# ServiceFunction
<a name="API_ServiceFunction"></a>

Represents a logical component of a service.

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

 ** criticality **   <a name="ngresiliencehub-Type-ServiceFunction-criticality"></a>
The criticality level of the service function.  
Type: String  
Valid Values: `PRIMARY | SUPPLEMENTAL`   
Required: Yes

 ** name **   <a name="ngresiliencehub-Type-ServiceFunction-name"></a>
Entity label (not part of ARN — spaces allowed).  
Type: String  
Length Constraints: Minimum length of 2. Maximum length of 60.  
Pattern: `[A-Za-z0-9][A-Za-z0-9 _\-]{1,59}`   
Required: Yes

 ** serviceArn **   <a name="ngresiliencehub-Type-ServiceFunction-serviceArn"></a>
ARN identifier.  
Type: String  
Length Constraints: Minimum length of 31.  
Pattern: `arn:(aws|aws-cn|aws-iso|aws-iso-[a-z]{1}|aws-us-gov):[A-Za-z0-9][A-Za-z0-9_/.-]{0,62}:([a-z]{2}-((iso[a-z]{0,1}-)|(gov-)){0,1}[a-z]+-[0-9]):[0-9]{12}:[A-Za-z0-9/][A-Za-z0-9:_/+.-]{0,1023}`   
Required: Yes

 ** serviceFunctionId **   <a name="ngresiliencehub-Type-ServiceFunction-serviceFunctionId"></a>
The unique identifier of the service function.  
Type: String  
Length Constraints: Minimum length of 1. Maximum length of 255.  
Pattern: `\S{1,255}`   
Required: Yes

 ** createdAt **   <a name="ngresiliencehub-Type-ServiceFunction-createdAt"></a>
The timestamp when the service function was created.  
Type: Timestamp  
Required: No

 ** description **   <a name="ngresiliencehub-Type-ServiceFunction-description"></a>
Resource description.  
Type: String  
Length Constraints: Minimum length of 0. Maximum length of 500.  
Required: No

 ** resourceCount **   <a name="ngresiliencehub-Type-ServiceFunction-resourceCount"></a>
The number of resources associated with the service function.  
Type: Integer  
Required: No

 ** source **   <a name="ngresiliencehub-Type-ServiceFunction-source"></a>
The source of the service function.  
Type: String  
Valid Values: `AI_GENERATED | USER`   
Required: No

 ** updatedAt **   <a name="ngresiliencehub-Type-ServiceFunction-updatedAt"></a>
The timestamp when the service function was last updated.  
Type: Timestamp  
Required: No

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

For more information about using this API in one of the language-specific AWS SDKs, see the following:
+  [AWS SDK for C\+\+](https://docs.aws.amazon.com/goto/SdkForCpp/resiliencehubv2-2026-02-17/ServiceFunction) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/resiliencehubv2-2026-02-17/ServiceFunction) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/resiliencehubv2-2026-02-17/ServiceFunction)