Take your Azure Functions to the next level with Durable Functions @ SDN 2019

My slides for the presentation I gave during the Software Development Network event on April 12, 2019, in Zeist.

The source code is available at GitHub: https://github.com/marcduiker/demos-azure-durable-functions

Transcript

1. @marcduiker
2. Marc Duiker Lead Azure Consultant @ Xpirit
3. @marcduiker Durable Functions
4. @marcduiker Durable Functions
5. @marcduiker Durable Functions
6. @marcduiker Durable Functions
7. @marcduiker Durable Functions
8. @marcduiker Durable Functions Multiple Functions & Control Flow
9. @marcduiker Durable Functions
10. @marcduiker Durable Functions
11. @marcduiker Durable Functions
12. @marcduiker Durable Functions
13. @marcduiker Durable Functions
14. @marcduiker Durable Functions
15. @marcduiker Durable Functions
16. @marcduiker Durable Functions Durable Functions is based on
17. @marcduiker Durable Functions Function Roles
18. @marcduiker Durable Functions Invocations, Checkpoints & Replay
19. @marcduiker Durable Functions State is Persisted in Table Storage
20. @marcduiker Durable Functions New Trigger Bindings [OrchestrationClient] DurableOrchestrationClient(Base) Function Role: Starter Function
21. @marcduiker Durable Functions DurableOrchestrationClient
22. @marcduiker Durable Functions New Trigger Bindings [OrchestrationTrigger] DurableOrchestrationContext(Base) Function Role: Orchestrator Function
23. @marcduiker Durable Functions DurableOrchestrationContext
24. @marcduiker Durable Functions New Trigger Bindings [ActivityTrigger] DurableActivityContext Function Role: Activity Function
25. @marcduiker Durable Functions DurableActivityContext
26. @marcduiker Durable Functions
27. @marcduiker Durable Functions • Visual Studio 2017 15.7+ • Azure Workload • Extension: Azure Functions & Web Jobs Tools • Azure Storage Emulator • Nuget packages • Microsoft.NET.Sdk.Functions (1.0.26) • Microsoft.Azure.Webjobs.Extensions.DurableTask (1.8.0) Local development with VS2017/2019
28. @marcduiker Durable Functions Hello {name} Demo! HttpStart HelloName Ochestrator {name} HelloName Activity {name}
29. @marcduiker Durable Functions
30. @marcduiker Durable Functions Function chaining
31. @marcduiker Durable Functions Demo: Function Chaining Find a Star Wars character and return it’s: - Full name - Home planet - Species name - Species home planet. https://swapi.co/
32. @marcduiker Durable Functions Demo: Function Chaining HttpStart GetCharacterInfo Orchestrator GetSpecies Activity GetPlanet Activity SearchCharacter Activity
33. @marcduiker Durable Functions
34. @marcduiker Durable Functions Fan-out/fan-in FA1 returns a collection of items FA2 is called for each of the items from FA1
35. @marcduiker Durable Functions Demo: Fan-out/Fan-in Find a Star Wars planet and their residents. https://swapi.co/
36. @marcduiker Durable Functions Demo: Fan-out/Fan-in HttpStart GetPlanetResidents Orchestrator GetCharacter Activity SearchPlanet Activity
37. @marcduiker Durable Functions
38. @marcduiker Durable Functions Unit Testing Demo Testing the GetPlanetResidents orchestrator using: • xUnit • Moq • AutoFixture
39. @marcduiker Durable Functions
40. @marcduiker Durable Functions • In and output of functions should be serializable. • Orchestration Functions should be deterministic. Don’t use: - DateTime.Now, use CurrentUtcDateTime - Guid.NewGuid() - Random generated data Closing remarks I
41. @marcduiker Durable Functions • Orchestrator 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
42. @marcduiker Durable Functions GitHub: demos-azure-durable-functions mduiker@xpirit.com blog.marcduiker.nl @marcduiker