callerReference property
A unique value (for example, a date-time stamp) that ensures that the request can't be replayed.
If the value of CallerReference is new (regardless of the
content of the CloudFrontOriginAccessIdentityConfig object), a
new origin access identity is created.
If the CallerReference is a value already sent in a previous
identity request, and the content of the
CloudFrontOriginAccessIdentityConfig is identical to the
original request (ignoring white space), the response includes the same
information returned to the original request.
If the CallerReference is a value you already sent in a
previous request to create an identity, but the content of the
CloudFrontOriginAccessIdentityConfig is different from the
original request, CloudFront returns a
CloudFrontOriginAccessIdentityAlreadyExists error.
Implementation
final String callerReference;