qiaojialin commented on a change in pull request #258: [IOTDB-143]Development of merge URL: https://github.com/apache/incubator-iotdb/pull/258#discussion_r313734754
########## File path: server/src/main/java/org/apache/iotdb/db/utils/MergeUtils.java ########## @@ -0,0 +1,354 @@ +/** + * 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.utils; + +import java.io.IOException; +import java.util.ArrayList; +import java.util.Collections; +import java.util.Comparator; +import java.util.HashSet; +import java.util.List; +import java.util.Map; +import java.util.PriorityQueue; +import java.util.Set; +import org.apache.iotdb.db.engine.merge.manage.MergeResource; +import org.apache.iotdb.db.engine.modification.Modification; +import org.apache.iotdb.db.engine.storagegroup.TsFileResource; +import org.apache.iotdb.tsfile.file.metadata.ChunkMetaData; +import org.apache.iotdb.tsfile.file.metadata.TsDeviceMetadataIndex; +import org.apache.iotdb.tsfile.file.metadata.TsFileMetaData; +import org.apache.iotdb.tsfile.read.TsFileSequenceReader; +import org.apache.iotdb.tsfile.read.common.BatchData; +import org.apache.iotdb.tsfile.read.common.Chunk; +import org.apache.iotdb.tsfile.read.common.Path; +import org.apache.iotdb.tsfile.read.reader.chunk.ChunkReader; +import org.apache.iotdb.tsfile.read.reader.chunk.ChunkReaderWithoutFilter; +import org.apache.iotdb.tsfile.write.chunk.IChunkWriter; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +public class MergeUtils { + + private static final Logger logger = LoggerFactory.getLogger(MergeUtils.class); + + private MergeUtils() { + // util class + } + + public static void writeTVPair(TimeValuePair timeValuePair, IChunkWriter chunkWriter) { + switch (chunkWriter.getDataType()) { + case TEXT: + chunkWriter.write(timeValuePair.getTimestamp(), timeValuePair.getValue().getBinary()); + break; + case DOUBLE: + chunkWriter.write(timeValuePair.getTimestamp(), timeValuePair.getValue().getDouble()); + break; + case BOOLEAN: + chunkWriter.write(timeValuePair.getTimestamp(), timeValuePair.getValue().getBoolean()); + break; + case INT64: + chunkWriter.write(timeValuePair.getTimestamp(), timeValuePair.getValue().getLong()); + break; + case INT32: + chunkWriter.write(timeValuePair.getTimestamp(), timeValuePair.getValue().getInt()); + break; + case FLOAT: + chunkWriter.write(timeValuePair.getTimestamp(), timeValuePair.getValue().getFloat()); + break; + default: + throw new UnsupportedOperationException("Unknown data type " + chunkWriter.getDataType()); + } + } + + /** + * Collect all paths contained in the all SeqFiles and UnseqFiles in a merge and sort them + * before return. + * @param resource + * @return all paths contained in the merge. + * @throws IOException + */ + public static List<Path> collectPaths(MergeResource resource) + throws IOException { + Set<Path> pathSet = new HashSet<>(); + for (TsFileResource tsFileResource : resource.getUnseqFiles()) { + TsFileSequenceReader sequenceReader = resource.getFileReader(tsFileResource); + resource.getMeasurementSchemaMap().putAll(sequenceReader.readFileMetadata().getMeasurementSchema()); + pathSet.addAll(collectFileSeries(sequenceReader)); + } + for (TsFileResource tsFileResource : resource.getSeqFiles()) { + TsFileSequenceReader sequenceReader = resource.getFileReader(tsFileResource); + resource.getMeasurementSchemaMap().putAll(sequenceReader.readFileMetadata().getMeasurementSchema()); + pathSet.addAll(collectFileSeries(sequenceReader)); + } + List<Path> ret = new ArrayList<>(pathSet); + ret.sort(Comparator.comparing(Path::getFullPath)); + return ret; + } + + private static List<Path> collectFileSeries(TsFileSequenceReader sequenceReader) throws IOException { + TsFileMetaData metaData = sequenceReader.readFileMetadata(); + Set<String> deviceIds = metaData.getDeviceMap().keySet(); + Set<String> measurements = metaData.getMeasurementSchema().keySet(); + List<Path> paths = new ArrayList<>(); + for (String deviceId : deviceIds) { + for (String measurement : measurements) { + paths.add(new Path(deviceId, measurement)); Review comment: this may produce non-exist series in this file, some check may be needed ---------------------------------------------------------------- This is an automated message from the Apache Git Service. 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