public class StringBufferFactory
		extends BasePooledObjectFactory<StringBuffer> {
	private final static org.apache.log4j.Logger CLASS_LOGGER =org.apache.log4j.Logger.getLogger(StringBufferFactory.class);

	@Override
	public StringBuffer create() {
		return new StringBuffer();
	}

	/**
	 * Use the default PooledObject implementation.
	 */
	@Override
	public PooledObject<StringBuffer> wrap(StringBuffer buffer) {
		JMXPooledObject<StringBuffer> obj=new JMXPooledObject<StringBuffer>(buffer);
		return obj;
	}

	/**
	 * When an object is returned to the pool, clear the buffer.
	 */
	@Override
	public void passivateObject(PooledObject<StringBuffer> pooledObject) {
		pooledObject.getObject().setLength(0);
	}

	// for all other methods, the no-op implementation
	// in BasePooledObjectFactory will suffice
}

public class JMXPooledObject<T> extends org.apache.commons.pool2.impl.DefaultPooledObject implements JMXPooledObjectMBean
{
	private final static org.apache.log4j.Logger CLASS_LOGGER =org.apache.log4j.Logger.getLogger(JMXPooledObject.class);
	private java.lang.Throwable throwable;

	public JMXPooledObject(T client)
	{
		super(client);
		javax.management.MBeanServer mbeanServer=java.lang.management.ManagementFactory.getPlatformMBeanServer();//createMBeanServer();
		javax.management.ObjectName objectName=null;
		try
		{
			java.lang.String fqcn=client.getClass().getSimpleName();
			java.lang.String packageName=client.getClass().getPackageName();
			java.lang.String objn=this.getClass().getName()+"."+packageName+":type="+fqcn+",name="+(java.util.UUID.randomUUID().toString().replace(':','_').replace(' ','_'));
			CLASS_LOGGER.trace(objn);
			objectName=new javax.management.ObjectName(objn);
		}
		catch(javax.management.MalformedObjectNameException exp)
		{
			CLASS_LOGGER.error("Error creating object name for use in JMX environment!",exp);
		}
		try
		{
			mbeanServer.registerMBean(this,objectName);
		}
		catch(javax.management.JMException exp)
		{
			CLASS_LOGGER.error("Error registering connection into JMX environment!",exp);
		}
	}
	public boolean allocate()
	{
		throwable=new java.lang.Throwable();
		return super.allocate();
	}

	@Override
	public java.lang.StackTraceElement[] getStackframe()
	{
		return throwable!=null?throwable.getStackTrace():null;
	}
}