| /** |
| * 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.conf; |
| |
| |
| /** |
| * Exception indicating that configuration property cannot be changed |
| * at run time. |
| */ |
| public class ReconfigurationException extends Exception { |
| |
| private static final long serialVersionUID = 1L; |
| |
| private String property; |
| private String newVal; |
| private String oldVal; |
| |
| /** |
| * Construct the exception message. |
| */ |
| private static String constructMessage(String property, |
| String newVal, String oldVal) { |
| String message = "Could not change property " + property; |
| if (oldVal != null) { |
| message += " from \'" + oldVal; |
| } |
| if (newVal != null) { |
| message += "\' to \'" + newVal + "\'"; |
| } |
| return message; |
| } |
| |
| |
| /** |
| * Create a new instance of {@link ReconfigurationException}. |
| */ |
| public ReconfigurationException() { |
| super("Could not change configuration."); |
| this.property = null; |
| this.newVal = null; |
| this.oldVal = null; |
| } |
| |
| /** |
| * Create a new instance of {@link ReconfigurationException}. |
| */ |
| public ReconfigurationException(String property, |
| String newVal, String oldVal, |
| Throwable cause) { |
| super(constructMessage(property, newVal, oldVal), cause); |
| this.property = property; |
| this.newVal = newVal; |
| this.oldVal = oldVal; |
| } |
| |
| /** |
| * Create a new instance of {@link ReconfigurationException}. |
| */ |
| public ReconfigurationException(String property, |
| String newVal, String oldVal) { |
| super(constructMessage(property, newVal, oldVal)); |
| this.property = property; |
| this.newVal = newVal; |
| this.oldVal = oldVal; |
| } |
| |
| /** |
| * Get property that cannot be changed. |
| */ |
| public String getProperty() { |
| return property; |
| } |
| |
| /** |
| * Get value to which property was supposed to be changed. |
| */ |
| public String getNewValue() { |
| return newVal; |
| } |
| |
| /** |
| * Get old value of property that cannot be changed. |
| */ |
| public String getOldValue() { |
| return oldVal; |
| } |
| |
| } |