Stratara.EventSourcing.EntityFrameworkCore
4.0.2
Prefix Reserved
See the version list below for details.
dotnet add package Stratara.EventSourcing.EntityFrameworkCore --version 4.0.2
NuGet\Install-Package Stratara.EventSourcing.EntityFrameworkCore -Version 4.0.2
<PackageReference Include="Stratara.EventSourcing.EntityFrameworkCore" Version="4.0.2" />
<PackageVersion Include="Stratara.EventSourcing.EntityFrameworkCore" Version="4.0.2" />
<PackageReference Include="Stratara.EventSourcing.EntityFrameworkCore" />
paket add Stratara.EventSourcing.EntityFrameworkCore --version 4.0.2
#r "nuget: Stratara.EventSourcing.EntityFrameworkCore, 4.0.2"
#:package Stratara.EventSourcing.EntityFrameworkCore@4.0.2
#addin nuget:?package=Stratara.EventSourcing.EntityFrameworkCore&version=4.0.2
#tool nuget:?package=Stratara.EventSourcing.EntityFrameworkCore&version=4.0.2
Stratara.EventSourcing.EntityFrameworkCore
Derived. The behaviour described here is specified under
openspec/specs/. Those specifications are the source; this page explains and illustrates them.
License: MIT.
EF Core persistence for the Stratara event-sourced stack — PostgreSQL flavoured via Npgsql + pgvector. Bundles four previously-separate Stratara projects into one NuGet because they always ship together:
| Folder | Contents | Old csproj |
|---|---|---|
EntityFrameworkCore/ |
shared EF conventions, value generators, IDbContext / IReadDbContext / IWriteDbContext / ITenantScopedDbContext / IIdentityDbContext, UnitOfWork base, DefaultDbResolver, NpgsqlDbContextServiceCollectionExtensions, DbContextMigrationUtility |
Stratara.EntityFrameworkCore |
WriteStore/ |
WriteDbContext, WriteUnitOfWork, event-stream/snapshot/event-chain/command-audit/outbox repositories + entity configurations |
Stratara.EventSourcing.EntityFrameworkCore.WriteStore |
ReadStore/ |
ReadDbContext, ReadUnitOfWork, ProjectionsUnitOfWork, Tenant repository, projection entity configurations |
Stratara.EventSourcing.EntityFrameworkCore.ReadStore |
IdentityStore/ |
Generic ASP.NET Identity IdentityDbContext + marker |
Stratara.EventSourcing.EntityFrameworkCore.IdentityStore |
Everything lives under Stratara.EventSourcing.EntityFrameworkCore and its sub-namespaces (.WriteStore, .ReadStore, .IdentityStore, .Abstractions, .Conventions, .Extensions, .HealthChecks, .Migration). The DI extensions sit in Microsoft.Extensions.DependencyInjection, per the Microsoft convention, so they resolve without an extra using.
Why folded
WriteStore-without-ReadStore is not a real use case. EF conventions + value generators + UnitOfWork primitives are foundational for every other store. ASP.NET Identity glue follows the same EF Core conventions. Splitting into 4 NuGets that always ship together adds version-management noise (4× <PackageVersion> to keep in sync, transitive-resolution risk) without any consumer benefit.
If your application doesn't use ASP.NET Identity, simply don't reference IdentityDbContext-derived types — the rest of the package works without them.
Quick start
Derive your contexts from the generic base classes — the type argument is the context itself:
using Stratara.EventSourcing.EntityFrameworkCore.WriteStore;
using Stratara.EventSourcing.EntityFrameworkCore.ReadStore;
public sealed class MyAppWriteDbContext(DbContextOptions<MyAppWriteDbContext> options)
: WriteDbContext<MyAppWriteDbContext>(options);
public sealed class MyAppReadDbContext(DbContextOptions<MyAppReadDbContext> options)
: ReadDbContext<MyAppReadDbContext>(options);
Then register the Npgsql context factories and the write store:
// In your AppHost / Worker / Web project:
builder.Services
.AddNpgsqlWriteDbContextFactory<MyAppWriteDbContext>()
.AddNpgsqlReadDbContextFactory<MyAppReadDbContext>()
.AddWriteStore(builder.Configuration); // binds Stratara:EventSourcing options
Most hosts don't call these directly — the worker composites in Stratara.EventSourcing.WorkerDefaults
(AddCommandWorkerServices(), AddEventProjectionWorkerServices(), …) already compose AddWriteStore
for you. Reach for the explicit form when you build a host that none of the composites fit.
Renamed in 3.2.0, removed in 4.0.0: the write-side factory was
AddNpsqlWriteDbContextFactory(missing theg) through 3.1.x.AddNpgsqlWriteDbContextFactoryreplaced it in 3.2.0 and the old spelling stayed as an[Obsolete]alias until 4.0.0, which removed it. A host still on the old spelling adds theg; nothing else about the call changes.
Health checks
Two opt-in readiness checks plug into any IHealthChecksBuilder (they require the write store above to be registered):
builder.Services.AddHealthChecks()
.AddEventStoreHealthCheck() // write-side DB reachable?
.AddOutboxHealthCheck(degradedThreshold: 1_000, // outbox backlog depth
unhealthyThreshold: 10_000);
AddEventStoreHealthCheck()— probes write-store connectivity;Unhealthywhen the database cannot be reached.AddOutboxHealthCheck(degradedThreshold?, unhealthyThreshold?)— reports the pending outbox backlog under thependingdata key and escalates toDegraded/Unhealthywhen the count crosses the supplied thresholds (omit them to stay healthy while reachable).
