Durable functions are stateful functions and will make checkpoints and restart at a checkpoint if a process is recycled. Durable functions allow you to call other Azure Functions and obtain the returned data. This makes patters such as Function chaining and Fan-out/Fan-in much more easier. They also can provide you with an async status update of your running function from an HTTP endpoint. It's an exciting time to be a developer !!!

1. Introduction to Durable
Functions in Azure
David Opdendries
24.11.2018 SharePoint Saturday Oslo 2018

2. Thank you
Sponsors
24.11.2018 SharePoint Saturday Oslo 2018

3. David Opdendries
David@zalosolutions.com
@SharePointDavid

4.  Introduction
 Patterns
 Demo
 Additional Information and Final Thoughts

6. • ServerSide / Remove Event Recievers / Timer Jobs
• Provider Hosted Apps / Remove Event Recievers
• WebHooks / Flow / Azure Functions
• And now Durable Functions

7. • Are an extension of Azure Functions
• Stateful functions in a serverless environment
• Manages state, checkpoints, and restarts for you.
• C#, JavaScript, F#
• A workflow in the form of code

8. • Define workflows in your code
• call other functions synchronously and
asynchronously
• Manages state, checkpoints, and restarts for you.
• Takes the complexity away from complex processes

9. • Simple needs = Regular Azure Functions
• Complex needs = Durable Functions / Function
Orchestration

12. https://docs.microsoft.com/en-us/azure/azure-
functions/durable-functions-overview
Visual Studio 2017
• Create Azure Functions Project
• Add NuGet Package
Microsoft.Azure.WebJobs.Extensions.DurableTask

14. Wait for one function before calling another one.
Most Common Scenario for using Azure Functions

15. Run a batch of activities then wait until all are finished.

16. Monitor long running
operations and get
status updates.
Updates External
Activities
Terminate an
orchestration
Rollback (Preview)

17. Wait until conditions are
met in order to proceed
Set a time interval to
check
Eg. Wait for status
change on a list item in
SharePoint

19. Wait for an external interaction

20. Demo

22. • Sub-orchestrations
• Durable timers
• External events
• Error handling
• Cross-function app
communication
• Versioning
• Scaling
• Great support for
Application Insights

23. Questions

24. Thank you
Sponsors
24.11.2018 SharePoint Saturday Oslo 2018

25. Get stamps on
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amazing gifts
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from Valo with
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27. Get stamps on
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to win
amazing gifts
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28. 24.11.2018 SharePoint Saturday Oslo 2018

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