Re: Messages with Webmacro

There are many ways to handle this situation, but throwing an exception is
not one I would recommend.  Typically the Servlet just puts some error info
into the context and then the template checks for the error info and
displays a message to the user, e.g.,

// handler code in Servlet
...
if (!valid(request)) {
   context.put("ErrorMsg", getLocalizedMsg(INVALID_DATA));
   // reload form with error message
   template = formTemplate;
}
else
{ // display verification page to user
   template = verifyTemplate;
}
...

## template
...
<form ...
#if ($ErrorMsg) {
  <p class="ErrorText">$ErrorMsg</p>
}
...
#if ($Form.someName){
  #set $val = $HTMLEscape($Form.someName)
}
#else {
  #set $val = ""
}
<input name="someName" type="TEXT"
     value="$val" />
...
</form>
...

Hope this helps.

Keats

----- Original Message ----- 
From: "Dominik" <[email protected]>
To: <[email protected]>
Sent: Saturday, July 09, 2005 7:29 PM
Subject: [WebMacro-user] Messages with Webmacro


> Hy,
> I'm using Webmacro to develop a small Webapp. No I ran into problems
> because
> I need a function to call, if I want to post a Message.
> For example, take a guestbook-webapp: When you submit the entry-form the
> app
> checks whether all entered data is ok, when it is ok, then a page with the
> data is displayed (via a template). But, when the data is not wellformed
> then there should be a message telling the user to go back and refill the
> page. As a solution I found out that I could throw a HandlerException, but
> I
> want the message to be shown in my own layout. The Handler-Exception also
> produces another Problem:
> On every Page-Request the app gets a database-connection from a
> connection-pool and puts it back on the very and of each handler-call.
> But,
> when I throw a Handler-Exception the end of the handler-call is never
> reached so the connection isn't put back into the pool.
>
> Is there a solution?
>
> Thanks
> Dominik
>
>
>
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