akashrn5 commented on a change in pull request #4005: URL: https://github.com/apache/carbondata/pull/4005#discussion_r531365242
########## File path: core/src/main/java/org/apache/carbondata/core/util/CleanFilesUtil.java ########## @@ -0,0 +1,179 @@ +/* + * 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.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.metadata.SegmentFileStore; +import org.apache.carbondata.core.metadata.schema.table.CarbonTable; +import org.apache.carbondata.core.statusmanager.LoadMetadataDetails; +import org.apache.carbondata.core.statusmanager.SegmentStatus; +import org.apache.carbondata.core.statusmanager.SegmentStatusManager; +import org.apache.carbondata.core.util.path.CarbonTablePath; + +import org.apache.hadoop.fs.Path; +import org.apache.log4j.Logger; + +/** + * Mantains the clean files command in carbondata. This class has methods for clean files + * operation. + */ +public class CleanFilesUtil { + + private static final Logger LOGGER = + LogServiceFactory.getLogService(CleanFilesUtil.class.getName()); + + /** + * This method will clean all the stale segments for a table, delete the source folder after + * copying the data to the trash and also remove the .segment files of the stale segments + */ + public static void cleanStaleSegments(CarbonTable carbonTable) + throws IOException { + long timeStampForTrashFolder = System.currentTimeMillis(); + List<String> staleSegments = getStaleSegments(carbonTable); + if (staleSegments.size() > 0) { + for (String staleSegment : staleSegments) { + String segmentNumber = staleSegment.split(CarbonCommonConstants.UNDERSCORE)[0]; + SegmentFileStore fileStore = new SegmentFileStore(carbonTable.getTablePath(), + staleSegment); + Map<String, SegmentFileStore.FolderDetails> locationMap = fileStore.getSegmentFile() + .getLocationMap(); + if (locationMap != null) { + CarbonFile segmentLocation = FileFactory.getCarbonFile(carbonTable.getTablePath() + + CarbonCommonConstants.FILE_SEPARATOR + fileStore.getSegmentFile().getLocationMap() + .entrySet().iterator().next().getKey()); + // copy the complete segment to the trash folder + TrashUtil.copySegmentToTrash(segmentLocation, CarbonTablePath.getTrashFolderPath( + carbonTable.getTablePath()) + CarbonCommonConstants.FILE_SEPARATOR + + timeStampForTrashFolder + CarbonCommonConstants.FILE_SEPARATOR + CarbonTablePath + .SEGMENT_PREFIX + segmentNumber); + // Deleting the stale Segment folders. + try { + CarbonUtil.deleteFoldersAndFiles(segmentLocation); + } catch (IOException | InterruptedException e) { + LOGGER.error("Unable to delete the segment: " + segmentNumber + " from after moving" + + " it to the trash folder : " + e.getMessage(), e); + } + // delete the segment file as well + FileFactory.deleteFile(CarbonTablePath.getSegmentFilePath(carbonTable.getTablePath(), + staleSegment)); + } + } + staleSegments.clear(); + } + } + + /** + * This method will clean all the stale segments for partition table, delete the source folders + * after copying the data to the trash and also remove the .segment files of the stale segments + */ + public static void cleanStaleSegmentsForPartitionTable(CarbonTable carbonTable) + throws IOException { + long timeStampForTrashFolder = System.currentTimeMillis(); + List<String> staleSegments = getStaleSegments(carbonTable); + if (staleSegments.size() > 0) { + for (String staleSegment : staleSegments) { + String segmentNumber = staleSegment.split(CarbonCommonConstants.UNDERSCORE)[0]; + // for each segment we get the indexfile first, then we get the carbondata file. Move both + // of those to trash folder + List<CarbonFile> filesToDelete = new ArrayList<>(); + SegmentFileStore fileStore = new SegmentFileStore(carbonTable.getTablePath(), + staleSegment); + List<String> indexOrMergeFiles = fileStore.readIndexFiles(SegmentStatus.SUCCESS, true, Review comment: here read index files method reading the file footer also, which is not required for your use, it will add extra time and IO which is unnecessary in this scenario, so please check for other APIs and just get the indexfilenames you need without doing any extra operations. ---------------------------------------------------------------- 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
