| /* |
| * 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 |
| * questions. |
| */ |
| |
| /* |
| * @test |
| * @bug 4909536 |
| * @summary Ensure that the Introspector does not retain refs to classes |
| * @author Eamonn McManus |
| * |
| * @run clean ClassLeakTest |
| * @run build ClassLeakTest |
| * @run main ClassLeakTest |
| */ |
| |
| import java.lang.ref.WeakReference; |
| import java.io.File; |
| import java.nio.file.Paths; |
| import java.net.*; |
| import java.util.*; |
| |
| import javax.management.*; |
| import javax.management.loading.*; |
| |
| public class ClassLeakTest { |
| public static void main(String[] args) throws Exception { |
| System.out.println("Testing that registering and unregistering a " + |
| "Standard MBean does not retain a reference to " + |
| "the MBean's class"); |
| |
| |
| String[] cpaths = System.getProperty("test.classes", ".") |
| .split(File.pathSeparator); |
| URL[] urls = new URL[cpaths.length]; |
| for (int i=0; i < cpaths.length; i++) { |
| urls[i] = Paths.get(cpaths[i]).toUri().toURL(); |
| } |
| |
| PrivateMLet mlet = new PrivateMLet(urls, null, false); |
| Class<?> shadowClass = mlet.loadClass(TestMBean.class.getName()); |
| if (shadowClass == TestMBean.class) { |
| System.out.println("TEST INVALID: MLet got original " + |
| "TestMBean not shadow"); |
| System.exit(1); |
| } |
| shadowClass = null; |
| |
| MBeanServer mbs = MBeanServerFactory.createMBeanServer(); |
| ObjectName mletName = new ObjectName("x:type=mlet"); |
| mbs.registerMBean(mlet, mletName); |
| |
| ObjectName testName = new ObjectName("x:type=test"); |
| mbs.createMBean(Test.class.getName(), testName, mletName); |
| |
| ClassLoader testLoader = mbs.getClassLoaderFor(testName); |
| if (testLoader != mlet) { |
| System.out.println("TEST INVALID: MBean's class loader is not " + |
| "MLet: " + testLoader); |
| System.exit(1); |
| } |
| testLoader = null; |
| |
| MBeanInfo info = mbs.getMBeanInfo(testName); |
| MBeanAttributeInfo[] attrs = info.getAttributes(); |
| if (attrs.length != 1 || !attrs[0].getName().equals("A") |
| || !attrs[0].isReadable() || !attrs[0].isWritable() |
| || attrs[0].isIs() || !attrs[0].getType().equals("int")) { |
| System.out.println("TEST FAILED: unexpected MBeanInfo attrs"); |
| System.exit(1); |
| } |
| MBeanOperationInfo[] ops = info.getOperations(); |
| if (ops.length != 1 || !ops[0].getName().equals("bogus") |
| || ops[0].getSignature().length > 0 |
| || ops[0].getImpact() != MBeanOperationInfo.UNKNOWN |
| || !ops[0].getReturnType().equals("void")) { |
| System.out.println("TEST FAILED: unexpected MBeanInfo ops"); |
| System.exit(1); |
| } |
| if (info.getConstructors().length != 2) { |
| System.out.println("TEST FAILED: wrong number of constructors " + |
| "in introspected bean: " + |
| Arrays.asList(info.getConstructors())); |
| System.exit(1); |
| } |
| if (!info.getClassName().endsWith("Test")) { |
| System.out.println("TEST FAILED: wrong info class name: " + |
| info.getClassName()); |
| System.exit(1); |
| } |
| |
| mbs.unregisterMBean(testName); |
| mbs.unregisterMBean(mletName); |
| |
| WeakReference mletRef = new WeakReference(mlet); |
| mlet = null; |
| |
| System.out.println("MBean registered and unregistered, waiting for " + |
| "garbage collector to collect class loader"); |
| for (int i = 0; i < 10000 && mletRef.get() != null; i++) { |
| System.gc(); |
| Thread.sleep(1); |
| } |
| |
| if (mletRef.get() == null) |
| System.out.println("Test passed: class loader was GC'd"); |
| else { |
| System.out.println("TEST FAILED: class loader was not GC'd"); |
| System.exit(1); |
| } |
| } |
| |
| public static interface TestMBean { |
| public void bogus(); |
| public int getA(); |
| public void setA(int a); |
| } |
| |
| public static class Test implements TestMBean { |
| public Test() {} |
| public Test(int x) {} |
| |
| public void bogus() {} |
| public int getA() {return 0;} |
| public void setA(int a) {} |
| } |
| } |