TDbTenantCatalog Class
Default ITenantCatalog implementation that stores tenants, shards and identifiers in a database, using the Aurelius entities declared in Aurelius.Tenancy.Catalog.Entities.
Remarks
The catalog tables belong to their own mapping model (Biz.TenantCatalog), so they can live in any database, including a dedicated catalog database or one of the shard databases. Call UpdateSchema once to create or update the tables. Every method takes a connection from the pool and uses its own TObjectManager, so the catalog can be shared between threads.
The catalog stores only routing information; the connection settings of the shard databases stay in the application.
Syntax
Unit: Aurelius.Tenancy.Catalog.Db
TDbTenantCatalog = class(TCustomTenantCatalog);Constructors
| Name | Description |
|---|---|
| Create | Creates a new TDbTenantCatalog over the given connection pool. |
Methods
| Name | Description |
|---|---|
| FindShard | Returns the catalog record of a shard. |
| FindTenant | Returns the catalog record of a tenant. |
| FindTenantByIdentifier | Returns the tenant associated with an external identifier. |
| GetShards | Returns all registered shards, ordered by shard id. |
| RemoveIdentifier | Removes an external identifier. Nothing happens if the identifier is unknown. |
| SaveIdentifier | Associates an external identifier with a tenant, replacing any previous association of the same identifier. |
| SaveShard | Creates or updates a shard record. |
| SaveTenant | Creates or updates a tenant record. |
| UpdateSchema | Creates or updates the catalog tables in the catalog database. |