| /* |
| * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package jdk.testlibrary; |
| |
| import java.io.IOException; |
| import java.nio.file.DirectoryNotEmptyException; |
| import java.nio.file.FileVisitResult; |
| import java.nio.file.Files; |
| import java.nio.file.NoSuchFileException; |
| import java.nio.file.Path; |
| import java.nio.file.SimpleFileVisitor; |
| import java.nio.file.attribute.BasicFileAttributes; |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.concurrent.TimeUnit; |
| |
| |
| /** |
| * Common library for various test file utility functions. |
| */ |
| public final class FileUtils { |
| |
| private static final boolean isWindows = |
| System.getProperty("os.name").startsWith("Windows"); |
| private static final int RETRY_DELETE_MILLIS = isWindows ? 500 : 0; |
| private static final int MAX_RETRY_DELETE_TIMES = isWindows ? 15 : 0; |
| |
| /** |
| * Deletes a file, retrying if necessary. |
| * |
| * @param path the file to delete |
| * |
| * @throws NoSuchFileException |
| * if the file does not exist (optional specific exception) |
| * @throws DirectoryNotEmptyException |
| * if the file is a directory and could not otherwise be deleted |
| * because the directory is not empty (optional specific exception) |
| * @throws IOException |
| * if an I/O error occurs |
| */ |
| public static void deleteFileWithRetry(Path path) |
| throws IOException |
| { |
| try { |
| deleteFileWithRetry0(path); |
| } catch (InterruptedException x) { |
| throw new IOException("Interrupted while deleting.", x); |
| } |
| } |
| |
| /** |
| * Deletes a file, retrying if necessary. |
| * No exception thrown if file doesn't exist. |
| * |
| * @param path the file to delete |
| * |
| * @throws NoSuchFileException |
| * if the file does not exist (optional specific exception) |
| * @throws DirectoryNotEmptyException |
| * if the file is a directory and could not otherwise be deleted |
| * because the directory is not empty (optional specific exception) |
| * @throws IOException |
| * if an I/O error occurs |
| */ |
| public static void deleteFileIfExistsWithRetry(Path path) |
| throws IOException |
| { |
| try { |
| if(Files.exists(path)) |
| deleteFileWithRetry0(path); |
| } catch (InterruptedException x) { |
| throw new IOException("Interrupted while deleting.", x); |
| } |
| } |
| |
| private static void deleteFileWithRetry0(Path path) |
| throws IOException, InterruptedException |
| { |
| int times = 0; |
| IOException ioe = null; |
| while (true) { |
| try { |
| Files.delete(path); |
| while (Files.exists(path)) { |
| times++; |
| if (times > MAX_RETRY_DELETE_TIMES) |
| throw new IOException("File still exists after " + times + " waits."); |
| Thread.sleep(RETRY_DELETE_MILLIS); |
| } |
| break; |
| } catch (NoSuchFileException | DirectoryNotEmptyException x) { |
| throw x; |
| } catch (IOException x) { |
| // Backoff/retry in case another process is accessing the file |
| times++; |
| if (ioe == null) |
| ioe = x; |
| else |
| ioe.addSuppressed(x); |
| |
| if (times > MAX_RETRY_DELETE_TIMES) |
| throw ioe; |
| Thread.sleep(RETRY_DELETE_MILLIS); |
| } |
| } |
| } |
| |
| /** |
| * Deletes a directory and its subdirectories, retrying if necessary. |
| * |
| * @param dir the directory to delete |
| * |
| * @throws IOException |
| * If an I/O error occurs. Any such exceptions are caught |
| * internally. If only one is caught, then it is re-thrown. |
| * If more than one exception is caught, then the second and |
| * following exceptions are added as suppressed exceptions of the |
| * first one caught, which is then re-thrown. |
| */ |
| public static void deleteFileTreeWithRetry(Path dir) |
| throws IOException |
| { |
| IOException ioe = null; |
| final List<IOException> excs = deleteFileTreeUnchecked(dir); |
| if (!excs.isEmpty()) { |
| ioe = excs.remove(0); |
| for (IOException x : excs) |
| ioe.addSuppressed(x); |
| } |
| if (ioe != null) |
| throw ioe; |
| } |
| |
| public static List<IOException> deleteFileTreeUnchecked(Path dir) { |
| final List<IOException> excs = new ArrayList<>(); |
| try { |
| java.nio.file.Files.walkFileTree(dir, new SimpleFileVisitor<Path>() { |
| @Override |
| public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) { |
| try { |
| deleteFileWithRetry0(file); |
| } catch (IOException x) { |
| excs.add(x); |
| } catch (InterruptedException x) { |
| excs.add(new IOException("Interrupted while deleting.", x)); |
| return FileVisitResult.TERMINATE; |
| } |
| return FileVisitResult.CONTINUE; |
| } |
| @Override |
| public FileVisitResult postVisitDirectory(Path dir, IOException exc) { |
| try { |
| deleteFileWithRetry0(dir); |
| } catch (IOException x) { |
| excs.add(x); |
| } catch (InterruptedException x) { |
| excs.add(new IOException("Interrupted while deleting.", x)); |
| return FileVisitResult.TERMINATE; |
| } |
| return FileVisitResult.CONTINUE; |
| } |
| @Override |
| public FileVisitResult visitFileFailed(Path file, IOException exc) { |
| excs.add(exc); |
| return FileVisitResult.CONTINUE; |
| } |
| }); |
| } catch (IOException x) { |
| excs.add(x); |
| } |
| return excs; |
| } |
| |
| /** |
| * Checks whether all file systems are accessible. This is performed |
| * by checking free disk space on all mounted file systems via a |
| * separate, spawned process. File systems are considered to be |
| * accessible if this process completes successfully before a given |
| * fixed duration has elapsed. |
| * |
| * @implNote On Unix this executes the {@code df} command in a separate |
| * process and on Windows always returns {@code true}. |
| */ |
| public static boolean areFileSystemsAccessible() throws IOException { |
| boolean areFileSystemsAccessible = true; |
| if (!isWindows) { |
| // try to check whether 'df' hangs |
| System.out.println("\n--- df output ---"); |
| System.out.flush(); |
| Process proc = new ProcessBuilder("df").inheritIO().start(); |
| try { |
| proc.waitFor(90, TimeUnit.SECONDS); |
| } catch (InterruptedException ignored) { |
| } |
| try { |
| int exitValue = proc.exitValue(); |
| if (exitValue != 0) { |
| System.err.printf("df process exited with %d != 0%n", |
| exitValue); |
| areFileSystemsAccessible = false; |
| } |
| } catch (IllegalThreadStateException ignored) { |
| System.err.println("df command apparently hung"); |
| areFileSystemsAccessible = false; |
| } |
| } |
| return areFileSystemsAccessible; |
| } |
| } |