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.security; 020 021import java.io.IOException; 022import java.util.List; 023 024import org.apache.commons.logging.Log; 025import org.apache.commons.logging.LogFactory; 026import org.apache.hadoop.util.NativeCodeLoader; 027 028public class JniBasedUnixGroupsNetgroupMappingWithFallback implements 029 GroupMappingServiceProvider { 030 031 private static final Log LOG = LogFactory 032 .getLog(JniBasedUnixGroupsNetgroupMappingWithFallback.class); 033 034 private GroupMappingServiceProvider impl; 035 036 public JniBasedUnixGroupsNetgroupMappingWithFallback() { 037 if (NativeCodeLoader.isNativeCodeLoaded()) { 038 this.impl = new JniBasedUnixGroupsNetgroupMapping(); 039 } else { 040 LOG.info("Falling back to shell based"); 041 this.impl = new ShellBasedUnixGroupsNetgroupMapping(); 042 } 043 if (LOG.isDebugEnabled()) { 044 LOG.debug("Group mapping impl=" + impl.getClass().getName()); 045 } 046 } 047 048 @Override 049 public List<String> getGroups(String user) throws IOException { 050 return impl.getGroups(user); 051 } 052 053 @Override 054 public void cacheGroupsRefresh() throws IOException { 055 impl.cacheGroupsRefresh(); 056 } 057 058 @Override 059 public void cacheGroupsAdd(List<String> groups) throws IOException { 060 impl.cacheGroupsAdd(groups); 061 } 062 063}