1 /* 2 * Copyright (c) 2004, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 /* 25 * @test 26 * @bug 5058327 27 * @summary Test if getThreadInfo(long[]) returns a ThreadInfo[] 28 * with null elements with no exception. 29 * 30 * @author Mandy Chung 31 * 32 * @build ThreadInfoArray 33 * @run main ThreadInfoArray 34 */ 35 36 import java.lang.management.*; 37 import javax.management.*; 38 import java.util.*; 39 import static java.lang.management.ManagementFactory.*; 40 41 public class ThreadInfoArray { 42 public static void main(String[] argv) throws Exception { 43 ThreadMXBean mbean = ManagementFactory.getThreadMXBean(); 44 45 // ID for a new thread 46 long [] ids = {new Thread().getId()}; 47 ThreadInfo[] tinfos = mbean.getThreadInfo(ids); 48 49 if (tinfos[0] != null) { 50 throw new RuntimeException("TEST FAILED: " + 51 "Expected to have a null element"); 52 } 53 54 // call getThreadInfo through MBeanServer 55 MBeanServer mbs = ManagementFactory.getPlatformMBeanServer(); 56 ObjectName on = new ObjectName(THREAD_MXBEAN_NAME); 57 Object[] params = {ids}; 58 String[] sigs = {"[J"}; 59 Object[] result = (Object[]) mbs.invoke(on, "getThreadInfo", params, sigs); 60 61 if (result[0] != null) { 62 throw new RuntimeException("TEST FAILED: " + 63 "Expected to have a null element via MBeanServer"); 64 } 65 66 // call getThreadInfo through proxy 67 ThreadMXBean proxy = newPlatformMXBeanProxy(mbs, 68 on.toString(), 69 ThreadMXBean.class); 70 tinfos = proxy.getThreadInfo(ids); 71 if (tinfos[0] != null) { 72 throw new RuntimeException("TEST FAILED: " + 73 "Expected to have a null element"); 74 } 75 System.out.println("Test passed"); 76 } 77 }