Building a Scalable Web API with CQRS Pattern using .NET Core 6 | Planner App | Web API | LSC

Hi Friends,

In this video, we will see how to develop DOTNET Core 6 WEB API using CQRS Pattern. The App in this demo is a Planner App.

A web API application developed using the CQRS pattern and .NET Core 6 provides a flexible and scalable architecture for building modern web applications. CQRS (Command Query Responsibility Segregation) is a pattern that separates the read and writes operations of an application, providing a clear separation of concerns and enabling more efficient scaling.

In a .NET Core 6 web API application developed with the CQRS pattern, the application is divided into two distinct areas: commands and queries. The command area is responsible for handling all write operations, such as creating, updating, or deleting data. The query area, on the other hand, is responsible for handling all read operations, such as retrieving data from a database.

One of the primary benefits of using the CQRS pattern in a .NET Core 6 web API application is that it enables developers to scale the application more efficiently. Because read and write operations are handled separately, it is possible to scale the application horizontally, adding additional read or write nodes as needed.

Additionally, the CQRS pattern provides a more natural mapping to domain concepts and simplifies the logic in the application by separating write and read operations. This enables developers to focus on the specific requirements of each operation type and provide a more robust and flexible architecture.

Overall, a .NET Core 6 web API application developed using the CQRS pattern provides a flexible and scalable architecture for building modern web applications. It separates the read and write operations, simplifies the logic, and enables efficient scaling.

Supporting Links for this video.

Please post your questions in the comment section and I will be happy to answer your questions.

Happy coding!

[anurag]

Hey Karthik,

Thanks a ton for uploading the video explaining the CQRS pattern! It’s really helpful.

I wanted to suggest that the controller action code in the video is a bit complicated. It might be more understandable for beginners if it's simplified a bit. Here’s an example of how we can create a controller action to make it clearer:

public class PlanScheduleController : ControllerBase
{
private readonly IPlanScheduleRepository _planScheduleRepository;
private readonly IGetTimeSlotDetailsCommand _command;
private readonly _planScedulesByPlanIdCommand;
private readonly

public PlanScheduleController(
IPlanScheduleRepository planScheduleRepository,
IGetTimeSlotDetailsCommand command,
planScedulesByPlanIdCommand,

{
_planScheduleRepository = planScheduleRepository;
_command = command;
_planScedulesByPlanIdCommand = planScedulesByPlanIdCommand;
=
}

[HttpGet("GetTimeSlots")]
[ProducesResponseType(typeof(List<TimeSlotDetails>), StatusCodes.Status200OK)]
public async Task<IActionResult> cancellationToken)
{
var result = await
return Ok(result);
}


[ProducesResponseType(typeof(UserPlanSchedules), StatusCodes.Status200OK)]
[ProducesResponseType(typeof(string),
public async Task<IActionResult> planid, CancellationToken cancellationToken)
{
var result = await _planScedulesByPlanIdCommand.ExecuteAsync(planid, cancellationToken);
return Ok(result);
}
}