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/*
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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.util.Arrays;
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import java.util.Deque;
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import java.util.LinkedList;
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/**
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* Launcher class for the JDK_HOME\bin\jfr tool
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*
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*/
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public final class Main {
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private static final int EXIT_OK = 0;
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private static final int EXIT_FAILED = 1;
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private static final int EXIT_WRONG_ARGUMENTS = 2;
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public static void main(String... args) {
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Deque<String> argList = new LinkedList<>(Arrays.asList(args));
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if (argList.isEmpty()) {
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System.out.println(Command.title);
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System.out.println();
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System.out.println("Before using this tool, you must have a recording file.");
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System.out.println("A file can be created by starting a recording from command line:");
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System.out.println();
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System.out.println(" java -XX:StartFlightRecording:filename=recording.jfr,duration=30s ... ");
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System.out.println();
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System.out.println("A recording can also be started on already running Java Virtual Machine:");
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System.out.println();
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System.out.println(" jcmd (to list available pids)");
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System.out.println(" jcmd <pid> JFR.start");
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System.out.println();
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System.out.println("Recording data can be dumped to file using the JFR.dump command:");
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System.out.println();
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System.out.println(" jcmd <pid> JFR.dump filename=recording.jfr");
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System.out.println();
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System.out.println("The contents of the recording can then be printed, for example:");
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System.out.println();
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System.out.println(" jfr print recording.jfr");
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System.out.println();
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System.out.println(" jfr print --events CPULoad,GarbageCollection recording.jfr");
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System.out.println();
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System.out.println(" jfr print --json --events CPULoad recording.jfr");
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System.out.println();
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System.out.println(" jfr print --categories \"GC,JVM,Java*\" recording.jfr");
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System.out.println();
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System.out.println(" jfr print --events \"jdk.*\" --stack-depth 64 recording.jfr");
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System.out.println();
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System.out.println(" jfr summary recording.jfr");
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System.out.println();
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System.out.println(" jfr metadata recoding.jfr");
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System.out.println();
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System.out.println("For more information about available commands, use 'jfr help'");
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System.exit(EXIT_OK);
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}
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String command = argList.remove();
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for (Command c : Command.getCommands()) {
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if (c.matches(command)) {
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try {
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c.execute(argList);
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System.exit(EXIT_OK);
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} catch (UserDataException ude) {
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System.err.println("jfr " + c.getName() + ": " + ude.getMessage());
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System.exit(EXIT_FAILED);
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} catch (UserSyntaxException use) {
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System.err.println("jfr " + c.getName() + ": " + use.getMessage());
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System.err.println();
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System.err.println("Usage:");
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System.err.println();
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c.displayUsage(System.err);
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System.exit(EXIT_WRONG_ARGUMENTS);
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} catch (Throwable e) {
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System.err.println("jfr " + c.getName() + ": unexpected internal error, " + e.getMessage());
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e.printStackTrace();
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System.exit(EXIT_FAILED);
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}
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}
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}
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System.err.println("jfr: unknown command '" + command + "'");
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System.err.println();
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System.err.println("List of available commands:");
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System.err.println();
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Command.displayAvailableCommands(System.err);
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System.exit(EXIT_WRONG_ARGUMENTS);
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}
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}
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