# Interface IActivityExceptionHandlerBuilder

OptimaJet.Workflow.Core.Model.Builder.IActivityExceptionHandlerBuilder

Provides operations for selecting how an [ActivityExceptionsHandler](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ActivityExceptionsHandler/) responds to a matching [Exception](https://learn.microsoft.com/dotnet/api/system.exception) raised during normal activity execution.

Namespace: [OptimaJet.Workflow.Core.Model.Builder](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model.Builder/)

```csharp
public interface IActivityExceptionHandlerBuilder : IActivityBuilder, IBaseActivityBuilder, IProcessDefinitionBuilder
```

## Type Hierarchy

-   IActivityExceptionHandlerBuilder Current type
    -   Base interfaces
        -   [IActivityBuilder](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model.Builder/IActivityBuilder/)
            -   [IBaseActivityBuilder](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model.Builder/IBaseActivityBuilder/)
                -   [IProcessDefinitionBuilder](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model.Builder/IProcessDefinitionBuilder/)

## Methods

`IActivityBuilder Retry(int retryCount)` 

Configures the handler to execute [ActivityDefinition.Implementation](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ActivityDefinition/) again when a matching [Exception](https://learn.microsoft.com/dotnet/api/system.exception) is raised.

### Parameters

| Name | Type | Description |
| --- | --- | --- |
| `retryCount` | `Int32` | The maximum number of additional attempts to execute [ActivityDefinition.Implementation](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ActivityDefinition/). The value must be greater than zero. |

### Returns

| Type | Description |
| --- | --- |
| `IActivityBuilder` | The current builder as an [IActivityBuilder](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model.Builder/IActivityBuilder/) for method chaining. |

### Exceptions

| Type | Description |
| --- | --- |
| `ArgumentException` | Thrown when `retryCount` is less than or equal to zero. |

`IActivityBuilder SetActivity(ActivityDefinition activity)` 

Configures the handler to move the process instance to the activity represented by `activity` when a matching [Exception](https://learn.microsoft.com/dotnet/api/system.exception) is raised.

### Parameters

| Name | Type | Description |
| --- | --- | --- |
| `activity` | `ActivityDefinition` | The target [ActivityDefinition](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ActivityDefinition/). |

### Returns

| Type | Description |
| --- | --- |
| `IActivityBuilder` | The current builder as an [IActivityBuilder](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model.Builder/IActivityBuilder/) for method chaining. |

`IActivityBuilder SetState(string stateName)` 

Configures the handler to move the process instance to the business state named by `stateName` when a matching [Exception](https://learn.microsoft.com/dotnet/api/system.exception) is raised.

### Parameters

| Name | Type | Description |
| --- | --- | --- |
| `stateName` | `String` | The name of the target business state. |

### Returns

| Type | Description |
| --- | --- |
| `IActivityBuilder` | The current builder as an [IActivityBuilder](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model.Builder/IActivityBuilder/) for method chaining. |

`IActivityBuilder Ignore()` 

Configures the handler to suppress a matching [Exception](https://learn.microsoft.com/dotnet/api/system.exception) so workflow execution can continue.

### Returns

| Type | Description |
| --- | --- |
| `IActivityBuilder` | The current builder as an [IActivityBuilder](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model.Builder/IActivityBuilder/) for method chaining. |

[Previous IActivityBuilder](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model.Builder/IActivityBuilder/) [Next IActivityImplementationBuilder](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model.Builder/IActivityImplementationBuilder/)