# Interface IHubOperationContext

OptimaJet.Workflow.Api.Configuration.IHubOperationContext

Provides state for one client invocation of a hub method.

Namespace: [OptimaJet.Workflow.Api.Configuration](https://api.workflowengine.io/web-api/OptimaJet.Workflow.Api.Configuration/)

```csharp
public interface IHubOperationContext
```

## Properties

`string OperationId { get; }` 

Gets the permanent operation ID.

`Hub Hub { get; }` 

Gets the hub instance for this invocation.

`HubCallerContext Caller { get; }` 

Gets the SignalR caller context.

`MethodInfo Method { get; }` 

Gets the method selected by SignalR.

`IReadOnlyList<object?> Arguments { get; }` 

Gets the current bound arguments. Treat their nested values as read-only after OnBefore.

`IServiceProvider Services { get; }` 

Gets the service scope for this invocation, not the connection's HTTP scope.

`ClaimsPrincipal User { get; }` 

Gets the connection principal.

`CancellationToken CancellationToken { get; }` 

Gets the connection-aborted token. Cancellation is not converted into a fallback.

`HttpContext? HttpContext { get; }` 

Gets the connection HTTP context when the transport provides one.

`string? TenantId { get; }` 

Gets the normalized tenant ID captured before callbacks. This property alone does not grant tenant access.

`IDictionary<object, object?> Items { get; }` 

Gets data shared by callbacks for this invocation only.

## Methods

`void ReplaceArguments(IReadOnlyList<object?> arguments)` 

Replaces the complete argument list during OnBefore. Argument count and types must match the selected method.

### Parameters

| Name | Type | Description |
| --- | --- | --- |
| `arguments` | `IReadOnlyList<Object>` | The replacement arguments; the list is copied. |

### Exceptions

| Type | Description |
| --- | --- |
| `InvalidOperationException` | Called outside OnBefore or with incompatible arguments. |

[Previous IHubOperationBuilder](https://api.workflowengine.io/web-api/OptimaJet.Workflow.Api.Configuration/IHubOperationBuilder/) [Next IOperationBuilder<TInput, TSuccess>](https://api.workflowengine.io/web-api/OptimaJet.Workflow.Api.Configuration/IOperationBuilder-TInput-TSuccess/)