code: // Licensed to the Software Freedom Conservancy (SFC) under one
  // or more contributor license agreements.  See the NOTICE file
  // distributed with this work for additional information
  // regarding copyright ownership.  The SFC licenses this file
  // to you under the Apache License, Version 2.0 (the
  // "License"); you may not use this file except in compliance
  // with the License.  You may obtain a copy of the License at
  //
  //   http://www.apache.org/licenses/LICENSE-2.0
  //
  // Unless required by applicable law or agreed to in writing,
  // software distributed under the License is distributed on an
  // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
  // KIND, either express or implied.  See the License for the
  // specific language governing permissions and limitations
  // under the License.
  
  package org.openqa.selenium.grid.jmx;
  
  import java.lang.management.ManagementFactory;
  import javax.management.InstanceAlreadyExistsException;
  import javax.management.MBeanServer;
  import javax.management.ObjectName;
  
  public class JMXHelper {
  
    public MBean register(Object bean) {
      MBeanServer mbs = ManagementFactory.getPlatformMBeanServer();
      MBean mBean = new MBean(bean);
      try {
        mbs.registerMBean(mBean, mBean.getObjectName());
        return mBean;
      } catch (InstanceAlreadyExistsException t) {
        return mBean;
      } catch (Throwable t) {
        t.printStackTrace();
        return null;
      }
    }
  
    public void unregister(ObjectName objectName) {
      if (objectName != null) {
        MBeanServer mbs = ManagementFactory.getPlatformMBeanServer();
        try {
          mbs.unregisterMBean(objectName);
        } catch (Throwable ignore) {
        }
      }
    }
  }
  