static boolean isBlobExpired(CloudBlobMetadata metadata, long currentTimeStamp) {
    return metadata.getExpirationTime() != Utils.Infinite_Time && metadata.getExpirationTime() < currentTimeStamp;
  }
Check if the blob is expired
@param metadata to check for expiration
@return true if expired. false otherwise
ambry-cloud/src/main/java/com/github/ambry/cloud/CloudBlobStore.java