package com.emis.framework;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.struts.action.Action;

import com.emis.util.Constants;

public abstract class ExtendedAction extends Action {
	Log log=LogFactory.getLog(this.getClass());
	
	/**
	 * 得到一個具體的業務代理實例
	 * @param factoryKey   具體某個工廠,可擴展
	 * @param serviceKey   某個業務的key
	 * @return
	 */
	protected IEmisActionProxy getService(String factoryKey,String serviceKey) {
		//可以指定工廠類
		IEmisFactory faction=(IEmisFactory)getApplicationObject(factoryKey);

		IEmisActionProxy service=null;
		try{
			service=faction.createService(serviceKey);
		}catch(Exception ex){ 
		    System.out.println("加載服務出現錯誤！！");
		    return null;
		}
		return service;     
	}
	
	/**
	 * 默認加載EmisActionProxyFactory工廠
	 * @param serviceKey
	 * @return
	 */
	protected IEmisActionProxy getService(String serviceKey) {
		return (this.getService(Constants.EMIS_FACTORY_KEY,serviceKey));
	}
	
	/**
	 * 
	 * @param serviceFactoryKey
	 * @return
	 *這個方法通過key取出容器中的對象
	 */
	protected Object getApplicationObject(String key){
		return servlet.getServletContext().getAttribute(key);
	}
}