| /* |
| * 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.iotdb.hive; |
| |
| import org.apache.iotdb.hadoop.tsfile.IReaderSet; |
| import org.apache.iotdb.hadoop.tsfile.TSFInputSplit; |
| import org.apache.iotdb.hadoop.tsfile.TSFRecordReader; |
| |
| import org.apache.hadoop.io.MapWritable; |
| import org.apache.hadoop.io.NullWritable; |
| import org.apache.hadoop.io.Text; |
| import org.apache.hadoop.mapred.InputSplit; |
| import org.apache.hadoop.mapred.JobConf; |
| import org.apache.hadoop.mapred.RecordReader; |
| import org.apache.tsfile.read.TsFileSequenceReader; |
| import org.apache.tsfile.read.common.Field; |
| import org.apache.tsfile.read.common.RowRecord; |
| import org.apache.tsfile.read.query.dataset.QueryDataSet; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import static org.apache.iotdb.hadoop.tsfile.TSFRecordReader.getCurrentValue; |
| |
| public class TSFHiveRecordReader implements RecordReader<NullWritable, MapWritable>, IReaderSet { |
| |
| private static final Logger logger = LoggerFactory.getLogger(TSFHiveRecordReader.class); |
| |
| /** all datasets corresponding to one specific split */ |
| private List<QueryDataSet> dataSetList = new ArrayList<>(); |
| /** |
| * List for name of devices. The order corresponds to the order of dataSetList. Means that |
| * deviceIdList[i] is the name of device for dataSetList[i]. |
| */ |
| private List<String> deviceIdList = new ArrayList<>(); |
| /** The index of QueryDataSet that is currently processed */ |
| private int currentIndex = 0; |
| |
| private boolean isReadDeviceId; |
| private boolean isReadTime; |
| private TsFileSequenceReader reader; |
| private List<String> measurementIds; |
| |
| @Override |
| public boolean next(NullWritable key, MapWritable value) throws IOException { |
| while (currentIndex < dataSetList.size()) { |
| if (!dataSetList.get(currentIndex).hasNext()) { |
| currentIndex++; |
| } else { |
| RowRecord rowRecord = dataSetList.get(currentIndex).next(); |
| List<Field> fields = rowRecord.getFields(); |
| long timestamp = rowRecord.getTimestamp(); |
| |
| try { |
| MapWritable res = new MapWritable(); |
| getCurrentValue( |
| deviceIdList, |
| currentIndex, |
| timestamp, |
| isReadTime, |
| isReadDeviceId, |
| fields, |
| measurementIds) |
| .forEach((k, v) -> res.put(new Text(k.toString().toLowerCase()), v)); |
| value.putAll(res); |
| } catch (InterruptedException e) { |
| Thread.currentThread().interrupt(); |
| throw new IOException(e.getMessage()); |
| } |
| |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| @Override |
| public NullWritable createKey() { |
| return NullWritable.get(); |
| } |
| |
| @Override |
| public MapWritable createValue() { |
| return new MapWritable(); |
| } |
| |
| @Override |
| public long getPos() { |
| // can't know |
| return 0; |
| } |
| |
| public TSFHiveRecordReader(InputSplit split, JobConf job) throws IOException { |
| if (split instanceof TSFInputSplit) { |
| TSFRecordReader.initialize((TSFInputSplit) split, job, this, dataSetList, deviceIdList); |
| } else { |
| logger.error( |
| "The InputSplit class is not {}, the class is {}", |
| TSFInputSplit.class.getName(), |
| split.getClass().getName()); |
| throw new InternalError( |
| String.format( |
| "The InputSplit class is not %s, the class is %s", |
| TSFInputSplit.class.getName(), split.getClass().getName())); |
| } |
| } |
| |
| @Override |
| public float getProgress() { |
| return 0; |
| } |
| |
| @Override |
| public void close() throws IOException { |
| dataSetList = null; |
| deviceIdList = null; |
| reader.close(); |
| } |
| |
| @Override |
| public void setReader(TsFileSequenceReader reader) { |
| this.reader = reader; |
| } |
| |
| @Override |
| public void setMeasurementIds(List<String> measurementIds) { |
| this.measurementIds = measurementIds; |
| } |
| |
| @Override |
| public void setReadDeviceId(boolean isReadDeviceId) { |
| this.isReadDeviceId = isReadDeviceId; |
| } |
| |
| @Override |
| public void setReadTime(boolean isReadTime) { |
| this.isReadTime = isReadTime; |
| } |
| } |