From Legacy to Reactive: The First Mile

From Legacy to Reactive: The First Mile

The first few decisions an architect must make on a modernization project are critical, but while most learning materials concentrate on the end goal of a modern architecture, we’re going to focus on the first few steps. While not revolutionary, the most common question asked by architects and consultants in the modernization space is “where do we even begin?”

Many teams get stuck on how to properly kick off a project of this scope. We’ll discuss modernization from the very first few steps. Event storming will bring all key stakeholders together in a collaborative environment in order to define the business processes involved and how to translate them into event-driven systems. This will show us a path towards the scope of initial work, while also planting the seeds for cultural change within an organization by focusing on the most interesting events that already occur within your business.

Once we have define the scope of initial work, we’ll pick up speed by diving into the first key architectural decisions and how make those decisions guided by the first-principles of Domain-Driven Design. We’ll dive deep into the nitty gritty by turning our DDD models into user stories and then implementing a few of those stories. We must do this while balancing the complexities of enterprise integration. How do we integrate new microservices into an old, brittle legacy system? How do we handle new and old systems living alongside each other?

This talk is inspired by Kevin’s upcoming mini-book from O’Reilly, Migrating Java to the Cloud: Modernize Enterprise Systems Without Starting From Scratch. By the end of this session, it will be apparent why a forceful revolution doesn’t work at enterprise scale. Instead, we’ll make the case for a calm, methodical, and measurable evolution of enterprise systems.

“You say you got a real solution? Well, you know, we'd all love to see the plan.”


Kevin Webber

October 19, 2017