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.util.ArrayList;
  29 import java.util.List;
  30 
  31 import jdk.jfr.Recording;
  32 import jdk.test.lib.jfr.SimpleEventHelper;
  33 
  34 /**
  35  * @test
  36  * @summary Enable, disable, enable event during recording.
  37  * @key jfr
  38  * @requires vm.hasJFR
  39  * @library /test/lib
  40  * @run main/othervm jdk.jfr.api.recording.event.TestReEnableClass
  41  */
  42 public class TestReEnableClass {
  43 
  44     public static void main(String[] args) throws Throwable {
  45         test(false);
  46         test(true);
  47     }
  48 
  49     // Loop and enable/disable events.
  50     // Verify recording only contains event created during enabled.
  51     private static void test(boolean isEnabled) throws Exception {
  52         System.out.println("Start with isEnabled = " + isEnabled);
  53 
  54         List<Integer> expectedIds = new ArrayList<>();
  55         Recording r = new Recording();
  56         SimpleEventHelper.enable(r, isEnabled);
  57         r.start();
  58 
  59         for (int i = 0; i < 10; ++i) {
  60             SimpleEventHelper.createEvent(i);
  61             if (isEnabled) {
  62                 expectedIds.add(i);
  63             }
  64             isEnabled = !isEnabled;
  65             SimpleEventHelper.enable(r, isEnabled);
  66         }
  67 
  68         r.stop();
  69         SimpleEventHelper.createEvent(100);
  70 
  71         int[] ids = new int[expectedIds.size()];
  72         for (int i = 0; i < expectedIds.size(); ++i) {
  73             ids[i] = expectedIds.get(i);
  74         }
  75         SimpleEventHelper.verifyEvents(r, ids);
  76 
  77         r.close();
  78     }
  79 
  80 }