1 /* 2 * Copyright (c) 2016, 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; 27 28 import java.lang.annotation.ElementType; 29 import java.lang.annotation.Inherited; 30 import java.lang.annotation.Retention; 31 import java.lang.annotation.RetentionPolicy; 32 import java.lang.annotation.Target; 33 34 /** 35 * Event annotation, determines if an event should be enabled by default. 36 * <p> 37 * If an event doesn't have the annotation, then by default the event is enabled. 38 * 39 * @since 9 40 */ 41 @Target({ ElementType.TYPE }) 42 @Retention(RetentionPolicy.RUNTIME) 43 @Inherited 44 @MetadataDefinition 45 public @interface Enabled { 46 /** 47 * Setting name {@code "enabled"}, signifies that the event should be 48 * recorded. 49 */ 50 public final static String NAME = "enabled"; 51 52 /** 53 * Returns {@code true} if by default the event should be enabled, {@code false} otherwise. 54 * 55 * @return {@code true} if by default the event should be enabled by default, {@code false} otherwise 56 */ 57 boolean value() default true; 58 }