/*
* Copyright (c) 2014, 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. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* 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
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package sun.management;
import java.lang.reflect.InvocationTargetException;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import java.lang.management.PlatformManagedObject;
import java.lang.reflect.Method;
Class to allow for an extended set of platform MXBeans
/**
* Class to allow for an extended set of platform MXBeans
*/
public final class ExtendedPlatformComponent {
private ExtendedPlatformComponent() {} // Don't create any instances
Get the extended set of platform MXBeans that should be registered in the
platform MBeanServer, or an empty list if there are no such MXBeans.
/**
* Get the extended set of platform MXBeans that should be registered in the
* platform MBeanServer, or an empty list if there are no such MXBeans.
*/
public static List<? extends PlatformManagedObject> getMXBeans() {
PlatformManagedObject o = getFlightRecorderBean();
if (o != null) {
return Collections.singletonList(o);
} else {
return Collections.emptyList();
}
}
Returns the extended platform MXBean implementing the given
mxbeanInterface, or null if there is no such MXBean.
/**
* Returns the extended platform MXBean implementing the given
* mxbeanInterface, or null if there is no such MXBean.
*/
public static <T extends PlatformManagedObject>
T getMXBean(Class<T> mxbeanInterface) {
if ("jdk.management.jfr.FlightRecorderMXBean".equals(mxbeanInterface.getName())) {
return (T)getFlightRecorderBean();
}
return null;
}
private static PlatformManagedObject getFlightRecorderBean() {
PlatformManagedObject object = null;
try {
Class provider = Class.forName("jdk.management.jfr.internal.FlightRecorderMXBeanProvider");
Method m = provider.getDeclaredMethod("getFlightRecorderMXBean");
object = (PlatformManagedObject)m.invoke(null);
} catch (ClassNotFoundException | NoSuchMethodException | IllegalAccessException | InvocationTargetException e) {
// no jfr?
}
return object;
}
}