org.apache.hadoop.mapred.JobInfo.java Source code

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Here is the source code for org.apache.hadoop.mapred.JobInfo.java

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/**
 * 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.mapred;

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

import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.io.Writable;
import org.apache.hadoop.io.WritableUtils;

/**
 * Represents the basic information that is saved per a job when the 
 * JobTracker receives a submitJob request. The information is saved
 * so that the JobTracker can recover incomplete jobs upon restart.
 */
class JobInfo implements Writable {
    private org.apache.hadoop.mapreduce.JobID id;
    private Text user;
    private Path jobSubmitDir;

    public JobInfo() {
    }

    public JobInfo(org.apache.hadoop.mapreduce.JobID id, Text user, Path jobSubmitDir) {
        this.id = id;
        this.user = user;
        this.jobSubmitDir = jobSubmitDir;
    }

    /**
     * Get the job id.
     */
    public org.apache.hadoop.mapreduce.JobID getJobID() {
        return id;
    }

    /**
     * Get the configured job's user-name.
     */
    public Text getUser() {
        return user;
    }

    /**
     * Get the job submission directory
     */
    public Path getJobSubmitDir() {
        return this.jobSubmitDir;
    }

    public void readFields(DataInput in) throws IOException {
        id = new org.apache.hadoop.mapreduce.JobID();
        id.readFields(in);
        user = new Text();
        user.readFields(in);
        jobSubmitDir = new Path(WritableUtils.readString(in));
    }

    public void write(DataOutput out) throws IOException {
        id.write(out);
        user.write(out);
        WritableUtils.writeString(out, jobSubmitDir.toString());
    }
}