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