| /* |
| * Copyright (c) 2008, 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 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(); |
| 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); |
| assertEquals(mbeanCount * 2, mbs.getAttribute(countName, "Count")); |
| } |
| |
| 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); |
| } |
| } |
| } |