| /** |
| * 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 |
| * <p/> |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * <p/> |
| * 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.diskbalancer; |
| |
| import java.io.IOException; |
| |
| /** |
| * Disk Balancer Exceptions. |
| */ |
| public class DiskBalancerException extends IOException { |
| /** |
| * Results returned by the RPC layer of DiskBalancer. |
| */ |
| public enum Result { |
| DISK_BALANCER_NOT_ENABLED, |
| INVALID_PLAN_VERSION, |
| INVALID_PLAN, |
| INVALID_PLAN_HASH, |
| OLD_PLAN_SUBMITTED, |
| DATANODE_ID_MISMATCH, |
| MALFORMED_PLAN, |
| PLAN_ALREADY_IN_PROGRESS, |
| INVALID_VOLUME, |
| INVALID_MOVE, |
| INTERNAL_ERROR, |
| NO_SUCH_PLAN, |
| UNKNOWN_KEY, |
| INVALID_NODE, |
| DATANODE_STATUS_NOT_REGULAR, |
| INVALID_HOST_FILE_PATH, |
| } |
| |
| private final Result result; |
| |
| /** |
| * Constructs an {@code IOException} with the specified detail message. |
| * |
| * @param message The detail message (which is saved for later retrieval by |
| * the {@link #getMessage()} method) |
| */ |
| public DiskBalancerException(String message, Result result) { |
| super(message); |
| this.result = result; |
| } |
| |
| /** |
| * Constructs an {@code IOException} with the specified detail message and |
| * cause. |
| * <p> Note that the detail message associated with {@code cause} is |
| * <i>not</i> |
| * automatically incorporated into this exception's detail message. |
| * |
| * @param message The detail message (which is saved for later retrieval by |
| * the |
| * {@link #getMessage()} method) |
| * @param cause The cause (which is saved for later retrieval by the {@link |
| * #getCause()} method). (A null value is permitted, and |
| * indicates that the cause is nonexistent or unknown.) |
| */ |
| public DiskBalancerException(String message, Throwable cause, Result result) { |
| super(message, cause); |
| this.result = result; |
| } |
| |
| /** |
| * Constructs an {@code IOException} with the specified cause and a detail |
| * message of {@code (cause==null ? null : cause.toString())} (which typically |
| * contains the class and detail message of {@code cause}). This |
| * constructor is useful for IO exceptions that are little more than |
| * wrappers for other throwables. |
| * |
| * @param cause The cause (which is saved for later retrieval by the {@link |
| * #getCause()} method). (A null value is permitted, and |
| * indicates |
| * that the cause is nonexistent or unknown.) |
| */ |
| public DiskBalancerException(Throwable cause, Result result) { |
| super(cause); |
| this.result = result; |
| } |
| |
| /** |
| * Returns the result. |
| * @return int |
| */ |
| public Result getResult() { |
| return result; |
| } |
| } |