package org.jboss.book.jmx.ex3;import java.rmi.RemoteException;import javax.ejb.SessionBean;import javax.ejb.SessionContext;import javax.ejb.FinderException;import javax.ejb.EJBException;import javax.naming.Context;import javax.naming.InitialContext;import javax.naming.NamingException;import javax.naming.directory.DirContext;import org.apache.log4j.Category;public class EchoBean implements SessionBean{   private static final Category log = Category.getInstance(EchoBean.class);   private SessionContext sessionCtx;   public void ejbCreate()   {      log.debug("ejbCreate: ");   }   public void ejbLoad()   {      log.debug("ejbLoad");   }   public void ejbRemove()   {      log.debug("ejbRemove");   }   public void ejbStore()   {      log.debug("ejbStore");   }   public void setSessionContext(SessionContext context)   {      sessionCtx = context;      log.debug("setSessionContext");   }   public void unsetSessionContext()   {      sessionCtx = null;      log.debug("unsetSessionContext");   }   public void ejbActivate()   {      log.debug("ejbActivate");   }   public void ejbPassivate()   {      log.debug("ejbPassivate");   }   public String echo(String arg)   {      String info = "echo, arg=";      try      {         InitialContext ctx = new InitialContext();         EchoInfoLocalHome home = (EchoInfoLocalHome) ctx.lookup("java:comp/env/ejb/EchoInfoLocalHome");         EchoInfoLocal bean = null;         try         {            bean = home.findByPrimaryKey("echo");         }         catch(FinderException e)         {            bean = home.create("echo");         }         info = bean.getInfo();      }      catch(Exception e)      {         throw new EJBException("Failed to access EchoInfo", e);      }      log.info("echo, info="+info+", arg="+arg);      return arg;   }}