Java 类org.apache.hadoop.mapreduce.task.MapContextImpl 实例源码

项目：hadoop-on-lustre2 文件：TestFixedLengthInputFormat.java

private static List<String> readSplit(FixedLengthInputFormat format, 
                                      InputSplit split, 
                                      Job job) throws Exception {
  List<String> result = new ArrayList<String>();
  TaskAttemptContext context = MapReduceTestUtil.
      createDummyMapTaskAttemptContext(job.getConfiguration());
  RecordReader<LongWritable, BytesWritable> reader =
      format.createRecordReader(split, context);
  MapContext<LongWritable, BytesWritable, LongWritable, BytesWritable>
      mcontext =
      new MapContextImpl<LongWritable, BytesWritable, LongWritable,
      BytesWritable>(job.getConfiguration(), context.getTaskAttemptID(),
      reader, null, null, MapReduceTestUtil.createDummyReporter(), split);
  reader.initialize(split, mcontext);
  LongWritable key;
  BytesWritable value;
  while (reader.nextKeyValue()) {
    key = reader.getCurrentKey();
    value = reader.getCurrentValue();
    result.add(new String(value.getBytes(), 0, value.getLength()));
  }
  reader.close();
  return result;
}

项目：hadoop 文件：TestMRKeyValueTextInputFormat.java

private static List<Text> readSplit(KeyValueTextInputFormat format, 
    InputSplit split, Job job) throws IOException, InterruptedException {
  List<Text> result = new ArrayList<Text>();
  Configuration conf = job.getConfiguration();
  TaskAttemptContext context = MapReduceTestUtil.
    createDummyMapTaskAttemptContext(conf);
  RecordReader<Text, Text> reader = format.createRecordReader(split, 
    MapReduceTestUtil.createDummyMapTaskAttemptContext(conf));
  MapContext<Text, Text, Text, Text> mcontext = 
    new MapContextImpl<Text, Text, Text, Text>(conf, 
    context.getTaskAttemptID(), reader, null, null,
    MapReduceTestUtil.createDummyReporter(), 
    split);
  reader.initialize(split, mcontext);
  while (reader.nextKeyValue()) {
    result.add(new Text(reader.getCurrentValue()));
  }
  reader.close();
  return result;
}

项目：hadoop 文件：TestCombineTextInputFormat.java

private static List<Text> readSplit(InputFormat<LongWritable,Text> format,
  InputSplit split, Job job) throws IOException, InterruptedException {
  List<Text> result = new ArrayList<Text>();
  Configuration conf = job.getConfiguration();
  TaskAttemptContext context = MapReduceTestUtil.
    createDummyMapTaskAttemptContext(conf);
  RecordReader<LongWritable, Text> reader = format.createRecordReader(split,
    MapReduceTestUtil.createDummyMapTaskAttemptContext(conf));
  MapContext<LongWritable,Text,LongWritable,Text> mcontext =
    new MapContextImpl<LongWritable,Text,LongWritable,Text>(conf,
    context.getTaskAttemptID(), reader, null, null,
    MapReduceTestUtil.createDummyReporter(),
    split);
  reader.initialize(split, mcontext);
  while (reader.nextKeyValue()) {
    result.add(new Text(reader.getCurrentValue()));
  }
  return result;
}

项目：aliyun-oss-hadoop-fs 文件：TestMRKeyValueTextInputFormat.java

private static List<Text> readSplit(KeyValueTextInputFormat format, 
    InputSplit split, Job job) throws IOException, InterruptedException {
  List<Text> result = new ArrayList<Text>();
  Configuration conf = job.getConfiguration();
  TaskAttemptContext context = MapReduceTestUtil.
    createDummyMapTaskAttemptContext(conf);
  RecordReader<Text, Text> reader = format.createRecordReader(split, 
    MapReduceTestUtil.createDummyMapTaskAttemptContext(conf));
  MapContext<Text, Text, Text, Text> mcontext = 
    new MapContextImpl<Text, Text, Text, Text>(conf, 
    context.getTaskAttemptID(), reader, null, null,
    MapReduceTestUtil.createDummyReporter(), 
    split);
  reader.initialize(split, mcontext);
  while (reader.nextKeyValue()) {
    result.add(new Text(reader.getCurrentValue()));
  }
  reader.close();
  return result;
}

项目：aliyun-oss-hadoop-fs 文件：TestCombineTextInputFormat.java

private static List<Text> readSplit(InputFormat<LongWritable,Text> format,
  InputSplit split, Job job) throws IOException, InterruptedException {
  List<Text> result = new ArrayList<Text>();
  Configuration conf = job.getConfiguration();
  TaskAttemptContext context = MapReduceTestUtil.
    createDummyMapTaskAttemptContext(conf);
  RecordReader<LongWritable, Text> reader = format.createRecordReader(split,
    MapReduceTestUtil.createDummyMapTaskAttemptContext(conf));
  MapContext<LongWritable,Text,LongWritable,Text> mcontext =
    new MapContextImpl<LongWritable,Text,LongWritable,Text>(conf,
    context.getTaskAttemptID(), reader, null, null,
    MapReduceTestUtil.createDummyReporter(),
    split);
  reader.initialize(split, mcontext);
  while (reader.nextKeyValue()) {
    result.add(new Text(reader.getCurrentValue()));
  }
  return result;
}

