org.xwiki.management.internal.DefaultJMXBeanRegistration.java Source code

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Here is the source code for org.xwiki.management.internal.DefaultJMXBeanRegistration.java

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/*
 * See the NOTICE file distributed with this work for additional
 * information regarding copyright ownership.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software 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 software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */
package org.xwiki.management.internal;

import java.lang.management.ManagementFactory;

import javax.inject.Inject;
import javax.inject.Singleton;
import javax.management.MBeanServer;
import javax.management.ObjectName;

import org.apache.commons.lang3.exception.ExceptionUtils;
import org.slf4j.Logger;
import org.xwiki.component.annotation.Component;
import org.xwiki.management.JMXBeanRegistration;

/**
 * Registers MBeans against the default platform MBean Server using a default ObjectName domain of "org.xwiki".
 *
 * @version $Id: 3cfc1d9f412c959dbe950d6f430cc9c249957339 $
 * @since 2.4M2
 */
@Component
@Singleton
public class DefaultJMXBeanRegistration implements JMXBeanRegistration {
    private static final String OBJECTNAME_PREFIX = "org.xwiki:";

    /**
     * The logger to use for logging.
     */
    @Inject
    private Logger logger;

    @Override
    public void registerMBean(Object mbean, String name) {
        // Make sure we never fail since XWiki should execute correctly even if there's no MBean Server running.
        try {
            MBeanServer mbs = ManagementFactory.getPlatformMBeanServer();
            ObjectName oname = new ObjectName(OBJECTNAME_PREFIX + name);
            mbs.registerMBean(mbean, oname);
            this.logger.debug("Registered resource with name [{}]", name);
        } catch (Exception e) {
            // Failed to register the MBean, log a warning
            this.logger.warn("Failed to register resource with name [{}]. Reason = [{}]", name,
                    ExceptionUtils.getMessage(e));
        }
    }

    @Override
    public void unregisterMBean(String name) {
        // Make sure we never fail since XWiki should execute correctly even if it fail to unregister some MBean
        try {
            MBeanServer mbs = ManagementFactory.getPlatformMBeanServer();
            ObjectName oname = new ObjectName(OBJECTNAME_PREFIX + name);
            mbs.unregisterMBean(oname);
            this.logger.debug("Unregistered resource with name [{}]", name);
        } catch (Exception e) {
            // Failed to unregister the MBean, log a warning
            this.logger.warn("Failed to unregister resource with name [{}]. Reason = [{}]", name,
                    ExceptionUtils.getMessage(e));
        }
    }
}