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 */
018
019package org.apache.hadoop.hbase;
020
021
022/**
023 * A compatibility shim layer for interacting with different versions of Hadoop.
024 */
025//NOTE: we can move this under src/main if main code wants to use this shim layer
026public interface HadoopShims {
027
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   * TaskAttemptId.forName()
033   * @return a concrete TaskAttemptContext instance of o.a.h.mapreduce.TaskAttemptContext
034   */
035  <T,J> T createTestTaskAttemptContext(final J job, final String taskId);
036
037}