Event Sourcing

1. Overview This article aims to provide readers with an in-depth understanding of Command Query Responsibility Segregation (CQRS) and Event Sourcing, along with a practical implementation using Spring Data (Apache Cassandra), Kafka and WebFlux. …

In the first part of this tutorial, we explained what events are and what they are used for. Today, we are going to build a very simple implementation of an event store. The event store should satisfy the following requirements: Events should be durable (i.e., committed so disk, not in…

This post is the first of a series about event sourcing and an exciting framework called EventSourcing.Backbone. In this post, we’ll explore the fundamentals of event sourcing and a Hello World sample of the framework. Understanding Event Sourcing Event sourcing is an architectural pattern that captures and persists state changes as a sequence…

Over the last few years, I have been the chief architect of the Jumla platform which connected thousands of suppliers and consumers in the food industry. One of the key aspects of the design of Jumla was the adoption of event sourcing as the cornerstone of the architecture. What is Event Sourcing? Event sourcing…

Confluent Cloud takes Apache Kafka to a whole new level. Confluent Kafka provides additional technologies that sit on top of Apache Kafka. Some of Confluent Kafka’s offerings are free under the Confluent Community License, and some are only available through Confluent’s enterprise license. In the following series, the focus is…

1. Publish-subscribe Pub/Sub (or Publish/Subscribe) is an architectural design pattern used in distributed systems for asynchronous communication between different components or services. The key to this is the fact that Pub/Sub enables the movement of messages between different components of the system without the components being aware of each other’s identity (they…

Best practices for implementing domain events in a microservices environment and tips for event-driven architecture, including event sourcing and event bus. — Some time ago, I wrote a blog post about domain event management and architecture for my teammates because I was a bit tired of answering the same questions over and over again (which happened in every company I worked for ;)). The time has come to share it with the…

Storing data in tables is the most common way of maintaining the record of data. There are other forms of storing data as well such as event sourcing which maintains a collection of user actions in the form of events there by we have more information available for us as…

Most systems that we work with on a general basis, require the latest state of the system and we use CRUD operations to keep the system at it’s latest state. …