/* * Copyright (c) 1999, 2008, 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 javax.management;  /** * <p>Can be implemented by an MBean in order to * carry out operations before and after being registered or unregistered from * the MBean Server.  An MBean can also implement this interface in order * to get a reference to the MBean Server and/or its name within that * MBean Server.</p> * * @since 1.5 */public interface MBeanRegistration   {      /**     * Allows the MBean to perform any operations it needs before     * being registered in the MBean Server.  If the name of the MBean     * is not specified, the MBean can provide a name for its     * registration.  If any exception is raised, the MBean will not be     * registered in the MBean Server.     *     * @param server The MBean Server in which the MBean will be registered.     *     * @param name The object name of the MBean.  This name is null if     * the name parameter to one of the <code>createMBean</code> or     * <code>registerMBean</code> methods in the {@link MBeanServer}     * interface is null.  In that case, this method must return a     * non-null ObjectName for the new MBean.     *     * @return The name under which the MBean is to be registered.     * This value must not be null.  If the <code>name</code>     * parameter is not null, it will usually but not necessarily be     * the returned value.     *     * @exception java.lang.Exception This exception will be caught by     * the MBean Server and re-thrown as an {@link     * MBeanRegistrationException}.     */    public ObjectName preRegister(MBeanServer server,                                  ObjectName name) throws java.lang.Exception;     /**     * Allows the MBean to perform any operations needed after having been     * registered in the MBean server or after the registration has failed.     * <p>If the implementation of this method throws a {@link RuntimeException}     * or an {@link Error}, the MBean Server will rethrow those inside     * a {@link RuntimeMBeanException} or {@link RuntimeErrorException},     * respectively. However, throwing an exception in {@code postRegister}     * will not change the state of the MBean:     * if the MBean was already registered ({@code registrationDone} is     * {@code true}), the MBean will remain registered. </p>     * <p>This might be confusing for the code calling {@code createMBean()}     * or {@code registerMBean()}, as such code might assume that MBean     * registration has failed when such an exception is raised.     * Therefore it is recommended that implementations of     * {@code postRegister} do not throw Runtime Exceptions or Errors if it     * can be avoided.</p>     * @param registrationDone Indicates whether or not the MBean has     * been successfully registered in the MBean server. The value     * false means that the registration phase has failed.     */    public void postRegister(Boolean registrationDone);     /**     * Allows the MBean to perform any operations it needs before     * being unregistered by the MBean server.     *     * @exception java.lang.Exception This exception will be caught by     * the MBean server and re-thrown as an {@link     * MBeanRegistrationException}.     */    public void preDeregister() throws java.lang.Exception ;     /**     * Allows the MBean to perform any operations needed after having been     * unregistered in the MBean server.     * <p>If the implementation of this method throws a {@link RuntimeException}     * or an {@link Error}, the MBean Server will rethrow those inside     * a {@link RuntimeMBeanException} or {@link RuntimeErrorException},     * respectively. However, throwing an exception in {@code postDeregister}     * will not change the state of the MBean:     * the MBean was already successfully deregistered and will remain so. </p>     * <p>This might be confusing for the code calling     * {@code unregisterMBean()}, as it might assume that MBean deregistration     * has failed. Therefore it is recommended that implementations of     * {@code postDeregister} do not throw Runtime Exceptions or Errors if it     * can be avoided.</p>     */    public void postDeregister();  }