Both are tagged ready by default, so they show up on a readiness endpoint rather than the liveness (live) one.
Dependencies
Stratara.Projections— for projection types used byProjectionsUnitOfWork.Stratara.Shared— for diagnostics + abstractions + resilience.Npgsql.EntityFrameworkCore.PostgreSQL,EFCore.NamingConventions,Microsoft.AspNetCore.Identity.EntityFrameworkCore,Microsoft.EntityFrameworkCore,Microsoft.Extensions.Diagnostics.HealthChecks,Pgvector.EntityFrameworkCore.
| 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
- EFCore.NamingConventions (>= 10.0.1)
- Microsoft.AspNetCore.Identity.EntityFrameworkCore (>= 10.0.11)
- Microsoft.EntityFrameworkCore (>= 10.0.11)
- Microsoft.Extensions.DependencyInjection (>= 10.0.11)
- Microsoft.Extensions.Diagnostics.HealthChecks (>= 10.0.11)
- Microsoft.Extensions.Hosting (>= 10.0.11)
- Npgsql.EntityFrameworkCore.PostgreSQL (>= 10.0.3)
- Pgvector.EntityFrameworkCore (>= 0.3.0)
- Stratara.Projections (>= 4.0.2)
- Stratara.Shared (>= 4.0.2)
NuGet packages (3)
Showing the top 3 NuGet packages that depend on Stratara.EventSourcing.EntityFrameworkCore:
| Package | Downloads |
|---|---|
|
Stratara.Infrastructure
Infrastructure glue for the Stratara framework — authorization decorators, configuration providers, and DI composition helpers that wire Mediator, Outbox, Identity, and EF Core into a hosted app. |
|
|
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. |
|
|
Stratara.Testing.EntityFrameworkCore
Spin up the real Stratara event-sourcing write stack (EventSource, aggregation, snapshots, the EF Core write store) against a shared in-memory SQLite database in one call — production code paths, no Postgres, no Docker. Builds on Stratara.Testing's in-memory doubles. |
GitHub repositories
This package is not used by any popular GitHub repositories.
| Version | Downloads | Last Updated |
|---|---|---|
| 4.0.3 | 41 | 9/3/2026 |
| 4.0.2 | 136 | 9/3/2026 |
| 4.0.1 | 94 | 9/2/2026 |
| 4.0.0 | 150 | 8/31/2026 |
| 4.0.0-preview.1 | 56 | 8/31/2026 |
| 3.4.0 | 146 | 8/28/2026 |
| 3.3.0 | 119 | 8/25/2026 |
| 3.2.3 | 132 | 8/22/2026 |
| 3.2.2 | 126 | 8/14/2026 |
| 3.2.1 | 131 | 8/2/2026 |
| 3.2.0 | 153 | 7/18/2026 |
| 3.1.7 | 329 | 7/1/2026 |
| 3.1.6 | 568 | 6/22/2026 |
| 3.1.5 | 156 | 6/22/2026 |
| 3.1.4 | 164 | 6/15/2026 |
| 3.1.3 | 153 | 6/10/2026 |
| 3.1.2 | 168 | 6/5/2026 |
| 3.1.1 | 233 | 6/1/2026 |
| 3.1.0 | 137 | 5/30/2026 |
| 3.0.23 | 141 | 5/28/2026 |
Two operational fixes, both found while a consumer rolled out bus-envelope signing and reasoned
about rebuilding its read models: a projection replay now survives a passing failure, and an
integrity failure says whether the signature was absent or wrong. Additive on every published
surface.
### Added
- **A projection replay retries a failing batch before it gives up.** Each batch — the read from
the event store and the application of its entries — now runs under a new named policy,
`ResilienceNames.ProjectionReplayBatch`: five attempts in all, exponential backoff from one second
with jitter between them, any exception except cancellation. A read-store timeout or a
dropped connection mid-rebuild no longer ends the replay; a failure that persists through every
attempt ends it exactly as before, with the same failure record. A retried batch is applied
again from its first entry in a fresh scope, which relies on the guarantee projections already
give under at-least-once delivery: a second application converges (see *Write handlers that
converge rather than accumulate* in the projection guide). Each failed attempt logs a new
warning, `104_011`. `AddResiliencePipelines` registers six policies rather than five. Nothing
about truncation, ordering, progress, the failure record or the lease changes.
### Changed
- **An integrity failure now says whether the signature was absent or wrong, and the existing
warning and error ids fire only for a signature that is present and does not verify.** An
unsigned envelope — what every not-yet-restarted publisher emits during a `Permissive` roll —
was logged as *"signature mismatch"* under the same id as a key mismatch or tampering, so an
operator could not tell a rolling restart from an attack without correlating host start times.
Four new event ids carry the unsigned case: `105_004` (command, permissive), `111_004` (event
bundle, permissive), `105_105` (command, strict) and `111_105` (event bundle, strict). The
existing `105_003`, `111_003`, `105_104` and `111_104` keep their numbers and their level but
now mean a present signature that did not verify; an alert keyed on one of them goes quiet
during a roll instead of firing for every unsigned message. Strict-mode rejections name the
case in their exception message. `BusEnvelopeIntegrityVerifier.Verify` gains an overload with
`out BusEnvelopeIntegrityFailure` (`None`, `Absent`, `Invalid`); the existing overload and the
`BusEnvelopeIntegrityResult` values are unchanged. An absent signature no longer reaches the
signer, which already answered `false` for it.