hadoop TrustedChannelResolver 源码
haddop TrustedChannelResolver 代码
文件路径：/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/protocol/datatransfer/TrustedChannelResolver.java
/**
* 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;
}
}
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