in src/main/java/org/apache/sling/cassandra/resource/provider/util/CassandraResourceProviderUtil.java [113:117]
public static String getrowID(String path) throws NoSuchAlgorithmException, UnsupportedEncodingException {
MessageDigest md = MessageDigest.getInstance("SHA1");
String rowID = new String(Base64.encodeBase64(md.digest(getRemainingPath(path).getBytes("UTF-8"))));
return rowID;
}