# CanaryCodeOutput
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This structure contains information about the canary's Lambda handler and where its code is stored by CloudWatch Synthetics.

## Contents
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 ** BlueprintTypes **   <a name="synthetics-Type-CanaryCodeOutput-BlueprintTypes"></a>
 `BlueprintTypes` is a list of templates that enable simplified canary creation. You can create canaries for common monitoring scenarios by providing only a JSON configuration file instead of writing custom scripts. The only supported value is `multi-checks`.  
Multi-checks monitors HTTP/DNS/SSL/TCP endpoints with built-in authentication schemes (Basic, API Key, OAuth, SigV4) and assertion capabilities. When you specify `BlueprintTypes`, the `Handler` field cannot be specified since the blueprint provides a pre-defined entry point.  
 `BlueprintTypes` is supported only on canaries for syn-nodejs-3.0 runtime or later.  
Type: Array of strings  
Array Members: Minimum number of 0 items. Maximum number of 1 item.  
Length Constraints: Minimum length of 1. Maximum length of 128.  
Pattern: `[0-9a-zA-Z_\-\.]+`   
Required: No

 ** Dependencies **   <a name="synthetics-Type-CanaryCodeOutput-Dependencies"></a>
A list of dependencies that are used for running this canary. The dependencies are specified as a key-value pair, where the key is the type of dependency and the value is the dependency reference.  
Type: Array of [Dependency](API_Dependency.md) objects  
Array Members: Minimum number of 0 items. Maximum number of 1 item.  
Required: No

 ** Handler **   <a name="synthetics-Type-CanaryCodeOutput-Handler"></a>
The entry point to use for the source code when running the canary.  
This field is required when you don't specify `BlueprintTypes` and is not allowed when you specify `BlueprintTypes`.  
Type: String  
Length Constraints: Minimum length of 1. Maximum length of 1024.  
Required: No

 ** SourceLocationArn **   <a name="synthetics-Type-CanaryCodeOutput-SourceLocationArn"></a>
The ARN of the Lambda layer where Synthetics stores the canary script code.  
Type: String  
Length Constraints: Minimum length of 1. Maximum length of 1024.  
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/synthetics-2017-10-11/CanaryCodeOutput) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/synthetics-2017-10-11/CanaryCodeOutput) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/synthetics-2017-10-11/CanaryCodeOutput)