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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;
20  
21  import org.apache.hadoop.mapreduce.Job;
22  import org.apache.hadoop.mapreduce.TaskAttemptID;
23  import org.apache.hadoop.mapreduce.task.TaskAttemptContextImpl;
24  
25  /**
26   * Compatibility shim layer implementation for Hadoop-2.
27   */
28  public class HadoopShimsImpl implements HadoopShims {
29  
30    /**
31     * Returns a TaskAttemptContext instance created from the given parameters.
32     * @param job an instance of o.a.h.mapreduce.Job
33     * @param taskId an identifier for the task attempt id. Should be parsable by
34     * TaskAttemptId.forName()
35     * @return a concrete TaskAttemptContext instance of o.a.h.mapreduce.TaskAttemptContext
36     */
37    @Override
38    @SuppressWarnings("unchecked")
39    public <T, J> T createTestTaskAttemptContext(J job, String taskId) {
40      Job j = (Job)job;
41      return (T)new TaskAttemptContextImpl(j.getConfiguration(), TaskAttemptID.forName(taskId));
42    }
43  }