Stratara.Projections 4.4.10

Prefix Reserved
.NET 10.0 This package targets .NET 10.0. The package is compatible with this framework or higher.
There is a newer version of this package available.
See the version list below for details. 
dotnet add package Stratara.Projections --version 4.4.10
                    


                    

                
NuGet\Install-Package Stratara.Projections -Version 4.4.10
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="4.4.10" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
<PackageVersion Include="Stratara.Projections" Version="4.4.10" />
                    


                            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 4.4.10
                    


                    

                
#r "nuget: Stratara.Projections, 4.4.10"
#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@4.4.10
#: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=4.4.10
                    


                            Install as a Cake Addin
                        

                    

                
#tool nuget:?package=Stratara.Projections&version=4.4.10
                    


                            Install as a Cake Tool

Stratara.Projections

Derived. The behaviour described here is specified under openspec/specs/. Those specifications are the source; this page explains and illustrates them.

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
Abstractions/ IProjection and its refinements: IRebuildableProjection (can be rebuilt alone on the Orleans execution model) and IForgetsDeletedTenants (a fact recorded for a tenant after its deletion is passed over instead of failing the projection; the record is kept by IForgottenTenantStore, which the read store provides), and IReadModelPreservation (lets a failed replay restore the read models it emptied; the PostgreSQL implementation comes with AddReadModelRestore<TReadContext>())
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 (3)

Showing the top 3 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 — including a shared identity store with its migrations — shared conventions, value generators, and UnitOfWork primitives. Targets Npgsql; maps pgvector types for a model that uses them, and needs no database extension otherwise.
Stratara.EventSourcing.WorkerDefaults

Worker-host wiring composites for the Stratara event-sourced stack. IHostApplicationBuilder extensions (AddBackendServices, AddCommandWorkerServices, AddHeavyCommandWorkerServices, AddEventProjectionWorkerServices, AddEventStreamHashWorkerServices, AddSagaWorkerServices, AddOutboxWorkerServices, and AddCommandServices, AddEventProjectionServices and AddSagaServices without the bus-fed workers) bundle the per-concern DI calls so each worker host opts in with one line.
Stratara.Orleans

The Orleans execution model for the Stratara event-sourced stack — one activation per aggregate across the cluster, commands recorded before the call returns and resumed after a crash, projections and sagas that read the store in commit order from a checkpoint, singleton work, owner-checked durable timers and heavy work bounded across the cluster.

GitHub repositories

This package is not used by any popular GitHub repositories.

Version Downloads Last Updated
4.8.0 271 11/6/2026
4.7.1 199 11/5/2026
4.7.0 597 10/30/2026
4.6.1 167 10/29/2026
4.6.0 236 10/28/2026
4.5.0 323 10/28/2026
4.4.10 268 10/26/2026
4.4.9 174 10/26/2026
4.4.8 321 10/24/2026
4.4.7 176 10/23/2026
4.4.6 282 10/22/2026
4.4.5 367 10/14/2026
4.4.4 349 10/10/2026
4.4.3 183 10/10/2026
4.4.2 445 10/2/2026
4.4.1 433 9/29/2026
4.4.0 187 9/27/2026
4.3.1 192 9/25/2026
4.3.0 357 9/23/2026
4.2.0 231 9/18/2026
Loading failed

A release for hosts on the Orleans execution model. A durable timer now answers its tick while its handler runs, so a
long handler leaves no reminder error in the silo's log, and a timer that fails is logged by the framework with its
owner and purpose. A commit no longer constructs every registered projection to learn which store readers to wake. No
API change, no schema change and no migration.

### Changed

- **A commit no longer constructs every projection.** On the Orleans execution model, every command that committed
 facts constructed each registered projection, with its dependencies, only to learn the names of the store readers to
 wake. The names are now worked out once per silo, and the wait for a projection, the rebuild and the full replay's
 checkpoint reset use the same list. A rebuild of a name that is not registered is refused before any reader is
 paused, with the same message as before.

### Fixed

- **A durable timer answers its tick while its handler runs.** On the Orleans execution model, a durable timer's
 reminder call stayed open until its handler returned, so a handler longer than the runtime's response timeout made
 Orleans log `Could not deliver reminder tick` at Error for every tick it outlasted. The tick is now answered at once
 and the handler runs in a call that carries no response timeout. The timer still fires once per due time, a tick
 during its handler still does nothing, and a handler stopped with its silo still fires again on the next one.
- **A failing timer is logged.** A durable timer whose handler threw — or whose owner check or unregistration
 failed — was visible only as Orleans' reminder error line. It is now logged as `117_137` `TimerFiringFailed` (Error)
 with the owner, the purpose and the exception, and the timer fires again after its retry period as before.