Trellis.Mediator 3.0.0-alpha.304

.NET 10.0 This package targets .NET 10.0. The package is compatible with this framework or higher.
This is a prerelease version of Trellis.Mediator. 
dotnet add package Trellis.Mediator --version 3.0.0-alpha.304
                    


                    

                
NuGet\Install-Package Trellis.Mediator -Version 3.0.0-alpha.304
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package. 
<PackageReference Include="Trellis.Mediator" Version="3.0.0-alpha.304" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
<PackageVersion Include="Trellis.Mediator" Version="3.0.0-alpha.304" />
                    


                            Directory.Packages.props
                        

                    

                
<PackageReference Include="Trellis.Mediator" />
                    


                            Project file
For projects that support Central Package Management (CPM), copy this XML node into the solution Directory.Packages.props file to version the package. 
paket add Trellis.Mediator --version 3.0.0-alpha.304
                    


                    

                
#r "nuget: Trellis.Mediator, 3.0.0-alpha.304"
#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package. 
#:package Trellis.Mediator@3.0.0-alpha.304
#:package directive can be used in C# file-based apps starting in .NET 10 preview 4. Copy this into a .cs file before any lines of code to reference the package. 
#addin nuget:?package=Trellis.Mediator&version=3.0.0-alpha.304&prerelease
                    


                            Install as a Cake Addin
                        

                    

                
#tool nuget:?package=Trellis.Mediator&version=3.0.0-alpha.304&prerelease
                    


                            Install as a Cake Tool

Trellis.Mediator

NuGet Package

Result-aware pipeline behaviors for Mediator that keep handlers focused on business work.

Installation

dotnet add package Trellis.Mediator

Quick Example

using Mediator;
using Trellis;
using Trellis.Mediator;

public sealed record GetOrderQuery(string Id) : IQuery<Result<string>>, IValidate
{
    public IResult Validate() =>
        string.IsNullOrWhiteSpace(Id)
            ? Result.Fail(new Error.InvalidInput(EquatableArray.Create(new FieldViolation(InputPointer.ForProperty(nameof(Id)), "validation.error") { Detail = "Order ID is required." })))
            : Result.Ok();
}

builder.Services.AddMediator(opts => opts.ServiceLifetime = ServiceLifetime.Scoped);
builder.Services.AddTrellisBehaviors();

Use ServiceLifetime.Scoped when calling AddMediator(...) in a host with a request scope. The Trellis behaviors are scoped (they depend on per-request services); the Mediator default of Singleton will fail ASP.NET's root-scope validation as soon as the first behavior tries to resolve a scoped dependency.

Key Features

  • Adds validation, authorization, tracing, logging, and exception behaviors that understand Result<T>.
  • Short-circuits failures before handlers do unnecessary work.
  • Unified ValidationBehavior composes IValidate + every IMessageValidator<TMessage> (e.g., the Trellis.FluentValidation adapter) and aggregates failures into one response.
  • Supports resource authorization with explicit or assembly-scanned registration.
  • Domain event dispatch: implement IDomainEventHandler<TEvent>, register with AddDomainEventDispatch(...), and the framework fires events from IAggregate.UncommittedEvents() after a successful command handler whose response is an IResult<TAggregate> (typically Result<TAggregate>) where TAggregate : IAggregate. Other response shapes (Result<Unit>, Result<TDto>, Result<(A,B)>) pass through untouched in v1. Non-cancellation handler exceptions are logged and swallowed so side effects never break the originating request; OperationCanceledException matching the request's token is the one exception that propagates so the caller can abort cleanly.

Documentation

Part of Trellis

This package is part of the Trellis framework.

Product Compatible and additional computed target framework versions.
.NET net10.0 is compatible.  net10.0-android was computed.  net10.0-browser was computed.  net10.0-ios was computed.  net10.0-maccatalyst was computed.  net10.0-macos was computed.  net10.0-tvos was computed.  net10.0-windows was computed. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.

NuGet packages (2)

Showing the top 2 NuGet packages that depend on Trellis.Mediator:

Package Downloads
Trellis.FluentValidation

Convert fluent validation errors to Trellis Validation errors.
Trellis.ServiceDefaults

Opinionated service composition defaults for Trellis web services. Provides a tiered builder that wires ASP integration, Mediator behaviors, FluentValidation, resource authorization, actor providers, and EF Core Unit of Work in canonical order.

GitHub repositories

This package is not used by any popular GitHub repositories.

Version Downloads Last Updated
3.0.0-alpha.304 62 5/29/2026
3.0.0-alpha.158 94 4/5/2026
3.0.0-alpha.157 68 4/4/2026
3.0.0-alpha.140 71 3/30/2026
3.0.0-alpha.137 79 3/27/2026
3.0.0-alpha.135 57 3/26/2026
3.0.0-alpha.127 58 3/23/2026
3.0.0-alpha.123 64 3/19/2026
3.0.0-alpha.118 70 3/14/2026
3.0.0-alpha.111 62 3/12/2026
3.0.0-alpha.104 78 3/9/2026
3.0.0-alpha.100 58 3/4/2026
3.0.0-alpha.99 61 3/4/2026
3.0.0-alpha.98 63 3/3/2026
3.0.0-alpha.95 61 3/2/2026
3.0.0-alpha.94 57 3/2/2026
3.0.0-alpha.93 65 3/1/2026
3.0.0-alpha.92 70 2/28/2026