hadoop DelegationTokenIdentifier 源码

2022-10-20
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haddop DelegationTokenIdentifier 代码

文件路径：/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/security/token/delegation/DelegationTokenIdentifier.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.security.token.delegation;

import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceStability;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.security.token.delegation.AbstractDelegationTokenIdentifier;

/**
 * A delegation token identifier that is specific to MapReduce.
 */
@InterfaceAudience.Private
@InterfaceStability.Unstable
public class DelegationTokenIdentifier 
    extends AbstractDelegationTokenIdentifier {
  public static final Text MAPREDUCE_DELEGATION_KIND = 
    new Text("MAPREDUCE_DELEGATION_TOKEN");

  /**
   * Create an empty delegation token identifier for reading into.
   */
  public DelegationTokenIdentifier() {
  }

  /**
   * 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 DelegationTokenIdentifier(Text owner, Text renewer, Text realUser) {
    super(owner, renewer, realUser);
  }

  @Override
  public Text getKind() {
    return MAPREDUCE_DELEGATION_KIND;
  }

}

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