| /* |
| * 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.tsfile.read.controller; |
| |
| import org.apache.iotdb.tsfile.common.cache.LRUCache; |
| import org.apache.iotdb.tsfile.file.metadata.AlignedTimeSeriesMetadata; |
| import org.apache.iotdb.tsfile.file.metadata.ChunkMetadata; |
| import org.apache.iotdb.tsfile.file.metadata.IChunkMetadata; |
| import org.apache.iotdb.tsfile.file.metadata.IDeviceID; |
| import org.apache.iotdb.tsfile.file.metadata.ITimeSeriesMetadata; |
| import org.apache.iotdb.tsfile.file.metadata.TimeseriesMetadata; |
| import org.apache.iotdb.tsfile.file.metadata.TsFileMetadata; |
| import org.apache.iotdb.tsfile.file.metadata.enums.TSDataType; |
| import org.apache.iotdb.tsfile.read.TsFileSequenceReader; |
| import org.apache.iotdb.tsfile.read.TsFileSequenceReader.LocateStatus; |
| import org.apache.iotdb.tsfile.read.common.Path; |
| import org.apache.iotdb.tsfile.read.common.TimeRange; |
| |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.Collections; |
| import java.util.HashMap; |
| import java.util.HashSet; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Map.Entry; |
| import java.util.Set; |
| import java.util.TreeMap; |
| |
| public class MetadataQuerierByFileImpl implements IMetadataQuerier { |
| |
| // number of cache entries (path -> List<ChunkMetadata>) |
| private static final int CACHED_ENTRY_NUMBER = 1000; |
| |
| private TsFileMetadata fileMetaData; |
| |
| // TimeseriesPath -> List<IChunkMetadata> |
| private LRUCache<Path, List<IChunkMetadata>> chunkMetaDataCache; |
| |
| private TsFileSequenceReader tsFileReader; |
| |
| /** Constructor of MetadataQuerierByFileImpl. */ |
| public MetadataQuerierByFileImpl(TsFileSequenceReader tsFileReader) throws IOException { |
| this.tsFileReader = tsFileReader; |
| this.fileMetaData = tsFileReader.readFileMetadata(); |
| chunkMetaDataCache = |
| new LRUCache<Path, List<IChunkMetadata>>(CACHED_ENTRY_NUMBER) { |
| @Override |
| public List<IChunkMetadata> loadObjectByKey(Path key) throws IOException { |
| return loadChunkMetadata(key); |
| } |
| }; |
| } |
| |
| @Override |
| public List<IChunkMetadata> getChunkMetaDataList(Path timeseriesPath) throws IOException { |
| return new ArrayList<>(chunkMetaDataCache.get(timeseriesPath)); |
| } |
| |
| @Override |
| public Map<Path, List<IChunkMetadata>> getChunkMetaDataMap(List<Path> paths) throws IOException { |
| Map<Path, List<IChunkMetadata>> chunkMetaDatas = new HashMap<>(); |
| for (Path path : paths) { |
| if (!chunkMetaDatas.containsKey(path)) { |
| chunkMetaDatas.put(path, new ArrayList<>()); |
| } |
| chunkMetaDatas.get(path).addAll(getChunkMetaDataList(path)); |
| } |
| return chunkMetaDatas; |
| } |
| |
| @Override |
| public TsFileMetadata getWholeFileMetadata() { |
| return fileMetaData; |
| } |
| |
| @Override |
| @SuppressWarnings("squid:S3776") // Suppress high Cognitive Complexity warning |
| public void loadChunkMetaDatas(List<Path> paths) throws IOException { |
| // group measurements by device |
| TreeMap<IDeviceID, Set<String>> deviceMeasurementsMap = new TreeMap<>(); |
| for (Path path : paths) { |
| if (!deviceMeasurementsMap.containsKey(path.getIDeviceID())) { |
| deviceMeasurementsMap.put(path.getIDeviceID(), new HashSet<>()); |
| } |
| deviceMeasurementsMap.get(path.getIDeviceID()).add(path.getMeasurement()); |
| } |
| int count = 0; |
| boolean enough = false; |
| for (Map.Entry<IDeviceID, Set<String>> deviceMeasurements : deviceMeasurementsMap.entrySet()) { |
| if (enough) { |
| break; |
| } |
| IDeviceID selectedDevice = deviceMeasurements.getKey(); |
| Set<String> selectedMeasurements = deviceMeasurements.getValue(); |
| List<IDeviceID> devices = this.tsFileReader.getAllDevices(); |
| IDeviceID[] deviceNames = devices.toArray(new IDeviceID[0]); |
| if (Arrays.binarySearch(deviceNames, selectedDevice) < 0) { |
| continue; |
| } |
| |
| List<ITimeSeriesMetadata> timeseriesMetaDataList = |
| tsFileReader.readITimeseriesMetadata(selectedDevice, selectedMeasurements); |
| for (ITimeSeriesMetadata timeseriesMetadata : timeseriesMetaDataList) { |
| List<IChunkMetadata> chunkMetadataList = |
| tsFileReader.readIChunkMetaDataList(timeseriesMetadata); |
| String measurementId; |
| if (timeseriesMetadata instanceof AlignedTimeSeriesMetadata) { |
| measurementId = |
| ((AlignedTimeSeriesMetadata) timeseriesMetadata) |
| .getValueTimeseriesMetadataList() |
| .get(0) |
| .getMeasurementId(); |
| } else { |
| measurementId = ((TimeseriesMetadata) timeseriesMetadata).getMeasurementId(); |
