1 /*
   2  * Copyright (c) 2015, 2018, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package jdk.jfr.jcmd;
  27 
  28 import java.nio.file.Path;
  29 import java.nio.file.Paths;
  30 import java.util.regex.Matcher;
  31 import java.util.regex.Pattern;
  32 
  33 import jdk.test.lib.Asserts;
  34 import jdk.test.lib.jfr.FileHelper;
  35 import jdk.test.lib.process.OutputAnalyzer;
  36 
  37 /**
  38  * @test
  39  * @summary Start a recording without name.
  40  * @key jfr
  41  *
  42  * @library /lib /
  43  * @run main/othervm jdk.jfr.jcmd.TestJcmdStartStopDefault
  44  */
  45 public class TestJcmdStartStopDefault {
  46 
  47     public static void main(String[] args) throws Exception {
  48         Path recording = Paths.get(".","TestJcmdStartStopDefault.jfr").toAbsolutePath().normalize();
  49 
  50         OutputAnalyzer output = JcmdHelper.jcmd("JFR.start");
  51         JcmdAsserts.assertRecordingHasStarted(output);
  52 
  53         String name = parseRecordingName(output);
  54         JcmdHelper.waitUntilRunning(name);
  55 
  56         output = JcmdHelper.jcmd("JFR.dump",
  57                 "name=" + name,
  58                 "filename=" + recording);
  59         JcmdAsserts.assertRecordingDumpedToFile(output, recording.toFile());
  60         JcmdHelper.stopAndCheck(name);
  61         FileHelper.verifyRecording(recording.toFile());
  62     }
  63 
  64     private static String parseRecordingName(OutputAnalyzer output) {
  65         // Expected output:
  66         // Started recording recording-1. No limit (duration/maxsize/maxage) in use.
  67         // Use JFR.dump name=recording-1 filename=FILEPATH to copy recording data to file.
  68 
  69         String stdout = output.getStdout();
  70         Pattern p = Pattern.compile(".*Use jcmd \\d+ JFR.dump name=(\\S+).*", Pattern.DOTALL);
  71         Matcher m = p.matcher(stdout);
  72         Asserts.assertTrue(m.matches(), "Could not parse recording name");
  73         String name = m.group(1);
  74         System.out.println("Recording name=" + name);
  75         return name;
  76     }
  77 }