View Javadoc

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  
26  import org.apache.hadoop.conf.Configuration;
27  import org.apache.hadoop.fs.Path;
28  import org.apache.hadoop.mapred.JobClient;
29  import org.apache.hadoop.mapred.JobConf;
30  import org.apache.hadoop.mapreduce.JobSubmissionFiles;
31  import org.apache.hadoop.hbase.classification.InterfaceAudience;
32  import org.apache.hadoop.hbase.classification.InterfaceStability;
33  /**
34   * Utility methods to interact with a job.
35   */
36  @InterfaceAudience.Private
37  @InterfaceStability.Evolving
38  public abstract class JobUtil {
39    private static final Log LOG = LogFactory.getLog(JobUtil.class);
40  
41    protected JobUtil() {
42      super();
43    }
44  
45    /**
46     * Initializes the staging directory and returns the path.
47     *
48     * @param conf system configuration
49     * @return staging directory path
50     * @throws IOException
51     * @throws InterruptedException
52     */
53    public static Path getStagingDir(Configuration conf)
54        throws IOException, InterruptedException {
55      JobClient jobClient = new JobClient(new JobConf(conf));
56      return JobSubmissionFiles.getStagingDir(jobClient, conf);
57    }
58  }