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1 /* |
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2 * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. Oracle designates this |
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8 * particular file as subject to the "Classpath" exception as provided |
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9 * by Oracle in the LICENSE file that accompanied this code. |
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10 * |
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11 * This code is distributed in the hope that it will be useful, but WITHOUT |
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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14 * version 2 for more details (a copy is included in the LICENSE file that |
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15 * accompanied this code). |
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16 * |
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17 * You should have received a copy of the GNU General Public License version |
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18 * 2 along with this work; if not, write to the Free Software Foundation, |
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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20 * |
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21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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22 * or visit www.oracle.com if you need additional information or have any |
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23 * questions. |
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24 */ |
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25 |
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26 package jdk.jfr.api.flightrecorder; |
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27 |
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28 import static jdk.test.lib.Asserts.assertEquals; |
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29 |
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30 import jdk.jfr.Event; |
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31 import jdk.jfr.EventType; |
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32 import jdk.jfr.FlightRecorder; |
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33 |
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34 /* |
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35 * @test |
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36 * @key jfr |
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37 * @library /test/lib |
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38 * @run main/othervm jdk.jfr.api.flightrecorder.TestRegisterUnregisterEvent |
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39 */ |
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40 public class TestRegisterUnregisterEvent { |
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41 |
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42 public static void main(String[] args) throws Throwable { |
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43 // Register before Flight Recorder is started |
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44 FlightRecorder.register(MyEvent.class); |
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45 // Repeat |
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46 FlightRecorder.register(MyEvent.class); |
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47 |
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48 FlightRecorder recorder = FlightRecorder.getFlightRecorder(); |
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49 int count = 0; |
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50 for (EventType et : recorder.getEventTypes()) { |
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51 if (et.getName().equals(MyEvent.class.getName())) { |
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52 count++; |
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53 } |
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54 } |
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55 assertEquals(1, count); |
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56 |
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57 FlightRecorder.unregister(MyEvent.class); |
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58 |
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59 count = 0; |
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60 for (EventType et : recorder.getEventTypes()) { |
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61 if (et.getName().equals(MyEvent.class.getName())) { |
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62 count++; |
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63 } |
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64 } |
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65 assertEquals(0, count); |
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66 |
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67 FlightRecorder.register(MyEvent.class); |
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68 |
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69 count = 0; |
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70 for (EventType et : recorder.getEventTypes()) { |
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71 if (et.getName().equals(MyEvent.class.getName())) { |
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72 count++; |
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73 } |
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74 } |
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75 assertEquals(1, count); |
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76 |
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77 } |
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78 } |
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79 |
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80 class MyEvent extends Event { |
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81 } |