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# AWS::DLM::LifecyclePolicy EventSource
<a name="aws-properties-dlm-lifecyclepolicy-eventsource"></a>

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

## Syntax
<a name="aws-properties-dlm-lifecyclepolicy-eventsource-syntax"></a>

To declare this entity in your CloudFormation template, use the following syntax:

### JSON
<a name="aws-properties-dlm-lifecyclepolicy-eventsource-syntax.json"></a>

```
{
  "[Parameters](#cfn-dlm-lifecyclepolicy-eventsource-parameters)" : {{EventParameters}},
  "[Type](#cfn-dlm-lifecyclepolicy-eventsource-type)" : {{String}}
}
```

### YAML
<a name="aws-properties-dlm-lifecyclepolicy-eventsource-syntax.yaml"></a>

```
  [Parameters](#cfn-dlm-lifecyclepolicy-eventsource-parameters): {{
    EventParameters}}
  [Type](#cfn-dlm-lifecyclepolicy-eventsource-type): {{String}}
```

## Properties
<a name="aws-properties-dlm-lifecyclepolicy-eventsource-properties"></a>

`Parameters`  <a name="cfn-dlm-lifecyclepolicy-eventsource-parameters"></a>
Information about the event.  
*Required*: No  
*Type*: [EventParameters](aws-properties-dlm-lifecyclepolicy-eventparameters.md)  
*Update requires*: [No interruption](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)

`Type`  <a name="cfn-dlm-lifecyclepolicy-eventsource-type"></a>
The source of the event. Currently only managed Amazon EventBridge (formerly known as Amazon CloudWatch) events are supported.  
*Required*: Yes  
*Type*: String  
*Allowed values*: `MANAGED_CWE`  
*Update requires*: [No interruption](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)