package org.jboss.book.jmx.ex3;import javax.ejb.EntityBean;import javax.ejb.CreateException;import javax.ejb.EntityContext;/** * @author Scott.Stark@jboss.org * @version $Revision: 1.1 $ */public abstract class EchoInfoBean implements EntityBean{   public void setEntityContext(EntityContext ctx) { }   public void unsetEntityContext() { }   public void ejbActivate() { }   public void ejbPassivate() { }   public void ejbLoad() { }   public void ejbStore() { }   public void ejbRemove() { }   public String ejbCreate(String key) throws CreateException   {      setKey(key);      setInfo("echo info, arg=");      return null;   }   public void ejbPostCreate(String id)   {   }   public abstract String getKey();   public abstract void setKey(String key);   public abstract String getInfo();   public abstract void setInfo(String info);}