Distributed Transactions in Microservices Using 2-Phase Commit (2PC)

The services in this project are designed with microservice architecture for performing distributed transaction using 2-Phase Commit (2PC).

Each microservice exposes REST API interfaces that can be accessed through OpenAPI endpoint (/swagger-ui.html)

Tech Stack

1. SpringBoot
2. Spring Data JPA
3. MySQL Database
4. RabbitMQ

Pre-Requisites

1. RabbitMQ
   • Start RabbitMQ in Docker with command docker run -d --hostname my-rabbit --name some-rabbit -p 8080:15672 rabbitmq:3-management Learn more
2. MySQL Database
   • Start MySQL in Docker with command docker run --name some-mysql -e MYSQL_ROOT_PASSWORD=my-secret-pw -d mysql:tag Learn more

Usage

1. Start discovery-server. Default port is 8761.
2. Start all microservices: transaction-server, account-service, order-service, product-service
3. Add some test data to account-service and product-service
4. Send order creation request to order-service for testing the flow.

Architecture

In this microservice-based architecture design, discovery-server plays an important role for registering and retrieving the service instances from a centralize location.

The transaction-server is responsible for maintaining transaction status for multiple services for a given transactionId.

There are three applications: order-service, account-service and product-service.

The application order-service is communicating with account-service and product-service. All these applications are using MySQL database as a backend store.

Distributed Transaction Flow