Display a message when JSP is waiting for a process to be completed

How to display a message on the browser when JSP is waiting for a process to be completed.

Help urgent .....
Thanks
Arschie
aarschieAsked:
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kennethxuCommented:
two options:

option 1:
write out the message and followed by <%out.flush()%;>, then start your process.

option 2:
use 2 pages,
in page1.jsp, use refresh header, e.g.:
<html>
<head>
<META HTTP-EQUIV=Refresh CONTENT="0; URL=page2.jsp">
</head>
<body>
please wait!
</body>
</html>

in page2.jsp, do your process.
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aarschieAuthor Commented:
Actually I have first.jsp which calls a second.servlet to process the form fields. It takes couple of minutes to process it. I want to display a message on first.jsp once submit button is pressed to wait until the second.servlet is processed and redirects to another JSP.
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kennethxuCommented:
use option 2 then. instead of redirect to page2.jsp, just use URL=second.servlet. e.g.
first.jsp submit to second.jsp

second.jsp:
<%
  // get necessary parameters and save then in session.
%>
<html>
<head>
<META HTTP-EQUIV=Refresh CONTENT="0; URL=servleturl">
</head>
<body>
please wait!
</body>
</html>

servlet:
get parameter form session stored by second.jsp. process and redirect to final.jsp
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applekannaCommented:
Display a temporary page like we get in sites like expedia.com when you request a travel price search.

and then when you get the results just to a request dispatcher forward, from the servelt.
If you need more clarification do mail again
Hope this helps.
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sudhakar_koundinyaCommented:
page1.jsp

<%
   if(session.getAttribute("refresh")!=null)
   {
            //check whethere process is completed
            if(processcompleted)
            {
              session.removeAttribute("refresh");
            }
%>
<html>
<head>
<META HTTP-EQUIV=Refresh CONTENT="0; URL=page2.jsp">
</head>
<body>
please wait!
</body>
</html>
<%
   }
   else
   {
%>
            <html>
<!--             Your submission code to page2.jsp -->
            </html>
<%

   }

%>


page2.jsp

<%
   //process for your submission code
   session.setAttribute("refresh","true");
   response.sendredirect("page1.jsp");
%>
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sudhakar_koundinyaCommented:
if you think session is burden use cookie
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sudhakar_koundinyaCommented:
kennethxu,

i didn't see your code. My code is similar to yours. Sorry
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sudhakar_koundinyaCommented:
Modified version of mine and  kennethxu's idea


page1.jsp

<%
   if(session.getAttribute("refresh")!=null)
   {
            //check whethere process is completed
            if(processcompleted)
            {
              session.removeAttribute("refresh");
            }
%>
<html>
<head>
<META HTTP-EQUIV=Refresh CONTENT="0; URL=page1.jsp">
</head>
<body>
please wait!
</body>
</html>
<%
   }
   else
   {
%>
            <html>
<!--             Your submission code to page2.jsp -->
            </html>
<%

   }

%>


page2.jsp

<%
   //process for your submission code
   session.setAttribute("refresh","true");
   response.sendredirect("page1.jsp");
%>
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jarasaCommented:
Hi all.
There is a much easier way to display a message and it works faster and better besides you can make a good look. Just make a hidde <div> on your page and before submit you show it, it will be there until next page load in, and pop up inmediatly becose is already loaded.

But this is an HTML thing, anyway here you have the code:

<Script>
function sendForm() {
      document.all.processing.style.visibility = "visible";
      document.forms[0].submit();

}
</script>


<Form>
<Input type=button value="Send Form" OnClick="JavaScript:sendForm()">
</Form>
....
<div id="processing" style="position:absolute; z-index:100; top:140; left:265; width:280; height:134; clip:rect(0px 280px 134px 0px); visibility:hidden">
<table cellpadding=0 cellspacing=0 border=0 Width=100% Height=100% align=Center>
      <tr>
            <td width=125 align="center" class="v10blancong">
            
                  Put here the message you want, I use an animated GIF with a Clock and a moving message "Processing ....."
                  
            </td>
      </tr>
</table>
</div>


Have Fun
Javier
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jarasaCommented:
I don't want any points here It really does not matter but I believe that the answer I posted is as valid as any of the other ones, to tell the truth is faster and easier to implement, but....

:c)

Javier
0
girionisCommented:
Yes your code should work, you are right. Sorry I should have actually included you in the split. I hope a moderator will also award some points to you.
0
jarasaCommented:
As I said Girionis I'm not interested on the points, just on giving solutions, but .... :c)

Javier
0
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