Example usage for javax.management MBeanServer getClassLoaderFor

Introduction

In this page you can find the example usage for javax.management MBeanServer getClassLoaderFor.

Prototype

public ClassLoader getClassLoaderFor(ObjectName mbeanName) throws InstanceNotFoundException;

Source Link

Document

Return the java.lang.ClassLoader that was used for loading the class of the named MBean.

Usage

From source file:com.meltmedia.cadmium.servlets.ClassLoaderLeakPreventor.java

/**
 * Unregister MBeans loaded by the web application class loader
 *///from   www  .j  ava2 s.c om
protected void unregisterMBeans() {
    try {
        MBeanServer mBeanServer = ManagementFactory.getPlatformMBeanServer();
        final Set<ObjectName> allMBeanNames = mBeanServer.queryNames(new ObjectName("*:*"), null);
        for (ObjectName objectName : allMBeanNames) {
            try {
                final ClassLoader mBeanClassLoader = mBeanServer.getClassLoaderFor(objectName);
                if (isWebAppClassLoaderOrChild(mBeanClassLoader)) { // MBean loaded in web application
                    warn("MBean '" + objectName + "' was loaded in web application; unregistering");
                    mBeanServer.unregisterMBean(objectName);
                }
            } catch (Exception e) { // MBeanRegistrationException / InstanceNotFoundException
                error(e);
            }
        }
    } catch (Exception e) { // MalformedObjectNameException
        error(e);
    }
}

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From source file:se.jiderhamn.classloader.leak.prevention.ClassLoaderLeakPreventor.java

/** Unregister MBeans loaded by the web application class loader */
protected void unregisterMBeans() {
    try {//w  w w.  j a  v a2  s . c  om
        JettyJMXRemover jettyJMXRemover = null;
        // If you enable jmx support in jetty 8 or 9  some mbeans (e.g. for the servletholder or sessionmanager) are instanciated in the web application thread 
        // and a reference to the WebappClassloader is stored in a private ObjectMBean._loader which is unfortunatly not the classloader that loaded the class.
        // So for unregisterMBeans to work even for the jetty mbeans we need to access the MBeanContainer class of the jetty container.  
        try {
            jettyJMXRemover = new JettyJMXRemover(getWebApplicationClassLoader());
        } catch (Exception ex) {
            error(ex);
        }

        MBeanServer mBeanServer = ManagementFactory.getPlatformMBeanServer();
        final Set<ObjectName> allMBeanNames = mBeanServer.queryNames(new ObjectName("*:*"), null);
        for (ObjectName objectName : allMBeanNames) {
            try {
                if (jettyJMXRemover != null && jettyJMXRemover.unregisterJettyJMXBean(objectName)) {
                    continue;
                }
                final ClassLoader mBeanClassLoader = mBeanServer.getClassLoaderFor(objectName);
                if (isWebAppClassLoaderOrChild(mBeanClassLoader)) { // MBean loaded in web application
                    warn("MBean '" + objectName + "' was loaded in web application; unregistering");
                    mBeanServer.unregisterMBean(objectName);
                }
            } catch (Exception e) { // MBeanRegistrationException / InstanceNotFoundException
                error(e);
            }
        }
    } catch (Exception e) { // MalformedObjectNameException
        error(e);
    }
}

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