Azure Durable Functions

This is part of a full day Serverless training I hosted for Microsoft Turkey in Istanbul talking about Azure Durable Functions.

Transcript

1. Azure Durable Functions
   Daron Yöndem
   http://daron.me
   @daronyondem
   

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2. Durable!
   • Stateful functions
   • Managed state, checkpoints, and restarts when needed.
   • Define stateful workflows in orchestrator functions.
   .
   

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3. Workflows you said?
   • Define workflows in code. No JSON schemas or designers are
   needed.
   • They can call other functions synchronously and asynchronously.
   Output from called functions can be saved to local variables.
   • They automatically checkpoint their progress whenever the
   function awaits. Local state is never lost if the process recycles.
   

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4. Problem 1 : Function Chaining
   • No visualization to show relationship between functions and queues.
   • Middle queues are an implementation detail – conceptual overhead.
   • Error handling adds a lot more complexity.
   

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5. Function chaining
   DEMO
   

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6. Problem 2 : Fan-out/Fan-in
   • Fanning-out is easy, but fanning-in is more complicated.
   • Functions offers no help with this scenario today
   • All the same problems of the previous pattern
   

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7. Fan-Out
   DEMO
   

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8. Problem 3 : Eternal Processes
   • Long running processes
   • Built-in state management
   • orchestrationClient or built-in webhooks can be used.
   

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9. Problem 4 : Stateful Singletons
   • Actor like scenarios.
   • Long-running (possibly endless), stateful, reliable, single-
   threaded, location-transparent, and globally addressable.
   

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10. Stateful Singletons
    DEMO
    

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11. Problem 5 : Human Interaction
    • Durable timers to wait for external events.
    • orchestrationClient binding can be used to use built-in
    bindings.
    

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12. Durable Timers
    DEMO
    

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13. Links worth sharing
    Durable Task Framework
    • https://goo.gl/q4yjUc
    Durable Functions Nuget Package
    • https://goo.gl/p1ma8T
    

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14. Thanks
    http://daron.me | @daronyondem
    Download slides here;
    http://daron.me/decks
    

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