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 * @requires vm.hasJFR 39 * @library /test/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 }