The AWS::CloudFormation::WaitConditionHandle type has no properties. When
you reference the WaitConditionHandle resource by using the Ref
function, CloudFormation returns a presigned URL. You pass this URL to
applications or scripts that are running on your Amazon EC2 instances to send
signals to that URL. An associated AWS::CloudFormation::WaitCondition resource
checks the URL for the required number of success signals or for a failure signal.
For more information, see Create wait conditions in a CloudFormation template in the AWS CloudFormation User Guide.
Anytime you add a WaitCondition resource during a stack update or update a
resource with a wait condition, you must associate the wait condition with a new
WaitConditionHandle resource. Don't reuse an old wait condition handle that
has already been defined in the template. If you reuse a wait condition handle, the wait
condition might evaluate old signals from a previous create or update stack command.
Updates aren't supported for this resource.
Syntax
To declare this entity in your AWS CloudFormation template, use the following syntax:
JSON
{
"Type" : "AWS::CloudFormation::WaitConditionHandle"
}
YAML
Type: AWS::CloudFormation::WaitConditionHandleReturn values
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 Fn::GetAtt.
Id-
A unique identifier for the resource.
