servicelocator.java

< J2EE应用开发详解>>一书全部的源代码. 本书基于J2EE 1．4平台

package com.j2ee14.ch18;

import javax.naming.InitialContext;
import javax.naming.NamingException;
import javax.ejb.EJBLocalHome;
/**
 *用于服务定位的工具类
 */
public class ServiceLocator
{
	
	private InitialContext ic;
	   
	   public ServiceLocator() throws ServiceLocatorException
	   {
	   	  try {
	        ic = new InitialContext();
	      } catch (NamingException ne) {
	            throw new ServiceLocatorException(ne);
	      } catch (Exception e) {
	            throw new ServiceLocatorException(e);
	      }
	    }
	/**
	 *获得EJB的本地接口
	 */
	public EJBLocalHome getLocalHome(String name) throws ServiceLocatorException
     {
    
      EJBLocalHome home = null;
      try { 
          home = (EJBLocalHome) ic.lookup(name);
       } catch (NamingException ne) {
            throw new ServiceLocatorException(ne);
       } catch (Exception e) {
            throw new ServiceLocatorException(e);
       }
       return home;
    }
}