Stratara.Contracts
4.0.3
Prefix Reserved
See the version list below for details.
dotnet add package Stratara.Contracts --version 4.0.3
NuGet\Install-Package Stratara.Contracts -Version 4.0.3
<PackageReference Include="Stratara.Contracts" Version="4.0.3" />
<PackageVersion Include="Stratara.Contracts" Version="4.0.3" />
<PackageReference Include="Stratara.Contracts" />
paket add Stratara.Contracts --version 4.0.3
#r "nuget: Stratara.Contracts, 4.0.3"
#:package Stratara.Contracts@4.0.3
#addin nuget:?package=Stratara.Contracts&version=4.0.3
#tool nuget:?package=Stratara.Contracts&version=4.0.3
Stratara.Contracts
Derived. The behaviour described here is specified under
openspec/specs/. Those specifications are the source; this page explains and illustrates them.
License: MIT.
Wire-level POCO contracts shared by every Stratara package. Pure data records — no runtime, no DI, no infrastructure deps. Safe to reference from any layer.
Contents
Messages/EventMessage,EventBundle,CommandEnvelope— the cross-process envelope shapes that messaging adapters (Stratara.Outbox.RabbitMQetc.) serialise on and off the bus.Requests/PagedRequest— shared pagination + sort record used by query handlers across the family.Session/SessionContext— public data shape for actor/subject identity, correlation, causation, and connection routing. TheISessionContextProviderservice abstraction lives inStratara.Abstractions; the ASP.NET Core middleware that populates it lives inStratara.Sessions.
Quick reference
// Build a CommandEnvelope outside the framework (rare, but supported)
var envelope = new CommandEnvelope(
Id: Guid.CreateVersion7(),
CommandJson: commandJson,
CommandTypeName: typeof(MyCommand).AssemblyQualifiedName!,
SessionContextJson: sessionContextJson);
Dependencies
None. Contracts is the lowest tier in the Stratara dependency graph.
| Product | Versions 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. |
-
net10.0
- No dependencies.
NuGet packages (9)
Showing the top 5 NuGet packages that depend on Stratara.Contracts:
| Package | Downloads |
|---|---|
|
Stratara.Abstractions
Contract interfaces and POCO records for the Stratara CQRS / Event Sourcing framework — Mediator, EventSourcing, Persistence, Outbox, Messaging, Session, Security, Authorization. Library-safe, no EF Core or message-bus runtime. |
|
|
Stratara.Sessions
ASP.NET Core middleware and provider for Stratara's Actor/Subject session model. Reads tenant and user from JWT claims (or X-Tenant-Id / X-Client-Id headers) and populates the ambient ISessionContextProvider for every request. |
|
|
Stratara.Shared
Umbrella package for the Stratara framework — source-generated logger extensions for command flows, domain-event helpers, merge primitives, and the Tier-A/B abstractions surface re-exported as one transitive bundle. |
|
|
Stratara.Projections
Projection runtime for the Stratara event-sourced stack — projection-handler discovery, change-set creation, update application, and projection manager. Sits between read-model repositories and the event-bundle dispatcher. |
|
|
Stratara.Outbox.RabbitMQ
Outbox-pattern command and event dispatch for the Stratara event-sourced stack — RabbitMQ IMessageBus implementation, retry worker, mediator command worker, and Redis-coordinated projection-replay state. Azure Service Bus support ships as the sibling Stratara.Outbox.AzureServiceBus package. |
GitHub repositories
This package is not used by any popular GitHub repositories.
| Version | Downloads | Last Updated |
|---|---|---|
| 4.4.0 | 39 | 9/27/2026 |
| 4.3.1 | 213 | 9/25/2026 |
| 4.3.0 | 531 | 9/23/2026 |
| 4.2.0 | 356 | 9/18/2026 |
| 4.1.1 | 361 | 9/16/2026 |
| 4.1.0 | 291 | 9/16/2026 |
| 4.0.4 | 1,143 | 9/14/2026 |
| 4.0.3 | 413 | 9/3/2026 |
| 4.0.2 | 816 | 9/3/2026 |
| 4.0.1 | 438 | 9/2/2026 |
| 4.0.0 | 870 | 8/31/2026 |
| 4.0.0-preview.1 | 163 | 8/31/2026 |
| 3.4.0 | 393 | 8/28/2026 |
| 3.3.0 | 550 | 8/25/2026 |
| 3.2.3 | 378 | 8/22/2026 |
| 3.2.2 | 928 | 8/14/2026 |
| 3.2.1 | 929 | 8/2/2026 |
| 3.2.0 | 357 | 7/18/2026 |
| 3.1.7 | 768 | 7/1/2026 |
| 3.1.6 | 760 | 6/22/2026 |
Three fixes to the same complaint: a host composed exactly as the documentation describes did not
start. Each one was a registration the composites assumed somebody else had made — a tracer, a unit
of work, a Redis connection — and each is now made by the registration that needs it. Nothing that
already worked changes: every fix defers to a registration the host makes itself, in either order,
so the lines a working host added to get past these gaps can simply be deleted. Additive on every
published surface.
### Fixed
- **A host without Redis starts and dispatches.** Every composite that carries a dispatcher
registered the projection-replay state, and its only implementation took a Redis connection that
no composite registers, so a host composed as documented failed at its first dispatch unless it
also ran Redis and called `AddCaching()`. `AddProjectionReplayState()` now chooses at first
resolution: with a registered `IConnectionMultiplexer` the Redis-backed state as before, without
one an in-process state with the same lease semantics — and a warning, once at start-up
(`104_012`), that replay coordination is confined to that process, so a replay requested there
suppresses publication there only. A deployment whose replay must reach several hosts registers
the shared connection, in either order. Redis-backed hosts observe no change.
- **Registering a store context now registers its unit of work.**
`AddNpgsqlWriteDbContextFactory<T>()` registered the context factory, the context and the default
connection resolver but not the `IWriteUnitOfWork` that the event source, the outbox dispatcher and
the command worker take from the container — and nothing else in the published packages did, so a
host composed exactly as documented failed at its first command with a dependency-injection error.
The write registration now try-adds a scoped `IWriteUnitOfWork` over its context, and
`AddNpgsqlReadDbContextFactory<T>()` try-adds `IProjectionsUnitOfWork` and `IReadUnitOfWork`
likewise. A unit of work the host registers itself, before or after, is still the one used; a
hand-written registration can simply be deleted.
- **`AddMediator()` no longer requires the host to register an OpenTelemetry `Tracer`.** The
mediator traces every dispatch and obtained its tracer from the host, but nothing registered one,
so a host that called `AddMediator()` and nothing else failed at the first resolve of `IMediator`.
`AddMediator()` now registers a fallback that emits the dispatch spans from the framework's
`Stratara.Application` activity source — a host that subscribes to framework telemetry sees them,
a host that subscribes to nothing pays for nothing. A `Tracer` the host registers, before or after
`AddMediator()`, is still the one used, so no existing host changes behaviour; the registration
line can simply be deleted. The samples, the README and the package README no longer carry it.