Event Sourcing

Event Sourcing is a pattern for data storage, where instead of storing the current state of any entity, all past changes to that state are stored. With Axon Framework, you can implement Event Sourcing with minimal boilerplate code, giving you the benefits of Event Sourcing, without the hassle.

Upgrading to Axon Framework 4.7

By Steven van Beelen

    5 min

|

    Jan 26, 2023

Different than usual, upgrading to Axon Framework 4.7.x may just impact your application.
For that, we want to extend our apologies, as this differs from our desired approach towards minor releases.
This blog describes several upgrade scenarios, like what you need to do when you want to move to Jakarta or stay on Javax.
Each scenario provides a list of actions to upgrade to 4.7 to guide you.

Optimizing Event Processor Performance

By Mitchell Herrijgers

    15 min

|

    Jan 11, 2023

Ever wondered how to run your event processors with ultimate performance? This blog will dive into how you can tune your event processors in the best ways possible. 

Demystifying repositories

By Milen Dyankov

    6 min

|

    Jan 10, 2023

Repositories are essential components in Axon Framework. However, they mostly remain behind the scenes, and developers don't need to interact with them directly. Usually, the framework can configure, instantiate and use the correct repository based on how the developer has constructed the domain components. That convenience sometimes leads to misunderstandings. Those are caused by the many meanings of the term "repository" and the assumptions developers make when they hear or read it.

How dumb do you want your pipes?

By Gerard Klijs

    9 min

|

    Dec 09, 2022

A comparison of Apache Kafka and Axon Server with respect to how they work as message pipe. Will go through the format used and how sending messages work. As well as how messages are routed and how the solutions scale.

Set Based Consistency Validation Revisited

By Yvonne Ceelie

    3 min

|

    Oct 18, 2022

Because set-based consistency validation is a hot topic, we discuss it a lot within AxonIQ. In one of these discussions, my colleague Frédéric Gendebien proposed applying the actor model to solve this problem. Here is how it helps validate the uniqueness of a specific value against a set. 

Support for the `jakarta` namespace in Axon Framework 4.6

By Milen Dyankov

    6 min

|

    Oct 07, 2022

A significant change in the Java Enterprise space was made a few years back. The javax package was replaced with the jakarta one. As some Axon features use the JPA and JTA specifications, we needed to addopt the change. Here is how we did it in Axon Framework 4.6

Axon Framework 4.6.0: Fault-tolerant event processors

By Mitchell Herrijgers

    5 min

|

    Sep 27, 2022

Axon Framework 4.6.0 introduces the Dead Letter Queue, which will prevent your event processors from getting stuck on faulty events. Read this blog to get to know everything about this new feature. 

Axon Framework 4.6.0: Streaming queries

By Gerard Klijs

    4 min

|

    Sep 16, 2022

With Axon Framework 4.6.0 it's now possible to stream a query's results. This blog explains why you should want it and how to use it!

Axon Framework 4.6.0: Replay context propagation

By Mitchell Herrijgers

    10 min

|

    Sep 16, 2022

With Axon Framework 4.6.0 it's now possible to use a reset context in your event handlers during a replay. This blog will revisit how replays work, and you will learn about this new feature.

Be up to date with releases and don't miss important announcements

By Milen Dyankov

    5 min

|

    Jun 07, 2022

Even if you are a frequent Discuss visitor, you may not know about some of its practical use cases. Did you know you can use the platform to track product releases and configure it to notify you when new versions are published?  

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