org.apache.hadoop.mapreduce.security.token.JobTokenIdentifier.java Source code

Introduction

Here is the source code for org.apache.hadoop.mapreduce.security.token.JobTokenIdentifier.java

Source

/**
 * 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;

import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;

import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceStability;
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.UserGroupInformation;

/**
 * The token identifier for job token
 */
@InterfaceAudience.Private
@InterfaceStability.Unstable
public class JobTokenIdentifier extends TokenIdentifier {
    private Text jobid;
    public final static Text KIND_NAME = new Text("mapreduce.job");

    /**
     * Default constructor
     */
    public JobTokenIdentifier() {
        this.jobid = new Text();
    }

    /**
     * Create a job token identifier from a jobid
     * @param jobid the jobid to use
     */
    public JobTokenIdentifier(Text jobid) {
        this.jobid = jobid;
    }

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

    /** {@inheritDoc} */
    @Override
    public UserGroupInformation getUser() {
        if (jobid == null || "".equals(jobid.toString())) {
            return null;
        }
        return UserGroupInformation.createRemoteUser(jobid.toString());
    }

    /**
     * Get the jobid
     * @return the jobid
     */
    public Text getJobId() {
        return jobid;
    }

    /** {@inheritDoc} */
    @Override
    public void readFields(DataInput in) throws IOException {
        jobid.readFields(in);
    }

    /** {@inheritDoc} */
    @Override
    public void write(DataOutput out) throws IOException {
        jobid.write(out);
    }

    @InterfaceAudience.Private
    public static class Renewer extends Token.TrivialRenewer {
        @Override
        protected Text getKind() {
            return KIND_NAME;
        }
    }
}