| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| package org.apache.felix.mosgi.jmx.agent.mx4j.server.interceptor; |
| |
| import java.security.PrivilegedAction; |
| import java.security.AccessController; |
| |
| import javax.management.Attribute; |
| import javax.management.AttributeList; |
| import javax.management.AttributeNotFoundException; |
| import javax.management.InvalidAttributeValueException; |
| import javax.management.ListenerNotFoundException; |
| import javax.management.MBeanException; |
| import javax.management.MBeanInfo; |
| import javax.management.MBeanRegistrationException; |
| import javax.management.NotificationFilter; |
| import javax.management.NotificationListener; |
| import javax.management.ReflectionException; |
| |
| import org.apache.felix.mosgi.jmx.agent.mx4j.server.MBeanMetaData; |
| |
| /** |
| * This interceptor sets the context class loader to the proper value for incoming calls. |
| * It saves the current context class loader, set the context class loader to be the MBean's class loader for |
| * the current call, and on return re-set the context class loader to the previous value |
| * |
| * @author <a href="mailto:biorn_steedom@users.sourceforge.net">Simone Bordet</a> |
| * @version $Revision: 1.1.1.1 $ |
| */ |
| public class ContextClassLoaderMBeanServerInterceptor extends DefaultMBeanServerInterceptor |
| { |
| public ContextClassLoaderMBeanServerInterceptor() |
| { |
| // Disabled by default |
| setEnabled(false); |
| } |
| |
| public String getType() |
| { |
| return "contextclassloader"; |
| } |
| |
| public void addNotificationListener(MBeanMetaData metadata, NotificationListener listener, NotificationFilter filter, Object handback) |
| { |
| if (isEnabled()) |
| { |
| ClassLoader context = getContextClassLoader(); |
| if (metadata.classloader != context) |
| { |
| try |
| { |
| setContextClassLoader(metadata.classloader); |
| super.addNotificationListener(metadata, listener, filter, handback); |
| return; |
| } |
| finally |
| { |
| setContextClassLoader(context); |
| } |
| } |
| } |
| |
| super.addNotificationListener(metadata, listener, filter, handback); |
| } |
| |
| public void removeNotificationListener(MBeanMetaData metadata, NotificationListener listener) throws ListenerNotFoundException |
| { |
| if (isEnabled()) |
| { |
| ClassLoader context = getContextClassLoader(); |
| if (metadata.classloader != context) |
| { |
| try |
| { |
| setContextClassLoader(metadata.classloader); |
| super.removeNotificationListener(metadata, listener); |
| return; |
| } |
| finally |
| { |
| setContextClassLoader(context); |
| } |
| } |
| } |
| |
| super.removeNotificationListener(metadata, listener); |
| } |
| |
| public void removeNotificationListener(MBeanMetaData metadata, NotificationListener listener, NotificationFilter filter, Object handback) throws ListenerNotFoundException |
| { |
| if (isEnabled()) |
| { |
| ClassLoader context = getContextClassLoader(); |
| if (metadata.classloader != context) |
| { |
| try |
| { |
| setContextClassLoader(metadata.classloader); |
| super.removeNotificationListener(metadata, listener, filter, handback); |
| return; |
| } |
| finally |
| { |
| setContextClassLoader(context); |
| } |
| } |
| } |
| |
| super.removeNotificationListener(metadata, listener, filter, handback); |
| } |
| |
| public void instantiate(MBeanMetaData metadata, String className, String[] params, Object[] args) throws ReflectionException, MBeanException |
| { |
| if (isEnabled()) |
| { |
| ClassLoader context = getContextClassLoader(); |
| if (metadata.classloader != context) |
| { |
| try |
| { |
| setContextClassLoader(metadata.classloader); |
| super.instantiate(metadata, className, params, args); |
| return; |
| } |
| finally |
| { |
| setContextClassLoader(context); |
| } |
| } |
| } |
| |
| super.instantiate(metadata, className, params, args); |
| } |
| |