项目：big-c 文件：TestMRKeyValueTextInputFormat.java

private static List<Text> readSplit(KeyValueTextInputFormat format, 
    InputSplit split, Job job) throws IOException, InterruptedException {
  List<Text> result = new ArrayList<Text>();
  Configuration conf = job.getConfiguration();
  TaskAttemptContext context = MapReduceTestUtil.
    createDummyMapTaskAttemptContext(conf);
  RecordReader<Text, Text> reader = format.createRecordReader(split, 
    MapReduceTestUtil.createDummyMapTaskAttemptContext(conf));
  MapContext<Text, Text, Text, Text> mcontext = 
    new MapContextImpl<Text, Text, Text, Text>(conf, 
    context.getTaskAttemptID(), reader, null, null,
    MapReduceTestUtil.createDummyReporter(), 
    split);
  reader.initialize(split, mcontext);
  while (reader.nextKeyValue()) {
    result.add(new Text(reader.getCurrentValue()));
  }
  reader.close();
  return result;
}

项目：big-c 文件：TestCombineTextInputFormat.java

private static List<Text> readSplit(InputFormat<LongWritable,Text> format,
  InputSplit split, Job job) throws IOException, InterruptedException {
  List<Text> result = new ArrayList<Text>();
  Configuration conf = job.getConfiguration();
  TaskAttemptContext context = MapReduceTestUtil.
    createDummyMapTaskAttemptContext(conf);
  RecordReader<LongWritable, Text> reader = format.createRecordReader(split,
    MapReduceTestUtil.createDummyMapTaskAttemptContext(conf));
  MapContext<LongWritable,Text,LongWritable,Text> mcontext =
    new MapContextImpl<LongWritable,Text,LongWritable,Text>(conf,
    context.getTaskAttemptID(), reader, null, null,
    MapReduceTestUtil.createDummyReporter(),
    split);
  reader.initialize(split, mcontext);
  while (reader.nextKeyValue()) {
    result.add(new Text(reader.getCurrentValue()));
  }
  return result;
}

项目：big-c 文件：TestGridMixClasses.java

@SuppressWarnings({"rawtypes", "unchecked"})
@Test (timeout=10000)
public void testLoadMapper() throws Exception {

  Configuration conf = new Configuration();
  conf.setInt(JobContext.NUM_REDUCES, 2);

  CompressionEmulationUtil.setCompressionEmulationEnabled(conf, true);
  conf.setBoolean(MRJobConfig.MAP_OUTPUT_COMPRESS, true);

  TaskAttemptID taskId = new TaskAttemptID();
  RecordReader<NullWritable, GridmixRecord> reader = new FakeRecordReader();

  LoadRecordGkGrWriter writer = new LoadRecordGkGrWriter();

  OutputCommitter committer = new CustomOutputCommitter();
  StatusReporter reporter = new TaskAttemptContextImpl.DummyReporter();
  LoadSplit split = getLoadSplit();

  MapContext<NullWritable, GridmixRecord, GridmixKey, GridmixRecord> mapContext = new MapContextImpl<NullWritable, GridmixRecord, GridmixKey, GridmixRecord>(
          conf, taskId, reader, writer, committer, reporter, split);
  // context
  Context ctx = new WrappedMapper<NullWritable, GridmixRecord, GridmixKey, GridmixRecord>()
          .getMapContext(mapContext);

  reader.initialize(split, ctx);
  ctx.getConfiguration().setBoolean(MRJobConfig.MAP_OUTPUT_COMPRESS, true);
  CompressionEmulationUtil.setCompressionEmulationEnabled(
          ctx.getConfiguration(), true);

  LoadJob.LoadMapper mapper = new LoadJob.LoadMapper();
  // setup, map, clean
  mapper.run(ctx);

  Map<GridmixKey, GridmixRecord> data = writer.getData();
  // check result
  assertEquals(2, data.size());

}

项目：hadoop-2.6.0-cdh5.4.3 文件：TestMRKeyValueTextInputFormat.java

private static List<Text> readSplit(KeyValueTextInputFormat format, 
    InputSplit split, Job job) throws IOException, InterruptedException {
  List<Text> result = new ArrayList<Text>();
  Configuration conf = job.getConfiguration();
  TaskAttemptContext context = MapReduceTestUtil.
    createDummyMapTaskAttemptContext(conf);
  RecordReader<Text, Text> reader = format.createRecordReader(split, 
    MapReduceTestUtil.createDummyMapTaskAttemptContext(conf));
  MapContext<Text, Text, Text, Text> mcontext = 
    new MapContextImpl<Text, Text, Text, Text>(conf, 
    context.getTaskAttemptID(), reader, null, null,
    MapReduceTestUtil.createDummyReporter(), 
    split);
  reader.initialize(split, mcontext);
  while (reader.nextKeyValue()) {
    result.add(new Text(reader.getCurrentValue()));
  }
  reader.close();
  return result;
}

项目：hadoop-2.6.0-cdh5.4.3 文件：TestCombineTextInputFormat.java

private static List<Text> readSplit(InputFormat<LongWritable,Text> format,
  InputSplit split, Job job) throws IOException, InterruptedException {
  List<Text> result = new ArrayList<Text>();
  Configuration conf = job.getConfiguration();
  TaskAttemptContext context = MapReduceTestUtil.
    createDummyMapTaskAttemptContext(conf);
  RecordReader<LongWritable, Text> reader = format.createRecordReader(split,
    MapReduceTestUtil.createDummyMapTaskAttemptContext(conf));
  MapContext<LongWritable,Text,LongWritable,Text> mcontext =
    new MapContextImpl<LongWritable,Text,LongWritable,Text>(conf,
    context.getTaskAttemptID(), reader, null, null,
    MapReduceTestUtil.createDummyReporter(),
    split);
  reader.initialize(split, mcontext);
  while (reader.nextKeyValue()) {
    result.add(new Text(reader.getCurrentValue()));
  }
  return result;
}

