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Sagas in practice

By Yvonne Ceelie

June 18, 2021

5 min

This blog is a how-to implement a Saga with Axon and Spring Boot. Saga’s are a powerful concept but, you need to think about other options before implementing a Saga. You’ll have to keep in mind that...

Revisiting Axon Server in containers

By Bert Laverman

May 20, 2021

13 min

In my previous Blog on running a containerized Axon Server, I spent just a little bit of text on the challenges of using a single StatefulSet scaled to the number of nodes we want in the cluster....

Distilling the CQRS/ES capability

By Vijay Nair

April 20, 2021

3 min

CQRS/event sourcing are patterns, and to be more specific they are Application Design patterns, and their implementation spans across 3 main Architectural areas (*).

Dispelling the eventual consistency FUD, using event sourcing

By Vijay Nair

March 24, 2021

3 min

So your organization is toying with the idea of using Event Sourcing. The benefits look promising, but you can’t seem to shake off the nagging doubt of that one aspect of adoption - Eventual...

Protect sensitive data in an event-sourced application

By Yvonne Ceelie

February 24, 2021

7 min

In message-driven systems, messages flow in many directions. This behavior helps to decouple applications to make these systems better scalable. When it comes to sensitive data, we need to know who...

Event store migration and conversion

By Bert Laverman

December 21, 2020

10 min

There are several situations where you might want to copy or move the contents of your Event Store, not just to build a view model but to either move events to a new system or perform large-scale...

Axon and Akka - How do they compare?

By Vijay Nair

December 15, 2020

5 min

The Command Query Responsibility Separation(CQRS) and Event Sourcing (ES) patterns advocate the building of applications by treating it as a System of Events plus State rather than just as a System...

From model to code - zoom out

By Ivan Dugalic

December 14, 2020

4 min

In the previous blog post, Ivan focused on translating the "music lesson booking system" event model to the source code using Axon Framework, a programming model, and Axon Server as an event store...

Split & merge fundamentals

By Sara Pellegrini

November 26, 2020

5 min

Nowadays, systems must be designed to handle loads that change quickly and dynamically. In these situations, it is expected that our applications adapt accordingly. For example, Axon applications...

From Model to Code - Translating the (Event) Model into Code

By Ivan Dugalic

November 24, 2020

4 min

In the previous blog post, we (well, mostly Sara Torrey) have discussed Event modeling and how it can be used as a tool to create a blueprint for your solution.

Set Based Consistency Validation

By Yvonne Ceelie

November 11, 2020

6 min

Requests like “How do I ensure the email address in a User aggregate is unique?” or “How do I ensure usernames are only used once on command handling?” reach us quite often. We can rephrase them: How...

From Model to Code: Event Modeling & Axon Framework

By Sara Torrey

October 27, 2020

5 min

How do I design an application? What’s the process like? Where do I even begin?! Well, the ‘old me’ would design an application "on the fly," AKA, create a repository on GitHub, open it on IntelliJ,...

Axon and reactive systems

By Milen Dyankov

October 19, 2020

2 min

There is no need to introduce Axon Framework (and furthermore Axon Server) to the Java developers passionate about DDD, CQRS and/or Event Sourcing. In that space, there are not many tools out there...

High Availability with Axon Server and Axon Framework

By Bert Laverman

September 25, 2020

12 min

Key takeaways High Availability concerns the “art” of making a system deal with local failures in a way that enables it to limit the impact of the losses and prevent businesses and users from being...

Running Axon Server in a Virtual Machine

By Bert Laverman

June 22, 2020

21 min

Managed or DIY, AxonServer runs fine in the cloud, private or public So far, we’ve looked at Axon Server running locally to get a feel for its behavior and the typical customization points, and in...

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