# MetricDestinationSummary
<a name="API_MetricDestinationSummary"></a>

A structure that displays information about one destination that CloudWatch RUM sends extended metrics to.

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

 ** Destination **   <a name="cloudwatchrum-Type-MetricDestinationSummary-Destination"></a>
Specifies whether the destination is `CloudWatch` or `Evidently`.  
Type: String  
Valid Values: `CloudWatch | Evidently`   
Required: No

 ** DestinationArn **   <a name="cloudwatchrum-Type-MetricDestinationSummary-DestinationArn"></a>
If the destination is `Evidently`, this specifies the ARN of the Evidently experiment that receives the metrics.  
Type: String  
Length Constraints: Minimum length of 0. Maximum length of 2048.  
Pattern: `.*arn:[^:]*:[^:]*:[^:]*:[^:]*:.*`   
Required: No

 ** IamRoleArn **   <a name="cloudwatchrum-Type-MetricDestinationSummary-IamRoleArn"></a>
This field appears only when the destination is `Evidently`. It specifies the ARN of the IAM role that is used to write to the Evidently experiment that receives the metrics.  
Type: String  
Pattern: `.*arn:[^:]*:[^:]*:[^:]*:[^:]*:.*`   
Required: No

## See Also
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For more information about using this API in one of the language-specific AWS SDKs, see the following:
+  [AWS SDK for C\$1\$1](https://docs.aws.amazon.com/goto/SdkForCpp/rum-2018-05-10/MetricDestinationSummary) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/rum-2018-05-10/MetricDestinationSummary) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/rum-2018-05-10/MetricDestinationSummary)