项目：hadoop-2.6.0-cdh5.4.3 文件：TestMRKeyValueTextInputFormat.java

private static List<Text> readSplit(KeyValueTextInputFormat format, 
    InputSplit split, Job job) throws IOException, InterruptedException {
  List<Text> result = new ArrayList<Text>();
  Configuration conf = job.getConfiguration();
  TaskAttemptContext context = MapReduceTestUtil.
    createDummyMapTaskAttemptContext(conf);
  RecordReader<Text, Text> reader = format.createRecordReader(split, 
    MapReduceTestUtil.createDummyMapTaskAttemptContext(conf));
  MapContext<Text, Text, Text, Text> mcontext = 
    new MapContextImpl<Text, Text, Text, Text>(conf, 
    context.getTaskAttemptID(), reader, null, null,
    MapReduceTestUtil.createDummyReporter(), 
    split);
  reader.initialize(split, mcontext);
  while (reader.nextKeyValue()) {
    result.add(new Text(reader.getCurrentValue()));
  }
  return result;
}

项目：hadoop-plus 文件：TestMRKeyValueTextInputFormat.java

private static List<Text> readSplit(KeyValueTextInputFormat format, 
    InputSplit split, Job job) throws IOException, InterruptedException {
  List<Text> result = new ArrayList<Text>();
  Configuration conf = job.getConfiguration();
  TaskAttemptContext context = MapReduceTestUtil.
    createDummyMapTaskAttemptContext(conf);
  RecordReader<Text, Text> reader = format.createRecordReader(split, 
    MapReduceTestUtil.createDummyMapTaskAttemptContext(conf));
  MapContext<Text, Text, Text, Text> mcontext = 
    new MapContextImpl<Text, Text, Text, Text>(conf, 
    context.getTaskAttemptID(), reader, null, null,
    MapReduceTestUtil.createDummyReporter(), 
    split);
  reader.initialize(split, mcontext);
  while (reader.nextKeyValue()) {
    result.add(new Text(reader.getCurrentValue()));
  }
  return result;
}

项目：hadoop-plus 文件：TestCombineTextInputFormat.java

private static List<Text> readSplit(InputFormat<LongWritable,Text> format,
  InputSplit split, Job job) throws IOException, InterruptedException {
  List<Text> result = new ArrayList<Text>();
  Configuration conf = job.getConfiguration();
  TaskAttemptContext context = MapReduceTestUtil.
    createDummyMapTaskAttemptContext(conf);
  RecordReader<LongWritable, Text> reader = format.createRecordReader(split,
    MapReduceTestUtil.createDummyMapTaskAttemptContext(conf));
  MapContext<LongWritable,Text,LongWritable,Text> mcontext =
    new MapContextImpl<LongWritable,Text,LongWritable,Text>(conf,
    context.getTaskAttemptID(), reader, null, null,
    MapReduceTestUtil.createDummyReporter(),
    split);
  reader.initialize(split, mcontext);
  while (reader.nextKeyValue()) {
    result.add(new Text(reader.getCurrentValue()));
  }
  return result;
}

项目：FlexMap 文件：TestMRKeyValueTextInputFormat.java

private static List<Text> readSplit(KeyValueTextInputFormat format, 
    InputSplit split, Job job) throws IOException, InterruptedException {
  List<Text> result = new ArrayList<Text>();
  Configuration conf = job.getConfiguration();
  TaskAttemptContext context = MapReduceTestUtil.
    createDummyMapTaskAttemptContext(conf);
  RecordReader<Text, Text> reader = format.createRecordReader(split, 
    MapReduceTestUtil.createDummyMapTaskAttemptContext(conf));
  MapContext<Text, Text, Text, Text> mcontext = 
    new MapContextImpl<Text, Text, Text, Text>(conf, 
    context.getTaskAttemptID(), reader, null, null,
    MapReduceTestUtil.createDummyReporter(), 
    split);
  reader.initialize(split, mcontext);
  while (reader.nextKeyValue()) {
    result.add(new Text(reader.getCurrentValue()));
  }
  reader.close();
  return result;
}

项目：FlexMap 文件：TestCombineTextInputFormat.java

private static List<Text> readSplit(InputFormat<LongWritable,Text> format,
  InputSplit split, Job job) throws IOException, InterruptedException {
  List<Text> result = new ArrayList<Text>();
  Configuration conf = job.getConfiguration();
  TaskAttemptContext context = MapReduceTestUtil.
    createDummyMapTaskAttemptContext(conf);
  RecordReader<LongWritable, Text> reader = format.createRecordReader(split,
    MapReduceTestUtil.createDummyMapTaskAttemptContext(conf));
  MapContext<LongWritable,Text,LongWritable,Text> mcontext =
    new MapContextImpl<LongWritable,Text,LongWritable,Text>(conf,
    context.getTaskAttemptID(), reader, null, null,
    MapReduceTestUtil.createDummyReporter(),
    split);
  reader.initialize(split, mcontext);
  while (reader.nextKeyValue()) {
    result.add(new Text(reader.getCurrentValue()));
  }
  return result;
}

项目：hops 文件：TestMRKeyValueTextInputFormat.java

private static List<Text> readSplit(KeyValueTextInputFormat format, 
    InputSplit split, Job job) throws IOException, InterruptedException {
  List<Text> result = new ArrayList<Text>();
  Configuration conf = job.getConfiguration();
  TaskAttemptContext context = MapReduceTestUtil.
    createDummyMapTaskAttemptContext(conf);
  RecordReader<Text, Text> reader = format.createRecordReader(split, 
    MapReduceTestUtil.createDummyMapTaskAttemptContext(conf));
  MapContext<Text, Text, Text, Text> mcontext = 
    new MapContextImpl<Text, Text, Text, Text>(conf, 
    context.getTaskAttemptID(), reader, null, null,
    MapReduceTestUtil.createDummyReporter(), 
    split);
  reader.initialize(split, mcontext);
  while (reader.nextKeyValue()) {
    result.add(new Text(reader.getCurrentValue()));
  }
  reader.close();
  return result;
}

