


  Notes

  
GitHub strips <style> and many attributes. This HTML uses supported tags only so it renders inside README.md. For a full HTML/CSS page host it via GitHub Pages and put the file in /docs or use the gh-pages branch.