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.event;
  27 
  28 import java.nio.file.Files;
  29 import java.nio.file.Path;
  30 import java.nio.file.Paths;
  31 import java.util.Random;
  32 
  33 import jdk.jfr.EventType;
  34 import jdk.jfr.Recording;
  35 import jdk.test.lib.Asserts;
  36 import jdk.test.lib.jfr.SimpleEvent;
  37 import jdk.test.lib.jfr.SimpleEventHelper;
  38 
  39 /**
  40  * @test
  41  * @summary Enable, disable, enable event during recording.
  42  * @key jfr
  43  *
  44  * @library /lib /
  45  * @run main/othervm jdk.jfr.api.recording.event.TestRecordingEnableDisable
  46  */
  47 public class TestRecordingEnableDisable {
  48     private static final String EVENT_PATH = "java.file_write";
  49     private static final Random rand = new Random(0);
  50 
  51     public static void main(String[] args) throws Throwable {
  52 
  53         Recording rA = new Recording();
  54         Recording rB = new Recording();
  55 
  56         rA.setName("rA");
  57         rB.setName("rB");
  58 
  59         final Path path = Paths.get(".", "my.jfr");
  60         rA.start();
  61         rB.start();
  62 
  63         for (int i = 0; i < 30; ++i) {
  64             SimpleEventHelper.createEvent(i);
  65             if (isMyEventEnabled(rA, rB)) {
  66                 System.out.println("MyEvent enabled");
  67             }
  68             else {
  69                 System.out.println("MyEvent disabled");
  70             }
  71 
  72             Files.write(path, "A".getBytes());
  73             if (isIoEnabled(rA, rB)) {
  74                 System.out.println("IoEvent enabled");
  75             }
  76             else {
  77                 System.out.println("IoEvent disabled");
  78             }
  79             Recording r = ((i % 2) == 0) ? rA : rB;
  80             updateSettings(r);
  81         }
  82 
  83         rA.stop();
  84         rB.stop();
  85         rA.close();
  86         rB.close();
  87     }
  88 
  89 
  90     private static void updateSettings(Recording r) {
  91         int operationIndex = rand.nextInt(4);
  92         switch (operationIndex) {
  93             case 0:
  94                 SimpleEventHelper.enable(r, true);
  95                 break;
  96             case 1:
  97                 SimpleEventHelper.enable(r, false);
  98                 break;
  99             case 2:
 100                 r.enable(EVENT_PATH).withoutStackTrace();
 101                 break;
 102             case 3:
 103                 r.disable(EVENT_PATH);
 104                 break;
 105             default:
 106                 Asserts.fail("Wrong operataionIndex. Test error");
 107             }
 108     }
 109 
 110     private static boolean isMyEventEnabled(Recording rA, Recording rB) {
 111         long eventTypeId = EventType.getEventType(SimpleEvent.class).getId();
 112         String settingName = "@" + eventTypeId + "#enabled";
 113         return isEnabled(rA, settingName) || isEnabled(rB, settingName);
 114     }
 115 
 116     private static boolean isIoEnabled(Recording rA, Recording rB) {
 117         String settingName = EVENT_PATH + "#enabled";
 118         return isEnabled(rA, settingName) || isEnabled(rB, settingName);
 119     }
 120 
 121     private static boolean isEnabled(Recording r, String settingName) {
 122         System.out.printf("R(%s) %s=%s%n", r.getName(), settingName, r.getSettings().get(settingName));
 123         return Boolean.parseBoolean(r.getSettings().get(settingName));
 124     }
 125 }