项目：hops 文件：TestCombineTextInputFormat.java

private static List<Text> readSplit(InputFormat<LongWritable,Text> format,
  InputSplit split, Job job) throws IOException, InterruptedException {
  List<Text> result = new ArrayList<Text>();
  Configuration conf = job.getConfiguration();
  TaskAttemptContext context = MapReduceTestUtil.
    createDummyMapTaskAttemptContext(conf);
  RecordReader<LongWritable, Text> reader = format.createRecordReader(split,
    MapReduceTestUtil.createDummyMapTaskAttemptContext(conf));
  MapContext<LongWritable,Text,LongWritable,Text> mcontext =
    new MapContextImpl<LongWritable,Text,LongWritable,Text>(conf,
    context.getTaskAttemptID(), reader, null, null,
    MapReduceTestUtil.createDummyReporter(),
    split);
  reader.initialize(split, mcontext);
  while (reader.nextKeyValue()) {
    result.add(new Text(reader.getCurrentValue()));
  }
  return result;
}

项目：hadoop-TCP 文件：TestMRKeyValueTextInputFormat.java

private static List<Text> readSplit(KeyValueTextInputFormat format, 
    InputSplit split, Job job) throws IOException, InterruptedException {
  List<Text> result = new ArrayList<Text>();
  Configuration conf = job.getConfiguration();
  TaskAttemptContext context = MapReduceTestUtil.
    createDummyMapTaskAttemptContext(conf);
  RecordReader<Text, Text> reader = format.createRecordReader(split, 
    MapReduceTestUtil.createDummyMapTaskAttemptContext(conf));
  MapContext<Text, Text, Text, Text> mcontext = 
    new MapContextImpl<Text, Text, Text, Text>(conf, 
    context.getTaskAttemptID(), reader, null, null,
    MapReduceTestUtil.createDummyReporter(), 
    split);
  reader.initialize(split, mcontext);
  while (reader.nextKeyValue()) {
    result.add(new Text(reader.getCurrentValue()));
  }
  return result;
}

项目：hadoop-TCP 文件：TestCombineTextInputFormat.java

private static List<Text> readSplit(InputFormat<LongWritable,Text> format,
  InputSplit split, Job job) throws IOException, InterruptedException {
  List<Text> result = new ArrayList<Text>();
  Configuration conf = job.getConfiguration();
  TaskAttemptContext context = MapReduceTestUtil.
    createDummyMapTaskAttemptContext(conf);
  RecordReader<LongWritable, Text> reader = format.createRecordReader(split,
    MapReduceTestUtil.createDummyMapTaskAttemptContext(conf));
  MapContext<LongWritable,Text,LongWritable,Text> mcontext =
    new MapContextImpl<LongWritable,Text,LongWritable,Text>(conf,
    context.getTaskAttemptID(), reader, null, null,
    MapReduceTestUtil.createDummyReporter(),
    split);
  reader.initialize(split, mcontext);
  while (reader.nextKeyValue()) {
    result.add(new Text(reader.getCurrentValue()));
  }
  return result;
}

项目：hardfs 文件：TestMRKeyValueTextInputFormat.java

private static List<Text> readSplit(KeyValueTextInputFormat format, 
    InputSplit split, Job job) throws IOException, InterruptedException {
  List<Text> result = new ArrayList<Text>();
  Configuration conf = job.getConfiguration();
  TaskAttemptContext context = MapReduceTestUtil.
    createDummyMapTaskAttemptContext(conf);
  RecordReader<Text, Text> reader = format.createRecordReader(split, 
    MapReduceTestUtil.createDummyMapTaskAttemptContext(conf));
  MapContext<Text, Text, Text, Text> mcontext = 
    new MapContextImpl<Text, Text, Text, Text>(conf, 
    context.getTaskAttemptID(), reader, null, null,
    MapReduceTestUtil.createDummyReporter(), 
    split);
  reader.initialize(split, mcontext);
  while (reader.nextKeyValue()) {
    result.add(new Text(reader.getCurrentValue()));
  }
  return result;
}

项目：hardfs 文件：TestCombineTextInputFormat.java

private static List<Text> readSplit(InputFormat<LongWritable,Text> format,
  InputSplit split, Job job) throws IOException, InterruptedException {
  List<Text> result = new ArrayList<Text>();
  Configuration conf = job.getConfiguration();
  TaskAttemptContext context = MapReduceTestUtil.
    createDummyMapTaskAttemptContext(conf);
  RecordReader<LongWritable, Text> reader = format.createRecordReader(split,
    MapReduceTestUtil.createDummyMapTaskAttemptContext(conf));
  MapContext<LongWritable,Text,LongWritable,Text> mcontext =
    new MapContextImpl<LongWritable,Text,LongWritable,Text>(conf,
    context.getTaskAttemptID(), reader, null, null,
    MapReduceTestUtil.createDummyReporter(),
    split);
  reader.initialize(split, mcontext);
  while (reader.nextKeyValue()) {
    result.add(new Text(reader.getCurrentValue()));
  }
  return result;
}

项目：hadoop-on-lustre2 文件：TestMRKeyValueTextInputFormat.java

private static List<Text> readSplit(KeyValueTextInputFormat format, 
    InputSplit split, Job job) throws IOException, InterruptedException {
  List<Text> result = new ArrayList<Text>();
  Configuration conf = job.getConfiguration();
  TaskAttemptContext context = MapReduceTestUtil.
    createDummyMapTaskAttemptContext(conf);
  RecordReader<Text, Text> reader = format.createRecordReader(split, 
    MapReduceTestUtil.createDummyMapTaskAttemptContext(conf));
  MapContext<Text, Text, Text, Text> mcontext = 
    new MapContextImpl<Text, Text, Text, Text>(conf, 
    context.getTaskAttemptID(), reader, null, null,
    MapReduceTestUtil.createDummyReporter(), 
    split);
  reader.initialize(split, mcontext);
  while (reader.nextKeyValue()) {
    result.add(new Text(reader.getCurrentValue()));
  }
  return result;
}

