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A Love Story

A Love Story. Event Sourcing, CQRS & DDD. @ pjimmy. SOA Guy Alt.Net Melbourne Organiser NServiceBus Trainer thejimmyp.com. A Typical Setup. Throw a Datagrid at It. Throw a Datagrid at It. … & let users interact with the data. Make the Implicit, Explicit. with task based UI’s.

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A Love Story

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  1. A Love Story Event Sourcing, CQRS & DDD

  2. @pjimmy • SOA Guy • Alt.Net Melbourne Organiser • NServiceBus Trainer • thejimmyp.com

  3. A Typical Setup

  4. Throw a Datagrid at It

  5. Throw a Datagrid at It … & let users interact with the data

  6. Make the Implicit, Explicit with task based UI’s

  7. Make it Task Based

  8. which brings us back to A Typical Setup

  9. Where are the Events?

  10. Where are the Events?

  11. What… All the Time?

  12. Where it Provides Maximum Value • What… All the Time?

  13. Entities & Value Objects • make up our domain

  14. Aggregate Roots • we access our domain via

  15. Car Tire Position Engine

  16. Car Tire Position Engine

  17. Maintain Consistency • using aggregates

  18. Car Tire Position Engine

  19. Smaller Object Graphs • with aggregates

  20. CarWithTyres Add(Tire) Remove(Tire) CarWithEngine Tire Position Engine

  21. CarWithTyres Add(Tire) Remove(Tire) CarWithEngine Tire Position Engine

  22. Control Invariants • …whut?!?

  23. CarWithTyres Add(Tire) Remove(Tire) Tire Position

  24. CarWithTyres Rotate() Tire Position

  25. Audit Trail, Event Replay & Rebuild Application State • what can we do with an event log?

  26. Event Sourcing, CQRS &DDD • Could you tell them Apart?

  27. Questions?

  28. NServiceBus Training • Sydney Q3, contact me mail@thejimmyp.com

  29. With thanks to our sponsors

  30. Please complete your feedback forms, and return them to the registration desk for a chance to win a Nokia Lumia

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