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/*
* Copyright (c) 2003, 2018, 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.
*/
package nsk.monitoring.share;
import java.lang.management.*;
import javax.management.*;
import nsk.share.*;
/**
* <code>RuntimeMonitor</code> class is a wrapper of <code>RuntimeMXBean</code>.
* Depending on command line arguments, an instance of this class redirects
* invocations to the <code>RuntimeMXBean</code> interface. If
* <code>-testMode="directly"</code> option is set, this instance directly
* invokes corresponding method of the <code>RuntimeMXBean</code> interface. If
* <code>-testMode="server"</code> option is set it will make invocations via
* MBeanServer. If <code>-testMode="proxy"</code> option is set it will make
* invocations via MBeanServer proxy.
*
* @see ArgumentHandler
*/
public class RuntimeMonitor extends Monitor {
// An instance of ClassLoadingMBean
private final static RuntimeMXBean mbean
= ManagementFactory.getRuntimeMXBean();
// Name of an attribute of RuntimeMonitor
private static final String IS_BOOT = "BootClassPathSupported";
private RuntimeMXBean proxyInstance;
static {
Monitor.logPrefix = "RuntimeMonitor> ";
}
/**
* Creates a new <code>RuntimeMonitor</code> object.
*
* @param log <code>Log</code> object to print info to.
* @param argumentHandler <code>ArgumentHandler</code> object that saves
* all info about test's arguments.
*
*/
public RuntimeMonitor(Log log, ArgumentHandler argumentHandler) {
super(log, argumentHandler);
}
/**
*
* Return a proxy instance for a platform
* {@link java.lang.management.RuntimeMXBean
* <code>RuntimeMXBean</code>} interface.
*
*/
RuntimeMXBean getProxy() {
if (proxyInstance == null) {
// create proxy instance
try {
proxyInstance = (RuntimeMXBean)
ManagementFactory.newPlatformMXBeanProxy(
getMBeanServer(),
ManagementFactory.RUNTIME_MXBEAN_NAME,
RuntimeMXBean.class
);
} catch (java.io.IOException e) {
throw new Failure(e);
}
}
return proxyInstance;
}
/**
* Redirects the invocation to
* {@link java.lang.management.RuntimeMXBean#isBootClassPathSupported()
* <code>RuntimeMXBean.isBootClassPathSupported()</code>}.
*
* @return <code>true</code>, if the JVM supports the class path mechanism;
* <code>flase</code> otherwise.
*/
public boolean isBootClassPathSupported() {
int mode = getTestMode();
switch (mode) {
case DIRECTLY_MODE:
return mbean.isBootClassPathSupported();
case SERVER_MODE:
return getBooleanAttribute(mbeanObjectName, IS_BOOT);
case PROXY_MODE:
return getProxy().isBootClassPathSupported();
}
throw new TestBug("Unknown testMode " + mode);
}
} // RuntimeMonitor
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