Stratara.Projections 3.2.1

.NET 10.0 This package targets .NET 10.0. The package is compatible with this framework or higher. 
dotnet add package Stratara.Projections --version 3.2.1
                    


                    

                
NuGet\Install-Package Stratara.Projections -Version 3.2.1
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="Stratara.Projections" Version="3.2.1" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
<PackageVersion Include="Stratara.Projections" Version="3.2.1" />
                    


                            Directory.Packages.props
                        

                    

                
<PackageReference Include="Stratara.Projections" />
                    


                            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 Stratara.Projections --version 3.2.1
                    


                    

                
#r "nuget: Stratara.Projections, 3.2.1"
#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 Stratara.Projections@3.2.1
#: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=Stratara.Projections&version=3.2.1
                    


                            Install as a Cake Addin
                        

                    

                
#tool nuget:?package=Stratara.Projections&version=3.2.1
                    


                            Install as a Cake Tool

Stratara.Projections

License: MIT.

Projection runtime for the Stratara event-sourced stack. Discovers IProjection implementations in the consumer's application assemblies, dispatches event bundles to them, and applies the resulting change sets atomically via the read-model repository layer.

What's in the box

Folder Contents
Services/ The runtime, all internal: ProjectionManager (event-bundle → matching projection-handlers fan-out), ProjectionHandler (invokes a projection's matching methods), ProjectionMethodInvoker (reflection-cached method-pointer dispatch into consumer projections). You implement IProjection; these drive it
Multitenancy/ TenantProjection — the framework's own opinionated tenant aggregate projection. Skip the registration if your application has its own tenancy model
Diagnostics/Extensions/ Source-generated LoggerProjectionExtensions, LoggerChangeSetExtensions, LoggerUpdateExtensions — typed [LoggerMessage] surfaces under the Stratara.Projection.* / Stratara.ChangeSet.* / Stratara.Update.* event-ID bands

Quick start

// In your EventProjection worker:
builder.Services
    .AddProjectionWorker(builder.Configuration)                       // the runtime + hosted service
    .AddProjectionsFromAssemblyContaining<MyAppProjectionMarker>();   // your IProjection implementations

Then implement IProjection in your application assembly. The projection manager picks them up automatically.

Both calls are needed: AddProjectionsFromAssemblyContaining<T>() only registers your projections — AddProjectionWorker(IConfiguration) registers the manager, the invoker and the hosted service that consumes the event-bundle subscription. Without it nothing drives your projections. Most hosts get both from the AddEventProjectionWorkerServices() composite in Stratara.EventSourcing.WorkerDefaults.

No checkpoint store. Projections are driven push-wise off the event bus; the framework keeps no per-projection checkpoint, so there is no consumer-lag metric and no built-in resume-from-sequence. Replay is coordinated separately (see Stratara.Outbox.RabbitMQ's replay state).

Dependencies

  • Stratara.Contracts — for EventBundle + IEvent<T>.
  • Stratara.Domain — for the framework's Tenant aggregate (only consumed by TenantProjection).
  • Stratara.Shared — for change-tracking primitives, reflection cache, partitioning helpers, diagnostics base.
  • Microsoft.Extensions.Hosting.Abstractions + Microsoft.Extensions.Options.ConfigurationExtensions — for projection-worker checkpointing options.
  • JetBrains.Annotations — for static-analysis attributes on projection-handler conventions.
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 Stratara.Projections:

Package Downloads
Stratara.EventSourcing.EntityFrameworkCore

EF Core persistence for the Stratara event-sourced stack on PostgreSQL — write-store, read-store, ASP.NET Identity store, shared conventions, value generators, and UnitOfWork primitives. Targets Npgsql with pgvector.
Stratara.EventSourcing.WorkerDefaults

Worker-host wiring composites for the Stratara event-sourced stack. IHostApplicationBuilder extensions (AddBackendServices, AddCommandWorkerServices, AddHeavyCommandWorkerServices, AddEventProjectionWorkerServices, AddEventStreamHashWorkerServices, AddSagaWorkerServices, AddOutboxWorkerServices) bundle the per-concern DI calls so each worker host opts in with one line.

GitHub repositories

This package is not used by any popular GitHub repositories.

Version Downloads Last Updated
3.2.1 135 8/2/2026
3.2.0 138 7/18/2026
3.1.7 150 7/1/2026
3.1.6 570 6/22/2026
3.1.5 155 6/22/2026
3.1.4 172 6/15/2026
3.1.3 162 6/10/2026
3.1.2 167 6/5/2026
3.1.1 233 6/1/2026
3.1.0 152 5/30/2026
3.0.23 140 5/28/2026

### Fixed

- **Snapshot loads are now scoped to the aggregate type.** The snapshot read previously filtered
 only by stream id, so when two aggregate types shared a stream id, rehydrating one type could
 pick up the other type's (higher-versioned) snapshot and deserialize it into the requested type —
 silently returning an aggregate with default/empty fields. Snapshot reads now match the aggregate
 type (version-independently, so an assembly rev-bump does not invalidate existing snapshots), and
 snapshot writes are grouped per `(stream, aggregate type)` so a stream carrying more than one type
 snapshots each type independently. A snapshot of type X may now only ever rehydrate type X.

### Changed

- **`ISnapshotRepository` gained type-scoped read overloads.** `GetAsync(streamId,
 aggregateTypeName, toVersion, ct)` and `GetLatestVersionOrDefaultAsync(streamId,
 aggregateTypeName, ct)` are the correct lookups; the previous type-less overloads are now
 `[Obsolete]` because they can return a foreign aggregate type's snapshot on a shared stream.
 Custom `ISnapshotRepository` implementers should add the new overloads.