How durable functions work with .Net core & stateful serverless? If you’re looking to use durable functions, then hire ASP.Net Core Development team to create a project.

1. Guidelines to understand durable functions
with .Net Core, C# and Stateful Serverless

2. What are Durable Functions?
Durable Functions are an extension of Azure functions that allows
writing stateful functions in a serverless compute environment.
Create a reliable stateful workflow by enabling durable functions
using Azure Functions. Create a workflow with serverless functions,
managing errors, and running activities in a parallel way. The
functions allow managing state, checkpoints, and restarts for you.
Using this, you can have long-running functions and have stated that
remember your workflow.
What is the supported language for Durable function?
● JavaScript: It support version 2.x of Azure functions. It needs
1.7.0 for Durable function extension

3. ● C#: It comes with both precompiled class libraries and C# script
● Python: It requires the 1.8.5 version for durable functions
extension
● F#: It has precompiled class libraries and supports F# only if it
supports 1.x of Azure function.
Let’s take an example to understand better,
You have to manage a model which divides into different checkpoints.
Each point is closer to one step as you move. Let’s say there’s a game
where you want to load a bunch of various resources when everything is
loaded and ready. It will look like a workflow that enables you to specify
something along with the flow. We can observe different architect
patterns with different flows, isn’t it?

4. If you think this must be expensive, then you’re wrong. The model of
payment will work very closely with Azure function. You can pay for
the function if only you use it. So sounds impressive, right? Let’s
begin with the article as to how the durable functions work and its
necessary explanation.
There are a few concepts that we need to consider before dealing
with durable functions. Let’s take a run over those.
● Orchestrator Function: We define the workflow and set up with
what happened in it. What activities we need to carry out and
what’s done in it.

5. ● Activity Function: To work with Orchestrator function, activity
function is a basic unit to consider. The activity functions can
have as many activities it needs to add. You can give
descriptive names as per your choice and can represent the
flow your way.
● Client Functions: If you want to trigger functions, then client
functions are the new instance of an Orchestrator. These
functions are an entry point from which an instance is created
and works on Durable Orchestrator functions.

6. If this still confused you, let get into another form for better
understanding…
Taking another example, say as order processing where order
process with the following tasks:
● Check the inventory
● Charge the Customer
● Creating a Shipment

8. Check the above image to see how the client functions and how the
order created. Typically, it’s an HTTP endpoint where we hit from an
application. The second thing we can do is start the function of an
instance of orchestration by using instance id (a unique reference to
specific flow). Later the next thing we carry out is by checking the
inventory, charging the customer, and next creating a shipment.
How durable functions work with .Net core and stateful
serverless?
To move on with technical functions, the first thing that comes is
with Orchestration which usually is asynchronous, so we don’t have
an idea when does it finish. So, to overcome this issue, we have to
pay the running cost for its durable functions and save the state.
Here when the orchestration functions work hard, the orchestrator
wakes up and re-executes the entire function from start to local
state rebuild up.

9. Don’t worry about re-running during replay as the code will call its
function and consult the execution history of current orchestration. If
the function has already executed, it replays that function, and the
code continues to run. If this sounds better, then continue until the
function code is finished and schedule new async work.
Few guidelines to understand how to learn the functions
The best way to learn is to build something simple. By using the VS
code, we can install and make the process easy to go.
How to create a project?
Open the command palette and type COMMAND + SHIFT + P

10. Create a new project by choosing a language. If we select C# while
creating a new project, then the list of choices are as follows:
● DurableFunctionsOrchestration
● HttpTrigger
● BlobTrigger
● IoTHubTrigger
● QueueTrigger
● ServiceBusQueueTrigger
● ServiceBusTopicTrigger
● TimerTrigger

11. Choose Durable Functions Orchestration. Next choose the storage
account by selecting the Subscription, storage account, and Resource
group. Also, you need to save the state of function somewhere for
later recovery.
Note: The below codes taken techcommunity site
Check how your project will look alike:
Here in the program, there is a method named as
FunctionName(“orchestration”) and parameter context as
IDurableOrchestrationContext. The context calls callActivitivitySync()
and names as Orchestration_Hello to pass the string.

12. Wrap Up:
If you’re looking to use durable functions, then you can hire ASP.Net
Core Development team to create a project. There is a lot more to
learn about the durable functions, and we have covered most of
them over here.
They are moving on with an announcement done by Microsoft that
has bought significant technological trends where Pro ASP.Net Core
MVC 2 is one of the tools that has evaluated to improve the
productivity and development process. The technologies will be
accessible to developers and can use in their current work. These Pro
ASP.Net Core MVC 2 tools will work as low barriers to entry-level,
and so you can consider it in your future projects. I hope this post
was informative and easy to understand.

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