| /* |
| * 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.cassandra.db; |
| |
| import java.io.BufferedReader; |
| import java.io.File; |
| import java.io.FileReader; |
| import java.io.FileWriter; |
| import java.io.IOException; |
| import java.io.PrintWriter; |
| import java.nio.file.Files; |
| import java.nio.file.Paths; |
| |
| import com.google.common.annotations.VisibleForTesting; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import org.apache.cassandra.config.DatabaseDescriptor; |
| import org.apache.cassandra.io.util.FileUtils; |
| |
| |
| public class WindowsFailedSnapshotTracker |
| { |
| private static final Logger logger = LoggerFactory.getLogger(WindowsFailedSnapshotTracker.class); |
| private static PrintWriter _failedSnapshotFile; |
| |
| @VisibleForTesting |
| // Need to handle null for unit tests |
| public static final String TODELETEFILE = System.getenv("CASSANDRA_HOME") == null |
| ? ".toDelete" |
| : System.getenv("CASSANDRA_HOME") + File.separator + ".toDelete"; |
| |
| public static void deleteOldSnapshots() |
| { |
| if (new File(TODELETEFILE).exists()) |
| { |
| try |
| { |
| try (BufferedReader reader = new BufferedReader(new FileReader(TODELETEFILE))) |
| { |
| String snapshotDirectory; |
| while ((snapshotDirectory = reader.readLine()) != null) |
| { |
| File f = new File(snapshotDirectory); |
| |
| // Skip folders that aren't a subset of temp or a data folder. We don't want people to accidentally |
| // delete something important by virtue of adding something invalid to the .toDelete file. |
| boolean validFolder = FileUtils.isSubDirectory(new File(System.getenv("TEMP")), f); |
| for (String s : DatabaseDescriptor.getAllDataFileLocations()) |
| validFolder |= FileUtils.isSubDirectory(new File(s), f); |
| |
| if (!validFolder) |
| { |
| logger.warn("Skipping invalid directory found in .toDelete: {}. Only %TEMP% or data file subdirectories are valid.", f); |
| continue; |
| } |
| |
| // Could be a non-existent directory if deletion worked on previous JVM shutdown. |
| if (f.exists()) |
| { |
| logger.warn("Discovered obsolete snapshot. Deleting directory [{}]", snapshotDirectory); |
| FileUtils.deleteRecursive(new File(snapshotDirectory)); |
| } |
| } |
| } |
| |
| // Only delete the old .toDelete file if we succeed in deleting all our known bad snapshots. |
| Files.delete(Paths.get(TODELETEFILE)); |
| } |
| catch (IOException e) |
| { |
| logger.warn("Failed to open {}. Obsolete snapshots from previous runs will not be deleted.", TODELETEFILE, e); |
| } |
| } |
| |
| try |
| { |
| _failedSnapshotFile = new PrintWriter(new FileWriter(TODELETEFILE, true)); |
| } |
| catch (IOException e) |
| { |
| throw new RuntimeException(String.format("Failed to create failed snapshot tracking file [%s]. Aborting", TODELETEFILE)); |
| } |
| } |
| |
| public static synchronized void handleFailedSnapshot(File dir) |
| { |
| assert _failedSnapshotFile != null : "_failedSnapshotFile not initialized within WindowsFailedSnapshotTracker"; |
| FileUtils.deleteRecursiveOnExit(dir); |
| _failedSnapshotFile.println(dir.toString()); |
| _failedSnapshotFile.flush(); |
| } |
| |
| @VisibleForTesting |
| public static void resetForTests() |
| { |
| _failedSnapshotFile.close(); |
| } |
| } |