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@marcduiker

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Marc Duiker Lead Azure Consultant @ Xpirit

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@marcduiker Durable Functions

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@marcduiker Durable Functions

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@marcduiker Durable Functions

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@marcduiker Durable Functions

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@marcduiker Durable Functions

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@marcduiker Durable Functions Multiple Functions & Control Flow

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@marcduiker Durable Functions

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@marcduiker Durable Functions

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@marcduiker Durable Functions

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@marcduiker Durable Functions

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@marcduiker Durable Functions

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@marcduiker Durable Functions

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@marcduiker Durable Functions

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@marcduiker Durable Functions Durable Functions is based on

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@marcduiker Durable Functions Function Roles

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@marcduiker Durable Functions Invocations, Checkpoints & Replay

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@marcduiker Durable Functions State is Persisted in Table Storage

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@marcduiker Durable Functions New Trigger Bindings [OrchestrationClient] DurableOrchestrationClient(Base) Function Role: Starter Function

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@marcduiker Durable Functions DurableOrchestrationClient

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@marcduiker Durable Functions New Trigger Bindings [OrchestrationTrigger] DurableOrchestrationContext(Base) Function Role: Orchestrator Function

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@marcduiker Durable Functions DurableOrchestrationContext

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@marcduiker Durable Functions New Trigger Bindings [ActivityTrigger] DurableActivityContext Function Role: Activity Function

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@marcduiker Durable Functions DurableActivityContext

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@marcduiker Durable Functions

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@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

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@marcduiker Durable Functions Hello {name} Demo! HttpStart HelloName Ochestrator {name} HelloName Activity {name}

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@marcduiker Durable Functions

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@marcduiker Durable Functions Function chaining

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@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/

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@marcduiker Durable Functions Demo: Function Chaining HttpStart GetCharacterInfo Orchestrator GetSpecies Activity GetPlanet Activity SearchCharacter Activity

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@marcduiker Durable Functions

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@marcduiker Durable Functions Fan-out/fan-in FA1 returns a collection of items FA2 is called for each of the items from FA1

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@marcduiker Durable Functions Demo: Fan-out/Fan-in Find a Star Wars planet and their residents. https://swapi.co/

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@marcduiker Durable Functions Demo: Fan-out/Fan-in HttpStart GetPlanetResidents Orchestrator GetCharacter Activity SearchPlanet Activity

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@marcduiker Durable Functions

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@marcduiker Durable Functions Unit Testing Demo Testing the GetPlanetResidents orchestrator using: • xUnit • Moq • AutoFixture

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@marcduiker Durable Functions

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@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

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@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

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@marcduiker Durable Functions GitHub: demos-azure-durable-functions [email protected] blog.marcduiker.nl @marcduiker