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 
  32 import jdk.jfr.Recording;
  33 import jdk.jfr.consumer.RecordedEvent;
  34 import jdk.test.lib.Asserts;
  35 import jdk.test.lib.jfr.EventNames;
  36 import jdk.test.lib.jfr.Events;
  37 
  38 /**
  39  * @test
  40  * @summary Enable/disable event by name during recording.
  41  * @key jfr
  42  *
  43  * @library /lib /
  44  * @run main/othervm jdk.jfr.api.recording.event.TestReEnableName
  45  */
  46 public class TestReEnableName {
  47 
  48     public static void main(String[] args) throws Throwable {
  49         testRecordingWithEnabledEvent(EventNames.FileWrite, false);
  50         testRecordingWithEnabledEvent(EventNames.FileWrite, true);
  51     }
  52 
  53     // Loop and enable/disable events. Create events each loop.
  54     // Verify we only get events created during enabled.
  55     private static void testRecordingWithEnabledEvent(String eventname, boolean enabled) throws Exception {
  56         System.out.println("Testing enabled=" + enabled + " for " + eventname);
  57         final Path pathDisabled = Paths.get(".", "disabled.txt").toAbsolutePath();
  58         final Path pathEnabled = Paths.get(".", "enabled.txt").toAbsolutePath();
  59 
  60         Recording r = new Recording();
  61         if (enabled) {
  62             r.enable(eventname).withoutThreshold().withoutStackTrace();
  63         } else {
  64             r.disable(eventname).withoutThreshold().withoutStackTrace();
  65         }
  66         r.start();
  67 
  68         // We should only get events for pathEnabled, not for pathDisabled.
  69         int countExpectedEvents = 0;
  70         for (int i = 0; i < 10; ++i) {
  71             if (enabled) {
  72                 Files.write(pathEnabled, "E".getBytes());
  73                 ++countExpectedEvents;
  74                 r.disable(eventname);
  75             } else {
  76                 Files.write(pathDisabled, "D".getBytes());
  77                 r.enable(eventname);
  78             }
  79             enabled = !enabled;
  80         }
  81         r.stop();
  82 
  83         int countFoundEvents = 0;
  84         for (RecordedEvent event : Events.fromRecording(r)) {
  85             System.out.printf("Event %s%n", event);
  86             Asserts.assertEquals(eventname, event.getEventType().getName(), "Wrong event type");
  87             String path = Events.assertField(event, "path").getValue();
  88             System.out.println(path);
  89             if (pathEnabled.toString().equals(path)) {
  90                 ++countFoundEvents;
  91             }
  92         }
  93         Asserts.assertGreaterThanOrEqual(countFoundEvents, countExpectedEvents, "Too few events found");
  94 
  95         r.close();
  96     }
  97 }