1 /*
   2  * Copyright (c) 2015, 2019, 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.io.File;
  29 import java.util.regex.Matcher;
  30 import java.util.regex.Pattern;
  31 
  32 import jdk.testlibrary.Asserts;
  33 import jdk.testlibrary.jfr.FileHelper;
  34 import jdk.testlibrary.OutputAnalyzer;
  35 import jdk.testlibrary.jfr.JcmdAsserts;
  36 import jdk.testlibrary.jfr.JcmdHelper;
  37 
  38 /*
  39  * @test
  40  * @summary Start a recording without name.
  41  * @key jfr
  42  * @library /lib/testlibrary
  43  * @run main/othervm jdk.jfr.jcmd.TestJcmdStartStopDefault
  44  */
  45 public class TestJcmdStartStopDefault {
  46 
  47     public static void main(String[] args) throws Exception {
  48         File recording = new File("TestJcmdStartStopDefault.jfr");
  49 
  50         OutputAnalyzer output = JcmdHelper.jcmd("JFR.start");
  51         JcmdAsserts.assertRecordingHasStarted(output);
  52 
  53         String name = parseRecordingName(output);
  54         name= "Recording-" + name;
  55         JcmdHelper.waitUntilRunning(name);
  56 
  57         output = JcmdHelper.jcmd("JFR.dump",
  58                 "name=" + name,
  59                 "filename=" + recording.getAbsolutePath());
  60         JcmdAsserts.assertRecordingDumpedToFile(output, name, recording);
  61         JcmdHelper.stopAndCheck(name);
  62         FileHelper.verifyRecording(recording);
  63     }
  64 
  65     private static String parseRecordingName(OutputAnalyzer output) {
  66         // Expected output:
  67         // Started recording recording-1. No limit (duration/maxsize/maxage) in use.
  68         // Use JFR.dump name=recording-1 filename=FILEPATH to copy recording data to file.
  69 
  70         String stdout = output.getStdout();
  71         Pattern p = Pattern.compile(".*Use JFR.dump name=(\\S+).*", Pattern.DOTALL);
  72         Matcher m = p.matcher(stdout);
  73         Asserts.assertTrue(m.matches(), "Could not parse recording name");
  74         String name = m.group(1);
  75         System.out.println("Recording name=" + name);
  76         return name;
  77     }
  78 }