| /* |
| * Copyright (c) 2003, 2015, 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. |
| * |
| * 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 |
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| */ |
| |
| /* |
| * @test |
| * @bug 4910428 |
| * @summary Tests target MBean class loader used before JSR 160 loader |
| * @author Eamonn McManus |
| * |
| * @run clean TargetMBeanTest |
| * @run build TargetMBeanTest |
| * @run main TargetMBeanTest |
| */ |
| |
| /* |
| The JSR 160 spec says that, when invoking a method (or setting an |
| attribute or creating) on a target MBean, that MBean's class loader |
| is used to deserialize parameters. The problem is that the RMI |
| connector protocol wraps these parameters as MarshalledObjects. |
| When you call get() on a MarshalledObject, the context class loader |
| is used to deserialize, so if we set this to the target MBean's |
| class loader everything should work. EXCEPT that MarshalledObject |
| first tries to load classes using the first class loader it finds in |
| the caller's stack. If our JSR 160 implementation is part of J2SE, |
| it will not find any such class loader (only the system class |
| loader). But if it's standalone, then it will find the class loader |
| of the JSR 160 implementation. If the class name of a parameter is |
| known to both the 160 loader and the target MBean loader, then we |
| will use the wrong loader for deserialization and the attempt to |
| invoke the target MBean with the deserialized object will fail. |
| |
| We test this as follows. We fabricate an MLet that has the same set |
| of URLs as the 160 class loader, which we assume is the system class |
| loader (or at least, it is a URLClassLoader). This MLet is |
| therefore a "shadow class loader" -- for every class name known to |
| the 160 class loader, it can load the same name, but the result is |
| not the same class, since it has not been loaded by the same loader. |
| Then, we use the MLet to create an RMIConnectorServer MBean. This |
| MBean is an instance of "shadow RMIConnectorServer", and its |
| constructor has a parameter of type "shadow JMXServiceURL". If the |
| constructor is invoked with "real JMXServiceURL" it will fail. |
| |
| While we are at it, we also test that the behaviour is correct for |
| the JMXMP protocol, if that optional protocol is present. |
| */ |
| import java.lang.reflect.*; |
| import java.net.*; |
| import java.util.*; |
| import javax.management.*; |
| import javax.management.loading.*; |
| import javax.management.remote.*; |
| import javax.management.remote.rmi.RMIConnectorServer; |
| |
| public class TargetMBeanTest { |
| private static final ObjectName mletName; |
| static { |
| try { |
| mletName = new ObjectName("x:type=mlet"); |
| } catch (Exception e) { |
| e.printStackTrace(); |
| throw new Error(); |
| } |
| } |
| |
| public static void main(String[] args) throws Exception { |
| System.out.println("Test that target MBean class loader is used " + |
| "before JMX Remote API class loader"); |
| |
| ClassLoader jmxRemoteClassLoader = |
| JMXServiceURL.class.getClassLoader(); |
| if (jmxRemoteClassLoader == null) { |
| System.out.println("JMX Remote API loaded by bootstrap " + |
| "class loader, this test is irrelevant"); |
| return; |
| } |
| if (!(jmxRemoteClassLoader instanceof URLClassLoader)) { |
| System.out.println("TEST INVALID: JMX Remote API not loaded by " + |
| "URLClassLoader"); |
| System.exit(1); |
| } |
| |
| URLClassLoader jrcl = (URLClassLoader) jmxRemoteClassLoader; |
| URL[] urls = jrcl.getURLs(); |
| PrivateMLet mlet = new PrivateMLet(urls, null, false); |
| Class shadowClass = mlet.loadClass(JMXServiceURL.class.getName()); |
| if (shadowClass == JMXServiceURL.class) { |
| System.out.println("TEST INVALID: MLet got original " + |
| "JMXServiceURL not shadow"); |
| System.exit(1); |
| } |
| |
| MBeanServer mbs = MBeanServerFactory.newMBeanServer(); |
| mbs.registerMBean(mlet, mletName); |
| |
| final String[] protos = {"rmi", "iiop", "jmxmp"}; |
| boolean ok = true; |
| for (int i = 0; i < protos.length; i++) { |
| try { |
| ok &= test(protos[i], mbs); |
| } catch (Exception e) { |
| System.out.println("TEST FAILED WITH EXCEPTION:"); |
| e.printStackTrace(System.out); |
| ok = false; |
| } |
| } |
| |
| if (ok) |
| System.out.println("Test passed"); |
| else { |
| System.out.println("TEST FAILED"); |
| System.exit(1); |
| } |
| } |
| |
| private static boolean test(String proto, MBeanServer mbs) |
| throws Exception { |
| System.out.println("Testing for proto " + proto); |
| |
| JMXConnectorServer cs; |
| JMXServiceURL url = new JMXServiceURL(proto, null, 0); |
| try { |
| cs = JMXConnectorServerFactory.newJMXConnectorServer(url, null, |
| mbs); |
| } catch (MalformedURLException e) { |
| System.out.println("System does not recognize URL: " + url + |
| "; ignoring"); |
| return true; |
| } |
| cs.start(); |
| JMXServiceURL addr = cs.getAddress(); |
| JMXServiceURL rmiurl = new JMXServiceURL("rmi", null, 0); |
| JMXConnector client = JMXConnectorFactory.connect(addr); |
| MBeanServerConnection mbsc = client.getMBeanServerConnection(); |
| ObjectName on = new ObjectName("x:proto=" + proto + ",ok=yes"); |
| mbsc.createMBean(RMIConnectorServer.class.getName(), |
| on, |
| mletName, |
| new Object[] {rmiurl, null}, |
| new String[] {JMXServiceURL.class.getName(), |
| Map.class.getName()}); |
| System.out.println("Successfully deserialized with " + proto); |
| mbsc.unregisterMBean(on); |
| |
| client.close(); |
| cs.stop(); |
| return true; |
| } |
| } |