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One ongoing discussion among the DDD community is about clarity in how to approach long running processes.
First challenge: Implementation. There are known patterns like Saga or Process Manager, but how can these be implement properly? Having long running processes requires you to save state and to handle timeouts – but that’s just the beginning. Is a custom DSL the way to go? Should existing tools like state machines, orchestration frameworks or workflow engines be leveraged?
Second challenge: Methodology. How can end-to-end processes be implemented without violating DDD principles including the bounded context? How should responsibility be distributed? If long running processes turn out to be business processes spanning multiple days, weeks or months - how does this change the game?
In this talk Bernd will share with you a summary of his team's real-life experience at Camunda with these questions, discuss pros and cons of different approaches and provide guidance, backed by concrete code examples to illustrate alternatives.
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Long running processes in DDD
Throughout Bernd's 15+ years in software development, he has helped automating highly scalable core workflows at global companies including T-Mobile, Lufthansa and Zalando. Bernd has contributed to various open source workflow engines. He is co-founder and developer advocate of Camunda, an open source software company reinventing workflow automation. He co-authored "Real-Life BPMN," a popular book about workflow modeling and automation. He regularly speaks at conferences and write for various magazines. Bernd is currently focused on new workflow automation paradigms that fit into modern architectures around distributed systems, microservices, domain-driven design, event-driven architecture and reactive systems.