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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>CompilationMonitor</code> class is a wrapper of
* <tt>CompilationMXBean</tt>. Depending on command line arguments, an instance
* of this class redirects invocations to the <tt>CompilationMXBean</tt>
* interface. If <code>-testMode="directly"</code> option is set, this instance
* directly invokes corresponding method of the <tt>CompilationMXBean</tt>
* 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 CompilationMonitor extends Monitor {
// An instance of CompilationMXBean
private static CompilationMXBean mbean
= ManagementFactory.getCompilationMXBean();
private CompilationMXBean proxyInstance;
// An attribute of CompilationMXBean
private static final String IS_COMP = "CompilationTimeMonitoringSupported";
static {
Monitor.logPrefix = "CompilationMonitor> ";
}
/**
* Creates a new <code>CompilationMonitor</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 CompilationMonitor(Log log, ArgumentHandler argumentHandler) {
super(log, argumentHandler);
}
/**
*
* Return a proxy instance for a platform
* {@link java.lang.management.CompilationMXBean
* <code>CompilationMXBean</code>} interface.
*
*/
synchronized CompilationMXBean getProxy() {
if (proxyInstance == null) {
// create proxy instance
try {
proxyInstance = (CompilationMXBean)
ManagementFactory.newPlatformMXBeanProxy(
getMBeanServer(),
ManagementFactory.COMPILATION_MXBEAN_NAME,
CompilationMXBean.class
);
} catch (java.io.IOException e) {
throw new Failure(e);
}
}
return proxyInstance;
}
/**
* Detects if the JVM has compilation system.
*
* @return <code>true</code>, if the JVM has compilation system,
* <code>false</code> otherwise.
*/
public boolean isCompilationSystem() {
int mode = getTestMode();
switch (mode) {
case DIRECTLY_MODE:
return (mbean != null);
case SERVER_MODE:
case PROXY_MODE:
try {
return getMBeanServer().isRegistered(mbeanObjectName);
} catch (RuntimeOperationsException e) {
complain("Unexpected exception");
e.printStackTrace(logger.getOutStream());
throw new Failure(e);
}
}
throw new TestBug("Unknown testMode " + mode);
} // isCompilationSystem()
/**
* Redirects the invocation to
* {@link CompilationMXBean#isCompilationTimeMonitoringSupported()
* <code>CompilationMXBean.isCompilationTimeMonitoringSupported()</code>}.
*
* @return <code>true</code>, if the monitoring of compilation time is
* supported, <code>false</code> otherwise.
*/
public boolean isCompilationTimeMonitoringSupported() {
int mode = getTestMode();
switch (mode) {
case DIRECTLY_MODE:
return mbean.isCompilationTimeMonitoringSupported();
case SERVER_MODE:
return getBooleanAttribute(mbeanObjectName, IS_COMP);
case PROXY_MODE:
return getProxy().isCompilationTimeMonitoringSupported();
}
throw new TestBug("Unknown testMode " + mode);
} // isCompilationTimeMonitoringSupported()
} // CompilationMonitor
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