Java tutorial
/* * Copyright 2009-2013 by The Regents of the University of California * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * you may obtain a copy of the License from * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package edu.uci.ics.hyracks.hdfs; import org.apache.hadoop.conf.Configuration; import org.apache.hadoop.mapreduce.JobContext; import org.apache.hadoop.mapreduce.JobID; import org.apache.hadoop.mapreduce.TaskAttemptContext; import org.apache.hadoop.mapreduce.TaskAttemptID; import org.apache.hadoop.mapreduce.TaskType; import org.apache.hadoop.mapreduce.task.JobContextImpl; import org.apache.hadoop.mapreduce.task.TaskAttemptContextImpl; import edu.uci.ics.hyracks.api.exceptions.HyracksDataException; /** * The wrapper to generate TaskTattemptContext */ public class ContextFactory { public TaskAttemptContext createContext(Configuration conf, TaskAttemptID tid) throws HyracksDataException { try { return new TaskAttemptContextImpl(conf, tid); } catch (Exception e) { throw new HyracksDataException(e); } } public TaskAttemptContext createContext(Configuration conf, int partition) throws HyracksDataException { try { TaskAttemptID tid = new TaskAttemptID("", 0, TaskType.REDUCE, partition, 0); return new TaskAttemptContextImpl(conf, tid); } catch (Exception e) { throw new HyracksDataException(e); } } public JobContext createJobContext(Configuration conf) { return new JobContextImpl(conf, new JobID("0", 0)); } }