اشتراک‌ها
NET 5.0 Preview 8. منتشر شد

Today, we are releasing .NET 5.0 Preview 8. The .NET 5.0 release is now “feature complete”, meaning that very nearly all features are in their final form (with the exception of bug fixes still to come). Preview 8 is, appropriately, the last preview. We plan on releasing two go-live release candidates before the final .NET 5.0 release in November. This post describes a selection of features across the .NET 5.0 release. 

NET 5.0 Preview 8. منتشر شد
مطالب
خلاصه اشتراک‌های روز دو شنبه 1390/06/28

اشتراک‌ها
مدیریت مباحث همزمانی مرتبط با یک Rich Domain Model با استفاده از EFCore و الگوی Aggregate

In summary, the most important issues here are:

  • The Aggregate’s main task is to protect invariants (business rules, the boundary of immediate consistency)
  • In a multi-threaded environment, when multiple threads are running simultaneously on the same Aggregate, a business rule may be broken
  • A way to solve concurrency conflicts is to use Pessimistic or Optimistic concurrency techniques
  • Pessimistic Concurrency involves the use of a database transaction and a locking mechanism. In this way, requests are processed one after the other, so basically concurrency is lost and it can lead to deadlocks.
  • Optimistic Concurrency technique is based on versioning database records and checking whether the previously loaded version has not been changed by another thread.
  • Entity Framework Core supports Optimistic Concurrency. Pessimistic Concurrency is not supported
  • The Aggregate must always be treated and versioned as a single unit
  • Domain events are an indicator, that state was changed so Aggregate version should be changed as well 
public class AggregateRootBase : Entity, IAggregateRoot
{
    private int _versionId;

    public void IncreaseVersion()
    {
        _versionId++;
    }
}
internal sealed class OrderEntityTypeConfiguration : IEntityTypeConfiguration<Order>
{
    public void Configure(EntityTypeBuilder<Order> builder)
    {
        builder.Property("_versionId").HasColumnName("VersionId").IsConcurrencyToken();
 
        //...
    }
}
var order = await _ordersContext.Orders.FindAsync(orderId);
order.AddOrderLine(request.ProductCode); 
var domainEvents = DomainEventsHelper.GetAllDomainEvents(order);
if (domainEvents.Any())
{
    order.IncreaseVersion();
}
await _ordersContext.SaveChangesAsync();


مدیریت مباحث همزمانی مرتبط با یک Rich Domain Model با استفاده از EFCore و الگوی Aggregate
اشتراک‌ها
Visual Studio برای Mac

At Connect(); in November, Microsoft is launching a preview of Visual Studio for Mac

Visual Studio برای Mac
اشتراک‌ها
معرفی SQL Server بر روی Linux

 Today I’m excited to announce our plans to bring SQL Server to Linux as well. This will enable SQL Server to deliver a consistent data platform across Windows Server and Linux, as well as on-premises and cloud. 

معرفی SQL Server بر روی Linux
اشتراک‌ها
به کار بردن متدهای GET و POST چندگانه در ASP.NET Core Web API

In ASP.NET Core MVC and Web API are parts of the same unified framework. That is why an MVC controller and a Web API controller both inherit from Controller base class. Usually a Web API controller has maximum of five actions - Get(), Get(id), Post(), Put(), and Delete(). However, if required you can have additional actions in the Web API controller. This article shows how.

Let's say you have a Web API controller named CustomerController with the following skeleton code. 

به کار بردن متدهای GET و POST چندگانه در ASP.NET Core Web API
اشتراک‌ها
لیست جلسات کنفرانس Focus on Windows

.NET Conf: Focus on Windows is a free, one-day livestream event that features speakers from the community and Microsoft teams working on Windows desktop apps and making them fantastic on the latest .NET 5. Learn why and how to upgrade WPF and Windows Forms apps to .NET 5, see Visual Studio tooling improvements, learn how to leverage cloud services from your client apps, and a whole lot more. You'll... 

لیست جلسات کنفرانس Focus on Windows
اشتراک‌ها
مقایسه‌ی Blazor و Vue

If you're comfortable with JavaScript and the ecosystem, Vue is a solid framework which can easily scale up or down as your application requires.

On the other hand, if you already know and enjoy using C#, and have generally found JavaScript (the language and ecosystem) difficult to learn and live with, Blazor WASM is potentially a game changer. 

مقایسه‌ی Blazor و Vue