项目：hadoop-on-lustre2 文件：TestCombineTextInputFormat.java

private static List<Text> readSplit(InputFormat<LongWritable,Text> format,
  InputSplit split, Job job) throws IOException, InterruptedException {
  List<Text> result = new ArrayList<Text>();
  Configuration conf = job.getConfiguration();
  TaskAttemptContext context = MapReduceTestUtil.
    createDummyMapTaskAttemptContext(conf);
  RecordReader<LongWritable, Text> reader = format.createRecordReader(split,
    MapReduceTestUtil.createDummyMapTaskAttemptContext(conf));
  MapContext<LongWritable,Text,LongWritable,Text> mcontext =
    new MapContextImpl<LongWritable,Text,LongWritable,Text>(conf,
    context.getTaskAttemptID(), reader, null, null,
    MapReduceTestUtil.createDummyReporter(),
    split);
  reader.initialize(split, mcontext);
  while (reader.nextKeyValue()) {
    result.add(new Text(reader.getCurrentValue()));
  }
  return result;
}

项目：hanoi-hadoop-2.0.0-cdh 文件：TestMRKeyValueTextInputFormat.java

private static List<Text> readSplit(KeyValueTextInputFormat format, 
    InputSplit split, Job job) throws IOException, InterruptedException {
  List<Text> result = new ArrayList<Text>();
  Configuration conf = job.getConfiguration();
  TaskAttemptContext context = MapReduceTestUtil.
    createDummyMapTaskAttemptContext(conf);
  RecordReader<Text, Text> reader = format.createRecordReader(split, 
    MapReduceTestUtil.createDummyMapTaskAttemptContext(conf));
  MapContext<Text, Text, Text, Text> mcontext = 
    new MapContextImpl<Text, Text, Text, Text>(conf, 
    context.getTaskAttemptID(), reader, null, null,
    MapReduceTestUtil.createDummyReporter(), 
    split);
  reader.initialize(split, mcontext);
  while (reader.nextKeyValue()) {
    result.add(new Text(reader.getCurrentValue()));
  }
  return result;
}

项目：mapreduce-fork 文件：TestMRKeyValueTextInputFormat.java

private static List<Text> readSplit(KeyValueTextInputFormat format, 
    InputSplit split, Job job) throws IOException, InterruptedException {
  List<Text> result = new ArrayList<Text>();
  Configuration conf = job.getConfiguration();
  TaskAttemptContext context = MapReduceTestUtil.
    createDummyMapTaskAttemptContext(conf);
  RecordReader<Text, Text> reader = format.createRecordReader(split, 
    MapReduceTestUtil.createDummyMapTaskAttemptContext(conf));
  MapContext<Text, Text, Text, Text> mcontext = 
    new MapContextImpl<Text, Text, Text, Text>(conf, 
    context.getTaskAttemptID(), reader, null, null,
    MapReduceTestUtil.createDummyReporter(), 
    split);
  reader.initialize(split, mcontext);
  while (reader.nextKeyValue()) {
    result.add(new Text(reader.getCurrentValue()));
  }
  return result;
}

项目：giraph-gora 文件：GiraphYarnTask.java

/**
 * Utility to generate dummy Mapper#Context for use in Giraph internals.
 * This is the "key hack" to inject MapReduce-related data structures
 * containing YARN cluster metadata (and our GiraphConf from the AppMaster)
 * into our Giraph BSP task code.
 * @param tid the TaskAttemptID to construct this Mapper#Context from.
 * @return sort of a Mapper#Context if you squint just right.
 */
private Context buildProxyMapperContext(final TaskAttemptID tid) {
  MapContext mc = new MapContextImpl<Object, Object, Object, Object>(
    conf, // our Configuration, populated back at the GiraphYarnClient.
    tid,  // our TaskAttemptId, generated w/YARN app, container, attempt IDs
    null, // RecordReader here will never be used by Giraph
    null, // RecordWriter here will never be used by Giraph
    null, // OutputCommitter here will never be used by Giraph
    new TaskAttemptContextImpl.DummyReporter() { // goes in task logs for now
      @Override
      public void setStatus(String msg) {
        LOG.info("[STATUS: task-" + bspTaskId + "] " + msg);
      }
    },
    null); // Input split setting here will never be used by Giraph

  // now, we wrap our MapContext ref so we can produce a Mapper#Context
  WrappedMapper<Object, Object, Object, Object> wrappedMapper
    = new WrappedMapper<Object, Object, Object, Object>();
  return wrappedMapper.getMapContext(mc);
}

项目：giraph-research 文件：GiraphYarnTask.java

/**
 * Utility to generate dummy Mapper#Context for use in Giraph internals.
 * This is the "key hack" to inject MapReduce-related data structures
 * containing YARN cluster metadata (and our GiraphConf from the AppMaster)
 * into our Giraph BSP task code.
 * @param tid the TaskAttemptID to construct this Mapper#Context from.
 * @return sort of a Mapper#Context if you squint just right.
 */
private Context buildProxyMapperContext(final TaskAttemptID tid) {
  MapContext mc = new MapContextImpl<Object, Object, Object, Object>(
    conf, // our Configuration, populated back at the GiraphYarnClient.
    tid,  // our TaskAttemptId, generated w/YARN app, container, attempt IDs
    null, // RecordReader here will never be used by Giraph
    null, // RecordWriter here will never be used by Giraph
    null, // OutputCommitter here will never be used by Giraph
    new TaskAttemptContextImpl.DummyReporter() { // goes in task logs for now
      @Override
      public void setStatus(String msg) {
        LOG.info("[STATUS: task-" + bspTaskId + "] " + msg);
      }
    },
    null); // Input split setting here will never be used by Giraph

