SDS.Outbox.NHibernate 1.2.0

.NET Standard 2.0 This package targets .NET Standard 2.0. The package is compatible with this framework or higher. .NET Framework 4.6.2 This package targets .NET Framework 4.6.2. The package is compatible with this framework or higher. 
dotnet add package SDS.Outbox.NHibernate --version 1.2.0
                    


                    

                
NuGet\Install-Package SDS.Outbox.NHibernate -Version 1.2.0
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="SDS.Outbox.NHibernate" Version="1.2.0" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
<PackageVersion Include="SDS.Outbox.NHibernate" Version="1.2.0" />
                    


                            Directory.Packages.props
                        

                    

                
<PackageReference Include="SDS.Outbox.NHibernate" />
                    


                            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 SDS.Outbox.NHibernate --version 1.2.0
                    


                    

                
#r "nuget: SDS.Outbox.NHibernate, 1.2.0"
#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 SDS.Outbox.NHibernate@1.2.0
#: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=SDS.Outbox.NHibernate&version=1.2.0
                    


                            Install as a Cake Addin
                        

                    

                
#tool nuget:?package=SDS.Outbox.NHibernate&version=1.2.0
                    


                            Install as a Cake Tool

Transactional Outbox for NHibernate Integration

This document summarizes the Transactional Outbox support added to MassTransit.NHibernateIntegration, based on the same overall approach used by MassTransit.EntityFrameworkCoreIntegration.

Goals

  • Support the Inbox/Outbox pattern for NHibernate-based consumer pipelines.
  • Ensure idempotent processing using MessageId + ConsumerId.
  • Store Send/Publish operations in the outbox within the same transaction as message consumption.
  • Periodically clean up delivered inbox records after the duplicate detection window expires.

Added Files

Outbox Configuration

  • Configuration/INHibernateOutboxConfigurator.cs
  • Configuration/INHibernateBusOutboxConfigurator.cs
  • Configuration/Configuration/NHibernateOutboxConfigurator.cs
  • Configuration/Configuration/NHibernateBusOutboxConfigurator.cs
  • Configuration/NHibernateOutboxConfigurationExtensions.cs

Outbox Runtime

  • NHibernateIntegration/Outbox/NHibernateOutboxOptions.cs
  • NHibernateIntegration/Outbox/NHibernateOutboxContextFactory.cs
  • NHibernateIntegration/Outbox/NHibernateOutboxConsumeContext.cs
  • NHibernateIntegration/Outbox/NHibernateScopedBusContext.cs
  • NHibernateIntegration/Outbox/NHibernateConsumeContextScopedBusContext.cs
  • NHibernateIntegration/Outbox/NHibernateScopedBusContextProvider.cs
  • NHibernateIntegration/Outbox/BusOutboxDeliveryService.cs
  • NHibernateIntegration/Outbox/InboxCleanupService.cs
  • NHibernateIntegration/Outbox/NHibernateOutboxExtensions.cs

Outbox State Model and Mappings

  • NHibernateIntegration/Outbox/InboxState.cs
  • NHibernateIntegration/Outbox/OutboxState.cs
  • NHibernateIntegration/Outbox/OutboxMessage.cs
  • NHibernateIntegration/Outbox/InboxStateMap.cs
  • NHibernateIntegration/Outbox/OutboxStateMap.cs
  • NHibernateIntegration/Outbox/OutboxMessageMap.cs
  • NHibernateIntegration/Outbox/NHibernateOutboxMappings.cs

New APIs

Register Outbox in DI

x.AddNHibernateOutbox(o =>
{
    o.IsolationLevel = System.Data.IsolationLevel.RepeatableRead;
    // o.DisableInboxCleanupService();
    o.UseBusOutbox();
});

Apply Transactional Outbox on a Receive Endpoint

e.UseNHibernateOutbox(context);

Legacy overload is also available:

e.UseNHibernateOutbox(provider);

Full Usage

1) Add Outbox Mappings to NHibernate Model

When creating ISessionFactory, include outbox mapping types:

var mappedTypes = new[]
{
    // ... your saga mappings
}.Concat(MassTransit.NHibernateIntegration.Outbox.NHibernateOutboxMappings.Mappings);

Or pass NHibernateOutboxMappings.Mappings directly to your session factory provider.

