001/*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018package org.apache.hadoop.hbase;
019
020import org.apache.hadoop.mapreduce.Job;
021import org.apache.hadoop.mapreduce.TaskAttemptID;
022import org.apache.hadoop.mapreduce.task.TaskAttemptContextImpl;
023
024/**
025 * Compatibility shim layer implementation for Hadoop-2.
026 */
027public class HadoopShimsImpl implements HadoopShims {
028  /**
029   * Returns a TaskAttemptContext instance created from the given parameters.
030   * @param job    an instance of o.a.h.mapreduce.Job
031   * @param taskId an identifier for the task attempt id. Should be parsable by
032   *               {@link TaskAttemptID#forName(String)}
033   * @return a concrete TaskAttemptContext instance of o.a.h.mapreduce.TaskAttemptContext
034   */
035  @Override
036  @SuppressWarnings({ "unchecked", "TypeParameterUnusedInFormals" })
037  public <T, J> T createTestTaskAttemptContext(J job, String taskId) {
038    Job j = (Job) job;
039    return (T) new TaskAttemptContextImpl(j.getConfiguration(), TaskAttemptID.forName(taskId));
040  }
041}