TransactionFilter

gistfile1.java

package org.onja.gov.elections;

import java.io.IOException;

import javax.annotation.Resource;
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.annotation.WebFilter;
import javax.transaction.*;

/**
 * Servlet Filter implementation class TransactionFilter
 */
@WebFilter(servletNames = { "TestServlet" })
public class TransactionFilter implements Filter {


  @Resource
	private UserTransaction userTransaction; 

	/**
	 * @see Filter#destroy()
	 */
	public void destroy() {
	}

	/**
	 * @see Filter#doFilter(ServletRequest, ServletResponse, FilterChain)
	 */
	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
		
		/***/
		try {
			
			this.userTransaction.begin();
			chain.doFilter(request, response);
			this.userTransaction.commit();
			
		} catch (NotSupportedException e) {

			e.printStackTrace();
		} catch (SystemException e) {

			e.printStackTrace();
		} catch (SecurityException e) {

			e.printStackTrace();
		} catch (IllegalStateException e) {

			e.printStackTrace();
		} catch (RollbackException e) {

			e.printStackTrace();
		} catch (HeuristicMixedException e) {

			e.printStackTrace();
		} catch (HeuristicRollbackException e) {

			e.printStackTrace();
		} 
	}

	/**
	 * @see Filter#init(FilterConfig)
	 */
	public void init(FilterConfig fConfig) throws ServletException {
	}

}