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.flightrecorder;
  27 
  28 import static jdk.test.lib.Asserts.assertEquals;
  29 import static jdk.test.lib.Asserts.assertTrue;
  30 
  31 import java.time.Duration;
  32 import java.util.Map;
  33 
  34 import jdk.jfr.Event;
  35 import jdk.jfr.EventType;
  36 import jdk.jfr.Recording;
  37 
  38 /**
  39  * @test
  40  * @key jfr
  41  * @requires vm.hasJFR
  42  * @library /test/lib
  43  * @run main/othervm jdk.jfr.api.flightrecorder.TestGetSettings
  44  */
  45 public class TestGetSettings {
  46 
  47     public static void main(String[] args) throws Throwable {
  48         final long minThresholdNanos = 1000000;
  49         final String dummyEventPath = "mydummy/event/path";
  50         final String myEventSettingName = String.valueOf(EventType.getEventType(MyEvent.class).getId());
  51         System.out.println("myEventSettingName=" + myEventSettingName);
  52 
  53         // Settings should be merged to include the most number of events (minimum threshold).
  54         Recording r1 = new Recording();
  55         r1.enable(MyEvent.class).withThreshold(Duration.ofNanos(minThresholdNanos * 3));
  56         r1.enable(MyEvent.class).withThreshold(Duration.ofNanos(minThresholdNanos * 2));
  57         r1.enable(dummyEventPath).withThreshold(Duration.ofNanos(minThresholdNanos));
  58         r1.start();
  59 
  60         ExpectedSetting[] expectedR1 = {
  61             new ExpectedSetting(myEventSettingName, "enabled", "true"),
  62             new ExpectedSetting(myEventSettingName, "threshold", Long.toString(minThresholdNanos * 2) + " ns"),
  63             new ExpectedSetting(dummyEventPath, "enabled", "true"),
  64             new ExpectedSetting(dummyEventPath, "threshold", Long.toString(minThresholdNanos) + " ns"),
  65         };
  66 
  67         verifySettings(r1.getSettings(), expectedR1);
  68 
  69         // Start another recording. Recorder settings should be merged from both recordings.
  70         Recording r2 = new Recording();
  71         r2.enable(MyEvent.class).withThreshold(Duration.ofNanos(minThresholdNanos));
  72         r2.disable(dummyEventPath);
  73         r2.start();
  74 
  75         ExpectedSetting[] expectedR2 = {
  76             new ExpectedSetting(myEventSettingName, "enabled", "true"),
  77             new ExpectedSetting(myEventSettingName, "threshold", Long.toString(minThresholdNanos) + " ns"),
  78             new ExpectedSetting(dummyEventPath, "enabled", "false")
  79         };
  80 
  81         verifySettings(r1.getSettings(), expectedR1);
  82         verifySettings(r2.getSettings(), expectedR2);
  83 
  84         // Stop first recording. Recorder should use settings from r2.
  85         r1.stop();
  86         verifySettings(r2.getSettings(), expectedR2);
  87 
  88         r2.stop();
  89         r1.close();
  90         r2.close();
  91     }
  92 
  93     private static void verifySettings(Map<String, String> settings, ExpectedSetting ... expectedSettings) {
  94         for (String name : settings.keySet()) {
  95             System.out.printf("Settings: %s=%s%n", name, settings.get(name));
  96         }
  97         for (ExpectedSetting expected : expectedSettings) {
  98             boolean isFound = false;
  99             for (String name : settings.keySet()) {
 100                 if (name.contains(expected.name) && name.contains(expected.option)) {
 101                     final String value = settings.get(name);
 102                     String msg = String.format("got: %s=%s, expected: %s", name, value, expected.toString());
 103                     assertEquals(value, expected.value, msg);
 104                     System.out.println("OK: " + msg);
 105                     isFound = true;
 106                     break;
 107                 }
 108             }
 109             assertTrue(isFound, "Missing setting " + expected.toString());
 110         }
 111     }
 112 
 113     private static class MyEvent extends Event {
 114     }
 115 
 116     private static class ExpectedSetting {
 117         String name;
 118         String option;
 119         String value;
 120 
 121         public ExpectedSetting(String name, String option, String value) {
 122             this.name = name;
 123             this.option = option;
 124             this.value = value;
 125         }
 126 
 127         @Override
 128         public String toString() {
 129             return String.format("name=%s, option=%s, value=%s", name, option, value);
 130         }
 131     }
 132 }