vikramahuja1001 commented on a change in pull request #4005: URL: https://github.com/apache/carbondata/pull/4005#discussion_r527484205
########## File path: core/src/main/java/org/apache/carbondata/core/util/CleanFilesUtil.java ########## @@ -0,0 +1,321 @@ +/* + * 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.carbondata.core.util; + +import java.io.IOException; +import java.sql.Timestamp; +import java.util.*; + +import org.apache.carbondata.common.logging.LogServiceFactory; +import org.apache.carbondata.core.constants.CarbonCommonConstants; +import org.apache.carbondata.core.datastore.filesystem.CarbonFile; +import org.apache.carbondata.core.datastore.impl.FileFactory; +import org.apache.carbondata.core.locks.CarbonLockFactory; +import org.apache.carbondata.core.locks.CarbonLockUtil; +import org.apache.carbondata.core.locks.ICarbonLock; +import org.apache.carbondata.core.locks.LockUsage; +import org.apache.carbondata.core.metadata.SegmentFileStore; +import org.apache.carbondata.core.metadata.schema.table.CarbonTable; +import org.apache.carbondata.core.statusmanager.LoadMetadataDetails; +import org.apache.carbondata.core.statusmanager.SegmentStatusManager; +import org.apache.carbondata.core.util.path.CarbonTablePath; + +import org.apache.log4j.Logger; + +public class CleanFilesUtil { + + private static final Logger LOGGER = + LogServiceFactory.getLogService(CarbonUtil.class.getName()); + private static List<CarbonFile> filesInPartitionFolder = new ArrayList<CarbonFile>(); + + /** + * + * This method will clean the stale segments and move them to the trash folder. + */ + public static void cleanStaleSegmentsNonPartitionTable(CarbonTable carbonTable) + throws IOException { + String metaDataLocation = carbonTable.getMetadataPath(); + String partitionPath = CarbonTablePath.getPartitionDir(carbonTable.getTablePath()); + String timeStampForTrashFolder = String.valueOf(new Timestamp(System.currentTimeMillis()) + .getTime()); + if (FileFactory.isFileExist(partitionPath)) { + // list all segments before reading tablestatus file. + CarbonFile[] allSegments = FileFactory.getCarbonFile(partitionPath).listFiles(); + // there is no segment + if (allSegments == null || allSegments.length == 0) { + return; + } + int retryCount = CarbonLockUtil + .getLockProperty(CarbonCommonConstants.NUMBER_OF_TRIES_FOR_CONCURRENT_LOCK, + CarbonCommonConstants.NUMBER_OF_TRIES_FOR_CONCURRENT_LOCK_DEFAULT); + int maxTimeout = CarbonLockUtil + .getLockProperty(CarbonCommonConstants.MAX_TIMEOUT_FOR_CONCURRENT_LOCK, + CarbonCommonConstants.MAX_TIMEOUT_FOR_CONCURRENT_LOCK_DEFAULT); + ICarbonLock carbonTableStatusLock = CarbonLockFactory + .getCarbonLockObj(carbonTable.getAbsoluteTableIdentifier(), LockUsage.TABLE_STATUS_LOCK); + try { + if (carbonTableStatusLock.lockWithRetries(retryCount, maxTimeout)) { + LoadMetadataDetails[] details = SegmentStatusManager.readLoadMetadata(metaDataLocation); + // there is no segment or failed to read tablestatus file. + // so it should stop immediately. + // Do not stop if the tablestatus file does not exist, it can have stale segments. + if (FileFactory.getCarbonFile(carbonTable.getMetadataPath() + CarbonCommonConstants + .FILE_SEPARATOR + CarbonTablePath.TABLE_STATUS_FILE).exists() && (details == null + || details.length == 0)) { + return; + } + HashMap<CarbonFile, String> staleSegments = getStaleSegmentsNormalTable(details, + allSegments); + // move these segments one by one to the trash folder + for (Map.Entry<CarbonFile, String> entry : staleSegments.entrySet()) { + TrashUtil.copySegmentToTrash(entry.getKey(), carbonTable.getTablePath(), + timeStampForTrashFolder + CarbonCommonConstants.FILE_SEPARATOR + + CarbonCommonConstants.LOAD_FOLDER + entry.getValue()); + LOGGER.info("Deleting Segment: " + entry.getKey().getAbsolutePath()); + try { + CarbonUtil.deleteFoldersAndFiles(entry.getKey()); + LOGGER.info("Deleting Segment: " + entry.getKey()); + } catch (IOException | InterruptedException e) { + LOGGER.error("Unable to delete the given path :: " + e.getMessage(), e); + } + } + if (staleSegments.size() > 0) { + // get the segment metadata path + String segmentFilesLocation = + CarbonTablePath.getSegmentFilesLocation(carbonTable.getTablePath()); + // delete the segment metadata files also + CarbonFile[] staleSegmentMetadataFiles = FileFactory.getCarbonFile(segmentFilesLocation) + .listFiles(file -> (staleSegments.containsValue(file.getName() + .split(CarbonCommonConstants.UNDERSCORE)[0]))); + for (CarbonFile staleSegmentMetadataFile : staleSegmentMetadataFiles) { + staleSegmentMetadataFile.delete(); + } + } + } else { + String errorMessage = + "Not able to acquire the Table status lock for cleaning stale segments for table " + + carbonTable.getDatabaseName() + "." + carbonTable.getTableName(); + LOGGER.error(errorMessage); + } + } finally { + carbonTableStatusLock.unlock(); + } + } + } + + /** + * + * This method will copy data files for partition table to the trash folder, file by file. + */ + public static List<String> copyPartitionTableFilesToTrash(String segmentFile, + String timeStampForTrashFolder, String segmentNo, CarbonTable carbonTable, + String indexMergeFile) throws IOException { + // search for indexMergeFile everywhere and segmentFile in the carbondata file and + // copy to trash folder + List<String> filesToDelete = new ArrayList<>(); + for (CarbonFile fileList : filesInPartitionFolder) { + String nameofFile = fileList.getName().replace(CarbonCommonConstants.HYPHEN, + CarbonCommonConstants.UNDERSCORE); + String nameOfSegment = segmentFile.substring(0, segmentFile.indexOf( + CarbonCommonConstants.POINT)); + String partitionValue = fileList.getAbsolutePath().split(CarbonCommonConstants + .FILE_SEPARATOR)[fileList.getAbsolutePath().split(CarbonCommonConstants + .FILE_SEPARATOR).length - 2]; + if (fileList.getName().equals(indexMergeFile)) { + TrashUtil.copyFileToTrashFolder(carbonTable.getTablePath(), + fileList.getAbsolutePath(), timeStampForTrashFolder + CarbonCommonConstants + .FILE_SEPARATOR + CarbonCommonConstants.LOAD_FOLDER + segmentNo + + CarbonCommonConstants.FILE_SEPARATOR + partitionValue); + filesToDelete.add(fileList.getAbsolutePath()); + } else if (nameofFile.contains(nameOfSegment) && fileList.getName().endsWith( + CarbonTablePath.INDEX_FILE_EXT)) { + TrashUtil.copyFileToTrashFolder(carbonTable.getTablePath(), + fileList.getAbsolutePath(), timeStampForTrashFolder + CarbonCommonConstants + .FILE_SEPARATOR + CarbonCommonConstants.LOAD_FOLDER + segmentNo + + CarbonCommonConstants.FILE_SEPARATOR + partitionValue); + filesToDelete.add(fileList.getAbsolutePath()); + } else if (nameofFile.contains(nameOfSegment) && fileList.getName().endsWith( + CarbonCommonConstants.FACT_FILE_EXT)) { + // carbondata file found + TrashUtil.copyFileToTrashFolder(carbonTable.getTablePath(), fileList + .getAbsolutePath(), timeStampForTrashFolder + CarbonCommonConstants + .FILE_SEPARATOR + CarbonCommonConstants.LOAD_FOLDER + segmentNo + + CarbonCommonConstants.FILE_SEPARATOR + partitionValue); + filesToDelete.add(fileList.getAbsolutePath()); + } + } + return filesToDelete; + } + + /** + * + * This method will find all the stale segments in normal table flow. + */ + public static HashMap<CarbonFile, String> getStaleSegmentsNormalTable(LoadMetadataDetails[] + details, CarbonFile[] allSegments) { + Set<String> metadataSet = new HashSet<>(details.length); + for (LoadMetadataDetails detail : details) { + metadataSet.add(detail.getLoadName()); + } + HashMap<CarbonFile, String> staleSegments = new HashMap<>(allSegments.length); + for (CarbonFile segment : allSegments) { + String segmentName = segment.getName(); + // check segment folder pattern + if (segmentName.startsWith(CarbonTablePath.SEGMENT_PREFIX)) { + String[] parts = segmentName.split(CarbonCommonConstants.UNDERSCORE); + if (parts.length == 2) { + boolean isOriginal = !parts[1].contains("."); + // in loading flow, + // it should be original segment and segment metadata doesn't exists + if (isOriginal && !metadataSet.contains(parts[1])) { + staleSegments.put(segment, parts[1]); + } + } + } + } + return staleSegments; + } + + /** + * + * This method will find all the stale segments for partition table flow. + */ + public static List<String> getStaleSegmentsPartitionTable(LoadMetadataDetails[] details, + Map<String, String> detailName, CarbonFile[] allSegment) { + List<String> staleSegments = new ArrayList<>(); + for (CarbonFile file : allSegment) { Review comment: worng way. add only whatever is stale ---------------------------------------------------------------- This is an automated message from the Apache Git Service. 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