--- /dev/null 2018-06-17 23:18:20.806999507 +0800 +++ new/test/jdk/jfr/api/flightrecorder/TestFlightRecorderListenerRecorderInitialized.java 2019-01-29 11:00:59.838221776 +0800 @@ -0,0 +1,98 @@ +/* + * Copyright (c) 2018, 2019, Oracle and/or its affiliates. All rights reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. Oracle designates this + * particular file as subject to the "Classpath" exception as provided + * by Oracle in the LICENSE file that accompanied this code. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + */ + +package jdk.jfr.api.flightrecorder; +import static jdk.testlibrary.Asserts.assertTrue; + +import java.util.concurrent.TimeUnit; +import java.util.concurrent.locks.Condition; +import java.util.concurrent.locks.Lock; +import java.util.concurrent.locks.ReentrantLock; + +import jdk.jfr.FlightRecorder; +import jdk.jfr.FlightRecorderListener; + +/* + * @test + * @key jfr + * @library /lib/testlibrary + * @run main/othervm jdk.jfr.api.flightrecorder.TestFlightRecorderListenerRecorderInitialized + */ +public class TestFlightRecorderListenerRecorderInitialized { + + /** + * Utility class to wait/notify + */ + private static class Signal { + + private static volatile boolean signalled; + private static final Lock lock = new ReentrantLock(); + private static final Condition cond = lock.newCondition(); + + private static void waitFor(long timeout, TimeUnit timeUnit) throws InterruptedException { + try { + lock.lock(); + if (!signalled) { + log("Waiting for FlightRecorder.recorderInitialized notification..."); + cond.await(timeout, timeUnit); + } + } finally { + lock.unlock(); + } + } + + private static void signal() { + try { + lock.lock(); + signalled = true; + cond.signalAll(); + } finally { + lock.unlock(); + } + } + }; + + public static void main(String[] args) throws Throwable { + FlightRecorder.addListener(new FlightRecorderListener() { + + @Override + public void recorderInitialized(FlightRecorder recorder) { + log("Recorder initialized"); + Signal.signal(); + } + + }); + FlightRecorder.getFlightRecorder(); + + Signal.waitFor(3, TimeUnit.SECONDS); + + assertTrue(Signal.signalled, "FlightRecorderListener.recorderInitialized has not been called"); + + } + + private static void log(String s) { + System.out.println(s); + } +}