RSL(Oracle Retail Service Layer) - How to?

Hi,

Currently in project needed to integrate RPM and External POS system. I look at RSL, it's completely compliance with all requirements.

But i have some troubles with understanding this technology. The Programmers Guide maked in "Java Hard programmers" style.

I created the EJB Project, in NetBeans 7.3(There are 3 components of project - EJB, Client and EAR)

EJB Bean code:

package com.retek.rpm.service;

import javax.ejb.Stateless;
import com.oracle.retail.integration.base.bo.prcinqreq.v1.PrcInqReq;
import com.oracle.retail.integration.base.bo.prcinqdesc.v1.PrcInqDesc;
import com.oracle.retail.integration.base.bo.prcinqdesc.v1.PrcInqDtl;
import com.retek.rsl.rpm.PriceInquiryService;