| /* |
| * Copyright (c) 2018, 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.test.lib.Asserts.assertEquals; |
| |
| import java.util.concurrent.atomic.AtomicInteger; |
| |
| import jdk.jfr.FlightRecorder; |
| import jdk.jfr.FlightRecorderListener; |
| |
| /* |
| * @test |
| * @summary Test Flight Recorder initialization callback is only called once |
| * @key jfr |
| * @library /test/lib |
| * @run main/othervm jdk.jfr.api.flightrecorder.TestRecorderInitializationCallback |
| */ |
| public class TestRecorderInitializationCallback { |
| |
| private static class TestListener implements FlightRecorderListener { |
| private final AtomicInteger count = new AtomicInteger(); |
| |
| @Override |
| public void recorderInitialized(FlightRecorder recorder) { |
| count.incrementAndGet(); |
| System.out.println("recorderInitialized: " + recorder + " count=" + count); |
| // Get the recorder again, should not trigger listener |
| FlightRecorder.getFlightRecorder(); |
| } |
| } |
| |
| public static void main(String[] args) throws Throwable { |
| TestListener t = new TestListener(); |
| FlightRecorder.addListener(t); |
| // trigger initialization |
| FlightRecorder.getFlightRecorder(); |
| assertEquals(1, t.count.intValue(), "Expected 1 notification, got " + t.count); |
| } |
| } |