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    
019    package org.apache.hadoop.hdfs.protocol;
020    
021    import org.apache.hadoop.classification.InterfaceAudience;
022    import org.apache.hadoop.classification.InterfaceStability;
023    import 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     */
031    public 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    }