| public void registration(MBeanMetaData metadata, int operation) throws MBeanRegistrationException |
| { |
| if (isEnabled()) |
| { |
| ClassLoader context = getContextClassLoader(); |
| if (metadata.classloader != context) |
| { |
| try |
| { |
| setContextClassLoader(metadata.classloader); |
| super.registration(metadata, operation); |
| return; |
| } |
| finally |
| { |
| setContextClassLoader(context); |
| } |
| } |
| } |
| |
| super.registration(metadata, operation); |
| } |
| |
| public MBeanInfo getMBeanInfo(MBeanMetaData metadata) |
| { |
| if (isEnabled()) |
| { |
| ClassLoader context = getContextClassLoader(); |
| if (metadata.classloader != context) |
| { |
| try |
| { |
| setContextClassLoader(metadata.classloader); |
| return super.getMBeanInfo(metadata); |
| } |
| finally |
| { |
| setContextClassLoader(context); |
| } |
| } |
| } |
| |
| return super.getMBeanInfo(metadata); |
| } |
| |
| public Object invoke(MBeanMetaData metadata, String method, String[] params, Object[] args) throws MBeanException, ReflectionException |
| { |
| if (isEnabled()) |
| { |
| ClassLoader context = getContextClassLoader(); |
| if (metadata.classloader != context) |
| { |
| try |
| { |
| setContextClassLoader(metadata.classloader); |
| return super.invoke(metadata, method, params, args); |
| } |
| finally |
| { |
| setContextClassLoader(context); |
| } |
| } |
| } |
| |
| return super.invoke(metadata, method, params, args); |
| } |
| |
| public AttributeList getAttributes(MBeanMetaData metadata, String[] attributes) |
| { |
| if (isEnabled()) |
| { |
| ClassLoader context = getContextClassLoader(); |
| if (metadata.classloader != context) |
| { |
| try |
| { |
| setContextClassLoader(metadata.classloader); |
| return super.getAttributes(metadata, attributes); |
| } |
| finally |
| { |
| setContextClassLoader(context); |
| } |
| } |
| } |
| |
| return super.getAttributes(metadata, attributes); |
| } |
| |
| public AttributeList setAttributes(MBeanMetaData metadata, AttributeList attributes) |
| { |
| if (isEnabled()) |
| { |
| ClassLoader context = getContextClassLoader(); |
| if (metadata.classloader != context) |
| { |
| try |
| { |
| setContextClassLoader(metadata.classloader); |
| return super.setAttributes(metadata, attributes); |
| } |
| finally |
| { |
| setContextClassLoader(context); |
| } |
| } |
| } |
| |
| return super.setAttributes(metadata, attributes); |
| } |
| |
| public Object getAttribute(MBeanMetaData metadata, String attribute) throws MBeanException, AttributeNotFoundException, ReflectionException |
| { |
| if (isEnabled()) |
| { |
| ClassLoader context = getContextClassLoader(); |
| if (metadata.classloader != context) |
| { |
| try |
| { |
| setContextClassLoader(metadata.classloader); |
| return super.getAttribute(metadata, attribute); |
| } |
| finally |
| { |
| setContextClassLoader(context); |
| } |
| } |
| } |
| |
| return super.getAttribute(metadata, attribute); |
| } |
| |
| public void setAttribute(MBeanMetaData metadata, Attribute attribute) throws MBeanException, AttributeNotFoundException, InvalidAttributeValueException, ReflectionException |
| { |
| if (isEnabled()) |
| { |
| ClassLoader context = getContextClassLoader(); |
| if (metadata.classloader != context) |
| { |
| try |
| { |
| setContextClassLoader(metadata.classloader); |
| super.setAttribute(metadata, attribute); |
| return; |
| } |
| finally |
| { |
| setContextClassLoader(context); |
| } |
| } |
| } |
| |
| super.setAttribute(metadata, attribute); |
| } |
| |
| private ClassLoader getContextClassLoader() |
| { |
| return Thread.currentThread().getContextClassLoader(); |
| } |
| |
| private void setContextClassLoader(final ClassLoader cl) |
| { |
| AccessController.doPrivileged(new PrivilegedAction() |
| { |
| public Object run() |
| { |
| Thread.currentThread().setContextClassLoader(cl); |
| return null; |
| } |
| }); |
| } |
| } |