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/* TestClassLoading.java -- Tests the class loading bean.
Copyright (C) 2006 Free Software Foundation, Inc.
This file is part of GNU Classpath examples.
GNU Classpath is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
GNU Classpath 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 for more details.
You should have received a copy of the GNU General Public License
along with GNU Classpath; see the file COPYING. If not, write to the
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301 USA. */
package gnu.classpath.examples.management;
import java.lang.management.ClassLoadingMXBean;
import java.lang.management.ManagementFactory;
import static java.lang.management.ManagementFactory.CLASS_LOADING_MXBEAN_NAME;
import javax.management.Attribute;
import javax.management.MBeanServer;
import javax.management.ObjectName;
public class TestClassLoading
{
public static void main(String[] args)
throws Exception
{
System.out.println("Testing locally...");
ClassLoadingMXBean bean = ManagementFactory.getClassLoadingMXBean();
System.out.println("Bean: " + bean);
System.out.println("Loaded classes: " + bean.getLoadedClassCount());
System.out.println("Unloaded classes: " + bean.getUnloadedClassCount());
System.out.println("Total loaded classes: " + bean.getTotalLoadedClassCount());
boolean verbosity = bean.isVerbose();
System.out.println("Verbose class output: " + (verbosity ? "yes" : "no"));
System.out.println("Changing verbose setting...");
bean.setVerbose(!verbosity);
System.out.println("Verbose class output: " + (bean.isVerbose() ? "yes" : "no"));
System.out.println("Testing via the server...");
MBeanServer server = ManagementFactory.getPlatformMBeanServer();
ObjectName classBean = new ObjectName(CLASS_LOADING_MXBEAN_NAME);
System.out.println("Bean: " + classBean);
System.out.println("Loaded classes: " + server.getAttribute(classBean, "LoadedClassCount"));
System.out.println("Unloaded classes: " + server.getAttribute(classBean,
"UnloadedClassCount"));
System.out.println("Total loaded classes: " + server.getAttribute(classBean,
"TotalLoadedClassCount"));
verbosity = (Boolean) server.getAttribute(classBean, "Verbose");
System.out.println("Verbose class output: " + (verbosity ? "yes" : "no"));
System.out.println("Changing verbose setting...");
server.setAttribute(classBean, new Attribute("Verbose", !verbosity));
System.out.println("Verbose class output: " + ((Boolean)
server.getAttribute(classBean, "Verbose") ?
"yes" : "no"));
System.out.println("Testing via the proxy...");
bean = ManagementFactory.newPlatformMXBeanProxy(server, CLASS_LOADING_MXBEAN_NAME,
ClassLoadingMXBean.class);
System.out.println("Bean: " + bean);
System.out.println("Loaded classes: " + bean.getLoadedClassCount());
System.out.println("Unloaded classes: " + bean.getUnloadedClassCount());
System.out.println("Total loaded classes: " + bean.getTotalLoadedClassCount());
verbosity = bean.isVerbose();
System.out.println("Verbose class output: " + (verbosity ? "yes" : "no"));
System.out.println("Changing verbose setting...");
bean.setVerbose(!verbosity);
System.out.println("Verbose class output: " + (bean.isVerbose() ? "yes" : "no"));
}
}
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