test/jdk/jdk/jfr/api/flightrecorder/TestAddListenerTwice.java

/*
 * 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 jdk.jfr.FlightRecorder;
import jdk.jfr.Recording;
import jdk.jfr.RecordingState;

/*
 * @test
 * @key jfr
 * @library /test/lib /test/jdk
 * @run main/othervm jdk.jfr.api.flightrecorder.TestAddListenerTwice
 */
public class TestAddListenerTwice {

    public static void main(String[] args) throws Throwable {
        MyListener listener = new MyListener();

        FlightRecorder.addListener(listener);
        FlightRecorder.addListener(listener);

        Recording r1 = new Recording();
        r1.start();
        listener.verifyState(2, RecordingState.RUNNING);

        FlightRecorder.removeListener(listener); // Should still get callback to one listener.
        r1.stop();
        listener.verifyState(3, RecordingState.STOPPED);
        r1.close();
        listener.verifyState(4, RecordingState.CLOSED);
    }

}