| /* |
| * 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; |
| |
| import org.apache.iotdb.db.queryengine.execution.fragment.QueryContext; |
| import org.apache.iotdb.db.queryengine.metric.SeriesScanCostMetricSet; |
| import org.apache.iotdb.db.storageengine.buffer.ChunkCache; |
| import org.apache.iotdb.db.storageengine.dataregion.tsfile.TsFileResource; |
| |
| import org.apache.tsfile.file.metadata.ChunkMetadata; |
| import org.apache.tsfile.file.metadata.IChunkMetadata; |
| import org.apache.tsfile.read.common.Chunk; |
| import org.apache.tsfile.read.controller.IChunkLoader; |
| import org.apache.tsfile.read.filter.basic.Filter; |
| import org.apache.tsfile.read.reader.IChunkReader; |
| import org.apache.tsfile.read.reader.chunk.ChunkReader; |
| |
| import java.io.IOException; |
| |
| import static org.apache.iotdb.db.queryengine.metric.SeriesScanCostMetricSet.INIT_CHUNK_READER_NONALIGNED_DISK; |
| |
| /** To read one chunk from disk, and only used in iotdb server module. */ |
| public class DiskChunkLoader implements IChunkLoader { |
| |
| private final QueryContext context; |
| |
| private final TsFileResource resource; |
| |
| private final boolean debug; |
| |
| public DiskChunkLoader(QueryContext context, TsFileResource resource) { |
| this.context = context; |
| this.debug = context.isDebug(); |
| this.resource = resource; |
| } |
| |
| @Override |
| public Chunk loadChunk(ChunkMetadata chunkMetaData) throws IOException { |
| return ChunkCache.getInstance() |
| .get( |
| new ChunkCache.ChunkCacheKey( |
| resource.getTsFilePath(), |
| resource.getTsFileID(), |
| chunkMetaData.getOffsetOfChunkHeader(), |
| resource.isClosed()), |
| chunkMetaData.getDeleteIntervalList(), |
| chunkMetaData.getStatistics(), |
| debug); |
| } |
| |
| @Override |
| public void close() { |
| // do nothing |
| } |
| |
| @Override |
| public IChunkReader getChunkReader(IChunkMetadata chunkMetaData, Filter globalTimeFilter) |
| throws IOException { |
| long t1 = System.nanoTime(); |
| try { |
| Chunk chunk = |
| ChunkCache.getInstance() |
| .get( |
| new ChunkCache.ChunkCacheKey( |
| resource.getTsFilePath(), |
| resource.getTsFileID(), |
| chunkMetaData.getOffsetOfChunkHeader(), |
| resource.isClosed()), |
| chunkMetaData.getDeleteIntervalList(), |
| chunkMetaData.getStatistics(), |
| debug); |
| |
| long t2 = System.nanoTime(); |
| IChunkReader chunkReader = new ChunkReader(chunk, globalTimeFilter); |
| SeriesScanCostMetricSet.getInstance() |
| .recordSeriesScanCost(INIT_CHUNK_READER_NONALIGNED_DISK, System.nanoTime() - t2); |
| |
| return chunkReader; |
| } finally { |
| long time = System.nanoTime() - t1; |
| context.getQueryStatistics().constructNonAlignedChunkReadersDiskCount.getAndAdd(1); |
| context.getQueryStatistics().constructNonAlignedChunkReadersDiskTime.getAndAdd(time); |
| } |
| } |
| } |