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# AWS::EC2::VPCEndpointConnectionNotification

Specifies a connection notification for a VPC endpoint or VPC endpoint service. A connection notification notifies you of specific endpoint events. You must create an SNS topic to receive notifications. For more information, see [Create a Topic](https://docs.aws.amazon.com/sns/latest/dg/CreateTopic.html) in the *Amazon Simple Notification Service Developer Guide*.
You can create a connection notification for interface endpoints only.
## Syntax

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

```
{
 "Type" : "AWS::EC2::VPCEndpointConnectionNotification",
 "Properties" : {
 "[ConnectionEvents](#cfn-ec2-vpcendpointconnectionnotification-connectionevents)" : {{[ String, ... ]}},
 "[ConnectionNotificationArn](#cfn-ec2-vpcendpointconnectionnotification-connectionnotificationarn)" : {{String}},
 "[ServiceId](#cfn-ec2-vpcendpointconnectionnotification-serviceid)" : {{String}},
 "[VPCEndpointId](#cfn-ec2-vpcendpointconnectionnotification-vpcendpointid)" : {{String}}
 }
}
```
### YAML

```
Type: AWS::EC2::VPCEndpointConnectionNotification
Properties:
 [ConnectionEvents](#cfn-ec2-vpcendpointconnectionnotification-connectionevents): {{
 - String}}
 [ConnectionNotificationArn](#cfn-ec2-vpcendpointconnectionnotification-connectionnotificationarn): {{String}}
 [ServiceId](#cfn-ec2-vpcendpointconnectionnotification-serviceid): {{String}}
 [VPCEndpointId](#cfn-ec2-vpcendpointconnectionnotification-vpcendpointid): {{String}}
```
## Properties

`ConnectionEvents` 
The endpoint events for which to receive notifications. Valid values are `Accept`, `Connect`, `Delete`, and `Reject`. 
*Required*: Yes 
*Type*: Array of String 
*Update requires*: [No interruption](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)
`ConnectionNotificationArn` 
The ARN of the SNS topic for the notifications. 
*Required*: Yes 
*Type*: String 
*Update requires*: [No interruption](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)
`ServiceId` 
The ID of the endpoint service. 
*Required*: No 
*Type*: String 
*Update requires*: [Replacement](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-replacement)
`VPCEndpointId` 
The ID of the endpoint. 
*Required*: No 
*Type*: String 
*Update requires*: [Replacement](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-replacement)
## Return values

### Ref

When you pass the logical ID of this resource to the intrinsic `Ref` function, `Ref` returns the ID of the notification.
For more information about using the `Ref` function, see [https://docs.aws.amazon.com/AWSCloudFormation/latest/TemplateReference/intrinsic-function-reference-ref.html](https://docs.aws.amazon.com/AWSCloudFormation/latest/TemplateReference/intrinsic-function-reference-ref.html).
### Fn::GetAtt

The `Fn::GetAtt` intrinsic function returns a value for a specified attribute of this type. The following are the available attributes and sample return values.
For more information about using the `Fn::GetAtt` intrinsic function, see [https://docs.aws.amazon.com/AWSCloudFormation/latest/TemplateReference/intrinsic-function-reference-getatt.html](https://docs.aws.amazon.com/AWSCloudFormation/latest/TemplateReference/intrinsic-function-reference-getatt.html).
#### 

`VPCEndpointConnectionNotificationId` 
The ID of the notification.</div><div class="naked_ctrl">
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