68 lines
2.6 KiB
Java
68 lines
2.6 KiB
Java
/*
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* Copyright (c) 2005, 2015, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @bug 6305746
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* @key randomness
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* @summary Test that the null values returned by the ThreadMXBean work.
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* @author Eamonn McManus
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*
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* @run clean ThreadMXBeanTest
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* @run build ThreadMXBeanTest
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* @run main ThreadMXBeanTest
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*/
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import java.lang.management.*;
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import java.util.*;
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import javax.management.*;
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public class ThreadMXBeanTest {
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public static void main(String[] args) throws Exception {
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MBeanServer mbs = MBeanServerFactory.newMBeanServer();
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ThreadMXBean tmb = ManagementFactory.getThreadMXBean();
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StandardMBean smb = new StandardMBean(tmb, ThreadMXBean.class, true);
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ObjectName on = new ObjectName("a:type=ThreadMXBean");
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mbs.registerMBean(smb, on);
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ThreadMXBean proxy = JMX.newMXBeanProxy(mbs, on, ThreadMXBean.class);
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long[] ids1 = proxy.getAllThreadIds();
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// Add some random ids to the list so we'll get back null ThreadInfo
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long[] ids2 = new long[ids1.length + 10];
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System.arraycopy(ids1, 0, ids2, 0, ids1.length);
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Random r = new Random();
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for (int i = ids1.length; i < ids2.length; i++)
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ids2[i] = Math.abs(r.nextLong());
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// Following line produces an exception if null values not handled
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ThreadInfo[] info = proxy.getThreadInfo(ids2);
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boolean sawNull = false;
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for (ThreadInfo ti : info) {
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if (ti == null)
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sawNull = true;
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}
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if (!sawNull)
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throw new Exception("No null value in returned array");
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System.out.println("TEST PASSED");
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}
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}
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