/* * Copyright (c) 2005, 2016, 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 * questions. */ /* * @test * @bug 6320211 * @summary Check that java.lang.management MXBeans have the same behavior * as user MXBeans * @author Eamonn McManus * * @modules jdk.management * * @run main/othervm MXBeanBehavior */ import java.lang.management.*; import java.lang.reflect.*; import java.util.*; import javax.management.*; public class MXBeanBehavior { // Exclude list: list of platform MBeans that are not MXBeans public static final HashSet excludeList = new HashSet<>( Arrays.asList("com.sun.management:type=DiagnosticCommand")); public static void main(String[] args) throws Exception { MBeanServer mbs = ManagementFactory.getPlatformMBeanServer(); /* Test that all the MBeans in the java.* and com.sun.management* domains are MXBeans with the appropriate behavior. */ Set names = mbs.queryNames(new ObjectName("java.*:*"), null); names.addAll(mbs.queryNames(new ObjectName("com.sun.management*:*"), null)); for (ObjectName name : names) test(mbs, name); /* Now do some rudimentary testing of inter-MXBean references. It should be possible for a user MXBean to return e.g. the CompilationMXBean from the platform from an attribute of type CompilationMXBean, and have the MXBean infrastructure map this into that MXBean's standard ObjectName. It should also be possible for a proxy for this user MXBean to have this attribute's value mapped back into a CompilationMXBean instance, which however will be another proxy rather than the original object. Finally, it should be possible to set the attribute in the user's MXBean through a proxy, giving the real CompilationMXBean as an argument, and have this be translated into that MXBean's standard ObjectName. The user's MXBean will receive a proxy in this case, though we don't check that. */ ObjectName refName = new ObjectName("d:type=CompilationRef"); mbs.registerMBean(new CompilationImpl(), refName); CompilationRefMXBean refProxy = JMX.newMXBeanProxy(mbs, refName, CompilationRefMXBean.class); refProxy.getCompilationMXBean(); refProxy.setCompilationMXBean(ManagementFactory.getCompilationMXBean()); ObjectName on = (ObjectName) mbs.getAttribute(refName, "CompilationMXBean"); checkEqual(on, new ObjectName(ManagementFactory.COMPILATION_MXBEAN_NAME), "Referenced object name"); mbs.setAttribute(refName, new Attribute("CompilationMXBean", on)); System.out.println("TEST PASSED"); } /* Check the behavior of this MXBean to ensure that it conforms to what is expected of all MXBeans as detailed in javax.management.MXBean. Its MBeanInfo should have a Descriptor with the fields mxbean and interfaceClassName, and furthermore we know that our implementation sets immutableInfo here. Each attribute should have Descriptor with the fields openType and originalType that have appropriate values. We don't currently check operations though the same considerations would apply there. (If the MBeanInfo and MBeanAttributeInfo tests pass we can reasonably suppose that this MXBean will behave the same as all other MXBeans, so MBeanOperationInfo, MBeanNotificationInfo, and MBeanConstructorInfo will be covered by generic MXBean tests. */ private static void test(MBeanServer mbs, ObjectName name) throws Exception { if(excludeList.contains(name.getCanonicalName())) { // Skipping not MXBean objects. return; } System.out.println("Testing: " + name); MBeanInfo mbi = mbs.getMBeanInfo(name); Descriptor mbid = mbi.getDescriptor(); Object[] values = mbid.getFieldValues("immutableInfo", "interfaceClassName", "mxbean"); checkEqual(values[0], "true", name + " immutableInfo field"); checkEqual(values[2], "true", name + " mxbean field"); String interfaceClassName = (String) values[1]; if (!mbs.isInstanceOf(name, interfaceClassName)) { throw new RuntimeException(name + " not instance of " + interfaceClassName); } Class interfaceClass = Class.forName(interfaceClassName); for (MBeanAttributeInfo mbai : mbi.getAttributes()) { Descriptor mbaid = mbai.getDescriptor(); Object[] avalues = mbaid.getFieldValues("openType", "originalType"); if (avalues[0] == null || avalues[1] == null) { throw new RuntimeException("Null attribute descriptor fields: " + Arrays.toString(avalues)); } if (mbai.isReadable()) { String mname = (mbai.isIs() ? "is" : "get") + mbai.getName(); Method m = interfaceClass.getMethod(mname); Type t = m.getGenericReturnType(); String ret = (t instanceof Class) ? ((Class) t).getName() : t.toString(); if (!ret.equals(avalues[1])) { final String msg = name + " attribute " + mbai.getName() + " has wrong " + "originalType: " + avalues[1] + " vs " + ret; throw new RuntimeException(msg); } } } } private static void checkEqual(Object x, Object y, String what) { final boolean eq; if (x == y) eq = true; else if (x == null) eq = false; else eq = x.equals(y); if (!eq) throw new RuntimeException(what + " should be " + y + ", is " + x); } public static interface CompilationRefMXBean { public CompilationMXBean getCompilationMXBean(); public void setCompilationMXBean(CompilationMXBean mxb); } public static class CompilationImpl implements CompilationRefMXBean { public CompilationMXBean getCompilationMXBean() { return ManagementFactory.getCompilationMXBean(); } public void setCompilationMXBean(CompilationMXBean mxb) { if (mxb == ManagementFactory.getCompilationMXBean()) return; MBeanServerInvocationHandler mbsih = (MBeanServerInvocationHandler) Proxy.getInvocationHandler(mxb); ObjectName expectedName; try { expectedName = new ObjectName(ManagementFactory.COMPILATION_MXBEAN_NAME); } catch (MalformedObjectNameException e) { throw new RuntimeException(e); } checkEqual(mbsih.getObjectName(), expectedName, "Proxy name in setCompilationMXBean"); } } }