| /* |
| * Copyright (c) 2012, 2019, 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. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * 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.jfr.internal; |
| |
| import java.io.IOException; |
| import java.nio.file.Path; |
| import java.time.Instant; |
| import java.time.LocalDateTime; |
| import java.time.format.DateTimeFormatter; |
| import java.util.HashSet; |
| import java.util.Set; |
| |
| import jdk.jfr.internal.SecuritySupport.SafePath; |
| |
| public final class Repository { |
| |
| private static final int MAX_REPO_CREATION_RETRIES = 1000; |
| private static final JVM jvm = JVM.getJVM(); |
| private static final Repository instance = new Repository(); |
| |
| public final static DateTimeFormatter REPO_DATE_FORMAT = DateTimeFormatter |
| .ofPattern("yyyy_MM_dd_HH_mm_ss"); |
| private static final String JFR_REPOSITORY_LOCATION_PROPERTY = "jdk.jfr.repository"; |
| |
| private final Set<SafePath> cleanupDirectories = new HashSet<>(); |
| private SafePath baseLocation; |
| private SafePath repository; |
| |
| private Repository() { |
| } |
| |
| public static Repository getRepository() { |
| return instance; |
| } |
| |
| public synchronized void setBasePath(SafePath baseLocation) throws IOException { |
| if(baseLocation.equals(this.baseLocation)) { |
| Logger.log(LogTag.JFR, LogLevel.INFO, "Same base repository path " + baseLocation.toString() + " is set"); |
| return; |
| } |
| // Probe to see if repository can be created, needed for fail fast |
| // during JVM startup or JFR.configure |
| this.repository = createRepository(baseLocation); |
| try { |
| // Remove so we don't "leak" repositories, if JFR is never started |
| // and shutdown hook not added. |
| SecuritySupport.delete(repository); |
| } catch (IOException ioe) { |
| Logger.log(LogTag.JFR, LogLevel.INFO, "Could not delete disk repository " + repository); |
| } |
| this.baseLocation = baseLocation; |
| } |
| |
| public synchronized void ensureRepository() throws IOException { |
| if (baseLocation == null) { |
| setBasePath(SecuritySupport.JAVA_IO_TMPDIR); |
| } |
| } |
| |
| synchronized RepositoryChunk newChunk(Instant timestamp) { |
| try { |
| if (!SecuritySupport.existDirectory(repository)) { |
| this.repository = createRepository(baseLocation); |
| jvm.setRepositoryLocation(repository.toString()); |
| cleanupDirectories.add(repository); |
| } |
| return new RepositoryChunk(repository, timestamp); |
| } catch (Exception e) { |
| String errorMsg = String.format("Could not create chunk in repository %s, %s", repository, e.getMessage()); |
| Logger.log(LogTag.JFR, LogLevel.ERROR, errorMsg); |
| jvm.abort(errorMsg); |
| throw new InternalError("Could not abort after JFR disk creation error"); |
| } |
| } |
| |
| private static SafePath createRepository(SafePath basePath) throws IOException { |
| SafePath canonicalBaseRepositoryPath = createRealBasePath(basePath); |
| SafePath f = null; |
| |
| String basename = REPO_DATE_FORMAT.format(LocalDateTime.now()) + "_" + JVM.getJVM().getPid(); |
| String name = basename; |
| |
| int i = 0; |
| for (; i < MAX_REPO_CREATION_RETRIES; i++) { |
| f = new SafePath(canonicalBaseRepositoryPath.toPath().resolve(name)); |
| if (tryToUseAsRepository(f)) { |
| break; |
| } |
| name = basename + "_" + i; |
| } |
| |
| if (i == MAX_REPO_CREATION_RETRIES) { |
| throw new IOException("Unable to create JFR repository directory using base location (" + basePath + ")"); |
| } |
| SafePath canonicalRepositoryPath = SecuritySupport.toRealPath(f); |
| SecuritySupport.setProperty(JFR_REPOSITORY_LOCATION_PROPERTY, canonicalRepositoryPath.toString()); |
| return canonicalRepositoryPath; |
| } |
| |
| private static SafePath createRealBasePath(SafePath safePath) throws IOException { |
| if (SecuritySupport.exists(safePath)) { |
| if (!SecuritySupport.isWritable(safePath)) { |
| throw new IOException("JFR repository directory (" + safePath.toString() + ") exists, but isn't writable"); |
| } |
| return SecuritySupport.toRealPath(safePath); |
| } |
| SafePath p = SecuritySupport.createDirectories(safePath); |
| return SecuritySupport.toRealPath(p); |
| } |
| |
| private static boolean tryToUseAsRepository(final SafePath path) { |
| Path parent = path.toPath().getParent(); |
| if (parent == null) { |
| return false; |
| } |
| try { |
| try { |
| SecuritySupport.createDirectories(path); |
| } catch (Exception e) { |
| // file already existed or some other problem occurred |
| } |
| if (!SecuritySupport.exists(path)) { |
| return false; |
| } |
| if (!SecuritySupport.isDirectory(path)) { |
| return false; |
| } |
| return true; |
| } catch (IOException io) { |
| return false; |
| } |
| } |
| |
| synchronized void clear() { |
| for (SafePath p : cleanupDirectories) { |
| try { |
| SecuritySupport.clearDirectory(p); |
| Logger.log(LogTag.JFR, LogLevel.INFO, "Removed repository " + p); |
| } catch (IOException e) { |
| Logger.log(LogTag.JFR, LogLevel.INFO, "Repository " + p + " could not be removed at shutdown: " + e.getMessage()); |
| } |
| } |
| } |
| |
| public synchronized SafePath getRepositoryPath() { |
| return repository; |
| } |
| } |