| /* |
| * 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.spark.bulkwriter.util; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.nio.file.Files; |
| import java.nio.file.Path; |
| import java.util.stream.Stream; |
| import java.util.zip.ZipEntry; |
| import java.util.zip.ZipOutputStream; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import net.jpountz.xxhash.StreamingXXHash32; |
| import net.jpountz.xxhash.XXHashFactory; |
| |
| public final class IOUtils |
| { |
| private static final Logger LOGGER = LoggerFactory.getLogger(IOUtils.class); |
| |
| private static final int HASH_BUFFER_SIZE = 512 * 1024; // 512KiB |
| |
| private IOUtils() |
| { |
| throw new UnsupportedOperationException("Cannot instantiate utility class"); |
| } |
| |
| /** |
| * Zip the files under source path. It doest not zip recursively. |
| * @param sourcePath directory that contains files to be zipped |
| * @param targetPath output zip file path |
| * @return compressed size, i.e. the size of the zip file |
| * @throws IOException I/O exception during zipping |
| */ |
| public static long zip(Path sourcePath, Path targetPath) throws IOException |
| { |
| return zip(sourcePath, targetPath, 1); |
| } |
| |
| /** |
| * Zip the files under source path. The files within the maxDepth directory levels are considered. |
| * @param sourcePath directory that contains files to be zipped |
| * @param targetPath output zip file path |
| * @param maxDepth the maximum number of directory levels to visit |
| * @return compressed size, i.e. the size of the zip file |
| * @throws IOException I/O exception during zipping |
| */ |
| public static long zip(Path sourcePath, Path targetPath, int maxDepth) throws IOException |
| { |
| if (!Files.isDirectory(sourcePath)) |
| { |
| throw new IOException("Not a directory. sourcePath: " + sourcePath); |
| } |
| |
| try (ZipOutputStream zos = new ZipOutputStream(Files.newOutputStream(targetPath)); |
| Stream<Path> stream = Files.walk(sourcePath, maxDepth)) |
| { |
| stream.filter(Files::isRegularFile) |
| .forEach(path -> { |
| ZipEntry zipEntry = new ZipEntry(sourcePath.relativize(path).toString()); |
| try |
| { |
| zos.putNextEntry(zipEntry); |
| Files.copy(path, zos); |
| zos.closeEntry(); |
| } |
| catch (IOException e) |
| { |
| LOGGER.error("Unexpected error while zipping SSTable components, path = {} not zipped, ", |
| path, e); |
| throw new RuntimeException(e); |
| } |
| }); |
| } |
| return targetPath.toFile().length(); |
| } |
| |
| /** |
| * Calculate the checksum of the file using the specified buffer size |
| * @param path file |
| * @param bufferSize buffer size for file content to calculate checksum |
| * @return checksum string |
| * @throws IOException I/O exception during checksum calculation |
| */ |
| public static String xxhash32(Path path, int bufferSize) throws IOException |
| { |
| XXHashFactory factory = XXHashFactory.safeInstance(); |
| try (InputStream inputStream = Files.newInputStream(path); |
| StreamingXXHash32 hasher = factory.newStreamingHash32(0)) |
| { |
| int len; |
| byte[] buffer = new byte[bufferSize]; |
| while ((len = inputStream.read(buffer)) != -1) |
| { |
| hasher.update(buffer, 0, len); |
| } |
| return Integer.toHexString(hasher.getValue()); |
| } |
| } |
| |
| /** |
| * Calculate the checksum of the file using the default buffer size |
| * @param path file |
| * @return checksum string |
| * @throws IOException I/O exception during checksum calculation |
| */ |
| public static String xxhash32(Path path) throws IOException |
| { |
| return xxhash32(path, HASH_BUFFER_SIZE); |
| } |
| } |