1 /*
   2  * Copyright (c) 2016, 2019, 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.internal.settings;
  27 
  28 import java.util.Objects;
  29 import java.util.Set;
  30 
  31 import jdk.jfr.Description;
  32 import jdk.jfr.BooleanFlag;
  33 import jdk.jfr.Label;
  34 import jdk.jfr.MetadataDefinition;
  35 import jdk.jfr.Name;
  36 import jdk.jfr.internal.PlatformEventType;
  37 import jdk.jfr.internal.Control;
  38 
  39 @MetadataDefinition
  40 @Label("Enabled")
  41 @Description("Record event")
  42 @Name("com.oracle.jfr.settings.Enabled")
  43 @BooleanFlag
  44 public final class EnabledSetting extends Control {
  45     private final BooleanValue booleanValue;
  46     private final PlatformEventType eventType;
  47 
  48     public EnabledSetting(PlatformEventType eventType, String defaultValue) {
  49         super(defaultValue);
  50         this.booleanValue = BooleanValue.valueOf(defaultValue);
  51         this.eventType = Objects.requireNonNull(eventType);
  52     }
  53 
  54     @Override
  55     public String combine(Set<String> values) {
  56         return booleanValue.union(values);
  57     }
  58 
  59     @Override
  60     public void setValue(String value) {
  61         booleanValue.setValue(value);
  62         eventType.setEnabled(booleanValue.getBoolean());
  63         if (eventType.isEnabled() && !eventType.isJVM()) {
  64             if (!eventType.isInstrumented()) {
  65                 eventType.markForInstrumentation(true);
  66             }
  67         }
  68     }
  69 
  70     @Override
  71     public String getValue() {
  72         return booleanValue.getValue();
  73     }
  74 }