| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 at |
| * |
| * 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 org.apache.hadoop.tools; |
| |
| import org.apache.hadoop.mapreduce.*; |
| import org.apache.hadoop.mapreduce.task.MapContextImpl; |
| import org.apache.hadoop.mapreduce.lib.map.WrappedMapper; |
| import org.apache.hadoop.mapreduce.lib.input.FileInputFormat; |
| import org.apache.hadoop.io.Text; |
| import org.apache.hadoop.fs.FileStatus; |
| import org.apache.hadoop.conf.Configuration; |
| |
| import java.util.List; |
| import java.util.ArrayList; |
| import java.io.IOException; |
| |
| public class StubContext { |
| |
| private StubStatusReporter reporter = new StubStatusReporter(); |
| private RecordReader<Text, FileStatus> reader; |
| private StubInMemoryWriter writer = new StubInMemoryWriter(); |
| private Mapper<Text, FileStatus, Text, Text>.Context mapperContext; |
| |
| public StubContext(Configuration conf, RecordReader<Text, FileStatus> reader, |
| int taskId) throws IOException, InterruptedException { |
| |
| WrappedMapper<Text, FileStatus, Text, Text> wrappedMapper |
| = new WrappedMapper<Text, FileStatus, Text, Text>(); |
| |
| MapContextImpl<Text, FileStatus, Text, Text> contextImpl |
| = new MapContextImpl<Text, FileStatus, Text, Text>(conf, |
| getTaskAttemptID(taskId), reader, writer, |
| null, reporter, null); |
| |
| this.reader = reader; |
| this.mapperContext = wrappedMapper.getMapContext(contextImpl); |
| } |
| |
| public Mapper<Text, FileStatus, Text, Text>.Context getContext() { |
| return mapperContext; |
| } |
| |
| public StatusReporter getReporter() { |
| return reporter; |
| } |
| |
| public RecordReader<Text, FileStatus> getReader() { |
| return reader; |
| } |
| |
| public StubInMemoryWriter getWriter() { |
| return writer; |
| } |
| |
| public static class StubStatusReporter extends StatusReporter { |
| |
| private Counters counters = new Counters(); |
| |
| public StubStatusReporter() { |
| /* |
| final CounterGroup counterGroup |
| = new CounterGroup("FileInputFormatCounters", |
| "FileInputFormatCounters"); |
| counterGroup.addCounter(new Counter("BYTES_READ", |
| "BYTES_READ", |
| 0)); |
| counters.addGroup(counterGroup); |
| */ |
| } |
| |
| @Override |
| public Counter getCounter(Enum<?> name) { |
| return counters.findCounter(name); |
| } |
| |
| @Override |
| public Counter getCounter(String group, String name) { |
| return counters.findCounter(group, name); |
| } |
| |
| @Override |
| public void progress() {} |
| |
| @Override |
| public float getProgress() { |
| return 0F; |
| } |
| |
| @Override |
| public void setStatus(String status) {} |
| } |
| |
| |
| public static class StubInMemoryWriter extends RecordWriter<Text, Text> { |
| |
| List<Text> keys = new ArrayList<Text>(); |
| |
| List<Text> values = new ArrayList<Text>(); |
| |
| @Override |
| public void write(Text key, Text value) throws IOException, InterruptedException { |
| keys.add(key); |
| values.add(value); |
| } |
| |
| @Override |
| public void close(TaskAttemptContext context) throws IOException, InterruptedException { |
| } |
| |
| public List<Text> keys() { |
| return keys; |
| } |
| |
| public List<Text> values() { |
| return values; |
| } |
| |
| } |
| |
| public static TaskAttemptID getTaskAttemptID(int taskId) { |
| return new TaskAttemptID("", 0, TaskType.MAP, taskId, 0); |
| } |
| } |