Devoxx UK 2023 - Developer Community Conference

Devoxx UK is a conference for developers who want to learn, be inspired, improve their skills, and have fun

Location transparency - Milen Dyankov

If it is the first time you've heard the term, then this talk is for you! If you are concerned about Coherence, Coupling, and Connascence metrics while building applications, this talk is definitely for you. If the amount of things that can break prevents you from splitting a monolith into distributed microservices, then applying location transparency may be both your kick-starter and your safety net.

This talk will examine a traditional application with its dependencies between methods, classes, packages, and modules. We'll talk about how those impact applications' ability to grow and be decomposed into independently deployable units. Then we'll see how and where to apply location transparency. Finally, we'll rise above the code to explore how Domain-Driven Design, CQRS, and Event Sourcing architectural concepts tackle complexity and why location transparency is key while doing so.

Dead-Letter Queues in Event-Driven systems- Steven van Beelen

Using a dead-letter queue is a very reasonable solution to deal with exceptional scenarios when dealing with message delivery. Although commonplace, have you ever thought about the requirements of a dead-letter queue in an event-driven system?

Simply dead-lettering a failure isn't sufficient. What about the following message that might expect the previous message to be handled? Or how do you decide when to reprocess entries within the queue? This quick talk aims to shed some light on these specifics and why it is more complex than you might think.