| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.hadoop.hdfs.protocol.datatransfer; |
| |
| import java.net.InetAddress; |
| |
| import org.apache.hadoop.conf.Configurable; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.hdfs.client.HdfsClientConfigKeys; |
| import org.apache.hadoop.util.ReflectionUtils; |
| |
| /** |
| * Class used to indicate whether a channel is trusted or not. |
| * The default implementation is to return false indicating that |
| * the channel is not trusted. |
| * This class can be overridden to provide custom logic to determine |
| * whether a channel is trusted or not. |
| * The custom class can be specified via configuration. |
| * |
| */ |
| public class TrustedChannelResolver implements Configurable { |
| Configuration conf; |
| |
| /** |
| * Returns an instance of TrustedChannelResolver. |
| * Looks up the configuration to see if there is custom class specified. |
| * @return TrustedChannelResolver |
| */ |
| public static TrustedChannelResolver getInstance(Configuration conf) { |
| Class<? extends TrustedChannelResolver> clazz = |
| conf.getClass( |
| HdfsClientConfigKeys.DFS_TRUSTEDCHANNEL_RESOLVER_CLASS, |
| TrustedChannelResolver.class, TrustedChannelResolver.class); |
| return ReflectionUtils.newInstance(clazz, conf); |
| } |
| |
| @Override |
| public void setConf(Configuration conf) { |
| this.conf = conf; |
| } |
| |
| @Override |
| public Configuration getConf() { |
| return conf; |
| } |
| |
| /** |
| * Return boolean value indicating whether a channel is trusted or not |
| * from a client's perspective. |
| * @return true if the channel is trusted and false otherwise. |
| */ |
| public boolean isTrusted() { |
| return false; |
| } |
| |
| |
| /** |
| * Identify boolean value indicating whether a channel is trusted or not. |
| * @param peerAddress address of the peer |
| * @return true if the channel is trusted and false otherwise. |
| */ |
| public boolean isTrusted(InetAddress peerAddress) { |
| return false; |
| } |
| } |