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 */
018package org.apache.hadoop.util;
019
020import org.apache.commons.logging.Log;
021import org.apache.commons.logging.LogFactory;
022
023public 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}