TechDays 2017 - Scalable Enterprise Applications with CQRS and Service Fabric

In this session we will show how we use CQRS and event sourcing to deploy our ERP solution on Service Fabric. We will talk about the pitfalls and the lessons learned. But we will also talk about how we keep this maintainable and testable by applying the ports and adapters approach from hexagonal architecture.

Transcript

1. michiel.overeem@afas.nl @michielovereem
2. 400+ employees (4 locations) 10.500 customers (companies) AFAS Software
3. HRM, CRM, finance, order management, project management, workflow, ... AFAS Profit
4. Filmpje mark (eerste plaat van het filmpje hier) 4752 cores, 70 TB RAM, 380 TB SSD storage 18.000 concurrent RDP users 450.000 unique users a month 5.600.000 API calls a day AFAS Online (89% customers)
6. Client Command system Query system Eventing system
7. Client Command system Query system Eventing system “PlaceOrderCommand”: { “OrderId”: “0b81b458-7671-4e9b-844b-9934255f5406”, “CustomerName”: “Linus Torvalds”, “OrderLines”: [ … ] }
8. Client Command system Query system Eventing system The command system validates the command, using its own datamodel.
9. Client Command system Query system Eventing system “OrderPlacedEvent”: { “OrderId”: “0b81b458-7671-4e9b-844b-9934255f5406”, “CustomerName”: “Linus Torvalds”, “OrderLines”: [ … ] }
10. Client Command system Query system Eventing system Broadcasts the events to the query system.
11. Client Command system Query system Eventing system Projection of data optimized for quering.
12. Client Command system Query system Eventing system “GetPlacedOrdersQuery”: { “CustomerName”: “Linus Torvalds” }
13. Client Command system Query system Eventing system And responds to queries send by the client.
14. Client Command system Query system Eventing system Use the events published to built up the state in the Command system.
15. Client Command system Query system Eventing system Use the events published to built up the state in the Command system.
16. Client Command system Query system Eventing system
20. Next Generation ERP
21. Client Command system Query system Eventing system
22. Client Command system Query system Eventing system
24. Client Command system Query system Eventing system “PlaceOrderCommand”: { “OrderId”: “0b81b458-7671-4e9b-844b-9934255f5406”, “CustomerName”: “Linus Torvalds”, “OrderLines”: [ … ] }
25. Client Command system Query system Eventing system “OrderPlacedEvent”: { “OrderId”: “0b81b458-7671-4e9b-844b-9934255f5406”, “CustomerName”: “Linus Torvalds”, “OrderLines”: [ … ] }
26. Client Query system Eventing system Load balancer
34. Client Query system Eventing system Load balancer “PlaceOrderCommand”: { “OrderId”: “0b81b458-7671-4e9b-844b-9934255f5406”, “CustomerName”: “Linus Torvalds”, “OrderLines”: [ … ] }
37. Client Command system Query system Eventing system
38. Client Command system Query system Eventing system “OrderPlacedEvent”: { “OrderId”: “0b81b458-7671-4e9b-844b-9934255f5406”, “CustomerName”: “Linus Torvalds”, “OrderLines”: [ … ] }
39. Client Command system Query system Eventing system
40. Client Command system Eventing system Load balancer
47. Client Command system Eventing system Load balancer
50. Client Command system Eventing system Load balancer
54. are made, the system
55. Client Load balancer
56. Client Load balancer
58. Client Load Balancer
59. Client Load Balancer
60. Client Load Balancer
65. Client Load Balancer
66. Client Load Balancer
67. Client Load Balancer
68. Client Load Balancer
69. Client Load Balancer
70. Client Load Balancer
71. Client Load Balancer
72. Client Load Balancer
73. michiel.overeem@afas.nl @michielovereem https://dev.afas.nl