C# – First steps with C# and .NET – part 063. – free-tutorials.org with free tutorials and source code

This new article presents a guide to running C# Azure functions in an isolated worker process.
They comes also with:
For complete examples, see the .NET 6 isolated sample project and the .NET Framework 4.8 isolated sample project
Isolated worker processes are designed to run untrusted code in a sandboxed environment, which makes them a good choice for running code that may be potentially dangerous or untrusted. They provide a secure and efficient way to run code in isolation from the main application process.
Isolated worker processes are a feature of .NET 5 and later versions, and they can be used in any environment that supports .NET 5 or later.
Let’s see one example, with a simple create console project:

dotnet new console
dotnet add package Microsoft.Extensions.Hosting

1 2	dotnet new console dotnet add package Microsoft.Extensions.Hosting

Change the Program.cs source code with this:

using Microsoft.Extensions.Hosting;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using System;
using System.Threading;
using System.Threading.Tasks;

class Program
{
    static void Main(string[] args)
    {
        var builder = new HostBuilder()
            .ConfigureAppConfiguration(config =>
            {
                config.AddCommandLine(args);
            })
            .ConfigureServices((hostContext, services) =>
            {
                services.AddHostedService();
            })
            .UseEnvironment(Environments.Production)
            .UseContentRoot(AppContext.BaseDirectory);

        var host = builder.Build();
        host.Run();
    }
}

class MyWorker : IHostedService
{
    public Task StartAsync(CancellationToken cancellationToken)
    {
        Console.WriteLine("Starting work...");
        // Start some work...
        return Task.CompletedTask;
    }

    public Task StopAsync(CancellationToken cancellationToken)
    {
        Console.WriteLine("Stopping work...");
        // Stop the work...
        return Task.CompletedTask;
    }
}

using Microsoft.Extensions.Hosting;

using Microsoft.Extensions.Configuration;

using Microsoft.Extensions.DependencyInjection;

using System;

using System.Threading;

using System.Threading.Tasks;

class Program

{

static void Main(string[] args)

{

var builder = new HostBuilder()

.ConfigureAppConfiguration(config =>

{

config.AddCommandLine(args);

})

.ConfigureServices((hostContext, services) =>

{

services.AddHostedService();

})

.UseEnvironment(Environments.Production)

.UseContentRoot(AppContext.BaseDirectory);

var host = builder.Build();

host.Run();

}

class MyWorker : IHostedService

{

public Task StartAsync(CancellationToken cancellationToken)

{

Console.WriteLine("Starting work...");

// Start some work...

return Task.CompletedTask;

}

public Task StopAsync(CancellationToken cancellationToken)

{

Console.WriteLine("Stopping work...");

// Stop the work...

return Task.CompletedTask;

}

Let’s build and run it and stop it with keys Ctrl + C:

dotnet build
MSBuild version 17.4.1+fedecea9d for .NET
  Determining projects to restore...
  All projects are up-to-date for restore.
...
Build succeeded.
    0 Warning(s)
    0 Error(s)

Time Elapsed 00:00:02.27
...
dotnet run
Starting work...
Stopping work...

dotnet build

MSBuild version 17.4.1+fedecea9d for .NET

Determining projects to restore...

All projects are up-to-date for restore.

...

Build succeeded.

0 Warning(s)

0 Error(s)

Time Elapsed 00:00:02.27

...

dotnet run

Starting work...

Stopping work...

Leave a Reply Cancel reply