CQRS

Our implementation of query and command responsability segregation (CQRS).

Getting Started

Install nuget package to your awesome project.

Full Version	NuGet	NuGet Install
PoweredSoft.CQRS.Abstractions		PM> Install-Package PoweredSoft.CQRS.Abstractions
PoweredSoft.CQRS		PM> Install-Package PoweredSoft.CQRS
PoweredSoft.CQRS.FluentValidation		PM> Install-Package PoweredSoft.CQRS.FluentValidation
PoweredSoft.CQRS.AspNetCore.Abstractions		PM> Install-Package PoweredSoft.CQRS.AspNetCore.Abstractions
PoweredSoft.CQRS.AspNetCore		PM> Install-Package PoweredSoft.CQRS.AspNetCore
PoweredSoft.CQRS.GraphQL.HotChocolate		PM> Install-Package PoweredSoft.CQRS.GraphQL.HotChocolate

Sample of startup code for aspnetcore MVC

public void ConfigureServices(IServiceCollection services)
{
    // make sure to add your queries and commands before the .AddPoweredSoftQueries and .AddPoweredSoftCommands
    AddQueries(services);
    AddCommands(services);

    // adds the non related to aspnet core features.
    services.AddPoweredSoftCQRS();
    
    services
        .AddControllers()
        .AddPoweredSoftQueries() // adds queries to aspnetcore mvc.(you can make it configurable to load balance only commands on a instance)
        .AddPoweredSoftCommands() // adds commands to aspnetcore mvc. (you can make it configurable to load balance only commands on a instance)
        .AddFluentValidation();

    // enabling gql.
    services
        .AddGraphQLServer()
        .AddProjections()
        .AddQueryType(d => d.Name("Query"))
        .AddPoweredSoftQueries()
        .AddPoweredSoftDynamicQueries()
        .AddMutationType(d => d.Name("Mutation"))
        .AddPoweredSoftMutations();

    services.AddSwaggerGen();
}

Example how to add your queries and commands.

private void AddCommands(IServiceCollection services)
{
    services.AddCommand<CreatePersonCommand, CreatePersonCommandHandler>();
    services.AddTransient<IValidator<CreatePersonCommand>, CreatePersonCommandValidator>();

    services.AddCommand<EchoCommand, string, EchoCommandHandler>();
    services.AddTransient<IValidator<EchoCommand>, EchoCommandValidator>();
}

private void AddQueries(IServiceCollection services)
{
    services.AddQuery<PersonQuery, IQueryable<Person>, PersonQueryHandler>();
}

Fluent Validation

We use fluent validation in all of our projects, but we don't want it to be enforced.

If you install. PoweredSoft.CQRS.FluentValidation you can use this way of registrating your commands.

public void ConfigureServices(IServiceCollection services) 
{
    // without Package.
    services.AddCommand<EchoCommand, string, EchoCommandHandler>();
    services.AddTransient<IValidator<EchoCommand>, EchoCommandValidator>();
}

public void ConfigureServices(IServiceCollection services) 
{
    // with PoweredSoft.CQRS.FluentValidation package.
    services.AddCommandWithValidator<EchoCommand, string, EchoCommandHandler, EchoCommandValidator>();
}