| /* |
| * 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.db.storageengine.dataregion.compaction.execute.utils.reader; |
| |
| import org.apache.iotdb.commons.path.AlignedPath; |
| import org.apache.iotdb.commons.path.MeasurementPath; |
| import org.apache.iotdb.commons.path.PartialPath; |
| import org.apache.iotdb.commons.utils.TestOnly; |
| import org.apache.iotdb.db.queryengine.execution.fragment.FragmentInstanceContext; |
| import org.apache.iotdb.db.queryengine.execution.operator.source.AlignedSeriesScanUtil; |
| import org.apache.iotdb.db.queryengine.execution.operator.source.SeriesScanUtil; |
| import org.apache.iotdb.db.queryengine.plan.planner.plan.parameter.SeriesScanOptions; |
| import org.apache.iotdb.db.queryengine.plan.statement.component.Ordering; |
| import org.apache.iotdb.db.storageengine.dataregion.read.QueryDataSource; |
| import org.apache.iotdb.db.storageengine.dataregion.tsfile.TsFileResource; |
| |
| import com.google.common.collect.Sets; |
| import org.apache.tsfile.read.common.block.TsBlock; |
| |
| import java.io.IOException; |
| import java.util.HashSet; |
| import java.util.List; |
| import java.util.Set; |
| |
| public class SeriesDataBlockReader implements IDataBlockReader { |
| |
| private final SeriesScanUtil seriesScanUtil; |
| |
| private TsBlock tsBlock; |
| |
| private boolean hasCachedBatchData = false; |
| |
| public SeriesDataBlockReader( |
| PartialPath seriesPath, |
| Set<String> allSensors, |
| FragmentInstanceContext context, |
| QueryDataSource dataSource, |
| boolean ascending) { |
| SeriesScanOptions.Builder scanOptionsBuilder = new SeriesScanOptions.Builder(); |
| scanOptionsBuilder.withAllSensors(allSensors); |
| |
| if (seriesPath instanceof AlignedPath) { |
| this.seriesScanUtil = |
| new AlignedSeriesScanUtil( |
| seriesPath, |
| ascending ? Ordering.ASC : Ordering.DESC, |
| scanOptionsBuilder.build(), |
| context); |
| } else if (seriesPath instanceof MeasurementPath) { |
| this.seriesScanUtil = |
| new SeriesScanUtil( |
| seriesPath, |
| ascending ? Ordering.ASC : Ordering.DESC, |
| scanOptionsBuilder.build(), |
| context); |
| } else { |
| throw new IllegalArgumentException("Should call exact sub class!"); |
| } |
| this.seriesScanUtil.initQueryDataSource(dataSource); |
| } |
| |
| @TestOnly |
| public SeriesDataBlockReader( |
| PartialPath seriesPath, |
| FragmentInstanceContext context, |
| List<TsFileResource> seqFileResource, |
| List<TsFileResource> unseqFileResource, |
| boolean ascending) { |
| SeriesScanOptions.Builder scanOptionsBuilder = new SeriesScanOptions.Builder(); |
| if (seriesPath instanceof AlignedPath) { |
| scanOptionsBuilder.withAllSensors( |
| new HashSet<>(((AlignedPath) seriesPath).getMeasurementList())); |
| this.seriesScanUtil = |
| new AlignedSeriesScanUtil( |
| seriesPath, |
| ascending ? Ordering.ASC : Ordering.DESC, |
| scanOptionsBuilder.build(), |
| context); |
| } else { |
| scanOptionsBuilder.withAllSensors(Sets.newHashSet(seriesPath.getMeasurement())); |
| this.seriesScanUtil = |
| new SeriesScanUtil( |
| seriesPath, |
| ascending ? Ordering.ASC : Ordering.DESC, |
| scanOptionsBuilder.build(), |
| context); |
| } |
| |
| QueryDataSource queryDataSource = new QueryDataSource(seqFileResource, unseqFileResource); |
| seriesScanUtil.initQueryDataSource(queryDataSource); |
| } |
| |
| @Override |
| public boolean hasNextBatch() throws IOException { |
| |
| if (hasCachedBatchData) { |
| return true; |
| } |
| |
| /* |
| * consume page data firstly |
| */ |
| if (readPageData()) { |
| hasCachedBatchData = true; |
| return true; |
| } |
| |
| /* |
| * consume chunk data secondly |
| */ |
| if (readChunkData()) { |
| hasCachedBatchData = true; |
| return true; |
| } |
| |
| /* |
| * consume next file finally |
| */ |
| while (seriesScanUtil.hasNextFile()) { |
| if (readChunkData()) { |
| hasCachedBatchData = true; |
| return true; |
| } |
| } |
| return hasCachedBatchData; |
| } |
| |
| @Override |
| public TsBlock nextBatch() throws IOException { |
| if (hasCachedBatchData || hasNextBatch()) { |
| hasCachedBatchData = false; |
| return tsBlock; |
| } |
| throw new IOException("no next block"); |
| } |
| |
| @Override |
| public void close() throws IOException { |
| // no resources need to close |
| } |
| |
| private boolean readChunkData() throws IOException { |
| while (seriesScanUtil.hasNextChunk()) { |
| if (readPageData()) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| private boolean readPageData() throws IOException { |
| while (seriesScanUtil.hasNextPage()) { |
| tsBlock = seriesScanUtil.nextPage(); |
| if (!isEmpty(tsBlock)) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| private boolean isEmpty(TsBlock tsBlock) { |
| return tsBlock == null || tsBlock.isEmpty(); |
| } |
| } |