| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| * |
| */ |
| package org.apache.directory.mitosis.common; |
| |
| |
| import java.io.Serializable; |
| |
| |
| /** |
| * Represents 'Change Sequence Number' in LDUP specification. |
| * |
| * A CSN is a composition of a timestamp, a replica ID and a |
| * operation sequence number. |
| * |
| * It distinguishes a change made on an object on a server, |
| * and if two operations take place during the same timeStamp, |
| * the operation sequence number makes those operations distinct. |
| * |
| * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> |
| */ |
| public interface CSN extends Serializable, Comparable |
| { |
| /** |
| * Returns GMT timestamp of modification. |
| */ |
| long getTimestamp(); |
| |
| |
| /** |
| * Returns replica ID. |
| */ |
| ReplicaId getReplicaId(); |
| |
| |
| /** |
| * Returns sequence number of modification. |
| */ |
| int getOperationSequence(); |
| |
| |
| /** |
| * Returns octet-string representation of this CSN. |
| */ |
| String toOctetString(); |
| |
| |
| /** |
| * Returns a byte array representing the CSN |
| */ |
| byte[] toBytes(); |
| } |