Stratara.Domain 4.4.9

Stratara.Domain

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

License: MIT.

The Stratara framework's concrete multitenancy domain — the Tenant aggregate and its event vocabulary. Use this when your application wants Stratara's opinionated tenant model (one tenant per customer, lifecycle events for activate / deactivate / rename / locale-change / assignment) and the corresponding aggregate.

Contents

• Stratara.Domain.Multitenancy.Tenant — the aggregate. Implements IAggregate (from Stratara.Abstractions).
• Stratara.Domain.TenantCreated / TenantRenamed / TenantActivated / TenantDeactivated / TenantDefaultLocaleChanged / TenantAssignedToCustomer / TenantDeleted — the event records consumed by the aggregate's Apply() methods + persisted to the event stream.
• Stratara.Domain.CustomerTenantsDeleted — the cascade event that deletes all of a customer's tenants at once. You append it to your own customer aggregate's stream; TenantProjection removes the listed tenants from the read model. No framework aggregate applies it, and your customer aggregate needs no Apply() for it: a rebuild skips an event the aggregate has no Apply() for without reading it. In a host that never registers the type, the first skip per process logs a warning; register it there with AddTrustedType<CustomerTenantsDeleted>() to acknowledge it. (An aggregate with an Apply() taking an interface, an abstract class or object reads every unresolvable event instead — see the snapshot guide.) It does not touch the tenants' own streams, so a Tenant rehydrated afterwards reads as deleted only if TenantDeleted was appended to its stream as well.

TenantCreated implements IAggregateCreationEvent, declaring the tenant it creates as the event's own data owner. A tenant therefore belongs to itself no matter which session performed the creation — an operator creating a tenant does not end up owning it. The interface is a compile-time contract read when the event is appended; it is not serialized, so the record's JSON is unchanged.

When to skip this package

If you're building a Stratara-on-Mediator application without the framework's tenant model (e.g. you have your own tenancy concept), reference Stratara.Abstractions alone for the marker interfaces. Most Stratara features (CQRS, event sourcing, projections, sagas) don't depend on Stratara.Domain.

Quick reference

// Open a Tenant stream from a command handler
await events.CreateAsync<Tenant>(tenantId,
    new TenantCreated(
        Id: tenantId,
        CustomerId: customerId,
        Name: "Acme",
        DefaultLocale: "de-DE",
        IsActive: true,
        CreatedAt: DateTimeOffset.UtcNow),
    cancellationToken);
await events.SaveChangesAsync(cancellationToken);

// Later: rehydrate the aggregate
var tenant = await aggregator.AggregateAsync<Tenant>(tenantId, cancellationToken: cancellationToken);

Dependencies

• Stratara.Abstractions — for IAggregate (Tenant implements it).
• JetBrains.Annotations — for static-analysis attributes.