Registry.java 文件源码

/**
 * Factory method to create (if necessary) and return our
 * <code>MBeanServer</code> instance.
 *
 */
public synchronized MBeanServer getMBeanServer() {
    long t1 = System.currentTimeMillis();

    if (server == null) {
        if (MBeanServerFactory.findMBeanServer(null).size() > 0) {
            server = MBeanServerFactory.findMBeanServer(null).get(0);
            if (log.isDebugEnabled()) {
                log.debug("Using existing MBeanServer " + (System.currentTimeMillis() - t1));
            }
        } else {
            server = ManagementFactory.getPlatformMBeanServer();
            if (log.isDebugEnabled()) {
                log.debug("Creating MBeanServer" + (System.currentTimeMillis() - t1));
            }
        }
    }
    return (server);
}