How to use

getOutputCommitter

method

in

org.apache.hadoop.mapreduce.Mapper$Context

GobblinOutputCommitter gobblinOutputCommitter = (GobblinOutputCommitter) context.getOutputCommitter();
gobblinOutputCommitter.getAttemptIdToMultiTaskAttempt()
  .put(context.getTaskAttemptID().toString(), gobblinMultiTaskAttempt);

@SuppressWarnings("unchecked")
private Context createSubContextForHadoop2(Context context, Class<?> mapContextImplClazz)
    throws NoSuchMethodException, InstantiationException, IllegalAccessException,
    InvocationTargetException, ClassNotFoundException {
  Constructor<?> constructor = mapContextImplClazz.getDeclaredConstructor(Configuration.class,
      TaskAttemptID.class, RecordReader.class, RecordWriter.class, OutputCommitter.class,
      StatusReporter.class, InputSplit.class);
  constructor.setAccessible(true);
  Object mapContext = constructor.newInstance(outer.getConfiguration(), outer.getTaskAttemptID(), reader,
      new SubMapRecordWriter(), context.getOutputCommitter(), new SubMapStatusReporter(),
      outer.getInputSplit());
  Class<?> wrappedMapperClazz = Class.forName("org.apache.hadoop.mapreduce.lib.map.WrappedMapper");
  Object wrappedMapper = wrappedMapperClazz.newInstance();
  Method method = wrappedMapperClazz.getDeclaredMethod("getMapContext",
      Class.forName("org.apache.hadoop.mapreduce.MapContext"));
  return (Context) (method.invoke(wrappedMapper, mapContext));
}

@SuppressWarnings("unchecked")
private Context createSubContextForHadoop2(Context context, Class<?> mapContextImplClazz)
    throws NoSuchMethodException, InstantiationException, IllegalAccessException,
    InvocationTargetException, ClassNotFoundException {
  Constructor<?> constructor = mapContextImplClazz.getDeclaredConstructor(Configuration.class,
      TaskAttemptID.class, RecordReader.class, RecordWriter.class, OutputCommitter.class,
      StatusReporter.class, InputSplit.class);
  constructor.setAccessible(true);
  Object mapContext = constructor.newInstance(outer.getConfiguration(), outer.getTaskAttemptID(), reader,
      new SubMapRecordWriter(), context.getOutputCommitter(), new SubMapStatusReporter(),
      outer.getInputSplit());
  Class<?> wrappedMapperClazz = Class.forName("org.apache.hadoop.mapreduce.lib.map.WrappedMapper");
  Object wrappedMapper = wrappedMapperClazz.newInstance();
  Method method = wrappedMapperClazz.getDeclaredMethod("getMapContext",
      Class.forName("org.apache.hadoop.mapreduce.MapContext"));
  return (Context) (method.invoke(wrappedMapper, mapContext));
}

GobblinOutputCommitter gobblinOutputCommitter = (GobblinOutputCommitter) context.getOutputCommitter();
gobblinOutputCommitter.getAttemptIdToMultiTaskAttempt()
  .put(context.getTaskAttemptID().toString(), gobblinMultiTaskAttempt);

GobblinOutputCommitter gobblinOutputCommitter = (GobblinOutputCommitter) context.getOutputCommitter();
gobblinOutputCommitter.getAttemptIdToMultiTaskAttempt()
  .put(context.getTaskAttemptID().toString(), gobblinMultiTaskAttempt);

@SuppressWarnings("unchecked")
private Context createSubContextForHadoop1(Context context) throws NoSuchMethodException,
    InstantiationException, IllegalAccessException, InvocationTargetException {
  Constructor<?> constructor = Context.class.getDeclaredConstructor(Mapper.class, Configuration.class,
      TaskAttemptID.class, RecordReader.class, RecordWriter.class, OutputCommitter.class,
      StatusReporter.class, InputSplit.class);
  constructor.setAccessible(true);
  return (Context) constructor.newInstance(mapper, outer.getConfiguration(), outer.getTaskAttemptID(),
      reader, new SubMapRecordWriter(), context.getOutputCommitter(), new SubMapStatusReporter(),
      outer.getInputSplit());
}

@SuppressWarnings("unchecked")
private Context createSubContextForHadoop1(Context context) throws NoSuchMethodException,
    InstantiationException, IllegalAccessException, InvocationTargetException {
  Constructor<?> constructor = Context.class.getDeclaredConstructor(Mapper.class, Configuration.class,
      TaskAttemptID.class, RecordReader.class, RecordWriter.class, OutputCommitter.class,
      StatusReporter.class, InputSplit.class);
  constructor.setAccessible(true);
  return (Context) constructor.newInstance(mapper, outer.getConfiguration(), outer.getTaskAttemptID(),
      reader, new SubMapRecordWriter(), context.getOutputCommitter(), new SubMapStatusReporter(),
      outer.getInputSplit());
}