--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/jdk.jfr/share/classes/jdk/jfr/internal/tool/Assemble.java Wed Dec 05 16:40:12 2018 +0100
@@ -0,0 +1,127 @@
+/*
+ * Copyright (c) 2016, 2018, 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.tool;
+
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.PrintStream;
+import java.nio.channels.FileChannel;
+import java.nio.file.DirectoryStream;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.Deque;
+import java.util.List;
+
+final class Assemble extends Command {
+
+ @Override
+ public String getName() {
+ return "assemble";
+ }
+
+ @Override
+ public List<String> getOptionSyntax() {
+ return Collections.singletonList("<repository> <file>");
+ }
+
+ @Override
+ public String getDescription() {
+ return "Assemble leftover chunks from a disk repository into a recording file";
+ }
+
+ @Override
+ public void displayOptionUsage(PrintStream stream) {
+ stream.println(" <repository> Directory where the repository is located");
+ stream.println();
+ stream.println(" <file> Name of the recording file (.jfr) to create");
+ }
+
+ @Override
+ public void execute(Deque<String> options) throws UserSyntaxException, UserDataException {
+ ensureMinArgumentCount(options, 2);
+ ensureMaxArgumentCount(options, 2);
+ Path repository = getDirectory(options.pop());
+
+ Path file = Paths.get(options.pop());
+ ensureFileDoesNotExist(file);
+ ensureJFRFile(file);
+
+ try (FileOutputStream fos = new FileOutputStream(file.toFile())) {
+ List<Path> files = listJFRFiles(repository);
+ if (files.isEmpty()) {
+ throw new UserDataException("no *.jfr files found at " + repository);
+ }
+ println();
+ println("Assembling files... ");
+ println();
+ transferTo(files, file, fos.getChannel());
+ println();
+ println("Finished.");
+ } catch (IOException e) {
+ throw new UserDataException("could not open destination file " + file + ". " + e.getMessage());
+ }
+ }
+
+ private List<Path> listJFRFiles(Path path) throws UserDataException {
+ try {
+ List<Path> files = new ArrayList<>();
+ if (Files.isDirectory(path)) {
+ try (DirectoryStream<Path> stream = Files.newDirectoryStream(path, "*.jfr")) {
+ for (Path p : stream) {
+ if (!Files.isDirectory(p) && Files.isReadable(p)) {
+ files.add(p);
+ }
+ }
+ }
+ }
+ files.sort((u, v) -> u.getFileName().compareTo(v.getFileName()));
+ return files;
+ } catch (IOException ioe) {
+ throw new UserDataException("could not list *.jfr for directory " + path + ". " + ioe.getMessage());
+ }
+ }
+
+ private void transferTo(List<Path> sourceFiles, Path output, FileChannel out) throws UserDataException {
+ long pos = 0;
+ for (Path p : sourceFiles) {
+ println(" " + p.toString());
+ try (FileChannel sourceChannel = FileChannel.open(p)) {
+ long rem = Files.size(p);
+ while (rem > 0) {
+ long n = Math.min(rem, 1024 * 1024);
+ long w = out.transferFrom(sourceChannel, pos, n);
+ pos += w;
+ rem -= w;
+ }
+ } catch (IOException ioe) {
+ throw new UserDataException("could not copy recording chunk " + p + " to new file. " + ioe.getMessage());
+ }
+ }
+ }
+}