Take your Azure Functions to the next level with Durable Functions - WAZUG
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The document discusses Durable Functions, a feature in Azure for managing workflows with functions that support orchestration and activity functions. It covers topics such as function chaining, fan-out/fan-in patterns, and best practices for unit testing. The author emphasizes the importance of keeping orchestrations small and deploying related changes together.
![Marc Duiker
Durable Functions
New Trigger Bindings
[OrchestrationClient] DurableOrchestrationClient(Base)
Function Role: Orchestration Starter](https://image.slidesharecdn.com/wazug-takingyourazurefunctionstothenextlevelwithdurablefunctions-181102083735/85/Take-your-Azure-Functions-to-the-next-level-with-Durable-Functions-WAZUG-20-320.jpg)
![Marc Duiker
Durable Functions
New Trigger Bindings
[OrchestrationTrigger] DurableOrchestrationContext(Base)
Function Role: Orchestration Function](https://image.slidesharecdn.com/wazug-takingyourazurefunctionstothenextlevelwithdurablefunctions-181102083735/85/Take-your-Azure-Functions-to-the-next-level-with-Durable-Functions-WAZUG-22-320.jpg)
![Marc Duiker
Durable Functions
New Trigger Bindings
[ActivityTrigger] DurableActivityContext
Function Role: Activity Function](https://image.slidesharecdn.com/wazug-takingyourazurefunctionstothenextlevelwithdurablefunctions-181102083735/85/Take-your-Azure-Functions-to-the-next-level-with-Durable-Functions-WAZUG-24-320.jpg)
![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 ).](https://image.slidesharecdn.com/wazug-takingyourazurefunctionstothenextlevelwithdurablefunctions-181102083735/85/Take-your-Azure-Functions-to-the-next-level-with-Durable-Functions-WAZUG-39-320.jpg)
Take your Azure Functions to the next level with Durable Functions - WAZUG
- 2. Marc Duiker Lead Azure Consultant @ Xpirit
- 7. Marc Duiker Durable Functions Multiple Functions & Control Flow
- 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
- 22. Marc Duiker Durable Functions New Trigger Bindings [OrchestrationTrigger] DurableOrchestrationContext(Base) Function Role: Orchestration Function
- 24. Marc Duiker Durable Functions New Trigger Bindings [ActivityTrigger] DurableActivityContext Function Role: Activity Function
- 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}
- 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
- 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
- 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 ).
- 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 [email protected] blog.marcduiker.nl @marcduiker