Engineering the Future of Software
16–18 October 2017: Conference & Tutorials
18–19 October 2017: Training
London, UK

Complex event flows in distributed systems

Bernd Ruecker (Camunda), Martin Schimak (Plexiti)
15:5016:40 Monday, 16 October 2017
Distributed systems
Location: King's Suite - Balmoral
Secondary topics:  Best Practice
Average rating: ****.
(4.00, 14 ratings)

Prerequisite Knowledge

  • A basic understanding of distributed systems and microservice architecture

What you'll learn

  • Understand the problem of purely event-based communication (which most architectures favor nowadays, especially with microservices)
  • Learn the event command transformation pattern and some implementation approaches


With the rise of microservices and serverless clouds, the world is moving toward event-driven architectures composed of diverse, distributed systems and services. In this world, we have to manage business transactions and end-to-end processes that cross the boundary of individual services. Although event-driven choreography is fundamental to achieving nicely decoupled systems, complex event chains can cause headaches.

Bernd Rücker and Martin Schimak explain why transforming certain events into commands is beneficial and how to avoid losing sight of larger-scale flows. Bernd and Martin also demonstrate how to leverage existing technology to handle complex flows that require state handling, proper reactions on errors, timeouts, and compensating actions.

Photo of Bernd Ruecker

Bernd Ruecker


Bernd Rücker is a cofounder and developer advocate at Camunda, an open source software company reinventing workflow automation, where he focuses on new workflow automation paradigms that fit into modern architectures around distributed systems, microservices, domain-driven design, event-driven architecture, and reactive systems. Previously, Bernd helped automate highly scalable core workflows at global companies including T-Mobile, Lufthansa, and Zalando and contributed to various open source workflow engines. He coauthored Real-Life BPMN, a popular book about workflow modeling and automation, writes for various magazines, and regularly speaks at conferences.

Photo of Martin Schimak

Martin Schimak


Martin Schimak is a software developer at Plexiti. In his 15+-year career, Martin has helped implement complex business processes at a number of companies, including energy trading at E.ON, wind tunnel organization at BMW, and contract management for Telefónica. He has made manifold open source contributions on GitHub. Martin has a soft spot for readable APIs and testable specs, and as a curious domain “decoder," he is on a first-name basis with domain-driven design, BPMN, DMN, and CMMN. He is an editorial member of the well-read German software magazine OBJEKTspektrum and writes about topics such as Agile, microservices, and the particularly exciting field of long-running behavior. In his spare time, Martin organizes several meetups in his hometown of Vienna, Austria.