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1   /**
2    * Licensed to the Apache Software Foundation (ASF) under one
3    * or more contributor license agreements.  See the NOTICE file
4    * distributed with this work for additional information
5    * regarding copyright ownership.  The ASF licenses this file
6    * to you under the Apache License, Version 2.0 (the
7    * "License"); you may not use this file except in compliance
8    * with the License.  You may obtain a copy of the License at
9    *
10   *     http://www.apache.org/licenses/LICENSE-2.0
11   *
12   * Unless required by applicable law or agreed to in writing, software
13   * distributed under the License is distributed on an "AS IS" BASIS,
14   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15   * See the License for the specific language governing permissions and
16   * limitations under the License.
17   */
18  
19  package org.apache.hadoop.hbase.mapreduce;
20  
21  import java.io.IOException;
22  
23  import org.apache.commons.logging.Log;
24  import org.apache.commons.logging.LogFactory;
25  import org.apache.hadoop.classification.InterfaceAudience;
26  import org.apache.hadoop.classification.InterfaceStability;
27  import org.apache.hadoop.fs.Path;
28  import org.apache.hadoop.conf.Configuration;
29  import org.apache.hadoop.mapreduce.Cluster;
30  import org.apache.hadoop.mapreduce.JobSubmissionFiles;
31  
32  /**
33   * Utility methods to interact with a job.
34   */
35  @InterfaceAudience.Private
36  @InterfaceStability.Evolving
37  public abstract class JobUtil {
38    private static final Log LOG = LogFactory.getLog(JobUtil.class);
39  
40    protected JobUtil() {
41      super();
42    }
43  
44    /**
45     * Initializes the staging directory and returns the path.
46     *
47     * @param conf system configuration
48     * @return staging directory path
49     * @throws IOException
50     * @throws InterruptedException
51     */
52    public static Path getStagingDir(Configuration conf)
53        throws IOException, InterruptedException {
54      return JobSubmissionFiles.getStagingDir(new Cluster(conf), conf);
55    }
56  }