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.hdfs.protocol;
020
021import org.apache.hadoop.classification.InterfaceAudience;
022import org.apache.hadoop.classification.InterfaceStability;
023import org.apache.hadoop.fs.Path;
024
025@InterfaceAudience.Private
026@InterfaceStability.Evolving
027
028/**
029 * Abstract class for deriving exceptions related to filesystem constraints
030 */
031public abstract class FSLimitException extends QuotaExceededException {
032  protected static final long serialVersionUID = 1L;
033
034  protected FSLimitException() {}
035
036  protected FSLimitException(String msg) {
037    super(msg);
038  }
039  
040  protected FSLimitException(long quota, long count) {
041    super(quota, count);
042  }
043
044  /**
045   * Path component length is too long
046   */
047  public static final
048  class PathComponentTooLongException extends FSLimitException {
049    protected static final long serialVersionUID = 1L;
050
051    protected PathComponentTooLongException() {}
052
053    protected PathComponentTooLongException(String msg) {
054      super(msg);
055    }
056    
057    public PathComponentTooLongException(long quota, long count) {
058      super(quota, count);
059    }
060
061    @Override
062    public String getMessage() {
063      Path violator = new Path(pathName);
064      return "The maximum path component name limit of " + violator.getName() +
065      " in directory " + violator.getParent() +
066      " is exceeded: limit=" + quota + " length=" + count; 
067    }
068  }
069
070  /**
071   * Directory has too many items
072   */
073  public static final
074  class MaxDirectoryItemsExceededException extends FSLimitException {
075    protected static final long serialVersionUID = 1L;
076
077    protected MaxDirectoryItemsExceededException() {}
078
079    protected MaxDirectoryItemsExceededException(String msg) {
080      super(msg);
081    }
082    
083    public MaxDirectoryItemsExceededException(long quota, long count) {
084      super(quota, count);
085    }
086
087    @Override
088    public String getMessage() {
089      return "The directory item limit of " + pathName +
090      " is exceeded: limit=" + quota + " items=" + count; 
091    }
092  }
093}