Hello Howard
and community
First, thanks for all the efforts put into this
great Web-Framework.
Second, I try to add a new dimension to it by
creating a general flash-component. You might ask, what is that good for.
Well, I have created a Flash-Texteditor with may features (for
weblog-application). This is much easier to do in Flash than in
DHTML/Flashscript and with FlashRemoting (propietary) or Apache
XML-RPC the Editor can talk to a servlet and even do things lilke
spell-checking. But here comes my problem. After studying for two days the
Tapestry RequestCycle, my Flashcomponent was neither capable to store the URL
nor to initialize propperly a ActionListener.
To handle that stuff in a simple servlet would be
very easy, because the FlashClient simple puts an attributes into the
HttpServletRequest, which is used as argument for invoking
serverside-functions, and then puts the result back in the HttpServletRequest.
So I created a very simple FlashComponent which just handles the HTML-Tage for
embeding the flash-object and I put all the Logic into the servlet by
overiding the doService-Method in the ApplicationServlet, see my codefragments
commented es flash-ugly-hack-1 and flash-ugly-hack-2.
Obviously, this is NOT how components should be
created. But how can I create a real Component with a listener which is
triggered when I "submit" form the flashclient ? I tried to modify the
Link- and Form-Componentts, but without success. Any help is highly
appreciated.
regards
Roberto
abstract public class FlashApplicationServlet extends ApplicationServlet
{
...
...
protected void doService(HttpServletRequest
request, HttpServletResponse response)
throws IOException,
ServletException
{
//flash-ugly-hack-1
boolean flashRequest =
false;
String flashParameter0 =
null;
Object o =
request.getAttribute("FLASH.PARAMS");
if ( o !=
null)
{
flashRequest =
true;
List args = (List)
o;
flashParameter0 =
(String) args.get(0);
}
RequestContext context =
null;
try
{
// Create a
context from the various bits and pieces.
context = new
RequestContext(((ApplicationServlet) this), request, response);
// The subclass
provides the engine.
IEngine engine =
getEngine(context);
//
flash-ugly-hack-2
if
(flashRequest)
{
String result =
flashParameter0 + ((Visit)
engine.getVisit()).getUser().getEmail();
request.setAttribute("FLASH.RESULT", result);
}
.......
