# ActivityStartedEventDetails
<a name="API_ActivityStartedEventDetails"></a>

Contains details about the start of an activity during an execution.

## Contents
<a name="API_ActivityStartedEventDetails_Contents"></a>

 ** workerName **   <a name="StepFunctions-Type-ActivityStartedEventDetails-workerName"></a>
The name of the worker that the task is assigned to. These names are provided by the workers when calling [GetActivityTask](API_GetActivityTask.md).  
Type: String  
Length Constraints: Maximum length of 256.  
Required: No

## See Also
<a name="API_ActivityStartedEventDetails_SeeAlso"></a>

For more information about using this API in one of the language-specific Amazon SDKs, see the following:
+  [Amazon SDK for C\$1\$1](https://docs.amazonaws.cn/goto/SdkForCpp/states-2016-11-23/ActivityStartedEventDetails) 
+  [Amazon SDK for Java V2](https://docs.amazonaws.cn/goto/SdkForJavaV2/states-2016-11-23/ActivityStartedEventDetails) 
+  [Amazon SDK for Ruby V3](https://docs.amazonaws.cn/goto/SdkForRubyV3/states-2016-11-23/ActivityStartedEventDetails)