1 /* 2 * Copyright (c) 2013, 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.jmx; 27 28 import java.io.IOException; 29 import java.util.List; 30 31 import jdk.jfr.FlightRecorder; 32 import jdk.jfr.Recording; 33 import jdk.management.jfr.FlightRecorderMXBean; 34 import jdk.management.jfr.RecordingInfo; 35 import jdk.test.lib.jfr.SimpleEvent; 36 37 /* @test 38 * @key jfr 39 * @requires vm.hasJFR 40 * @library /test/lib /test/jdk 41 * @run main/othervm jdk.jfr.jmx.TestSnapshot 42 */ 43 public class TestSnapshot { 44 45 public static void main(String[] args) throws Exception { 46 testEmpty(); 47 testStopped(); 48 } 49 50 private static void testStopped() throws IOException { 51 try (Recording r = new Recording()) { 52 r.enable(SimpleEvent.class); 53 r.start(); 54 SimpleEvent se = new SimpleEvent(); 55 se.commit(); 56 r.stop(); 57 58 try (Recording snapshot = FlightRecorder.getFlightRecorder().takeSnapshot()) { 59 r.close(); 60 FlightRecorderMXBean mxBean = JmxHelper.getFlighteRecorderMXBean(); 61 List<RecordingInfo> recs = mxBean.getRecordings(); 62 JmxHelper.verifyEquals(recs.get(0), snapshot); 63 } 64 } 65 } 66 67 private static void testEmpty() throws IOException { 68 try (Recording snapshot = FlightRecorder.getFlightRecorder().takeSnapshot()) { 69 FlightRecorderMXBean mxBean = JmxHelper.getFlighteRecorderMXBean(); 70 List<RecordingInfo> recs = mxBean.getRecordings(); 71 JmxHelper.verifyEquals(recs.get(0), snapshot); 72 } 73 } 74 }