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    package org.apache.hadoop.hdfs.server.protocol;
019    
020    /**
021     * Class captures information of a storage in Datanode.
022     */
023    public class DatanodeStorage {
024      /** The state of the storage. */
025      public enum State {
026        NORMAL,
027        READ_ONLY
028      }
029      
030      private final String storageID;
031      private final State state;
032    
033      /**
034       * Create a storage with {@link State#NORMAL}.
035       * @param storageID
036       */
037      public DatanodeStorage(String storageID) {
038        this(storageID, State.NORMAL);
039      }
040    
041      public DatanodeStorage(String sid, State s) {
042        storageID = sid;
043        state = s;
044      }
045    
046      public String getStorageID() {
047        return storageID;
048      }
049    
050      public State getState() {
051        return state;
052      }
053    }