org.apache.hadoop.conf.ReconfigurationException Maven / Gradle / Ivy
/**
* 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;
}
}