# EventSource
<a name="API_EventSource"></a>

 **[Event-based policies only]** Specifies an event that activates an event-based policy.

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

 ** Type **   <a name="dlm-Type-EventSource-Type"></a>
The source of the event. Currently only managed Amazon EventBridge (formerly known as Amazon CloudWatch) events are supported.  
Type: String  
Valid Values: `MANAGED_CWE`   
Required: Yes

 ** Parameters **   <a name="dlm-Type-EventSource-Parameters"></a>
Information about the event.  
Type: [EventParameters](API_EventParameters.md) object  
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/dlm-2018-01-12/EventSource) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/dlm-2018-01-12/EventSource) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/dlm-2018-01-12/EventSource)