001/* 002 * Licensed to the Apache Software Foundation (ASF) under one 003 * or more contributor license agreements. See the NOTICE file 004 * distributed with this work for additional information 005 * regarding copyright ownership. The ASF licenses this file 006 * to you under the Apache License, Version 2.0 (the 007 * "License"); you may not use this file except in compliance 008 * with the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, software 013 * distributed under the License is distributed on an "AS IS" BASIS, 014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 015 * See the License for the specific language governing permissions and 016 * limitations under the License. 017 */ 018package org.apache.hadoop.service; 019 020import java.io.Serializable; 021 022import org.apache.hadoop.classification.InterfaceAudience.Public; 023import org.apache.hadoop.classification.InterfaceStability.Evolving; 024 025/** 026 * A serializable lifecycle event: the time a state 027 * transition occurred, and what state was entered. 028 */ 029@Public 030@Evolving 031public class LifecycleEvent implements Serializable { 032 033 private static final long serialVersionUID = 1648576996238247836L; 034 035 /** 036 * Local time in milliseconds when the event occurred 037 */ 038 public long time; 039 /** 040 * new state 041 */ 042 public Service.STATE state; 043}