1 /*
   2  * Copyright (c) 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 
  26 package jdk.jfr.api.flightrecorder;
  27 
  28 import jdk.jfr.FlightRecorder;
  29 import jdk.jfr.Recording;
  30 import jdk.jfr.RecordingState;
  31 
  32 /**
  33  * @test
  34  * @key jfr
  35  *
  36  * @library /lib /
  37  * @run main/othervm jdk.jfr.api.flightrecorder.TestAddListenerTwice
  38  */
  39 public class TestAddListenerTwice {
  40 
  41     public static void main(String[] args) throws Throwable {
  42         MyListener listener = new MyListener();
  43 
  44         FlightRecorder.addListener(listener);
  45         FlightRecorder.addListener(listener);
  46 
  47         Recording r1 = new Recording();
  48         r1.start();
  49         listener.verifyState(2, RecordingState.RUNNING);
  50 
  51         FlightRecorder.removeListener(listener); // Should still get callback to one listener.
  52         r1.stop();
  53         listener.verifyState(3, RecordingState.STOPPED);
  54         r1.close();
  55         listener.verifyState(4, RecordingState.CLOSED);
  56     }
  57 
  58 }