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1   /**
2    *
3    * Licensed to the Apache Software Foundation (ASF) under one
4    * or more contributor license agreements.  See the NOTICE file
5    * distributed with this work for additional information
6    * regarding copyright ownership.  The ASF licenses this file
7    * to you under the Apache License, Version 2.0 (the
8    * "License"); you may not use this file except in compliance
9    * with the License.  You may obtain a copy of the License at
10   *
11   *     http://www.apache.org/licenses/LICENSE-2.0
12   *
13   * Unless required by applicable law or agreed to in writing, software
14   * distributed under the License is distributed on an "AS IS" BASIS,
15   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16   * See the License for the specific language governing permissions and
17   * limitations under the License.
18   */
19  package org.apache.hadoop.hbase.mapred;
20  
21  import org.apache.hadoop.hbase.classification.InterfaceAudience;
22  import org.apache.hadoop.hbase.classification.InterfaceStability;
23  import org.apache.hadoop.util.ProgramDriver;
24  import com.google.common.annotations.VisibleForTesting;
25  
26  /**
27   * Driver for hbase mapreduce jobs. Select which to run by passing name of job
28   * to this main.
29   */
30  @InterfaceAudience.Public
31  @InterfaceStability.Stable
32  public class Driver {
33  
34    private static ProgramDriver pgd = new ProgramDriver();
35  
36    @VisibleForTesting
37    static void setProgramDriver(ProgramDriver pgd0) {    
38      pgd = pgd0;
39    }
40  
41    /**
42     * @param args
43     * @throws Throwable
44     */
45    public static void main(String[] args) throws Throwable {
46      pgd.addClass(RowCounter.NAME, RowCounter.class, "Count rows in HBase table");
47      ProgramDriver.class.getMethod("driver", new Class[] { String[].class })
48          .invoke(pgd, new Object[] { args });    
49    }
50  }