/*
* Copyright (c) 2003, 2004, 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>} method.
*
* <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>
*
* @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 {
/**
* 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);
}