1 /*
   2  * Copyright (c) 2013, 2019, 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.testlibrary.jfr.SimpleEvent;
  36 import jdk.testlibrary.jfr.JmxHelper;
  37 
  38 /* @test
  39  * @key jfr
  40  * @library /lib/testlibrary
  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 }