# Interface IWorkflowServiceRunner

OptimaJet.Workflow.Core.Runtime.ServiceRunners.IWorkflowServiceRunner

Defines how a workflow runtime starts and configures its service loop.

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

```csharp
public interface IWorkflowServiceRunner
```

## Type Hierarchy

-   IWorkflowServiceRunner Current type
    -   Implementing types
        -   [MultiServerServiceRunner](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Runtime.ServiceRunners/MultiServerServiceRunner/)
        -   [SingleServerServiceRunner](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Runtime.ServiceRunners/SingleServerServiceRunner/)

## Properties

`bool IsSupportsMultiServer { get; }` 

Gets a value indicating whether this runner supports multi-server execution.

## Methods

`Task StartAsync(ITimerManager manager)` 

Starts service-specific runtime initialization.

### Parameters

| Name | Type | Description |
| --- | --- | --- |
| `manager` | `ITimerManager` | The [ITimerManager](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Runtime/ITimerManager/) to use during startup, if available. |

### Returns

| Type | Description |
| --- | --- |
| `Task` | A task that completes when runner startup initialization is finished. |

### Remarks

The implementation may start timers and run process restore operations according to the selected execution mode.

## Remarks

Implementations are used by [WorkflowRuntime](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Runtime/WorkflowRuntime/) during startup and may perform environment-specific restore and timer initialization.

[Previous RestoreDecisionTypes](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Runtime.ProcessRestoring/RestoreDecisionTypes/) [Next MultiServerRestorer](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Runtime.ServiceRunners/MultiServerRestorer/)