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 */ 018 019package org.apache.hadoop.service; 020 021import org.apache.hadoop.classification.InterfaceAudience.Public; 022import org.apache.hadoop.classification.InterfaceStability.Evolving; 023 024/** 025 * Exception that is raised on state change operations. 026 */ 027@Public 028@Evolving 029public class ServiceStateException extends RuntimeException { 030 031 private static final long serialVersionUID = 1110000352259232646L; 032 033 public ServiceStateException(String message) { 034 super(message); 035 } 036 037 public ServiceStateException(String message, Throwable cause) { 038 super(message, cause); 039 } 040 041 public ServiceStateException(Throwable cause) { 042 super(cause); 043 } 044 045 /** 046 * Convert any exception into a {@link RuntimeException}. 047 * If the caught exception is already of that type, it is typecast to a 048 * {@link RuntimeException} and returned. 049 * 050 * All other exception types are wrapped in a new instance of 051 * ServiceStateException 052 * @param fault exception or throwable 053 * @return a ServiceStateException to rethrow 054 */ 055 public static RuntimeException convert(Throwable fault) { 056 if (fault instanceof RuntimeException) { 057 return (RuntimeException) fault; 058 } else { 059 return new ServiceStateException(fault); 060 } 061 } 062 063 /** 064 * Convert any exception into a {@link RuntimeException}. 065 * If the caught exception is already of that type, it is typecast to a 066 * {@link RuntimeException} and returned. 067 * 068 * All other exception types are wrapped in a new instance of 069 * ServiceStateException 070 * @param text text to use if a new exception is created 071 * @param fault exception or throwable 072 * @return a ServiceStateException to rethrow 073 */ 074 public static RuntimeException convert(String text, Throwable fault) { 075 if (fault instanceof RuntimeException) { 076 return (RuntimeException) fault; 077 } else { 078 return new ServiceStateException(text, fault); 079 } 080 } 081}