class Aws::CloudFormation::Types::ResourceChangeDetail

For a resource with ‘Modify` as the action, the `ResourceChange` structure describes the changes CloudFormation will make to that resource.

@!attribute [rw] target

A `ResourceTargetDefinition` structure that describes the field that
CloudFormation will change and whether the resource will be
recreated.
@return [Types::ResourceTargetDefinition]

@!attribute [rw] evaluation

Indicates whether CloudFormation can determine the target value, and
whether the target value will change before you execute a change
set.

For `Static` evaluations, CloudFormation can determine that the
target value will change, and its value. For example, if you
directly modify the `InstanceType` property of an EC2 instance,
CloudFormation knows that this property value will change, and its
value, so this is a `Static` evaluation.

For `Dynamic` evaluations, can't determine the target value because
it depends on the result of an intrinsic function, such as a `Ref`
or `Fn::GetAtt` intrinsic function, when the stack is updated. For
example, if your template includes a reference to a resource that's
conditionally recreated, the value of the reference (the physical ID
of the resource) might change, depending on if the resource is
recreated. If the resource is recreated, it will have a new physical
ID, so all references to that resource will also be updated.
@return [String]

@!attribute [rw] change_source

The group to which the `CausingEntity` value belongs. There are five
entity groups:

* `ResourceReference` entities are `Ref` intrinsic functions that
  refer to resources in the template, such as `\{ "Ref" :
  "MyEC2InstanceResource" \}`.

* `ParameterReference` entities are `Ref` intrinsic functions that
  get template parameter values, such as `\{ "Ref" :
  "MyPasswordParameter" \}`.

* `ResourceAttribute` entities are `Fn::GetAtt` intrinsic functions
  that get resource attribute values, such as `\{ "Fn::GetAtt" : [
  "MyEC2InstanceResource", "PublicDnsName" ] \}`.

* `DirectModification` entities are changes that are made directly
  to the template.

* `Automatic` entities are `AWS::CloudFormation::Stack` resource
  types, which are also known as nested stacks. If you made no
  changes to the `AWS::CloudFormation::Stack` resource,
  CloudFormation sets the `ChangeSource` to `Automatic` because the
  nested stack's template might have changed. Changes to a nested
  stack's template aren't visible to CloudFormation until you run
  an update on the parent stack.
@return [String]

@!attribute [rw] causing_entity

The identity of the entity that triggered this change. This entity
is a member of the group that's specified by the `ChangeSource`
field. For example, if you modified the value of the `KeyPairName`
parameter, the `CausingEntity` is the name of the parameter
(`KeyPairName`).

If the `ChangeSource` value is `DirectModification`, no value is
given for `CausingEntity`.
@return [String]

@see docs.aws.amazon.com/goto/WebAPI/cloudformation-2010-05-15/ResourceChangeDetail AWS API Documentation

Constants

SENSITIVE