/**
    * Logback: the reliable, generic, fast and flexible logging framework.
    * Copyright (C) 1999-2011, QOS.ch. All rights reserved.
    *
    * This program and the accompanying materials are dual-licensed under
    * either the terms of the Eclipse Public License v1.0 as published by
    * the Eclipse Foundation
    *
    *   or (per the licensee's choosing)
   *
   * under the terms of the GNU Lesser General Public License version 2.1
   * as published by the Free Software Foundation.
   */
  package ch.qos.logback.classic.joran.action;
  
  import java.lang.management.ManagementFactory;
  
  import javax.management.MBeanServer;
  import javax.management.ObjectName;
  
  import org.xml.sax.Attributes;
  
  import ch.qos.logback.classic.LoggerContext;
  import ch.qos.logback.classic.jmx.JMXConfigurator;
  import ch.qos.logback.classic.jmx.MBeanUtil;
  import ch.qos.logback.core.joran.action.Action;
  import ch.qos.logback.core.joran.spi.ActionException;
  import ch.qos.logback.core.joran.spi.InterpretationContext;
  import ch.qos.logback.core.util.OptionHelper;
  
  public class JMXConfiguratorAction extends Action {
  
    static final String OBJECT_NAME_ATTRIBUTE_NAME = "objectName";
    static final String CONTEXT_NAME_ATTRIBUTE_NAME = "contextName";
    static final char JMX_NAME_SEPARATOR = ',';
    
    @Override
    public void begin(InterpretationContext ec, String name, Attributes attributes)
        throws ActionException {
      addInfo("begin");
  
  
      String contextName = context.getName();
      String contextNameAttributeVal = attributes
      .getValue(CONTEXT_NAME_ATTRIBUTE_NAME);
      if(!OptionHelper.isEmpty(contextNameAttributeVal)) {
        contextName = contextNameAttributeVal;
      }
  
      String objectNameAsStr;
      String objectNameAttributeVal = attributes
          .getValue(OBJECT_NAME_ATTRIBUTE_NAME);
      if (OptionHelper.isEmpty(objectNameAttributeVal)) {
        objectNameAsStr = MBeanUtil.getObjectNameFor(contextName,
            JMXConfigurator.class);
      } else {
        objectNameAsStr = objectNameAttributeVal;
      }
  
      ObjectName objectName = MBeanUtil.string2ObjectName(context, this,
          objectNameAsStr);
      if (objectName == null) {
        addError("Failed construct ObjectName for ["+objectNameAsStr+"]");
        return;
      }
      
      MBeanServer mbs = ManagementFactory.getPlatformMBeanServer();
      if(!MBeanUtil.isRegistered(mbs, objectName)) {
        // register only of the named JMXConfigurator has not been previously
        // registered. Unregistering an MBean within invocation of itself
        // caused jconsole to throw an NPE. (This occurs when the reload* method
        // unregisters the 
        JMXConfigurator jmxConfigurator = new JMXConfigurator((LoggerContext) context, mbs,
            objectName);
        try {     
          mbs.registerMBean(jmxConfigurator, objectName);
        } catch (Exception e) {
          addError("Failed to create mbean", e);
        }
      }
  
    }
  
    @Override
    public void end(InterpretationContext ec, String name) throws ActionException {
  
    }
  
  }