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.util;
019    
020    import org.apache.commons.logging.Log;
021    import org.apache.commons.logging.LogFactory;
022    
023    public class CombinedIPWhiteList implements IPList {
024    
025      public static final Log LOG = LogFactory.getLog(CombinedIPWhiteList.class);
026      private static final String LOCALHOST_IP = "127.0.0.1";
027    
028      private final IPList[] networkLists;
029    
030      public CombinedIPWhiteList(String fixedWhiteListFile,
031          String variableWhiteListFile, long cacheExpiryInSeconds) {
032    
033        IPList fixedNetworkList = new FileBasedIPList(fixedWhiteListFile);
034        if (variableWhiteListFile != null){
035          IPList variableNetworkList = new CacheableIPList(
036              new FileBasedIPList(variableWhiteListFile),cacheExpiryInSeconds);
037          networkLists = new IPList[] {fixedNetworkList, variableNetworkList};
038        }
039        else {
040          networkLists = new IPList[] {fixedNetworkList};
041        }
042      }
043      @Override
044      public boolean isIn(String ipAddress) {
045        if (ipAddress == null) {
046          throw new IllegalArgumentException("ipAddress is null");
047        }
048    
049        if (LOCALHOST_IP.equals(ipAddress)) {
050          return true;
051        }
052    
053        for (IPList networkList:networkLists) {
054          if (networkList.isIn(ipAddress)) {
055            return true;
056          }
057        }
058        return false;
059      }
060    }