<ul data-eligibleForWebStory="true"><li>Event sourcing combined with Hexagonal architecture provides a debuggable, decoupled, and maintainable system.</li><li>The combination can lead to challenges such as event spaghetti and replay issues if not implemented correctly.</li><li>A guide on how to integrate Hexagonal architecture with Event Sourcing in Rails is provided.</li><li>Key wins include keeping business rules separate, defining events clearly, and allowing flexibility in rebuilding state.</li><li>Challenges like leaky event schemas, projection drift, and overloaded event handlers are addressed with solutions.</li><li>Testing strategies for commands, projections, and adapters in isolation are recommended.</li><li>The article suggests avoiding this combination for simple CRUD apps, lack of DevOps support, or tight deadlines.</li><li>A gradual adoption path starting with one event stream and domain extraction is proposed.</li><li>Starting small and gradually transitioning workflows to this architecture is advised to prevent overengineering.</li></ul>

Event Sourcing + Hexagonal Rails: A Survival Guide

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