| /** |
| * 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.hadoop.fs.s3; |
| |
| import java.io.BufferedInputStream; |
| import java.io.BufferedOutputStream; |
| import java.io.ByteArrayOutputStream; |
| import java.io.File; |
| import java.io.FileInputStream; |
| import java.io.FileOutputStream; |
| import java.io.IOException; |
| import java.net.URI; |
| import java.util.HashMap; |
| import java.util.LinkedHashSet; |
| import java.util.Map; |
| import java.util.Set; |
| import java.util.SortedMap; |
| import java.util.TreeMap; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.fs.s3.INode.FileType; |
| |
| /** |
| * A stub implementation of {@link FileSystemStore} for testing |
| * {@link S3FileSystem} without actually connecting to S3. |
| */ |
| class InMemoryFileSystemStore implements FileSystemStore { |
| |
| private Configuration conf; |
| private SortedMap<Path, INode> inodes = new TreeMap<Path, INode>(); |
| private Map<Long, byte[]> blocks = new HashMap<Long, byte[]>(); |
| |
| public void initialize(URI uri, Configuration conf) { |
| this.conf = conf; |
| } |
| |
| public String getVersion() throws IOException { |
| return "0"; |
| } |
| |
| public void deleteINode(Path path) throws IOException { |
| inodes.remove(normalize(path)); |
| } |
| |
| public void deleteBlock(Block block) throws IOException { |
| blocks.remove(block.getId()); |
| } |
| |
| public boolean inodeExists(Path path) throws IOException { |
| return inodes.containsKey(normalize(path)); |
| } |
| |
| public boolean blockExists(long blockId) throws IOException { |
| return blocks.containsKey(blockId); |
| } |
| |
| public INode retrieveINode(Path path) throws IOException { |
| return inodes.get(normalize(path)); |
| } |
| |
| public File retrieveBlock(Block block, long byteRangeStart) throws IOException { |
| byte[] data = blocks.get(block.getId()); |
| File file = createTempFile(); |
| BufferedOutputStream out = null; |
| try { |
| out = new BufferedOutputStream(new FileOutputStream(file)); |
| out.write(data, (int) byteRangeStart, data.length - (int) byteRangeStart); |
| } finally { |
| if (out != null) { |
| out.close(); |
| } |
| } |
| return file; |
| } |
| |
| private File createTempFile() throws IOException { |
| File dir = new File(conf.get("fs.s3.buffer.dir")); |
| if (!dir.exists() && !dir.mkdirs()) { |
| throw new IOException("Cannot create S3 buffer directory: " + dir); |
| } |
| File result = File.createTempFile("test-", ".tmp", dir); |
| result.deleteOnExit(); |
| return result; |
| } |
| |
| public Set<Path> listSubPaths(Path path) throws IOException { |
| Path normalizedPath = normalize(path); |
| // This is inefficient but more than adequate for testing purposes. |
| Set<Path> subPaths = new LinkedHashSet<Path>(); |
| for (Path p : inodes.tailMap(normalizedPath).keySet()) { |
| if (normalizedPath.equals(p.getParent())) { |
| subPaths.add(p); |
| } |
| } |
| return subPaths; |
| } |
| |
| public Set<Path> listDeepSubPaths(Path path) throws IOException { |
| Path normalizedPath = normalize(path); |
| String pathString = normalizedPath.toUri().getPath(); |
| if (!pathString.endsWith("/")) { |
| pathString += "/"; |
| } |
| // This is inefficient but more than adequate for testing purposes. |
| Set<Path> subPaths = new LinkedHashSet<Path>(); |
| for (Path p : inodes.tailMap(normalizedPath).keySet()) { |
| if (p.toUri().getPath().startsWith(pathString)) { |
| subPaths.add(p); |
| } |
| } |
| return subPaths; |
| } |
| |
| public void storeINode(Path path, INode inode) throws IOException { |
| inodes.put(normalize(path), inode); |
| } |
| |
| public void storeBlock(Block block, File file) throws IOException { |
| ByteArrayOutputStream out = new ByteArrayOutputStream(); |
| byte[] buf = new byte[8192]; |
| int numRead; |
| BufferedInputStream in = null; |
| try { |
| in = new BufferedInputStream(new FileInputStream(file)); |
| while ((numRead = in.read(buf)) >= 0) { |
| out.write(buf, 0, numRead); |
| } |
| } finally { |
| if (in != null) { |
| in.close(); |
| } |
| } |
| blocks.put(block.getId(), out.toByteArray()); |
| } |
| |
| private Path normalize(Path path) { |
| if (!path.isAbsolute()) { |
| throw new IllegalArgumentException("Path must be absolute: " + path); |
| } |
| return new Path(path.toUri().getPath()); |
| } |
| |
| public void purge() throws IOException { |
| inodes.clear(); |
| blocks.clear(); |
| } |
| |
| public void dump() throws IOException { |
| StringBuilder sb = new StringBuilder(getClass().getSimpleName()); |
| sb.append(", \n"); |
| for (Map.Entry<Path, INode> entry : inodes.entrySet()) { |
| sb.append(entry.getKey()).append("\n"); |
| INode inode = entry.getValue(); |
| sb.append("\t").append(inode.getFileType()).append("\n"); |
| if (inode.getFileType() == FileType.DIRECTORY) { |
| continue; |
| } |
| for (int j = 0; j < inode.getBlocks().length; j++) { |
| sb.append("\t").append(inode.getBlocks()[j]).append("\n"); |
| } |
| } |
| System.out.println(sb); |
| |
| System.out.println(inodes.keySet()); |
| System.out.println(blocks.keySet()); |
| } |
| |
| } |