branch-0.23.1/hadoop-mapreduce-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/security/client/RMDelegationTokenIdentifier.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.yarn.security.client;


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

/**
 * Delegation Token Identifier that identifies the delegation tokens from the 
 * Resource Manager. 
 */
@Public
@Evolving
public class RMDelegationTokenIdentifier extends AbstractDelegationTokenIdentifier {

  public static final Text KIND_NAME = new Text("RM_DELEGATION_TOKEN");
  
  public RMDelegationTokenIdentifier() {
  }
  
  /**
   * 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 RMDelegationTokenIdentifier(Text owner, Text renewer, Text realUser) {
    super(owner, renewer, realUser);
  }

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