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/*
* Copyright (c) 2011, 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 7068328
* @summary Test if getObjectName handles properly when called by
* multiple threads simultaneously. Run in othervm mode to
* make sure the object name is not initialized to begin with.
*
* @run main/othervm GetObjectName
*/
import java.lang.management.BufferPoolMXBean;
import java.lang.management.ManagementFactory;
import java.lang.management.PlatformLoggingMXBean;
import java.lang.management.PlatformManagedObject;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.TimeUnit;
public class GetObjectName {
private static boolean failed = false;
public static void main(String[] args) throws Exception {
int tasks = 10000;
ExecutorService executor = Executors.newFixedThreadPool(10);
submitTasks(executor, tasks);
executor.shutdown();
executor.awaitTermination(10, TimeUnit.SECONDS);
if (!failed) {
System.out.println("Test passed.");
}
}
static void submitTasks(ExecutorService executor, int count) {
for (int i=0; i < count && !failed; i++) {
executor.execute(new Runnable() {
@Override
public void run() {
List<PlatformManagedObject> mbeans = new ArrayList<>();
mbeans.add(ManagementFactory.getPlatformMXBean(PlatformLoggingMXBean.class));
mbeans.addAll(ManagementFactory.getPlatformMXBeans(BufferPoolMXBean.class));
for (PlatformManagedObject pmo : mbeans) {
// Name should not be null
if (pmo.getObjectName() == null) {
failed = true;
throw new RuntimeException("TEST FAILED: getObjectName() returns null");
}
}
}
});
}
}
}
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