TenantId

Marks a field or property as containing the tenant identifier for multi-tenant applications.

The tenant ID identifies which tenant (organization, customer, etc.) the data belongs to. This annotation enables automatic tenant context propagation and data isolation in multi-tenant systems.

The framework uses this annotation to:

• Automatically set tenant context from requests

• Isolate data access by tenant boundaries

• Generate tenant-specific routing and storage

• Enforce tenant-based security policies

Example usage:

@AggregateRoot
class UserAggregate(
    @AggregateId
    val userId: String,

    @TenantId
    val tenantId: String  // Which organization this user belongs to
)

// Command that operates within a tenant context
data class CreateUserCommand(
    @AggregateId
    val userId: String,

    @TenantId
    val tenantId: String,  // Automatically populated from request context

    val email: String,
    val name: String
)

See also