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/*
* Copyright (c) 2004, 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
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/*
* @test
* @bug 5058327 8074368
* @summary Tests the correct behaviour of getThreadInfo(long[]) for non-existent
* thread IDs and the empty thread id array.
*
* @author Mandy Chung
* @author Jaroslav Bachorik
*
* @modules jdk.management
* @build ThreadInfoArray
* @run main ThreadInfoArray
*/
import java.lang.management.*;
import javax.management.*;
import static java.lang.management.ManagementFactory.*;
public class ThreadInfoArray {
public static void main(String[] argv) throws Exception {
MBeanServer mbs = ManagementFactory.getPlatformMBeanServer();
ObjectName on = new ObjectName(THREAD_MXBEAN_NAME);
ThreadMXBean mbean = ManagementFactory.getThreadMXBean();
ThreadMXBean proxy = newPlatformMXBeanProxy(mbs,
on.toString(),
ThreadMXBean.class);
checkNullElement(mbean, proxy, mbs, on);
checkEmptyArray(mbean, proxy, mbs, on);
System.out.println("Test passed");
}
private static void checkNullElement(ThreadMXBean mbean, ThreadMXBean proxy,
MBeanServer mbs, ObjectName on)
throws Exception {
System.out.println("--- Check null element");
// ID for a new thread
long [] ids = {new Thread().getId()};
// direct call
ThreadInfo[] tinfos = mbean.getThreadInfo(ids);
if (tinfos[0] != null) {
throw new RuntimeException("TEST FAILED: " +
"Expected to have a null element");
}
// call getThreadInfo through MBeanServer
Object[] params = {ids};
String[] sigs = {"[J"};
Object[] result = (Object[]) mbs.invoke(on, "getThreadInfo", params, sigs);
if (result[0] != null) {
throw new RuntimeException("TEST FAILED: " +
"Expected to have a null element via MBeanServer");
}
// call getThreadInfo through proxy
tinfos = proxy.getThreadInfo(ids);
if (tinfos[0] != null) {
throw new RuntimeException("TEST FAILED: " +
"Expected to have a null element");
}
System.out.println("--- PASSED");
}
private static void checkEmptyArray(ThreadMXBean mbean, ThreadMXBean proxy,
MBeanServer mbs, ObjectName on)
throws Exception {
System.out.println("--- Check empty TID array");
long[] ids = new long[0];
// direct call
assertEmptyArray(mbean.getThreadInfo(ids), "Expected empty ThreadInfo array");
assertEmptyArray(mbean.getThreadInfo(ids, 1), "Expected empty ThreadInfo array");
assertEmptyArray(mbean.getThreadInfo(ids, true, true), "Expected empty ThreadInfo array");
// call getThreadInfo through MBeanServer
assertEmptyArray(
(Object[]) mbs.invoke(
on, "getThreadInfo", new Object[]{ids}, new String[]{"[J"}
),
"Expected empty ThreadInfo array via MBeanServer"
);
assertEmptyArray(
(Object[]) mbs.invoke(
on, "getThreadInfo", new Object[]{ids, 1},
new String[]{"[J", "int"}
),
"Expected empty ThreadInfo array via MBeanServer"
);
assertEmptyArray(
(Object[]) mbs.invoke(
on, "getThreadInfo", new Object[]{ids, true, true},
new String[]{"[J", "boolean", "boolean"}
),
"Expected empty ThreadInfo array via MBeanServer"
);
// call getThreadInfo through proxy
assertEmptyArray(proxy.getThreadInfo(ids), "Expected empty ThreadInfo array");
assertEmptyArray(proxy.getThreadInfo(ids, 1), "Expected empty ThreadInfo array");
assertEmptyArray(proxy.getThreadInfo(ids, true, true), "Expected empty ThreadInfo array");
System.out.println("--- PASSED");
}
private static void assertEmptyArray(Object[] arr, String message) throws Exception {
if (arr.length > 0) {
throw new RuntimeException("TEST FAILED: " + message);
}
}
}
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