132 lines
4.8 KiB
Java
132 lines
4.8 KiB
Java
/*
|
|
* Copyright (c) 2008, 2020, 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 6692027
|
|
* @summary Check that custom subclasses of QueryEval can be serialized.
|
|
* @author Eamonn McManus
|
|
*/
|
|
|
|
import java.io.ByteArrayInputStream;
|
|
import java.io.ByteArrayOutputStream;
|
|
import java.io.ObjectInputStream;
|
|
import java.io.ObjectOutputStream;
|
|
import java.lang.management.ManagementFactory;
|
|
import java.util.Set;
|
|
import java.util.concurrent.atomic.AtomicInteger;
|
|
import javax.management.MBeanServer;
|
|
import javax.management.MalformedObjectNameException;
|
|
import javax.management.ObjectName;
|
|
import javax.management.QueryEval;
|
|
import javax.management.QueryExp;
|
|
|
|
public class CustomQueryTest {
|
|
public static interface CountMBean {
|
|
public int getCount();
|
|
public void increment();
|
|
}
|
|
|
|
public static class Count implements CountMBean {
|
|
private AtomicInteger count = new AtomicInteger();
|
|
|
|
public int getCount() {
|
|
return count.get();
|
|
}
|
|
|
|
public void increment() {
|
|
count.incrementAndGet();
|
|
}
|
|
|
|
}
|
|
|
|
public static final ObjectName countName;
|
|
static {
|
|
try {
|
|
countName = new ObjectName("d:type=Count");
|
|
} catch (MalformedObjectNameException e) {
|
|
throw new AssertionError(e);
|
|
}
|
|
}
|
|
|
|
/* A query that calls the increment method of the Count MBean every time
|
|
* it is evaluated. If there is no ObjectName filter, the query will be
|
|
* evaluated for every MBean in the MBean Server, so the count will be
|
|
* incremented by the number of MBeans.
|
|
*/
|
|
public static class IncrQuery extends QueryEval implements QueryExp {
|
|
public boolean apply(ObjectName name) {
|
|
try {
|
|
getMBeanServer().invoke(countName, "increment", null, null);
|
|
return true;
|
|
} catch (Throwable t) {
|
|
t.printStackTrace();
|
|
System.exit(1);
|
|
throw new AssertionError(); // not reached
|
|
}
|
|
}
|
|
}
|
|
|
|
public static void main(String[] args) throws Exception {
|
|
MBeanServer mbs = ManagementFactory.getPlatformMBeanServer();
|
|
boolean isSecondAttempt = false;
|
|
// The test may fail if some new MBean is registered while the test
|
|
// is running (e.g. Graal MBean). In this case just retry the test.
|
|
while (true) {
|
|
mbs.registerMBean(new Count(), countName);
|
|
int mbeanCount = mbs.getMBeanCount();
|
|
QueryExp query = new IncrQuery();
|
|
Set<ObjectName> names = mbs.queryNames(null, query);
|
|
assertEquals(mbeanCount, names.size());
|
|
assertEquals(mbeanCount, mbs.getAttribute(countName, "Count"));
|
|
ByteArrayOutputStream bout = new ByteArrayOutputStream();
|
|
ObjectOutputStream oout = new ObjectOutputStream(bout);
|
|
oout.writeObject(query);
|
|
oout.close();
|
|
ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
|
|
ObjectInputStream oin = new ObjectInputStream(bin);
|
|
query = (QueryExp) oin.readObject();
|
|
names = mbs.queryNames(null, query);
|
|
int counterCount = (int)mbs.getAttribute(countName, "Count");
|
|
if (mbeanCount * 2 == counterCount) {
|
|
break;
|
|
}
|
|
if (isSecondAttempt) {
|
|
assertEquals(mbeanCount * 2, counterCount);
|
|
break;
|
|
}
|
|
isSecondAttempt = true;
|
|
System.out.println("New MBean was registered. Retrying...");
|
|
mbs.unregisterMBean(countName);
|
|
}
|
|
}
|
|
|
|
private static void assertEquals(Object expected, Object actual)
|
|
throws Exception {
|
|
if (!expected.equals(actual)) {
|
|
String failure = "FAILED: expected " + expected + ", got " + actual;
|
|
throw new Exception(failure);
|
|
}
|
|
}
|
|
}
|