| /** |
| * 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.hadoop.hdfs.server.namenode.startupprogress; |
| |
| import org.apache.hadoop.classification.InterfaceAudience; |
| |
| /** |
| * Abstract base of internal data structures used for tracking progress. For |
| * primitive long properties, {@link Long#MIN_VALUE} is used as a sentinel value |
| * to indicate that the property is undefined. |
| */ |
| @InterfaceAudience.Private |
| abstract class AbstractTracking implements Cloneable { |
| long beginTime = Long.MIN_VALUE; |
| long endTime = Long.MIN_VALUE; |
| |
| /** |
| * Subclass instances may call this method during cloning to copy the values of |
| * all properties stored in this base class. |
| * |
| * @param dest AbstractTracking destination for copying properties |
| */ |
| protected void copy(AbstractTracking dest) { |
| dest.beginTime = beginTime; |
| dest.endTime = endTime; |
| } |
| } |