--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/jdk.jfr/share/classes/jdk/jfr/internal/settings/EnabledSetting.java	Tue May 15 20:24:34 2018 +0200
@@ -0,0 +1,75 @@
+/*
+ * Copyright (c) 2016, 2018, 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
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+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;
+import jdk.jfr.internal.Control;
+
+@MetadataDefinition
+@Label("Enabled")
+@Description("Record event")
+@Name(Type.SETTINGS_PREFIX + "Enabled")
+@BooleanFlag
+public final class EnabledSetting extends Control {
+    private final BooleanValue booleanValue;
+    private final PlatformEventType eventType;
+
+    public EnabledSetting(PlatformEventType eventType, String defaultValue) {
+        super(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();
+    }
+}