CQRS

Dosaic.Plugins.Handlers.Cqrs is a plugin that provides CQRS implementation for basic resource operations, automatically registering handlers and validators for CRUD operations.

Installation

To install the nuget package follow these steps:

dotnet add package Dosaic.Plugins.Handlers.Cqrs

Appsettings.yml

No specific configuration in appsettings.yml is required for this plugin.

Configuration in your plugin host

No specific configuration available.

Features

• Automatic registration of default CRUD handlers:

  • Create (ICreateHandler<>)

  • Update (IUpdateHandler<>)

  • Delete (IDeleteHandler<>)

  • Get (IGetHandler<>)

  • GetList (IGetListHandler<>)

• Auto-discovery and registration of custom handlers implementing IHandler

• Auto-discovery and registration of custom validators implementing IBaseValidator

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Example Usage

Example service using the create handler, all handlers are to be used in the same way

public class UserService
{
    private readonly ICreateHandler<UserResource> _createHandler;

    public UserService(ICreateHandler<UserResource> createHandler)
    {
        _createHandler = createHandler;
    }

    public async Task<UserResource> CreateUserAsync(string name, CancellationToken cancellationToken)
    {
        var newUser = new UserResource { Name = name };
        return await _createHandler.CreateAsync(newUser, cancellationToken);
    }
}

// Example validator
public class UserResourceValidator : ICreateValidator<UserResource>
{
    public void ValidateOnCreate(UserResource resource)
    {
        if (string.IsNullOrEmpty(resource.Name))
            throw new ValidationException("Name is required");
    }
}

// Example repository implementation or use a Dosaic.Plugins.Persistence plugin for a database of your choice
public class UserResourceRepository : IRepository<UserResource>
{
    public async Task<UserResource> AddAsync(UserResource entity, CancellationToken cancellationToken)
    {
        // Implementation details...
        return entity;
    }

    // Other repository methods...
}