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AyCode.Core/AyCode.Services.Server/SignalRs/README.md

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SignalRs

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

Architecture: For full dispatch flow, tag system, and tech debt documentation see AyCode.Services/docs/SIGNALR/README.md.

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

Full specification: AyCode.Services.Server/docs/SIGNALR/SIGNALR_DATASOURCE.md

  • AcSignalRDataSource.cs — Generic real-time collection (AcSignalRDataSource<TDataItem, TId, TIList>) implementing IList<T> with full CRUD and change tracking.
    • Change tracking: TrackingItem<T, TId> wraps each modified item with TrackingState + OriginalValue for rollback. ChangeTracking<T, TId> manages the tracking list.
    • Loading: LoadDataSource() (sync), LoadDataSourceAsync() (async callback), LoadItem(id) (single). Binary path uses BinaryToMerge() for AcObservableCollection (batch UI update via BeginUpdate/EndUpdate).
    • Saving: SaveChanges() iterates tracked items, posts each via CRUD tag, rollbacks on failure. SaveItem() for individual saves.
    • Sync state: IsSyncing (Interlocked counter) + OnSyncingStateChanged event for UI loading indicators.
    • Locking: object _syncRoot (sync ops) + SemaphoreSlim _asyncLock (async ops). GetEnumerator() returns safe copy.
    • Working reference list: SetWorkingReferenceList() allows external list to become inner storage (zero-copy).
    • Context: ContextIds (object[]) + FilterText (string) sent with GetAll requests for server-side filtering.

Utilities

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