Hello Paul,
When I had to do this in a past project, I used ADF Faces/Trinidad's progressIndicator with a poll. The indicator allow you to add an action launched when the process terminates. So what I did was launch the long process on another thread and have the current request load the "processing..." page. The poll was then asking the server if the second process terminated every two seconds.
Regards,
~ Simon
| Jeff Bischoff <[EMAIL PROTECTED]>
2006-08-28 12:28
|
To: MyFaces Discussion <[email protected]> cc: Subject: Re: How to implement a "Processing, please wait..." page? |
Paul,
I recently had to implement a "please wait" page, though my requirements
were slightly different. I was redirecting to a non-JSF page (Crystal
Reports viewer, from the JRC in fact). Since the crystal JSP would block
until the query was finished, I simply displayed my wait page once, and
then immediately forwarded to the results page. The results page
wouldn't write anything out until it was all ready, so the wait page
stays on screen.
You will doubtless need a slightly different approach, but if it helps
any, you can take a look at what I came up with. It is based off of some
generic JSP wait page example I found online.
See attachment (assuming the attachment worked)
Regards,
Jeff Bischoff
Kenneth L Kurz & Associates, Inc.
Paul Spencer wrote:
> I need to implement a "Processing, please wait..." page that is
> displayed when a long query is running. The backing bean currently has
> a method that returns "processing" or "done" to indicate the processing
> state of the query. When "processing" is returned, the "Processing,
> please wait..." page is to be displayed for 1 second then then
> processing state will be checked again.
>
> So how can I implement the above?
>
>
> Paul Spencer
>
>
>
<%@ page contentType="text/html; charset=iso-8859-1" language="java" %>
<%@ taglib uri="http://java.sun.com/jsf/html" prefix="h" %>
<%@ taglib uri="http://java.sun.com/jsf/core" prefix="f"%>
<%@ taglib uri="http://myfaces.apache.org/tomahawk" prefix="t"%>
<%
if ( session.getAttribute("waitPage") == null ) {
session.setAttribute("waitPage", Boolean.TRUE );
}
else {
session.removeAttribute("waitPage");
response.setContentType( "text/html" );
response.sendRedirect("CrystalReportViewer.jsp");
}
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<f:view>
<f:verbatim>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<title>Please Wait...</title>
<meta http-equiv="Refresh" content="0">
<style type="text/css" media="screen">
#Content {
width:343px;
margin:0px auto; /* Right and left margin widths set to "auto" */
padding:200px 0px 0px 5px;
}
</style>
</head>
<body>
<div id="Content">
</f:verbatim><h:graphicImage value="/pages/images/loading.gif" width="343" height="93" alt=""/><f:verbatim>
</div>
</body>
</f:verbatim>
</f:view>
</html>
