Servlet filter to skip cache in WebSphere Commerce

NoCacheFilter.java

package com.fct.wcs.cache;

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 org.apache.commons.lang.StringUtils;
import com.ibm.commerce.server.JSPHelper;

public class NoCacheFilter implements Filter
{
	public static String NOCACHE_PARAMETER_NAME  = "nocache";
	public static String NOCACHE_PARAMETER_VALUE = "true";	
	
	@Override
	public void destroy() {
	}

	@Override
	public void doFilter(
		ServletRequest request, ServletResponse response, 
		FilterChain chain) throws IOException, ServletException 
	{
		String noCache = request.getParameter(NOCACHE_PARAMETER_NAME);
		if (!StringUtils.isEmpty(noCache) && noCache.equalsIgnoreCase(NOCACHE_PARAMETER_VALUE)) {
			request.setAttribute(NOCACHE_PARAMETER_NAME, NOCACHE_PARAMETER_VALUE);
			JSPHelper.setUncacheable(((HttpServletRequest)request), true);
		}
		chain.doFilter(request, response);
	}

	@Override
	public void init(FilterConfig filterConfig) throws ServletException {
	}
}