bitronix.tm.utils.ManagementRegistrar Maven / Gradle / Ivy
/*
* Bitronix Transaction Manager
*
* Copyright (c) 2010, Bitronix Software.
*
* This copyrighted material is made available to anyone wishing to use, modify,
* copy, or redistribute it subject to the terms and conditions of the GNU
* Lesser General Public License, as published by the Free Software Foundation.
*
* This program 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 Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this distribution; if not, write to:
* Free Software Foundation, Inc.
* 51 Franklin Street, Fifth Floor
* Boston, MA 02110-1301 USA
*/
package bitronix.tm.utils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.lang.reflect.Method;
import java.lang.reflect.Constructor;
import bitronix.tm.internal.BitronixRuntimeException;
import bitronix.tm.TransactionManagerServices;
/**
* Simple JMX facade. In case there is no JMX implementation available, calling methods of this class have no effect.
*
* @author lorban
*/
public class ManagementRegistrar {
private final static Logger log = LoggerFactory.getLogger(ManagementRegistrar.class);
private static Object mbeanServer;
private static Method registerMBeanMethod;
private static Method unregisterMBeanMethod;
private static Constructor objectNameConstructor;
static {
boolean enableJmx = !TransactionManagerServices.getConfiguration().isDisableJmx();
if (enableJmx) {
try {
Class managementFactoryClass = ClassLoaderUtils.loadClass("java.lang.management.ManagementFactory");
Method getPlatformMBeanServerMethod = managementFactoryClass.getMethod("getPlatformMBeanServer", (Class[]) null);
mbeanServer = getPlatformMBeanServerMethod.invoke(managementFactoryClass, (Object[]) null);
Class objectNameClass = ClassLoaderUtils.loadClass("javax.management.ObjectName");
objectNameConstructor = objectNameClass.getConstructor(new Class[] {String.class});
registerMBeanMethod = mbeanServer.getClass().getMethod("registerMBean", new Class[] {Object.class, objectNameClass});
unregisterMBeanMethod = mbeanServer.getClass().getMethod("unregisterMBean", new Class[] {objectNameClass});
} catch (Exception ex) {
// no management in case an exception is thrown
mbeanServer = null;
}
} // if (enableJmx)
}
/**
* Replace characters considered illegal in a management object's name.
* @param name the name to work on.
* @return a fully valid name where all invalid characters have been replaced with '_'.
*/
public static String makeValidName(String name) {
return name.replaceAll("[\\:\\,\\=,\\.]", "_");
}
/**
* Register the specified management object.
* @param name the name of the object.
* @param obj the management object.
*/
public static void register(String name, Object obj) {
if (mbeanServer == null)
return;
try {
Object objName = buildObjectName(name);
mbeanServerCall(registerMBeanMethod, new Object[] {obj, objName});
} catch (Exception ex) {
log.warn("cannot register object with name " + name, ex);
}
}
/**
* Unregister the management object with the specified name.
* @param name the name of the object.
*/
public static void unregister(String name) {
if (mbeanServer == null)
return;
try {
Object objName = buildObjectName(name);
mbeanServerCall(unregisterMBeanMethod, new Object[] {objName});
} catch (Exception ex) {
log.warn("cannot unregister object with name " + name, ex);
}
}
/* internal impl */
private static Object buildObjectName(String name) {
try {
return objectNameConstructor.newInstance(new Object[] {name});
} catch (Exception ex) {
throw new BitronixRuntimeException("cannot build ObjectName with name=" + name, ex);
}
}
private static void mbeanServerCall(Method method, Object[] params) {
try {
method.invoke(mbeanServer, params);
} catch (Exception ex) {
throw new BitronixRuntimeException("cannot call method '" + method.getName() + "'", ex);
}
}
}
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