2) Register ISessionFactory in DI

Ensure ISessionFactory is registered in the container so the outbox context factory can be resolved.

3) Configure MassTransit

services.AddMassTransit(x =>
{
    x.AddNHibernateOutbox(o =>
    {
        o.IsolationLevel = System.Data.IsolationLevel.RepeatableRead;
        o.DuplicateDetectionWindow = TimeSpan.FromMinutes(30);
        o.QueryDelay = TimeSpan.FromSeconds(10);
        o.QueryMessageLimit = 100;
        o.QueryTimeout = TimeSpan.FromSeconds(30);
    });

    x.UsingRabbitMq((context, cfg) =>
    {
        cfg.ReceiveEndpoint("example-queue", e =>
        {
            e.UseNHibernateOutbox(context);
            e.ConfigureConsumers(context);
        });
    });
});

Important Notes

  • This implementation focuses on consumer transactional outbox (inbox + outbox in the consume pipeline).
  • It includes bus outbox support via UseBusOutbox(...), which intercepts IPublishEndpoint and ISendEndpointProvider and delivers persisted outbox messages using a hosted background service.
  • Duplicate detection locking uses pessimistic row locking (LockMode.Upgrade) on InboxState.
  • You should add appropriate indexes/constraints in your database schema for performance and duplicate prevention.

Verification

The changes were validated with successful builds of:

  • MassTransit.NHibernateIntegration.csproj
  • MassTransit.sln

Transactional Outbox for NHibernate Integration

Product Compatible and additional computed target framework versions.
.NET net5.0 was computed.  net5.0-windows was computed.  net6.0 was computed.  net6.0-android was computed.  net6.0-ios was computed.  net6.0-maccatalyst was computed.  net6.0-macos was computed.  net6.0-tvos was computed.  net6.0-windows was computed.  net7.0 was computed.  net7.0-android was computed.  net7.0-ios was computed.  net7.0-maccatalyst was computed.  net7.0-macos was computed.  net7.0-tvos was computed.  net7.0-windows was computed.  net8.0 was computed.  net8.0-android was computed.  net8.0-browser was computed.  net8.0-ios was computed.  net8.0-maccatalyst was computed.  net8.0-macos was computed.  net8.0-tvos was computed.  net8.0-windows was computed.  net9.0 was computed.  net9.0-android was computed.  net9.0-browser was computed.  net9.0-ios was computed.  net9.0-maccatalyst was computed.  net9.0-macos was computed.  net9.0-tvos was computed.  net9.0-windows was computed.  net10.0 was computed.  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. 
.NET Core netcoreapp2.0 was computed.  netcoreapp2.1 was computed.  netcoreapp2.2 was computed.  netcoreapp3.0 was computed.  netcoreapp3.1 was computed. 
.NET Standard netstandard2.0 is compatible.  netstandard2.1 was computed. 
.NET Framework net461 was computed.  net462 is compatible.  net463 was computed.  net47 was computed.  net471 was computed.  net472 was computed.  net48 was computed.  net481 was computed. 
MonoAndroid monoandroid was computed. 
MonoMac monomac was computed. 
MonoTouch monotouch was computed. 
Tizen tizen40 was computed.  tizen60 was computed. 
Xamarin.iOS xamarinios was computed. 
Xamarin.Mac xamarinmac was computed. 
Xamarin.TVOS xamarintvos was computed. 
Xamarin.WatchOS xamarinwatchos was computed. 
Compatible target framework(s)
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NuGet packages

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Version Downloads Last Updated
1.2.0 156 6/15/2026
1.1.2 122 5/22/2026
1.1.1 119 5/20/2026
1.1.0 122 5/19/2026
1.0.0 116 5/15/2026