Take your Azure Functions to the next level with Durable Functions @ WAZUG 2018

These are the slides for the Azure Durable Functions presentation I gave at the Azure User Group Netherlands (https://www.wazug.nl/) hosted by Xpirit.

Source code: https://github.com/marcduiker/demos-azure-durable-functions

Transcript

2. Marc Duiker Lead Azure Consultant @ Xpirit
3. Marc Duiker Durable Functions
4. Marc Duiker Durable Functions
5. Marc Duiker Durable Functions
6. Marc Duiker Durable Functions
7. Marc Duiker Durable Functions Multiple Functions & Control Flow
8. Marc Duiker Durable Functions
9. Marc Duiker Durable Functions
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14. Marc Duiker Durable Functions
15. Marc Duiker Durable Functions Durable Functions is based on
16. Marc Duiker Durable Functions Function Roles
17. Marc Duiker Durable Functions Invocations, Checkpoints & Replay
18. Marc Duiker Durable Functions Storage Types used by Durable Functions
19. Marc Duiker Durable Functions State is Persisted in Table Storage
20. Marc Duiker Durable Functions New Trigger Bindings [OrchestrationClient] DurableOrchestrationClient(Base) Function Role: Orchestration Starter
21. Marc Duiker Durable Functions DurableOrchestrationClient
22. Marc Duiker Durable Functions New Trigger Bindings [OrchestrationTrigger] DurableOrchestrationContext(Base) Function Role: Orchestration Function
23. Marc Duiker Durable Functions DurableOrchestrationContext
24. Marc Duiker Durable Functions New Trigger Bindings [ActivityTrigger] DurableActivityContext Function Role: Activity Function
25. Marc Duiker Durable Functions DurableActivityContext
26. Marc Duiker Durable Functions
27. Marc Duiker Durable Functions • Visual Studio 2017 15.7+ • Azure Workload - Extension: Azure Functions & Web Jobs Tools - Azure Storage Emulator - Microsoft.Azure.Webjobs.Extensions.DurableTask Local development with VS2017
28. Marc Duiker Durable Functions Hello {name} Demo! HttpStart HelloName {name} HelloNameActivity {name}
29. Marc Duiker Durable Functions
30. Marc Duiker Durable Functions Function chaining
31. Marc Duiker Durable Functions Demo: Function Chaining Find a Star Wars character and their home planet. https://swapi.co/
32. Marc Duiker Durable Functions Demo: Function Chaining HttpStart GetCharacterInfo SearchCharacter GetPlanet
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34. Marc Duiker Durable Functions Fan-out/fan-in FA1 returns a collection of items FA2 is called for each of the items from FA1
35. Marc Duiker Durable Functions Demo: Fan-out/Fan-in Find a Star Wars planet and their residents. https://swapi.co/
36. Marc Duiker Durable Functions Demo: Fan-out/Fan-in HttpStart GetPlanetResidents SearchPlanet GetCharacter
37. Marc Duiker Durable Functions
38. Marc Duiker Durable Functions Unit Testing Demo Testing the GetPlanetResidents orchestration using: • xUnit • Moq • AutoFixture
39. Marc Duiker Durable Functions Unit Testing • Use DurableOrchestrationContextBase in the orchestration. • Use serializable types with [ActivityTrigger] for the activity input (because DurableActivityContext can’t be instantiated/mocked due to internal constructor  ).
40. Marc Duiker Durable Functions
41. Marc Duiker Durable Functions • In and output of functions should be serializable. • Orchestration Functions should be deterministic: - DateTime.Now, use CurrentUtcDateTime - Guid.NewGuid() - Random generated data Closing remarks I
42. Marc Duiker Durable Functions • Orchestration Functions can only call Activity Functions in the same Function App. • Keep your orchestrations small. • What changes together should be deployed together. Closing remarks II
43. Marc Duiker Durable Functions GitHub: demos-azure-durable-functions mduiker@xpirit.com blog.marcduiker.nl @marcduiker