| } |
| this.chunkMetaDataCache.put( |
| new Path(selectedDevice, measurementId, true), chunkMetadataList); |
| count += chunkMetadataList.size(); |
| if (count == CACHED_ENTRY_NUMBER) { |
| enough = true; |
| break; |
| } |
| } |
| } |
| } |
| |
| @Override |
| public TSDataType getDataType(Path path) throws IOException { |
| if (tsFileReader.getChunkMetadataList(path) == null |
| || tsFileReader.getChunkMetadataList(path).isEmpty()) { |
| return null; |
| } |
| return tsFileReader.getChunkMetadataList(path).get(0).getDataType(); |
| } |
| |
| private List<IChunkMetadata> loadChunkMetadata(Path path) throws IOException { |
| return tsFileReader.getIChunkMetadataList(path); |
| } |
| |
| @Override |
| @SuppressWarnings("squid:S3776") // Suppress high Cognitive Complexity warning |
| public List<TimeRange> convertSpace2TimePartition( |
| List<Path> paths, long spacePartitionStartPos, long spacePartitionEndPos) throws IOException { |
| if (spacePartitionStartPos > spacePartitionEndPos) { |
| throw new IllegalArgumentException( |
| "'spacePartitionStartPos' should not be larger than 'spacePartitionEndPos'."); |
| } |
| |
| // (1) get timeRangesInCandidates and timeRangesBeforeCandidates by iterating |
| // through the metadata |
| ArrayList<TimeRange> timeRangesInCandidates = new ArrayList<>(); |
| ArrayList<TimeRange> timeRangesBeforeCandidates = new ArrayList<>(); |
| |
| // group measurements by device |
| |
| TreeMap<IDeviceID, Set<String>> deviceMeasurementsMap = new TreeMap<>(); |
| for (Path path : paths) { |
| deviceMeasurementsMap |
| .computeIfAbsent(path.getIDeviceID(), key -> new HashSet<>()) |
| .add(path.getMeasurement()); |
| } |
| for (Map.Entry<IDeviceID, Set<String>> deviceMeasurements : deviceMeasurementsMap.entrySet()) { |
| IDeviceID selectedDevice = deviceMeasurements.getKey(); |
| Set<String> selectedMeasurements = deviceMeasurements.getValue(); |
| |
| // measurement -> ChunkMetadata list |
| Map<String, List<ChunkMetadata>> seriesMetadatas = |
| tsFileReader.readChunkMetadataInDevice(selectedDevice); |
| |
| for (Entry<String, List<ChunkMetadata>> seriesMetadata : seriesMetadatas.entrySet()) { |
| |
| if (!selectedMeasurements.contains(seriesMetadata.getKey())) { |
| continue; |
| } |
| |
| for (IChunkMetadata chunkMetadata : seriesMetadata.getValue()) { |
| LocateStatus location = |
| checkLocateStatus(chunkMetadata, spacePartitionStartPos, spacePartitionEndPos); |
| if (location == LocateStatus.AFTER) { |
| break; |
| } |
| |
| if (location == LocateStatus.IN) { |
| timeRangesInCandidates.add( |
| new TimeRange(chunkMetadata.getStartTime(), chunkMetadata.getEndTime())); |
| } else { |
| timeRangesBeforeCandidates.add( |
| new TimeRange(chunkMetadata.getStartTime(), chunkMetadata.getEndTime())); |
| } |
| } |
| } |
| } |
| |
| // (2) sort and merge the timeRangesInCandidates |
| ArrayList<TimeRange> timeRangesIn = |
| new ArrayList<>(TimeRange.sortAndMerge(timeRangesInCandidates)); |
| if (timeRangesIn.isEmpty()) { |
| return Collections.emptyList(); // return an empty list |
| } |
| |
| // (3) sort and merge the timeRangesBeforeCandidates |
| ArrayList<TimeRange> timeRangesBefore = |
| new ArrayList<>(TimeRange.sortAndMerge(timeRangesBeforeCandidates)); |
| |
| // (4) calculate the remaining time ranges |
| List<TimeRange> resTimeRanges = new ArrayList<>(); |
| for (TimeRange in : timeRangesIn) { |
| ArrayList<TimeRange> remains = new ArrayList<>(in.getRemains(timeRangesBefore)); |
| resTimeRanges.addAll(remains); |
| } |
| |
| return resTimeRanges; |
| } |
| |
| /** |
| * Check the location of a given chunkGroupMetaData with respect to a space partition constraint. |
| * |
| * @param chunkMetaData the given chunkMetaData |
| * @param spacePartitionStartPos the start position of the space partition |
| * @param spacePartitionEndPos the end position of the space partition |
| * @return LocateStatus |
| */ |
| public static LocateStatus checkLocateStatus( |
| IChunkMetadata chunkMetaData, long spacePartitionStartPos, long spacePartitionEndPos) { |
| long startOffsetOfChunk = chunkMetaData.getOffsetOfChunkHeader(); |
| if (spacePartitionStartPos <= startOffsetOfChunk && startOffsetOfChunk < spacePartitionEndPos) { |
| return LocateStatus.IN; |
| } else if (startOffsetOfChunk < spacePartitionStartPos) { |
| return LocateStatus.BEFORE; |
| } else { |
| return LocateStatus.AFTER; |
| } |
| } |
| |
| @Override |
| public void clear() { |
| chunkMetaDataCache.clear(); |
| } |
| } |