  // now, we wrap our MapContext ref so we can produce a Mapper#Context
  WrappedMapper<Object, Object, Object, Object> wrappedMapper
    = new WrappedMapper<Object, Object, Object, Object>();
  return wrappedMapper.getMapContext(mc);
}

项目：giraph-research 文件：GiraphYarnTask.java

/**
 * Utility to generate dummy Mapper#Context for use in Giraph internals.
 * This is the "key hack" to inject MapReduce-related data structures
 * containing YARN cluster metadata (and our GiraphConf from the AppMaster)
 * into our Giraph BSP task code.
 * @param tid the TaskAttemptID to construct this Mapper#Context from.
 * @return sort of a Mapper#Context if you squint just right.
 */
private Context buildProxyMapperContext(final TaskAttemptID tid) {
  MapContext mc = new MapContextImpl<Object, Object, Object, Object>(
    conf, // our Configuration, populated back at the GiraphYarnClient.
    tid,  // our TaskAttemptId, generated w/YARN app, container, attempt IDs
    null, // RecordReader here will never be used by Giraph
    null, // RecordWriter here will never be used by Giraph
    null, // OutputCommitter here will never be used by Giraph
    new TaskAttemptContextImpl.DummyReporter() { // goes in task logs for now
      @Override
      public void setStatus(String msg) {
        LOG.info("[STATUS: task-" + bspTaskId + "] " + msg);
      }
    },
    null); // Input split setting here will never be used by Giraph

  // now, we wrap our MapContext ref so we can produce a Mapper#Context
  WrappedMapper<Object, Object, Object, Object> wrappedMapper
    = new WrappedMapper<Object, Object, Object, Object>();
  return wrappedMapper.getMapContext(mc);
}

项目：giraph-research 文件：GiraphYarnTask.java

/**
 * Utility to generate dummy Mapper#Context for use in Giraph internals.
 * This is the "key hack" to inject MapReduce-related data structures
 * containing YARN cluster metadata (and our GiraphConf from the AppMaster)
 * into our Giraph BSP task code.
 * @param tid the TaskAttemptID to construct this Mapper#Context from.
 * @return sort of a Mapper#Context if you squint just right.
 */
private Context buildProxyMapperContext(final TaskAttemptID tid) {
  MapContext mc = new MapContextImpl<Object, Object, Object, Object>(
    conf, // our Configuration, populated back at the GiraphYarnClient.
    tid,  // our TaskAttemptId, generated w/YARN app, container, attempt IDs
    null, // RecordReader here will never be used by Giraph
    null, // RecordWriter here will never be used by Giraph
    null, // OutputCommitter here will never be used by Giraph
    new TaskAttemptContextImpl.DummyReporter() { // goes in task logs for now
      @Override
      public void setStatus(String msg) {
        LOG.info("[STATUS: task-" + bspTaskId + "] " + msg);
      }
    },
    null); // Input split setting here will never be used by Giraph

  // now, we wrap our MapContext ref so we can produce a Mapper#Context
  WrappedMapper<Object, Object, Object, Object> wrappedMapper
    = new WrappedMapper<Object, Object, Object, Object>();
  return wrappedMapper.getMapContext(mc);
}

项目：circus-train 文件：StubContext.java

public StubContext(Configuration conf, RecordReader<Text, CopyListingFileStatus> reader, int taskId)
    throws IOException, InterruptedException {

  WrappedMapper<Text, CopyListingFileStatus, Text, Text> wrappedMapper = new WrappedMapper<>();

  MapContextImpl<Text, CopyListingFileStatus, Text, Text> contextImpl = new MapContextImpl<>(conf,
      getTaskAttemptID(taskId), reader, writer, null, reporter, null);

  this.reader = reader;
  mapperContext = wrappedMapper.getMapContext(contextImpl);
}

项目：hadoop 文件：TestNLineInputFormat.java

void checkFormat(Job job, int expectedN, int lastN) 
    throws IOException, InterruptedException {
  NLineInputFormat format = new NLineInputFormat();
  List<InputSplit> splits = format.getSplits(job);
  int count = 0;
  for (int i = 0; i < splits.size(); i++) {
    assertEquals("There are no split locations", 0,
                 splits.get(i).getLocations().length);
    TaskAttemptContext context = MapReduceTestUtil.
      createDummyMapTaskAttemptContext(job.getConfiguration());
    RecordReader<LongWritable, Text> reader = format.createRecordReader(
      splits.get(i), context);
    Class<?> clazz = reader.getClass();
    assertEquals("reader class is LineRecordReader.", 
      LineRecordReader.class, clazz);
    MapContext<LongWritable, Text, LongWritable, Text> mcontext = 
      new MapContextImpl<LongWritable, Text, LongWritable, Text>(
        job.getConfiguration(), context.getTaskAttemptID(), reader, null,
        null, MapReduceTestUtil.createDummyReporter(), splits.get(i));
    reader.initialize(splits.get(i), mcontext);

    try {
      count = 0;
      while (reader.nextKeyValue()) {
        count++;
      }
    } finally {
      reader.close();
    }
    if ( i == splits.size() - 1) {
      assertEquals("number of lines in split(" + i + ") is wrong" ,
                   lastN, count);
    } else {
      assertEquals("number of lines in split(" + i + ") is wrong" ,
                   expectedN, count);
    }
  }
}

