src/jdk.jfr/share/classes/jdk/jfr/internal/settings/EnabledSetting.java

/*
 * Copyright (c) 2016, 2020, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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package jdk.jfr.internal.settings;

import java.util.Objects;
import java.util.Set;

import jdk.jfr.Description;
import jdk.jfr.BooleanFlag;
import jdk.jfr.Label;
import jdk.jfr.MetadataDefinition;
import jdk.jfr.Name;
import jdk.jfr.internal.PlatformEventType;
import jdk.jfr.internal.Type;

@MetadataDefinition
@Label("Enabled")
@Description("Record event")
@Name(Type.SETTINGS_PREFIX + "Enabled")
@BooleanFlag
public final class EnabledSetting extends JDKSettingControl {
    private final BooleanValue booleanValue;
    private final PlatformEventType eventType;

    public EnabledSetting(PlatformEventType eventType, String defaultValue) {
        this.booleanValue = BooleanValue.valueOf(defaultValue);
        this.eventType = Objects.requireNonNull(eventType);
    }

    @Override
    public String combine(Set<String> values) {
        return booleanValue.union(values);
    }

    @Override
    public void setValue(String value) {
        booleanValue.setValue(value);
        eventType.setEnabled(booleanValue.getBoolean());
        if (eventType.isEnabled() && !eventType.isJVM()) {
            if (!eventType.isInstrumented()) {
                eventType.markForInstrumentation(true);
            }
        }
    }

    @Override
    public String getValue() {
        return booleanValue.getValue();
    }
}