# SignalRs

Server-side SignalR hub infrastructure: hub base class, session management, data source with change tracking, and client broadcast service.

## Key Files

### Hub
- **`AcWebSignalRHubBase.cs`** — Abstract hub extending `Hub<IAcSignalRHubItemServer>`. Manages connection lifecycle, message dispatch via `DynamicMethodRegistry`, binary/JSON parameter deserialization. Response methods: `ResponseToCaller()`, `SendMessageToOthers()`, `SendMessageToUserIdInternal()`.
- **`IAcSignalRHubItemServer.cs`** — Server hub interfaces: `IAcSignalRHubItemServer`, `IAcSignalRHubServer`.
- **`AcLoggerSignalRHub.cs`** — Specialized hub for receiving log items via SignalR (`AddLogItem()`).

### Session & Broadcast
- **`AcSessionService.cs`** — Generic session manager with `ConcurrentDictionary<TSessionItemId, TSessionItem>`.
- **`IAcSessionItem.cs`** — Session item interface with `SessionId` property.
- **`AcSignalRSendToClientService.cs`** — Abstract broadcast service: `SendMessageToClient()`, `SendMessageToAllClients()`, `SendMessageToConnection()`, `SendMessageToUser()`.

### Data Source
- **`AcSignalRDataSource.cs`** — Server-side data source implementing `IList<T>` with change tracking (`TrackingItem<T, TId>`, `ChangeTracking<T, TId>`). Supports `LoadDataSource()`, `LoadDataSourceFromResponseData()` with binary/JSON deserialization.

### Utilities
- **`ExtensionMethods.cs`** — `InvokeMethod()` — invokes methods and unwraps `Task`/`Task<T>`/`ValueTask` results.
- **`TrackingItemHelpers.cs`** — Deep clone helpers: `JsonClone<T>()`, `ReflectionClone<T>()`.