| /* |
| * 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.accumulo.core.volume; |
| |
| import static java.util.Objects.requireNonNull; |
| |
| import java.io.IOException; |
| import java.util.Objects; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.fs.FileSystem; |
| import org.apache.hadoop.fs.Path; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * Basic Volume implementation that contains a FileSystem and a base path that should be used within |
| * that filesystem. |
| */ |
| public class VolumeImpl implements Volume { |
| |
| private static final Logger log = LoggerFactory.getLogger(VolumeImpl.class); |
| |
| private final FileSystem fs; |
| private final String basePath; |
| private final Configuration hadoopConf; |
| |
| public VolumeImpl(Path path, Configuration hadoopConf) throws IOException { |
| this.fs = requireNonNull(path).getFileSystem(requireNonNull(hadoopConf)); |
| this.basePath = stripTrailingSlashes(path.toUri().getPath()); |
| this.hadoopConf = hadoopConf; |
| } |
| |
| public VolumeImpl(FileSystem fs, String basePath) { |
| this.fs = requireNonNull(fs); |
| this.basePath = stripTrailingSlashes(requireNonNull(basePath)); |
| this.hadoopConf = fs.getConf(); |
| } |
| |
| // remove any trailing whitespace or slashes |
| private static String stripTrailingSlashes(String path) { |
| return path.strip().replaceAll("/*$", ""); |
| } |
| |
| @Override |
| public FileSystem getFileSystem() { |
| return fs; |
| } |
| |
| @Override |
| public String getBasePath() { |
| return basePath; |
| } |
| |
| @Override |
| public boolean containsPath(Path path) { |
| FileSystem otherFS; |
| try { |
| otherFS = requireNonNull(path).getFileSystem(hadoopConf); |
| } catch (IOException e) { |
| log.warn("Could not determine filesystem from path: {}", path, e); |
| return false; |
| } |
| return equivalentFileSystems(otherFS) && isAncestorPathOf(path); |
| } |
| |
| // same if the only difference is trailing slashes |
| boolean equivalentFileSystems(FileSystem otherFS) { |
| return stripTrailingSlashes(fs.getUri().toString()) |
| .equals(stripTrailingSlashes(otherFS.getUri().toString())); |
| } |
| |
| // is ancestor if the path portion without the filesystem scheme |
| // is a subdirectory of this volume's basePath |
| boolean isAncestorPathOf(Path other) { |
| String otherPath = other.toUri().getPath().strip(); |
| if (otherPath.startsWith(basePath)) { |
| String otherRemainingPath = otherPath.substring(basePath.length()); |
| return otherRemainingPath.isEmpty() |
| || (otherRemainingPath.startsWith("/") && !otherRemainingPath.contains("..")); |
| } |
| return false; |
| } |
| |
| @Override |
| public int hashCode() { |
| return Objects.hashCode(getFileSystem()) + Objects.hashCode(getBasePath()); |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| if (o instanceof VolumeImpl) { |
| VolumeImpl other = (VolumeImpl) o; |
| return getFileSystem().equals(other.getFileSystem()) |
| && getBasePath().equals(other.getBasePath()); |
| } |
| |
| return false; |
| } |
| |
| @Override |
| public String toString() { |
| return fs.makeQualified(new Path(basePath)).toString(); |
| } |
| |
| @Override |
| public Path prefixChild(String pathString) { |
| String p = requireNonNull(pathString).strip(); |
| p = p.startsWith("/") ? p.substring(1) : p; |
| String reason; |
| if (basePath.isBlank()) { |
| log.error("Basepath is empty. Make sure instance.volumes is set to a correct path"); |
| throw new IllegalArgumentException( |
| "Accumulo cannot be initialized because basepath is empty. " |
| + "This probably means instace.volumes is an incorrect value"); |
| } |
| |
| if (p.isBlank()) { |
| return fs.makeQualified(new Path(basePath)); |
| } else if (p.startsWith("/")) { |
| // check for starting with '//' |
| reason = "absolute path"; |
| } else if (pathString.contains(":")) { |
| reason = "qualified path"; |
| } else if (pathString.contains("..")) { |
| reason = "path contains '..'"; |
| } else { |
| return fs.makeQualified(new Path(basePath, p)); |
| } |
| throw new IllegalArgumentException( |
| String.format("Cannot prefix %s (%s) with volume %s", pathString, reason, this)); |
| } |
| |
| } |