qiaojialin commented on a change in pull request #258: [IOTDB-143]Development of merge URL: https://github.com/apache/incubator-iotdb/pull/258#discussion_r314576210
########## File path: server/src/main/java/org/apache/iotdb/db/engine/merge/recover/LogAnalyzer.java ########## @@ -0,0 +1,295 @@ +/** + * 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.engine.merge.recover; + +import static org.apache.iotdb.db.engine.merge.recover.MergeLogger.*; + +import java.io.BufferedReader; +import java.io.File; +import java.io.FileReader; +import java.io.IOException; +import java.util.*; +import java.util.Map.Entry; +import org.apache.iotdb.db.engine.merge.manage.MergeResource; +import org.apache.iotdb.db.engine.merge.task.MergeTask; +import org.apache.iotdb.db.engine.storagegroup.TsFileResource; +import org.apache.iotdb.tsfile.read.common.Path; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +/** + * LogAnalyzer scans the "merge.log" file and recovers information such as files of last merge, + * the last available positions of each file and how many timeseries and files have been merged. + */ +public class LogAnalyzer { + + private static final Logger logger = LoggerFactory.getLogger(LogAnalyzer.class); + + private MergeResource resource; + private String taskName; + private File logFile; + + private Map<File, Long> fileLastPositions = new HashMap<>(); + private Map<File, Long> tempFileLastPositions = new HashMap<>(); + + private List<Path> mergedPaths = new ArrayList<>(); + private List<Path> unmergedPaths; + private List<TsFileResource> unmergedFiles; + private String currLine; + + private Status status; + + public LogAnalyzer(MergeResource resource, String taskName, File logFile) { + this.resource = resource; + this.taskName = taskName; + this.logFile = logFile; + } + + /** + * Scan through the logs to find out where the last merge has stopped and store the information + * about the progress in the fields. + * @return a Status indicating the completed stage of the last merge. + * @throws IOException + */ + public Status analyze() throws IOException { + status = Status.NONE; + try (BufferedReader bufferedReader = new BufferedReader(new FileReader(logFile))) { + currLine = bufferedReader.readLine(); + if (currLine != null) { + analyzeSeqFiles(bufferedReader); + + analyzeUnseqFiles(bufferedReader); + + analyzeUnmergedSeries(bufferedReader); + + analyzeMergedSeries(bufferedReader, unmergedPaths); + + analyzeMergedFiles(bufferedReader); + } + } + return status; + } + + private void analyzeUnmergedSeries(BufferedReader bufferedReader) throws IOException { + if (!STR_TIMESERIES.equals(currLine)) { + return; + } + long startTime = System.currentTimeMillis(); + List<Path> paths = new ArrayList<>(); + while ((currLine = bufferedReader.readLine()) != null) { + if (STR_MERGE_START.equals(currLine)) { + break; + } + paths.add(new Path(currLine)); + } + if (logger.isDebugEnabled()) { + logger.debug("{} found {} seq files after {}ms", taskName, paths.size(), + (System.currentTimeMillis() - startTime)); + } + unmergedPaths = paths; Review comment: allPathsToBeMerged? ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org With regards, Apache Git Services
