# Class WorkflowEngineHub

OptimaJet.Workflow.RealTimeTrackingPlugin.Hubs.WorkflowEngineHub

SignalR hub.

Namespace: [OptimaJet.Workflow.RealTimeTrackingPlugin.Hubs](https://api.workflowengine.io/realtime-tracking-plugin/OptimaJet.Workflow.RealTimeTrackingPlugin.Hubs/)

```csharp
public class WorkflowEngineHub : Hub, IDisposable
```

## Type Hierarchy

-   [Hub](https://learn.microsoft.com/dotnet/api/microsoft.aspnetcore.signalr.hub)
    -   WorkflowEngineHub Current type
        -   Implemented interfaces
            -   [IDisposable](https://learn.microsoft.com/dotnet/api/system.idisposable)

## Constructors

`public WorkflowEngineHub(NotifierService notifierService)` 

Initializes a new instance of the [WorkflowEngineHub](https://api.workflowengine.io/realtime-tracking-plugin/OptimaJet.Workflow.RealTimeTrackingPlugin.Hubs/WorkflowEngineHub/) class.

### Parameters

| Name | Type | Description |
| --- | --- | --- |
| `notifierService` | `NotifierService` | The service used to send notifications. |

## Methods

`public override Task OnDisconnectedAsync(Exception? exception)` 

Event that is triggered when a client disconnects from the hub.

### Parameters

| Name | Type | Description |
| --- | --- | --- |
| `exception` | `Exception` | The exception, if any that caused the disconnection. |

### Returns

| Type | Description |
| --- | --- |
| `Task` |  |

`public Task JoinTracking(string processId)` 

A hub method for adding a client to tracking.

### Parameters

| Name | Type | Description |
| --- | --- | --- |
| `processId` | `String` | ProcessId of the ProcessInstance. |

### Returns

| Type | Description |
| --- | --- |
| `Task` |  |

[Previous RealTimeTrackingPluginSettings](https://api.workflowengine.io/realtime-tracking-plugin/OptimaJet.Workflow.RealTimeTrackingPlugin/RealTimeTrackingPluginSettings/) [Next BaseNotifier](https://api.workflowengine.io/realtime-tracking-plugin/OptimaJet.Workflow.RealTimeTrackingPlugin.Notifiers/BaseNotifier/)