// Invalidate objects in a distribution to force CloudFront to fetch the
// latest object data from the S3 origin.
String[] objectKeys = new String[] {"downloads.html"};
Invalidation invalidation = cloudFrontService.invalidateObjects(
testDistributionId,
objectKeys,
"" + System.currentTimeMillis() // Caller reference - a unique string value
);
System.out.println(invalidation);