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.recording.state;
  27 
  28 import static jdk.test.lib.Asserts.assertEquals;
  29 
  30 import jdk.jfr.FlightRecorder;
  31 import jdk.jfr.FlightRecorderListener;
  32 import jdk.jfr.Recording;
  33 
  34 /**
  35  * @test
  36  * @summary Test Recording state with concurrent recordings
  37  * @key jfr
  38  *
  39  * @library /lib /
  40  * @run main/othervm jdk.jfr.api.recording.state.TestStateIdenticalListeners
  41  */
  42 public class TestStateIdenticalListeners {
  43 
  44     public static void main(String[] args) throws Throwable {
  45         TestListener testListener = new TestListener();
  46         // Add the same listener twice
  47         FlightRecorder.addListener(testListener);
  48         FlightRecorder.addListener(testListener);
  49 
  50         // Start recording
  51         Recording recording = new Recording();
  52         recording.start();
  53         recording.stop();
  54 
  55         // We expect 4 notifications in total: 1 RUNNING and 1 STOPPED
  56         // notification for each listener registration
  57         // NOT 2 notifications: we have added the same listener again
  58         assertEquals(4, testListener.notificationCount, "Expected 2 notifications, got " + testListener.notificationCount);
  59 
  60         System.out.println("Test Passed");
  61         recording.close();
  62     }
  63 
  64     private static class TestListener implements FlightRecorderListener {
  65         private int notificationCount;
  66 
  67         @Override
  68         public void recordingStateChanged(Recording recording) {
  69             System.out.println("recordingStateChanged: " + " recording: " + recording + " state: " + recording.getState());
  70             ++notificationCount;
  71         }
  72     }
  73 }