/* * Copyright (c) 1999, 2007, 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.monitor; // jmx imports//import javax.management.ObjectName; /** * Exposes the remote management interface of monitor MBeans. * * * @since 1.5 */public interface MonitorMBean {     /**     * Starts the monitor.     */    public void start();     /**     * Stops the monitor.     */    public void stop();     // GETTERS AND SETTERS    //--------------------     /**     * Adds the specified object in the set of observed MBeans.     *     * @param object The object to observe.     * @exception java.lang.IllegalArgumentException the specified object is null.     *     */    public void addObservedObject(ObjectName object) throws java.lang.IllegalArgumentException;     /**     * Removes the specified object from the set of observed MBeans.     *     * @param object The object to remove.     *     */    public void removeObservedObject(ObjectName object);     /**     * Tests whether the specified object is in the set of observed MBeans.     *     * @param object The object to check.     * @return <CODE>true</CODE> if the specified object is in the set, <CODE>false</CODE> otherwise.     *     */    public boolean containsObservedObject(ObjectName object);     /**     * Returns an array containing the objects being observed.     *     * @return The objects being observed.     *     */    public ObjectName[] getObservedObjects();     /**     * Gets the object name of the object being observed.     *     * @return The object being observed.     *     * @see #setObservedObject     *     * @deprecated As of JMX 1.2, replaced by {@link #getObservedObjects}     */    @Deprecated    public ObjectName getObservedObject();     /**     * Sets the object to observe identified by its object name.     *     * @param object The object to observe.     *     * @see #getObservedObject     *     * @deprecated As of JMX 1.2, replaced by {@link #addObservedObject}     */    @Deprecated    public void setObservedObject(ObjectName object);     /**     * Gets the attribute being observed.     *     * @return The attribute being observed.     *     * @see #setObservedAttribute     */    public String getObservedAttribute();     /**     * Sets the attribute to observe.     *     * @param attribute The attribute to observe.     *     * @see #getObservedAttribute     */    public void setObservedAttribute(String attribute);     /**     * Gets the granularity period (in milliseconds).     *     * @return The granularity period.     *     * @see #setGranularityPeriod     */    public long getGranularityPeriod();     /**     * Sets the granularity period (in milliseconds).     *     * @param period The granularity period.     * @exception java.lang.IllegalArgumentException The granularity     * period is less than or equal to zero.     *     * @see #getGranularityPeriod     */    public void setGranularityPeriod(long period) throws java.lang.IllegalArgumentException;     /**     * Tests if the monitor MBean is active.     * A monitor MBean is marked active when the {@link #start start} method is called.     * It becomes inactive when the {@link #stop stop} method is called.     *     * @return <CODE>true</CODE> if the monitor MBean is active, <CODE>false</CODE> otherwise.     */    public boolean isActive();}