1 /*
   2  * Copyright (c) 2016, 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 package jdk.jfr.api.recorder;
  26 
  27 import java.util.concurrent.CountDownLatch;
  28 
  29 import jdk.jfr.FlightRecorder;
  30 import jdk.jfr.FlightRecorderListener;
  31 import jdk.jfr.Recording;
  32 import jdk.jfr.RecordingState;
  33 
  34 /**
  35  * @test TestRecorderListener
  36  *
  37  * @key jfr
  38  * @requires vm.hasJFR
  39  * @run main/othervm jdk.jfr.api.recorder.TestRecorderListener
  40  */
  41 public class TestRecorderListener {
  42 
  43     static class Listener implements FlightRecorderListener {
  44 
  45         private final CountDownLatch latch = new CountDownLatch(1);
  46         private final RecordingState waitFor;
  47 
  48         public Listener(RecordingState state) {
  49             waitFor = state;
  50         }
  51 
  52         @Override
  53         public void recordingStateChanged(Recording recording) {
  54             System.out.println("Listener: recording=" + recording.getName() + " state=" + recording.getState());
  55             RecordingState rs = recording.getState();
  56             if (rs == waitFor) {
  57                 latch.countDown();
  58             }
  59         }
  60 
  61         public void waitFor() throws InterruptedException {
  62             latch.await();
  63         }
  64     }
  65 
  66     public static void main(String... args) throws Exception {
  67         Listener recordingListener = new Listener(RecordingState.RUNNING);
  68         FlightRecorder.addListener(recordingListener);
  69 
  70         Listener stoppedListener = new Listener(RecordingState.STOPPED);
  71         FlightRecorder.addListener(stoppedListener);
  72 
  73         Listener finishedListener = new Listener(RecordingState.CLOSED);
  74         FlightRecorder.addListener(finishedListener);
  75 
  76         Recording recording = new Recording();
  77         if (recording.getState() != RecordingState.NEW) {
  78             recording.close();
  79             throw new Exception("New recording should be in NEW state");
  80         }
  81 
  82         recording.start();
  83         recordingListener.waitFor();
  84 
  85         recording.stop();
  86         stoppedListener.waitFor();
  87 
  88         recording.close();
  89         finishedListener.waitFor();
  90 
  91         testDefaultrecordingStateChangedListener();
  92 
  93     }
  94 
  95     private static class DummyListener implements FlightRecorderListener {
  96 
  97     }
  98 
  99     private static void testDefaultrecordingStateChangedListener() {
 100         FlightRecorder.addListener(new DummyListener());
 101         Recording recording = new Recording();
 102         recording.start();
 103         recording.stop();
 104         recording.close();
 105     }
 106 }