Stratara.Projections 3.1.3

.NET 10.0 This package targets .NET 10.0. The package is compatible with this framework or higher. 
dotnet add package Stratara.Projections --version 3.1.3
                    


                    

                
NuGet\Install-Package Stratara.Projections -Version 3.1.3
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="3.1.3" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
<PackageVersion Include="Stratara.Projections" Version="3.1.3" />
                    


                            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 3.1.3
                    


                    

                
#r "nuget: Stratara.Projections, 3.1.3"
#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@3.1.3
#: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=3.1.3
                    


                            Install as a Cake Addin
                        

                    

                
#tool nuget:?package=Stratara.Projections&version=3.1.3
                    


                            Install as a Cake Tool

Stratara.Projections

License: FSL-1.1-MIT (Functional Source License — source-available; converts to MIT after 2 years). Not OSI-approved OSS.

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/ ProjectionManager (event-bundle → matching projection-handlers fan-out), ProjectionHandler<TEvent> base class, ProjectionMethodInvoker (reflection-cached method-pointer dispatch into consumer projections), checkpoint plumbing
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.AddProjectionsFromAssemblyContaining<MyAppProjectionMarker>();

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

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, AddEventProjectionWorkerServices, 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
3.1.3 109 6/10/2026
3.1.2 149 6/5/2026
3.1.1 215 6/1/2026
3.1.0 140 5/30/2026
3.0.23 129 5/28/2026

### Added

- **Mediator tenant-isolation behavior** (`Stratara.Mediator`) — `AddStrataraTenantIsolation()`
 registers a pipeline behavior that enforces tenant isolation at the mediator entrance, before the
 handler runs, for any request that opts in via the new `ITenantScopedRequest` marker
 (`Stratara.Abstractions.Multitenancy`). The behavior compares the request's `TenantId` (data owner)
 against the ambient session's data-owner tenant and rejects a mismatch with the new
 `TenantAccessDeniedException` (translated to HTTP 403 on ASP.NET hosts). `TenantIsolationMode.Default`
 enforces only the subject match (privileged cross-tenant operations pass when the endpoint promoted
 the session subject to the target); `TenantIsolationMode.Strict` additionally routes every
 cross-tenant operation through the new `ICrossTenantAuthorizer`, whose shipped default denies all
 cross-tenant access until a consumer registers its own authorizer. Complements the existing
 database-side `ApplyGlobalTenantQueryFilters` with a command-/query-entrance guard. New log-event
 IDs `114_101`/`114_102`/`114_003` in `Stratara.Diagnostics`.
- **`Stratara.Abstractions.Persistence.ConcurrencyConflictException`** — provider-agnostic
 wrapper for an optimistic-concurrency conflict detected during commit. Allows framework-level
 code in `Stratara.Projections` (and any consumer outside the `EntityFrameworkCore` package) to
 react to concurrency without taking an EF Core dependency. EF Core's `DbUpdateConcurrencyException`
 (and provider equivalents) flow through this type.

### Changed

- **`EfTransaction.SaveChangesAsync`** (in `Stratara.EventSourcing.EntityFrameworkCore`) now
 wraps `DbUpdateConcurrencyException` thrown by EF Core in the new
 `ConcurrencyConflictException`. PostgreSQL unique-violation paths remain on `DbUpdateException`
 (different semantics — duplicate-key on insert vs. stale-row on update/delete).
- **`EventSource.SaveChangesAsync`** (write-side append flow) extends its concurrency-handling
 catch to the new exception type so the existing append-conflict recovery path keeps working
 after the wrap. Behaviour for both EF concurrency conflicts and PostgreSQL unique violations
 is unchanged.

### Fixed

- **`TenantProjection` no longer aborts the event bundle on a parallel delete race.** The two
 delete handlers (`TenantDeleted`, `CustomerTenantsDeleted`) now swallow
 `ConcurrencyConflictException` silently — a missing row is the desired end-state of a delete.
 Before this fix, a consumer-side customer-delete cascade saga that emits both
 `CustomerTenantsDeleted` and a follow-up `TenantDeleted` for the same tenants would race the
 two parallel projection bundles on the same `TenantView` row; the loser threw
 `DbUpdateConcurrencyException` out of `SaveChangesAsync`, which propagated through
 `ProjectionWorker` and caused `RabbitMqBus` to roll back the entire bundle — including
 sibling projections that had already committed. Update handlers (rename / activate /
 deactivate / locale / customer-assigned) keep their current behaviour: a concurrency failure
 there is a real race that propagates.