1 /* 2 * Copyright (c) 2018, 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.api.flightrecorder; 27 import static jdk.testlibrary.Asserts.assertTrue; 28 29 import java.util.concurrent.TimeUnit; 30 import java.util.concurrent.locks.Condition; 31 import java.util.concurrent.locks.Lock; 32 import java.util.concurrent.locks.ReentrantLock; 33 34 import jdk.jfr.FlightRecorder; 35 import jdk.jfr.FlightRecorderListener; 36 37 /* 38 * @test 39 * @key jfr 40 * @library /lib/testlibrary 41 * @run main/othervm jdk.jfr.api.flightrecorder.TestFlightRecorderListenerRecorderInitialized 42 */ 43 public class TestFlightRecorderListenerRecorderInitialized { 44 45 /** 46 * Utility class to wait/notify 47 */ 48 private static class Signal { 49 50 private static volatile boolean signalled; 51 private static final Lock lock = new ReentrantLock(); 52 private static final Condition cond = lock.newCondition(); 53 54 private static void waitFor(long timeout, TimeUnit timeUnit) throws InterruptedException { 55 try { 56 lock.lock(); 57 if (!signalled) { 58 log("Waiting for FlightRecorder.recorderInitialized notification..."); 59 cond.await(timeout, timeUnit); 60 } 61 } finally { 62 lock.unlock(); 63 } 64 } 65 66 private static void signal() { 67 try { 68 lock.lock(); 69 signalled = true; 70 cond.signalAll(); 71 } finally { 72 lock.unlock(); 73 } 74 } 75 }; 76 77 public static void main(String[] args) throws Throwable { 78 FlightRecorder.addListener(new FlightRecorderListener() { 79 80 @Override 81 public void recorderInitialized(FlightRecorder recorder) { 82 log("Recorder initialized"); 83 Signal.signal(); 84 } 85 86 }); 87 FlightRecorder.getFlightRecorder(); 88 89 Signal.waitFor(3, TimeUnit.SECONDS); 90 91 assertTrue(Signal.signalled, "FlightRecorderListener.recorderInitialized has not been called"); 92 93 } 94 95 private static void log(String s) { 96 System.out.println(s); 97 } 98 }