| /* |
| * Copyright (c) 2003, 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 java.lang.management; |
| |
| /** |
| * The management interface for the class loading system of |
| * the Java virtual machine. |
| * |
| * <p> A Java virtual machine has a single instance of the implementation |
| * class of this interface. This instance implementing this interface is |
| * an <a href="ManagementFactory.html#MXBean">MXBean</a> |
| * that can be obtained by calling |
| * the {@link ManagementFactory#getClassLoadingMXBean} method or |
| * from the {@link ManagementFactory#getPlatformMBeanServer |
| * platform <tt>MBeanServer</tt>}. |
| * |
| * <p>The <tt>ObjectName</tt> for uniquely identifying the MXBean for |
| * the class loading system within an <tt>MBeanServer</tt> is: |
| * <blockquote> |
| * {@link ManagementFactory#CLASS_LOADING_MXBEAN_NAME |
| * <tt>java.lang:type=ClassLoading</tt>} |
| * </blockquote> |
| * |
| * It can be obtained by calling the |
| * {@link PlatformManagedObject#getObjectName} method. |
| * |
| * @see ManagementFactory#getPlatformMXBeans(Class) |
| * @see <a href="../../../javax/management/package-summary.html"> |
| * JMX Specification.</a> |
| * @see <a href="package-summary.html#examples"> |
| * Ways to Access MXBeans</a> |
| * |
| * @author Mandy Chung |
| * @since 1.5 |
| */ |
| public interface ClassLoadingMXBean extends PlatformManagedObject { |
| |
| /** |
| * Returns the total number of classes that have been loaded since |
| * the Java virtual machine has started execution. |
| * |
| * @return the total number of classes loaded. |
| * |
| */ |
| public long getTotalLoadedClassCount(); |
| |
| /** |
| * Returns the number of classes that are currently loaded in the |
| * Java virtual machine. |
| * |
| * @return the number of currently loaded classes. |
| */ |
| public int getLoadedClassCount(); |
| |
| /** |
| * Returns the total number of classes unloaded since the Java virtual machine |
| * has started execution. |
| * |
| * @return the total number of unloaded classes. |
| */ |
| public long getUnloadedClassCount(); |
| |
| /** |
| * Tests if the verbose output for the class loading system is enabled. |
| * |
| * @return <tt>true</tt> if the verbose output for the class loading |
| * system is enabled; <tt>false</tt> otherwise. |
| */ |
| public boolean isVerbose(); |
| |
| /** |
| * Enables or disables the verbose output for the class loading |
| * system. The verbose output information and the output stream |
| * to which the verbose information is emitted are implementation |
| * dependent. Typically, a Java virtual machine implementation |
| * prints a message each time a class file is loaded. |
| * |
| * <p>This method can be called by multiple threads concurrently. |
| * Each invocation of this method enables or disables the verbose |
| * output globally. |
| * |
| * @param value <tt>true</tt> to enable the verbose output; |
| * <tt>false</tt> to disable. |
| * |
| * @exception java.lang.SecurityException if a security manager |
| * exists and the caller does not have |
| * ManagementPermission("control"). |
| */ |
| public void setVerbose(boolean value); |
| |
| } |