How to use

registerItemStream

method

in

org.springframework.batch.core.step.item.ChunkMonitor

@Override
public AbstractTaskletStepBuilder<SimpleStepBuilder<I, O>> stream(ItemStream stream) {
  if (stream instanceof ItemReader<?>) {
    if (!streamIsReader) {
      streamIsReader = true;
      super.stream(chunkMonitor);
    }
    // In cases where multiple nested item readers are registered,
    // they all want to get the open() and close() callbacks.
    chunkMonitor.registerItemStream(stream);
  }
  else {
    super.stream(stream);
  }
  return this;
}

@Before
public void setUp() {
  monitor.setItemReader(new ItemReader<String>() {
    @Override
    public String read() throws Exception, UnexpectedInputException, ParseException {
      return "" + (count++);
    }
  });
  monitor.registerItemStream(new ItemStreamSupport() {
    @Override
    public void close() {
      super.close();
      closed = true;
    }
  });
  monitor.setChunkSize(CHUNK_SIZE);
}

@Override
public AbstractTaskletStepBuilder<SimpleStepBuilder<I, O>> stream(ItemStream stream) {
  if (stream instanceof ItemReader<?>) {
    if (!streamIsReader) {
      streamIsReader = true;
      super.stream(chunkMonitor);
    }
    // In cases where multiple nested item readers are registered,
    // they all want to get the open() and close() callbacks.
    chunkMonitor.registerItemStream(stream);
  }
  else {
    super.stream(stream);
  }
  return this;
}

@Override
public AbstractTaskletStepBuilder<SimpleStepBuilder<I, O>> stream(ItemStream stream) {
  if (stream instanceof ItemReader<?>) {
    if (!streamIsReader) {
      streamIsReader = true;
      super.stream(chunkMonitor);
    }
    // In cases where multiple nested item readers are registered,
    // they all want to get the open() and close() callbacks.
    chunkMonitor.registerItemStream(stream);
  }
  else {
    super.stream(stream);
  }
  return this;
}

@Override
public AbstractTaskletStepBuilder<SimpleStepBuilder<I, O>> stream(ItemStream stream) {
  if (stream instanceof ItemReader<?>) {
    if (!streamIsReader) {
      streamIsReader = true;
      super.stream(chunkMonitor);
    }
    // In cases where multiple nested item readers are registered,
    // they all want to get the open() and close() callbacks.
    chunkMonitor.registerItemStream(stream);
  }
  else {
    super.stream(stream);
  }
  return this;
}

if (stream instanceof ItemReader<?>) {
  streamIsReader = true;
  chunkMonitor.registerItemStream(stream);