| /* |
| * 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.lifecycle; |
| |
| import java.io.File; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| import java.io.IOException; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import org.apache.cassandra.io.FSError; |
| import org.apache.cassandra.io.FSReadError; |
| import org.apache.cassandra.io.util.FileUtils; |
| import org.apache.cassandra.utils.FBUtilities; |
| import org.apache.cassandra.utils.NativeLibrary; |
| |
| /** |
| * Because a column family may have sstables on different disks and disks can |
| * be removed, we duplicate log files into many replicas so as to have a file |
| * in each directory where sstables exist. |
| * |
| * Each replica contains the exact same content but we do allow for final |
| * partial records in case we crashed after writing to one replica but |
| * before compliting the write to another replica. |
| * |
| * @see LogFile |
| */ |
| final class LogReplica implements AutoCloseable |
| { |
| private static final Logger logger = LoggerFactory.getLogger(LogReplica.class); |
| |
| private final File file; |
| private int directoryDescriptor; |
| private final Map<String, String> errors = new HashMap<>(); |
| |
| static LogReplica create(File directory, String fileName) |
| { |
| int folderFD = NativeLibrary.tryOpenDirectory(directory.getPath()); |
| if (folderFD == -1 && !FBUtilities.isWindows) |
| throw new FSReadError(new IOException(String.format("Invalid folder descriptor trying to create log replica %s", directory.getPath())), directory.getPath()); |
| |
| return new LogReplica(new File(fileName), folderFD); |
| } |
| |
| static LogReplica open(File file) |
| { |
| int folderFD = NativeLibrary.tryOpenDirectory(file.getParentFile().getPath()); |
| if (folderFD == -1 && !FBUtilities.isWindows) |
| throw new FSReadError(new IOException(String.format("Invalid folder descriptor trying to create log replica %s", file.getParentFile().getPath())), file.getParentFile().getPath()); |
| |
| return new LogReplica(file, folderFD); |
| } |
| |
| LogReplica(File file, int directoryDescriptor) |
| { |
| this.file = file; |
| this.directoryDescriptor = directoryDescriptor; |
| } |
| |
| File file() |
| { |
| return file; |
| } |
| |
| List<String> readLines() |
| { |
| return FileUtils.readLines(file); |
| } |
| |
| String getFileName() |
| { |
| return file.getName(); |
| } |
| |
| String getDirectory() |
| { |
| return file.getParent(); |
| } |
| |
| void append(LogRecord record) |
| { |
| boolean existed = exists(); |
| try |
| { |
| FileUtils.appendAndSync(file, record.toString()); |
| } |
| catch (FSError e) |
| { |
| logger.error("Failed to sync file {}", file, e); |
| FileUtils.handleFSErrorAndPropagate(e); |
| } |
| |
| // If the file did not exist before appending the first |
| // line, then sync the directory as well since now it must exist |
| if (!existed) |
| syncDirectory(); |
| } |
| |
| void syncDirectory() |
| { |
| try |
| { |
| if (directoryDescriptor >= 0) |
| NativeLibrary.trySync(directoryDescriptor); |
| } |
| catch (FSError e) |
| { |
| logger.error("Failed to sync directory descriptor {}", directoryDescriptor, e); |
| FileUtils.handleFSErrorAndPropagate(e); |
| } |
| } |
| |
| void delete() |
| { |
| LogTransaction.delete(file); |
| syncDirectory(); |
| } |
| |
| boolean exists() |
| { |
| return file.exists(); |
| } |
| |
| public void close() |
| { |
| if (directoryDescriptor >= 0) |
| { |
| NativeLibrary.tryCloseFD(directoryDescriptor); |
| directoryDescriptor = -1; |
| } |
| } |
| |
| @Override |
| public String toString() |
| { |
| return String.format("[%s] ", file); |
| } |
| |
| void setError(String line, String error) |
| { |
| errors.put(line, error); |
| } |
| |
| void printContentsWithAnyErrors(StringBuilder str) |
| { |
| str.append(file.getPath()); |
| str.append(System.lineSeparator()); |
| FileUtils.readLines(file).forEach(line -> printLineWithAnyError(str, line)); |
| } |
| |
| private void printLineWithAnyError(StringBuilder str, String line) |
| { |
| str.append('\t'); |
| str.append(line); |
| str.append(System.lineSeparator()); |
| |
| String error = errors.get(line); |
| if (error != null) |
| { |
| str.append("\t\t***"); |
| str.append(error); |
| str.append(System.lineSeparator()); |
| } |
| } |
| } |