128 lines
4.7 KiB
Java
128 lines
4.7 KiB
Java
/*
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* Copyright (c) 2016, 2018, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package jdk.jfr.internal.tool;
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import java.io.FileOutputStream;
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import java.io.IOException;
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import java.io.PrintStream;
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import java.nio.channels.FileChannel;
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import java.nio.file.DirectoryStream;
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import java.nio.file.Files;
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import java.nio.file.Path;
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import java.nio.file.Paths;
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import java.util.ArrayList;
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import java.util.Collections;
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import java.util.Deque;
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import java.util.List;
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final class Assemble extends Command {
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@Override
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public String getName() {
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return "assemble";
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}
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@Override
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public List<String> getOptionSyntax() {
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return Collections.singletonList("<repository> <file>");
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}
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@Override
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public String getDescription() {
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return "Assemble leftover chunks from a disk repository into a recording file";
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}
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@Override
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public void displayOptionUsage(PrintStream stream) {
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stream.println(" <repository> Directory where the repository is located");
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stream.println();
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stream.println(" <file> Name of the recording file (.jfr) to create");
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}
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@Override
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public void execute(Deque<String> options) throws UserSyntaxException, UserDataException {
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ensureMinArgumentCount(options, 2);
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ensureMaxArgumentCount(options, 2);
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Path repository = getDirectory(options.pop());
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Path file = Paths.get(options.pop());
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ensureFileDoesNotExist(file);
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ensureJFRFile(file);
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try (FileOutputStream fos = new FileOutputStream(file.toFile())) {
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List<Path> files = listJFRFiles(repository);
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if (files.isEmpty()) {
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throw new UserDataException("no *.jfr files found at " + repository);
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}
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println();
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println("Assembling files... ");
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println();
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transferTo(files, file, fos.getChannel());
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println();
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println("Finished.");
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} catch (IOException e) {
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throw new UserDataException("could not open destination file " + file + ". " + e.getMessage());
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}
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}
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private List<Path> listJFRFiles(Path path) throws UserDataException {
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try {
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List<Path> files = new ArrayList<>();
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if (Files.isDirectory(path)) {
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try (DirectoryStream<Path> stream = Files.newDirectoryStream(path, "*.jfr")) {
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for (Path p : stream) {
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if (!Files.isDirectory(p) && Files.isReadable(p)) {
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files.add(p);
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}
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}
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}
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}
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files.sort((u, v) -> u.getFileName().compareTo(v.getFileName()));
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return files;
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} catch (IOException ioe) {
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throw new UserDataException("could not list *.jfr for directory " + path + ". " + ioe.getMessage());
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}
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}
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private void transferTo(List<Path> sourceFiles, Path output, FileChannel out) throws UserDataException {
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long pos = 0;
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for (Path p : sourceFiles) {
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println(" " + p.toString());
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try (FileChannel sourceChannel = FileChannel.open(p)) {
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long rem = Files.size(p);
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while (rem > 0) {
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long n = Math.min(rem, 1024 * 1024);
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long w = out.transferFrom(sourceChannel, pos, n);
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pos += w;
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rem -= w;
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}
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} catch (IOException ioe) {
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throw new UserDataException("could not copy recording chunk " + p + " to new file. " + ioe.getMessage());
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}
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}
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}
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}
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