code: public boolean dispatch(String dispatch, String[] parameters)// throws IOException
  	{
  		String dispatchURL = dispatch;
  		HttpServletRequest servletRequest = httpRequest.get();
  		HttpServletResponse servletResponse = httpResponse.get();
  		//set content type, because otherwise the response
  		//  may be interpreted as text/plain
  		servletResponse.setContentType("text/html; charset=UTF-8");
  		try
  		{
  			//pass set attributes as new servlet parameters (a hack to get rid of)
  			Request request = requestRegistry.getCurrentRequest();
  			if(request != null) {
  				for (Object name : request.getAttributeMap().keySet())
  				{
  					Object o = request.getAttributeMap().get(name);
  					servletRequest.setAttribute(name.toString(), o);
  				}
  			}
  			//servlet-include, servlet-forward, service-invocation
              switch(this.dispatchMode)
  			{
  				case FORWARD:
  				{
  					ServletSupport.forward(dispatchURL, servletRequest, servletResponse);
  				}
  				default://INCLUDE
  				{
  					ServletSupport.include(dispatchURL, servletRequest, servletResponse);
  				}
  			}
  		}
  		catch (ServletException e)
  		{
  			throw new ResourceException("failed to dispatch servlet request to " + dispatchURL, e);
  		}
  		catch (IOException e)
  		{
  			throw new ResourceException("failed to dispatch servlet request to " + dispatchURL, e);
  		}
  		return true;
  	}
docs: Iglu request attributes will be copied to the servlet request.
  
  @param dispatch
  @param parameters
  @return
  @throws ServletException