项目：hadoop 文件：TestMRSequenceFileInputFilter.java

private int countRecords(int numSplits) 
    throws IOException, InterruptedException {
  InputFormat<Text, BytesWritable> format =
    new SequenceFileInputFilter<Text, BytesWritable>();
  if (numSplits == 0) {
    numSplits =
      random.nextInt(MAX_LENGTH / (SequenceFile.SYNC_INTERVAL / 20)) + 1;
  }
  FileInputFormat.setMaxInputSplitSize(job, 
    fs.getFileStatus(inFile).getLen() / numSplits);
  TaskAttemptContext context = MapReduceTestUtil.
    createDummyMapTaskAttemptContext(job.getConfiguration());
  // check each split
  int count = 0;
  for (InputSplit split : format.getSplits(job)) {
    RecordReader<Text, BytesWritable> reader =
      format.createRecordReader(split, context);
    MapContext<Text, BytesWritable, Text, BytesWritable> mcontext = 
      new MapContextImpl<Text, BytesWritable, Text, BytesWritable>(
      job.getConfiguration(), 
      context.getTaskAttemptID(), reader, null, null, 
      MapReduceTestUtil.createDummyReporter(), split);
    reader.initialize(split, mcontext);
    try {
      while (reader.nextKeyValue()) {
        LOG.info("Accept record " + reader.getCurrentKey().toString());
        count++;
      }
    } finally {
      reader.close();
    }
  }
  return count;
}

项目：hadoop 文件：TestFixedLengthInputFormat.java

/**
 * Test with no record length set.
 */
@Test (timeout=5000)
public void testNoRecordLength() throws Exception {
  localFs.delete(workDir, true);
  Path file = new Path(workDir, new String("testFormat.txt"));
  createFile(file, null, 10, 10);
  // Create the job and do not set fixed record length
  Job job = Job.getInstance(defaultConf);
  FileInputFormat.setInputPaths(job, workDir);
  FixedLengthInputFormat format = new FixedLengthInputFormat();
  List<InputSplit> splits = format.getSplits(job);
  boolean exceptionThrown = false;
  for (InputSplit split : splits) {
    try {
      TaskAttemptContext context = MapReduceTestUtil.
          createDummyMapTaskAttemptContext(job.getConfiguration());
      RecordReader<LongWritable, BytesWritable> reader =
          format.createRecordReader(split, context);
      MapContext<LongWritable, BytesWritable, LongWritable, BytesWritable>
          mcontext =
          new MapContextImpl<LongWritable, BytesWritable, LongWritable,
          BytesWritable>(job.getConfiguration(), context.getTaskAttemptID(),
          reader, null, null, MapReduceTestUtil.createDummyReporter(), split);
      reader.initialize(split, mcontext);
    } catch(IOException ioe) {
      exceptionThrown = true;
      LOG.info("Exception message:" + ioe.getMessage());
    }
  }
  assertTrue("Exception for not setting record length:", exceptionThrown);
}

项目：hadoop 文件：TestFixedLengthInputFormat.java

/**
 * Test with record length set to 0
 */
@Test (timeout=5000)
public void testZeroRecordLength() throws Exception {
  localFs.delete(workDir, true);
  Path file = new Path(workDir, new String("testFormat.txt"));
  createFile(file, null, 10, 10);
  Job job = Job.getInstance(defaultConf);
  // Set the fixed length record length config property 
  FixedLengthInputFormat format = new FixedLengthInputFormat();
  format.setRecordLength(job.getConfiguration(), 0);
  FileInputFormat.setInputPaths(job, workDir);
  List<InputSplit> splits = format.getSplits(job);
  boolean exceptionThrown = false;
  for (InputSplit split : splits) {
    try {
      TaskAttemptContext context =
          MapReduceTestUtil.createDummyMapTaskAttemptContext(
          job.getConfiguration());
      RecordReader<LongWritable, BytesWritable> reader = 
          format.createRecordReader(split, context);
      MapContext<LongWritable, BytesWritable, LongWritable, BytesWritable>
          mcontext =
          new MapContextImpl<LongWritable, BytesWritable, LongWritable,
          BytesWritable>(job.getConfiguration(), context.getTaskAttemptID(),
          reader, null, null, MapReduceTestUtil.createDummyReporter(), split);
      reader.initialize(split, mcontext);
    } catch(IOException ioe) {
      exceptionThrown = true;
      LOG.info("Exception message:" + ioe.getMessage());
    }
  }
  assertTrue("Exception for zero record length:", exceptionThrown);
}

项目：hadoop 文件：TestFixedLengthInputFormat.java

/**
 * Test with record length set to a negative value
 */
@Test (timeout=5000)
public void testNegativeRecordLength() throws Exception {
  localFs.delete(workDir, true);
  Path file = new Path(workDir, new String("testFormat.txt"));
  createFile(file, null, 10, 10);
  // Set the fixed length record length config property 
  Job job = Job.getInstance(defaultConf);
  FixedLengthInputFormat format = new FixedLengthInputFormat();
  format.setRecordLength(job.getConfiguration(), -10);
  FileInputFormat.setInputPaths(job, workDir);
  List<InputSplit> splits = format.getSplits(job);
  boolean exceptionThrown = false;
  for (InputSplit split : splits) {
    try {
      TaskAttemptContext context = MapReduceTestUtil.
          createDummyMapTaskAttemptContext(job.getConfiguration());
      RecordReader<LongWritable, BytesWritable> reader = 
          format.createRecordReader(split, context);
      MapContext<LongWritable, BytesWritable, LongWritable, BytesWritable>
          mcontext =
          new MapContextImpl<LongWritable, BytesWritable, LongWritable,
          BytesWritable>(job.getConfiguration(), context.getTaskAttemptID(),
          reader, null, null, MapReduceTestUtil.createDummyReporter(), split);
      reader.initialize(split, mcontext);
    } catch(IOException ioe) {
      exceptionThrown = true;
      LOG.info("Exception message:" + ioe.getMessage());
    }
  }
  assertTrue("Exception for negative record length:", exceptionThrown);
}

