Take your Azure Functions to the next level with Durable Functions - Serverless Computing London
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Slides of my presentation for Serverless Computing London at 13 Nov 2018. Source code for the demos is located in this repo: https://github.com/marcduiker/demos-azure-durable-functions
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Take your Azure Functions to the next level with Durable Functions - Serverless Computing London
- 2. Marc Duiker Lead Azure Consultant @ Xpirit
- 5. Marc Duiker Durable Functions CC BY-SA 3.0 Olga Tarkovskiy
- 8. Marc Duiker Durable Functions Multiple Functions & Control Flow
- 16. Marc Duiker Durable Functions Durable Functions is based on
- 17. Marc Duiker Durable Functions Function Roles
- 18. Marc Duiker Durable Functions Invocations, Checkpoints & Replay
- 19. Marc Duiker Durable Functions Storage Types used by Durable Functions
- 20. Marc Duiker Durable Functions State is Persisted in Table Storage
- 21. Marc Duiker Durable Functions New Trigger Bindings [OrchestrationClient] DurableOrchestrationClient(Base) Function Role: Orchestration Client (Starter Function)
- 23. Marc Duiker Durable Functions New Trigger Bindings [OrchestrationTrigger] DurableOrchestrationContext(Base) Function Role: Orchestration Function
- 25. Marc Duiker Durable Functions New Trigger Bindings [ActivityTrigger] DurableActivityContext Function Role: Activity Function
- 28. 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
- 29. Marc Duiker Durable Functions Hello {name} Demo! HttpStart HelloName {name} HelloNameActivity {name}
- 31. Marc Duiker Durable Functions Function chaining
- 32. Marc Duiker Durable Functions Demo: Function Chaining Find a Star Wars character and their home planet. https://swapi.co/
- 33. Marc Duiker Durable Functions Demo: Function Chaining HttpStart GetPlanetGetCharacterInfo SearchCharacter
- 35. Marc Duiker Durable Functions Fan-out/fan-in FA1 returns a collection of items FA2 is called for each of the items from FA1
- 36. Marc Duiker Durable Functions Demo: Fan-out/Fan-in Find a Star Wars planet and their residents. https://swapi.co/
- 37. Marc Duiker Durable Functions Demo: Fan-out/Fan-in HttpStart GetCharacterGetPlanetResidents SearchPlanet
- 39. Marc Duiker Durable Functions Unit Testing Demo Testing the GetPlanetResidents orchestration using: • xUnit • Moq • AutoFixture • FluentAssertions
- 40. Marc Duiker Durable Functions Unit Testing • Use the context base classes. • Use simple or complex (serializable) types with [ActivityTrigger] for the activity input. • Because DurableActivityContext can’t be instantiated/mocked due to internal constructor .
- 42. 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
- 43. 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
- 44. Marc Duiker Durable Functions GitHub: demos-azure-durable-functions mduiker@xpirit.com blog.marcduiker.nl @marcduiker