| /* | |
| * 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 | |
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| * 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<String> 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<ObjectName> 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"); | |
| } | |
| } | |
| } |