项目：hadoop 文件：TestFixedLengthInputFormat.java

private static List<String> readSplit(FixedLengthInputFormat format, 
                                      InputSplit split, 
                                      Job job) throws Exception {
  List<String> result = new ArrayList<String>();
  TaskAttemptContext context = MapReduceTestUtil.
      createDummyMapTaskAttemptContext(job.getConfiguration());
  RecordReader<LongWritable, BytesWritable> reader =
      format.createRecordReader(split, context);
  MapContext<LongWritable, BytesWritable, LongWritable, BytesWritable>
      mcontext =
      new MapContextImpl<LongWritable, BytesWritable, LongWritable,
      BytesWritable>(job.getConfiguration(), context.getTaskAttemptID(),
      reader, null, null, MapReduceTestUtil.createDummyReporter(), split);
  LongWritable key;
  BytesWritable value;
  try {
    reader.initialize(split, mcontext);
    while (reader.nextKeyValue()) {
      key = reader.getCurrentKey();
      value = reader.getCurrentValue();
      result.add(new String(value.getBytes(), 0, value.getLength()));
    }
  } finally {
    reader.close();
  }
  return result;
}

项目：hadoop 文件：MultithreadedMapper.java

MapRunner(Context context) throws IOException, InterruptedException {
  mapper = ReflectionUtils.newInstance(mapClass, 
                                       context.getConfiguration());
  MapContext<K1, V1, K2, V2> mapContext = 
    new MapContextImpl<K1, V1, K2, V2>(outer.getConfiguration(), 
                                       outer.getTaskAttemptID(),
                                       reader,
                                       new SubMapRecordWriter(), 
                                       context.getOutputCommitter(),
                                       new SubMapStatusReporter(),
                                       outer.getInputSplit());
  subcontext = new WrappedMapper<K1, V1, K2, V2>().getMapContext(mapContext);
  reader.initialize(context.getInputSplit(), context);
}

项目：hadoop 文件：TestContextFactory.java

@Test
public void testCloneMapContext() throws Exception {
  TaskID taskId = new TaskID(jobId, TaskType.MAP, 0);
  TaskAttemptID taskAttemptid = new TaskAttemptID(taskId, 0);
  MapContext<IntWritable, IntWritable, IntWritable, IntWritable> mapContext =
  new MapContextImpl<IntWritable, IntWritable, IntWritable, IntWritable>(
      conf, taskAttemptid, null, null, null, null, null);
  Mapper<IntWritable, IntWritable, IntWritable, IntWritable>.Context mapperContext = 
    new WrappedMapper<IntWritable, IntWritable, IntWritable, IntWritable>().getMapContext(
        mapContext);
  ContextFactory.cloneMapContext(mapperContext, conf, null, null);
}

项目：hadoop 文件：StubContext.java

public StubContext(Configuration conf,
    RecordReader<Text, CopyListingFileStatus> reader, int taskId)
    throws IOException, InterruptedException {

  WrappedMapper<Text, CopyListingFileStatus, Text, Text> wrappedMapper
          = new WrappedMapper<Text, CopyListingFileStatus, Text, Text>();

  MapContextImpl<Text, CopyListingFileStatus, Text, Text> contextImpl
          = new MapContextImpl<Text, CopyListingFileStatus, Text, Text>(conf,
          getTaskAttemptID(taskId), reader, writer,
          null, reporter, null);

  this.reader = reader;
  this.mapperContext = wrappedMapper.getMapContext(contextImpl);
}

项目：hadoop 文件：TestGridMixClasses.java

@SuppressWarnings({"rawtypes", "unchecked"})
@Test (timeout=10000)
public void testLoadMapper() throws Exception {

  Configuration conf = new Configuration();
  conf.setInt(JobContext.NUM_REDUCES, 2);

  CompressionEmulationUtil.setCompressionEmulationEnabled(conf, true);
  conf.setBoolean(MRJobConfig.MAP_OUTPUT_COMPRESS, true);

  TaskAttemptID taskId = new TaskAttemptID();
  RecordReader<NullWritable, GridmixRecord> reader = new FakeRecordReader();

  LoadRecordGkGrWriter writer = new LoadRecordGkGrWriter();

  OutputCommitter committer = new CustomOutputCommitter();
  StatusReporter reporter = new TaskAttemptContextImpl.DummyReporter();
  LoadSplit split = getLoadSplit();

  MapContext<NullWritable, GridmixRecord, GridmixKey, GridmixRecord> mapContext = new MapContextImpl<NullWritable, GridmixRecord, GridmixKey, GridmixRecord>(
          conf, taskId, reader, writer, committer, reporter, split);
  // context
  Context ctx = new WrappedMapper<NullWritable, GridmixRecord, GridmixKey, GridmixRecord>()
          .getMapContext(mapContext);

  reader.initialize(split, ctx);
  ctx.getConfiguration().setBoolean(MRJobConfig.MAP_OUTPUT_COMPRESS, true);
  CompressionEmulationUtil.setCompressionEmulationEnabled(
          ctx.getConfiguration(), true);

  LoadJob.LoadMapper mapper = new LoadJob.LoadMapper();
  // setup, map, clean
  mapper.run(ctx);

  Map<GridmixKey, GridmixRecord> data = writer.getData();
  // check result
  assertEquals(2, data.size());

}