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/*
* Copyright 2005 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
* CA 95054 USA or visit www.sun.com if you need additional information or
* have any questions.
*/
/*
* @test
* @bug 6305746
* @summary Test that the null values returned by the ThreadMXBean work.
* @author Eamonn McManus
* @run clean ThreadMXBeanTest
* @run build ThreadMXBeanTest
* @run main ThreadMXBeanTest
*/
import java.lang.management.*;
import java.util.*;
import javax.management.*;
public class ThreadMXBeanTest {
public static void main(String[] args) throws Exception {
MBeanServer mbs = MBeanServerFactory.newMBeanServer();
ThreadMXBean tmb = ManagementFactory.getThreadMXBean();
StandardMBean smb = new StandardMBean(tmb, ThreadMXBean.class, true);
ObjectName on = new ObjectName("a:type=ThreadMXBean");
mbs.registerMBean(smb, on);
ThreadMXBean proxy = JMX.newMXBeanProxy(mbs, on, ThreadMXBean.class);
long[] ids1 = proxy.getAllThreadIds();
// Add some random ids to the list so we'll get back null ThreadInfo
long[] ids2 = new long[ids1.length + 10];
System.arraycopy(ids1, 0, ids2, 0, ids1.length);
Random r = new Random();
for (int i = ids1.length; i < ids2.length; i++)
ids2[i] = Math.abs(r.nextLong());
// Following line produces an exception if null values not handled
ThreadInfo[] info = proxy.getThreadInfo(ids2);
boolean sawNull = false;
for (ThreadInfo ti : info) {
if (ti == null)
sawNull = true;
}
if (!sawNull)
throw new Exception("No null value in returned array");
System.out.println("TEST PASSED");
}
}
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