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 * 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 Listener(RecordingState state)48 public Listener(RecordingState state) { 49 waitFor = state; 50 } 51 52 @Override recordingStateChanged(Recording recording)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 waitFor()61 public void waitFor() throws InterruptedException { 62 latch.await(); 63 } 64 } 65 main(String... args)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 testDefaultrecordingStateChangedListener()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 } 107