| /* |
| * 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.lucene.mockfile; |
| |
| import java.io.IOException; |
| import java.io.OutputStream; |
| import java.nio.channels.AsynchronousFileChannel; |
| import java.nio.channels.FileChannel; |
| import java.nio.channels.SeekableByteChannel; |
| import java.nio.file.CopyOption; |
| import java.nio.file.FileSystem; |
| import java.nio.file.LinkOption; |
| import java.nio.file.OpenOption; |
| import java.nio.file.Path; |
| import java.nio.file.StandardOpenOption; |
| import java.nio.file.attribute.FileAttribute; |
| import java.util.Arrays; |
| import java.util.Set; |
| import java.util.concurrent.ExecutorService; |
| |
| import org.apache.lucene.util.IOUtils; |
| import org.apache.lucene.util.InfoStream; |
| |
| /** |
| * FileSystem that records all major destructive filesystem activities. |
| */ |
| public class VerboseFS extends FilterFileSystemProvider { |
| final InfoStream infoStream; |
| final Path root; |
| |
| /** |
| * Create a new instance, recording major filesystem write activities |
| * (create, delete, etc) to the specified {@code InfoStream}. |
| * @param delegate delegate filesystem to wrap. |
| * @param infoStream infoStream to send messages to. The component for |
| * messages is named "FS". |
| */ |
| public VerboseFS(FileSystem delegate, InfoStream infoStream) { |
| super("verbose://", delegate); |
| this.infoStream = infoStream; |
| this.root = this.getFileSystem(null).getPath(".").toAbsolutePath().normalize(); |
| } |
| |
| /** Records message, and rethrows exception if not null */ |
| private void sop(String text, Throwable exception) throws IOException { |
| if (exception == null) { |
| if (infoStream.isEnabled("FS")) { |
| infoStream.message("FS", text); |
| } |
| } else { |
| if (infoStream.isEnabled("FS")) { |
| infoStream.message("FS", text + " (FAILED: " + exception + ")"); |
| } |
| throw IOUtils.rethrowAlways(exception); |
| } |
| } |
| |
| private String path(Path path) { |
| path = root.relativize(path.toAbsolutePath().normalize()); |
| return path.toString(); |
| } |
| |
| @Override |
| public void createDirectory(Path dir, FileAttribute<?>... attrs) throws IOException { |
| Throwable exception = null; |
| try { |
| super.createDirectory(dir, attrs); |
| } catch (Throwable t) { |
| exception = t; |
| } finally { |
| sop("createDirectory: " + path(dir), exception); |
| } |
| } |
| |
| @Override |
| public void delete(Path path) throws IOException { |
| Throwable exception = null; |
| try { |
| super.delete(path); |
| } catch (Throwable t) { |
| exception = t; |
| } finally { |
| sop("delete: " + path(path), exception); |
| } |
| } |
| |
| @Override |
| public void copy(Path source, Path target, CopyOption... options) throws IOException { |
| Throwable exception = null; |
| try { |
| super.copy(source, target, options); |
| } catch (Throwable t) { |
| exception = t; |
| } finally { |
| sop("copy" + Arrays.toString(options) + ": " + path(source) + " -> " + path(target), exception); |
| } |
| } |
| |
| @Override |
| public void move(Path source, Path target, CopyOption... options) throws IOException { |
| Throwable exception = null; |
| try { |
| super.move(source, target, options); |
| } catch (Throwable t) { |
| exception = t; |
| } finally { |
| sop("move" + Arrays.toString(options) + ": " + path(source) + " -> " + path(target), exception); |
| } |
| } |
| |
| @Override |
| public void setAttribute(Path path, String attribute, Object value, LinkOption... options) throws IOException { |
| Throwable exception = null; |
| try { |
| super.setAttribute(path, attribute, value, options); |
| } catch (Throwable t) { |
| exception = t; |
| } finally { |
| sop("setAttribute[" + attribute + "=" + value + "]: " + path(path), exception); |
| } |
| } |
| |
| @Override |
| public OutputStream newOutputStream(Path path, OpenOption... options) throws IOException { |
| Throwable exception = null; |
| try { |
| return super.newOutputStream(path, options); |
| } catch (Throwable t) { |
| exception = t; |
| } finally { |
| sop("newOutputStream" + Arrays.toString(options) + ": " + path(path), exception); |
| } |
| throw new AssertionError(); |
| } |
| |
| private boolean containsDestructive(Set<? extends OpenOption> options) { |
| return (options.contains(StandardOpenOption.APPEND) || |
| options.contains(StandardOpenOption.WRITE) || |
| options.contains(StandardOpenOption.DELETE_ON_CLOSE)); |
| } |
| |
| @Override |
| public FileChannel newFileChannel(Path path, Set<? extends OpenOption> options, FileAttribute<?>... attrs) throws IOException { |
| Throwable exception = null; |
| try { |
| return super.newFileChannel(path, options, attrs); |
| } catch (Throwable t) { |
| exception = t; |
| } finally { |
| if (containsDestructive(options)) { |
| sop("newFileChannel" + options + ": " + path(path), exception); |
| } else { |
| if (exception != null) { |
| throw IOUtils.rethrowAlways(exception); |
| } |
| } |
| } |
| throw new AssertionError(); |
| } |
| |
| @Override |
| public AsynchronousFileChannel newAsynchronousFileChannel(Path path, Set<? extends OpenOption> options, ExecutorService executor, FileAttribute<?>... attrs) throws IOException { |
| Throwable exception = null; |
| try { |
| return super.newAsynchronousFileChannel(path, options, executor, attrs); |
| } catch (Throwable t) { |
| exception = t; |
| } finally { |
| if (containsDestructive(options)) { |
| sop("newAsynchronousFileChannel" + options + ": " + path(path), exception); |
| } else { |
| if (exception != null) { |
| throw IOUtils.rethrowAlways(exception); |
| } |
| } |
| } |
| throw new AssertionError(); |
| } |
| |
| @Override |
| public SeekableByteChannel newByteChannel(Path path, Set<? extends OpenOption> options, FileAttribute<?>... attrs) throws IOException { |
| Throwable exception = null; |
| try { |
| return super.newByteChannel(path, options, attrs); |
| } catch (Throwable t) { |
| exception = t; |
| } finally { |
| if (containsDestructive(options)) { |
| sop("newByteChannel" + options + ": " + path(path), exception); |
| } else { |
| if (exception != null) { |
| throw IOUtils.rethrowAlways(exception); |
| } |
| } |
| } |
| throw new AssertionError(); |
| } |
| |
| @Override |
| public void createSymbolicLink(Path link, Path target, FileAttribute<?>... attrs) throws IOException { |
| Throwable exception = null; |
| try { |
| super.createSymbolicLink(link, target, attrs); |
| } catch (Throwable t) { |
| exception = t; |
| } finally { |
| sop("createSymbolicLink: " + path(link) + " -> " + path(target), exception); |
| } |
| } |
| |
| @Override |
| public void createLink(Path link, Path existing) throws IOException { |
| Throwable exception = null; |
| try { |
| super.createLink(link, existing); |
| } catch (Throwable t) { |
| exception = t; |
| } finally { |
| sop("createLink: " + path(link) + " -> " + path(existing), exception); |
| } |
| } |
| |
| @Override |
| public boolean deleteIfExists(Path path) throws IOException { |
| Throwable exception = null; |
| try { |
| return super.deleteIfExists(path); |
| } catch (Throwable t) { |
| exception = t; |
| } finally { |
| sop("deleteIfExists: " + path(path), exception); |
| } |
| throw new AssertionError(); |
| } |
| } |