This repository is used as the example for the following articles:
- Distributed Transactions in Microservices with Kafka Streams and Spring Boot - how to implement distributed transaction based on the SAGA pattern with Spring Boot and Kafka Streams
There are three microservices:
order-service
- it sends Order
events to the Kafka topic and orchestrates the process of a distributed transaction
payment-service
- it performs local transaction on the customer account basing on the Order
price
stock-service
- it performs local transaction on the store basing on number of products in the Order
Here's the diagram with our architecture:
(1) order-service
send a new Order
-> status == NEW
(2) payment-service
and stock-service
receive Order
and handle it by performing a local transaction on the data
(3) payment-service
and stock-service
send a reponse Order
-> status == ACCEPT
or status == REJECT
(4) order-service
process incoming stream of orders from payment-service
and stock-service
, join them by Order
id and sends Order with a new status -> status == CONFIRMATION
or status == ROLLBACK
or status == REJECTED
(5) payment-service
and stock-service
receive Order
with a final status and "commit" or "rollback" a local transaction make before