crmservicefactory.java

本文首先介绍了这些考试系统的形成和发展过程

package net.robin.crm.service;

import java.io.IOException;
import java.util.Properties;

public abstract class CRMServiceFactory {
	
	private static CRMServiceFactory instance;

	protected static Properties config;
	
	private static final String DEFAULT_CONFIG = "/crm.config.properties";
	
	public CRMServiceFactory() {
		super();
		// TODO 自动生成构造函数存根
	}
	
	
	public static CRMServiceFactory getInstance() throws ConfigException, InstanceExeption {
		
		
		if(config==null){
			
			config = new Properties();
			
			try {
				config.load(CRMServiceFactory.class.getResourceAsStream(DEFAULT_CONFIG));
			} catch (Exception e) {
				e.printStackTrace();
				throw new ConfigException(e);
			}
			
		}
		
		
		if(instance==null){
			//init instance
			
			instance = new CRMServiceFactoryXMLImpl();
			
		}
		
		return instance;
	}



	public abstract CRMService getCRMService()  throws ServiceException ;

}