# EnvironmentEnterSessionActionDefinitionSummary
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Defines the environment a session action enters in.

## Contents
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 ** environmentId **   <a name="deadlinecloud-Type-EnvironmentEnterSessionActionDefinitionSummary-environmentId"></a>
The environment ID.  
Type: String  
Length Constraints: Minimum length of 1. Maximum length of 1024.  
Pattern: `(STEP:step-[0-9a-f]{32}:.*)|(JOB:job-[0-9a-f]{32}:.*)`   
Required: Yes

## 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/deadline-2023-10-12/EnvironmentEnterSessionActionDefinitionSummary) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/deadline-2023-10-12/EnvironmentEnterSessionActionDefinitionSummary) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/deadline-2023-10-12/EnvironmentEnterSessionActionDefinitionSummary)