hadoop MRDelegationTokenIdentifier 源码
haddop MRDelegationTokenIdentifier 代码
文件路径：/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-common/src/main/java/org/apache/hadoop/mapreduce/v2/api/MRDelegationTokenIdentifier.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.mapreduce.v2.api;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceAudience.Private;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.security.token.Token;
import org.apache.hadoop.security.token.TokenIdentifier;
import org.apache.hadoop.security.token.delegation.AbstractDelegationTokenIdentifier;
/**
* {@link TokenIdentifier} that identifies delegation tokens
* issued by JobHistoryServer to delegate
* MR tasks talking to the JobHistoryServer.
*/
@Private
// TODO Move to a different package.
public class MRDelegationTokenIdentifier extends AbstractDelegationTokenIdentifier {
public static final Text KIND_NAME = new Text("MR_DELEGATION_TOKEN");
public MRDelegationTokenIdentifier() {
}
/**
* Create a new delegation token identifier
* @param owner the effective username of the token owner
* @param renewer the username of the renewer
* @param realUser the real username of the token owner
*/
public MRDelegationTokenIdentifier(Text owner, Text renewer, Text realUser) {
super(owner, renewer, realUser);
}
@Override
public Text getKind() {
return KIND_NAME;
}
@InterfaceAudience.Private
public static class Renewer extends Token.TrivialRenewer {
@Override
protected Text getKind() {
return KIND_NAME;
}
}
}
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