| /* |
| * 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.read.reader.chunk.metadata; |
| |
| import org.apache.iotdb.commons.path.PartialPath; |
| import org.apache.iotdb.db.queryengine.execution.fragment.QueryContext; |
| import org.apache.iotdb.db.queryengine.metric.SeriesScanCostMetricSet; |
| import org.apache.iotdb.db.storageengine.dataregion.memtable.ReadOnlyMemChunk; |
| import org.apache.iotdb.db.storageengine.dataregion.read.reader.chunk.DiskChunkLoader; |
| import org.apache.iotdb.db.storageengine.dataregion.tsfile.TsFileResource; |
| |
| import org.apache.tsfile.file.metadata.IChunkMetadata; |
| import org.apache.tsfile.file.metadata.ITimeSeriesMetadata; |
| import org.apache.tsfile.read.controller.IChunkMetadataLoader; |
| import org.apache.tsfile.read.filter.basic.Filter; |
| |
| import java.util.List; |
| |
| import static org.apache.iotdb.db.queryengine.metric.SeriesScanCostMetricSet.CHUNK_METADATA_FILTER_NONALIGNED_MEM; |
| import static org.apache.iotdb.db.queryengine.metric.SeriesScanCostMetricSet.LOAD_CHUNK_METADATA_LIST_NONALIGNED_MEM; |
| |
| public class MemChunkMetadataLoader implements IChunkMetadataLoader { |
| |
| private final TsFileResource resource; |
| private final PartialPath seriesPath; |
| private final QueryContext context; |
| private final Filter globalTimeFilter; |
| |
| private static final SeriesScanCostMetricSet SERIES_SCAN_COST_METRIC_SET = |
| SeriesScanCostMetricSet.getInstance(); |
| |
| public MemChunkMetadataLoader( |
| TsFileResource resource, |
| PartialPath seriesPath, |
| QueryContext context, |
| Filter globalTimeFilter) { |
| this.resource = resource; |
| this.seriesPath = seriesPath; |
| this.context = context; |
| this.globalTimeFilter = globalTimeFilter; |
| } |
| |
| @Override |
| public List<IChunkMetadata> loadChunkMetadataList(ITimeSeriesMetadata timeSeriesMetadata) { |
| long t1 = System.nanoTime(); |
| try { |
| // There is no need to apply modifications to these, because we already do that while |
| // generating it in TSP |
| List<IChunkMetadata> chunkMetadataList = resource.getChunkMetadataList(seriesPath); |
| |
| // it is ok, even if it is not thread safe, because the cost of creating a DiskChunkLoader is |
| // very cheap. |
| chunkMetadataList.forEach( |
| chunkMetadata -> { |
| if (chunkMetadata.needSetChunkLoader()) { |
| chunkMetadata.setVersion(resource.getVersion()); |
| chunkMetadata.setClosed(resource.isClosed()); |
| chunkMetadata.setChunkLoader(new DiskChunkLoader(context, resource)); |
| } |
| }); |
| |
| List<ReadOnlyMemChunk> memChunks = resource.getReadOnlyMemChunk(seriesPath); |
| if (memChunks != null) { |
| for (ReadOnlyMemChunk readOnlyMemChunk : memChunks) { |
| if (!readOnlyMemChunk.isEmpty()) { |
| chunkMetadataList.add(readOnlyMemChunk.getChunkMetaData()); |
| } |
| } |
| } |
| |
| // when chunkMetadataList.size() == 1, it means that the chunk statistics is same as |
| // the time series metadata, so we don't need to filter it again. |
| if (chunkMetadataList.size() > 1) { |
| // remove not satisfied ChunkMetaData |
| long t2 = System.nanoTime(); |
| chunkMetadataList.removeIf( |
| chunkMetaData -> |
| (globalTimeFilter != null && globalTimeFilter.canSkip(chunkMetaData)) |
| || chunkMetaData.getStartTime() > chunkMetaData.getEndTime()); |
| SERIES_SCAN_COST_METRIC_SET.recordSeriesScanCost( |
| CHUNK_METADATA_FILTER_NONALIGNED_MEM, System.nanoTime() - t2); |
| } |
| |
| for (IChunkMetadata metadata : chunkMetadataList) { |
| metadata.setVersion(resource.getVersion()); |
| } |
| return chunkMetadataList; |
| } finally { |
| SERIES_SCAN_COST_METRIC_SET.recordSeriesScanCost( |
| LOAD_CHUNK_METADATA_LIST_NONALIGNED_MEM, System.nanoTime() - t1); |
| } |
| } |
| } |