| /* |
| * Copyright (c) 2007, 2010, 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 com.sun.org.glassfish.gmbal ; |
| |
| import java.lang.annotation.Documented ; |
| import java.lang.annotation.Target ; |
| import java.lang.annotation.ElementType ; |
| import java.lang.annotation.Retention ; |
| import java.lang.annotation.RetentionPolicy ; |
| |
| /** This annotation defines an attribute in either CompositeData (ManagedData) or |
| * an open MBean (ManagedObject). An attribute may be read/write (has a setter |
| * and a getter), read only (only has a getter), |
| * or write only (only has a setter) depending on the declared methods in the class. |
| * <p> |
| * A method defines a getter if it returns a non-void type and takes no argument types. |
| * Likewise a method defines a setter if it return void and takes exactly one |
| * argument. |
| * <p>An id is derived from a method name as follows: |
| * <ol> |
| * <li>If the method is a getter, and has a name of the form getXXX, the derived |
| * id is xXX (note the initial lower case change). |
| * <li>If the method is a getter with a boolean return type, and has a name of |
| * the form isXXX, the derived id is xXX |
| * <li>If the method is a setter, and has a name of the form setXXX, the |
| * detived id is xXX. |
| * <li>Otherwise the derived ID is the method name. |
| * </ol> |
| * <p> |
| * In certain cases, a field annotated with @ManagedAttribute |
| * may also represent a read-only attribute. |
| * The field must be final, and its type must be one of: |
| * <ol> |
| * <li>A primitive type (boolean, byte, short, char, int, long, float, double) |
| * <li>A primitive type wrapper (Boolean, Byte, Short, Character, Integer, |
| * Long, Float, Double) |
| * <li>A String |
| * <li>A BigDecimal or BigInteger |
| * <li>A java.util.Date |
| * <li>An ObjectName |
| * <li>An enum (which is translated to its ordinal name) |
| * </ol> |
| * Any such field can be accessed safely by multiple threads, because its value |
| * cannot change after an instance of the containing class has completed its |
| * constructor. Note that Date is not truly immutable (it should be!), but it's |
| * one of the Open MBean simple types, so it is included here. |
| */ |
| @Documented |
| @Target({ElementType.METHOD,ElementType.FIELD}) |
| @Retention(RetentionPolicy.RUNTIME) |
| public @interface ManagedAttribute { |
| /** The id of the attribute. Defaults to value derived from method name. |
| * @return The id (default ""). |
| */ |
| String id() default "" ; |
| } |