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
   

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2. 400+ employees (4 locations)
   10.500 customers (companies)
   AFAS Software
   

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3. HRM, CRM, finance, order
   management, project
   management, workflow, ...
   AFAS Profit
   

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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)
   

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6. Client
   Command system
   Query system
   Eventing system
   

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7. Client
   Command system
   Query system
   Eventing system
   “PlaceOrderCommand”: {
   “OrderId”: “0b81b458-7671-4e9b-844b-9934255f5406”,
   “CustomerName”: “Linus Torvalds”,
   “OrderLines”: [ … ]
   }
   

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8. Client
   Command system
   Query system
   Eventing system
   The command system validates the
   command, using its own datamodel.
   

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9. Client
   Command system
   Query system
   Eventing system
   “OrderPlacedEvent”: {
   “OrderId”: “0b81b458-7671-4e9b-844b-9934255f5406”,
   “CustomerName”: “Linus Torvalds”,
   “OrderLines”: [ … ]
   }
   

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10. Client
    Command system
    Query system
    Eventing system
    Broadcasts the events to
    the query system.
    

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11. Client
    Command system
    Query system
    Eventing system
    Projection of data
    optimized for quering.
    

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12. Client
    Command system
    Query system
    Eventing system
    “GetPlacedOrdersQuery”: {
    “CustomerName”: “Linus Torvalds”
    }
    

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13. Client
    Command system
    Query system
    Eventing system
    And responds to queries
    send by the client.
    

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14. Client
    Command system
    Query system
    Eventing system
    Use the events published to built up the
    state in the Command system.
    

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15. Client
    Command system
    Query system
    Eventing system
    Use the events published to built up the
    state in the Command system.
    

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16. Client
    Command system
    Query system
    Eventing system
    

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20. Next Generation ERP
    

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21. Client
    Command system
    Query system
    Eventing system
    

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22. Client
    Command system
    Query system
    Eventing system
    

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24. Client
    Command system
    Query system
    Eventing system
    “PlaceOrderCommand”: {
    “OrderId”: “0b81b458-7671-4e9b-844b-9934255f5406”,
    “CustomerName”: “Linus Torvalds”,
    “OrderLines”: [ … ]
    }
    

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25. Client
    Command system
    Query system
    Eventing system
    “OrderPlacedEvent”: {
    “OrderId”: “0b81b458-7671-4e9b-844b-9934255f5406”,
    “CustomerName”: “Linus Torvalds”,
    “OrderLines”: [ … ]
    }
    

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26. Client
    Query system
    Eventing system
    Load balancer
    

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34. Client
    Query system
    Eventing system
    Load balancer
    “PlaceOrderCommand”: {
    “OrderId”: “0b81b458-7671-4e9b-844b-9934255f5406”,
    “CustomerName”: “Linus Torvalds”,
    “OrderLines”: [ … ]
    }
    

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37. Client
    Command system
    Query system
    Eventing system
    

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38. Client
    Command system
    Query system
    Eventing system
    “OrderPlacedEvent”: {
    “OrderId”: “0b81b458-7671-4e9b-844b-9934255f5406”,
    “CustomerName”: “Linus Torvalds”,
    “OrderLines”: [ … ]
    }
    

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39. Client
    Command system
    Query system
    Eventing system
    

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40. Client
    Command system
    Eventing system
    Load balancer
    

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47. Client
    Command system
    Eventing system
    Load balancer
    

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50. Client
    Command system
    Eventing system
    Load balancer
    

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54. are made, the system
    

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55. Client
    Load balancer
    

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56. Client
    Load balancer
    

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58. Client
    Load Balancer
    

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59. Client
    Load Balancer
    

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60. Client
    Load Balancer
    

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65. Client
    Load Balancer
    

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66. Client
    Load Balancer
    

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67. Client
    Load Balancer
    

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68. Client
    Load Balancer
    

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69. Client
    Load Balancer
    

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70. Client
    Load Balancer
    

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71. Client
    Load Balancer
    

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72. Client
    Load Balancer
    

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73. michiel.overeem@afas.nl
    @michielovereem
    https://dev.afas.nl
    

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