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.recorder;
  27 
  28 import jdk.jfr.FlightRecorder;
  29 import jdk.jfr.FlightRecorderListener;
  30 import jdk.test.lib.Asserts;
  31 
  32 /*
  33  * @test TestRecorderListener
  34  * @key jfr
  35  * @library /test/lib
  36  *
  37  * @run main/othervm jdk.jfr.api.recorder.TestRecorderInitialized
  38  */
  39 public class TestRecorderInitialized {
  40 
  41     static class Listener implements FlightRecorderListener {
  42         private boolean notified;
  43 
  44         @Override
  45         public void recorderInitialized(FlightRecorder r) {
  46             notified = true;
  47         }
  48     }
  49 
  50     public static void main(String...args) {
  51         Listener l1 = new Listener();
  52 
  53         FlightRecorder.addListener(l1);
  54         Asserts.assertFalse(l1.notified, "Listener shouldn't be notified unless Flight Recorder is initialized");
  55         // initialize Flight Recorder
  56         FlightRecorder.getFlightRecorder();
  57         Asserts.assertTrue(l1.notified, "Listener should be notified when Flight Recorder is initialized");
  58         l1.notified = false;
  59 
  60         Listener l2 = new Listener();
  61         FlightRecorder.addListener(l1);
  62         FlightRecorder.addListener(l2);
  63         Asserts.assertTrue(l2.notified, "Listener should be notified if Flight Recorder is already initialized");
  64         Asserts.assertTrue(l1.notified, "Only added listnener should be notified, if Flight Recorder is already initialized");
  65 
  66     }
  67 }