dispatcherfilter.java

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/* 
 * Filter and RequestDispatcher test
 */

package com.sun.j2ee.workflow.control.filters;

import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.ServletException;
import javax.servlet.ServletContext;
import javax.servlet.ServletOutputStream;
import java.io.*;
import java.util.Date;
import java.awt.*;
import com.sun.image.codec.jpeg.JPEGImageEncoder;
import java.awt.image.BufferedImage;

import com.sun.j2ee.workflow.util.Debug;
/**
 *
 * @author Jian (James) Cai
 * @version 0.1 
 */
public class DispatcherFilter implements Filter
{
    private ServletContext ctx;
    private String dispatchertype;

    /** constructor
     */    
    public DispatcherFilter() {    
    }
    
    public void init (javax.servlet.FilterConfig filterConfig) 
         throws ServletException {
    ctx = filterConfig.getServletContext();
    dispatchertype = filterConfig.getInitParameter("type");
    ctx.log("Filter " + filterConfig.getFilterName() + 
                                                " initialized.");
    }

    public void doFilter(final ServletRequest request, final ServletResponse response, FilterChain chain) throws java.io.IOException,
    javax.servlet.ServletException
    {
	//GenericResponseWrapper wrapper = new GenericResponseWrapper((HttpServletResponse)response);
	chain.doFilter(request, response);
	//ServletOutputStream out = response.getOutputStream();
        PrintWriter out = response.getWriter();

        Debug.println("DispatcherFilter: filter the admin as type: "+ dispatchertype);
	
	//message = getFilterConfig().getInitParameter("message");

	//response.setContentType("text/html");
        out.println("<p><p>");
	out.println("<p>DispacherFilter Checking dispacher: <p>");
	out.println("<table BORDER COLS=2 WIDTH=\"100%\" NOSAVE >");
	out.println("<tr>");
	out.println("<td>Dispacher Value:</td>");
	out.println("<td>"+dispatchertype+"</td>");
	out.println("</tr>");
	out.println("</table>");
	out.println("</body>");
	out.println("</html>");
        
	out.flush();
	out.close();
    }
    
    public void destroy() {
    }
    
}