connfilter.java

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/*
 * Created on 2005-10-6
 * Last modified on 2007-7-9
 * Powered by YeQiangWei.com
 */
package com.yeqiangwei.club.filter;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
//import javax.servlet.http.HttpServletRequest;
//import javax.servlet.http.HttpServletResponse;

import org.apache.log4j.Logger;
import org.hibernate.HibernateException;

import com.yeqiangwei.club.dao.hibernate.ConnectionProvider;

public class ConnFilter implements Filter {
	
	private static final Logger logger = Logger.getLogger(ConnFilter.class.getName());
	
    protected FilterConfig filterConfig = null;

    public void init(FilterConfig filterConfig) throws ServletException {
        this.filterConfig = filterConfig;
        ConnectionProvider.init();
    } 
    
    public void doFilter(ServletRequest req
            , ServletResponse res
            , FilterChain chain) throws IOException, ServletException 
    {
        try{
        	ConnectionProvider.beginTransaction();
            chain.doFilter(req,res);
        }
        finally{
            try {
            	ConnectionProvider.commitTransaction();
            }catch (HibernateException e) {
                logger.error("commit transaction error "+e.toString());
                try {   
                	ConnectionProvider.rollbackTransaction();
                }catch (HibernateException e2) {
                	logger.error("rollback error "+e2.toString());
                }
            }finally{
            	try {   
            		ConnectionProvider.closeSession();
            	}catch (HibernateException e3) {
            		logger.error("close session error "+e3.toString());
            	}
            }
        }
    }
    
    public void destroy() {
       this.filterConfig = null;
    }
}