Distributed Transaction Management in Microservices — Part 2 — Saga Pattern

Hello everyone. This article is a continuation of the previous article

Distributed Transaction Management in Microservices — Part 1

In this article, we are going to see about the Saga pattern which is an asynchronous pattern that performs a sequence of transactions in each microservice and publishes messages or events to proceed to the next step. If any step fails in between, compensating steps will be executed by the Saga pattern to reverse the transaction

Image Source: https://docs.microsoft.com/en-us/azure/architecture/reference-architectures/saga/images/saga-overview.png

We can see from the above diagram that the Saga patterns perform a sequence of local transactions in each service. Each service updates its database and then publishes a message or event which will trigger the next local transaction.

Image Source: https://www.baeldung.com/wp-content/uploads/sites/4/2021/04/saga-pattern.png

So we have to write the logic to commit the transaction and also have a mechanism to reverse the flow when something goes wrong anywhere in the transaction. All the transactions and compensating transactions will…