3 Replies Latest reply on Feb 1, 2010 11:12 AM by piotr.sobczyk

How to change pages.xml to control page flow

granite2009 Jan 30, 2010 1:43 AM

I am new to SEAM. I generated a SEAM project both using seam gen and Eclipse JBoss Tools respectively. The login screen works. However, I cannot re-direct the login page to any page. I always go back to home page. I am looked everywhere for samples pages.xml without luck. I know this must be something simple that I forget to do. Plesse help.

<?xml version="1.0" encoding="UTF-8"?>
<pages xmlns="http://jboss.com/products/seam/pages"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://jboss.com/products/seam/pages http://jboss.com/products/seam/pages-2.2.xsd"

       no-conversation-view-id="/home.xhtml"
       login-view-id="/login.xhtml">

    <page view-id="/login.xhtml">
        <navigation>
            <rule if-outcome="login">
                <redirect view-id="/login2.xhtml"/>
            </rule>
        </navigation>
    </page>
</pages>

1. Re: How to change pages.xml to control page flow

piotr.sobczyk Jan 30, 2010 9:46 AM (in response to granite2009)
It's simple indeed :). You have a fragment:

<navigation> <rule if-outcome="login"> <redirect view-id="/login2.xhtml"/> </rule> </navigation>

You have to take care that the button/link that invokes navigation is:

<h:button action=login/>

<h:button action=#{someBean.someAction}/> - where someAction return String value login

<s:button view=/login2.xhtml/> - then you don't need navigation at all
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2. Re: How to change pages.xml to control page flow

granite2009 Feb 1, 2010 7:13 AM (in response to granite2009)

Thanks for you reply. That's what I found from the documentation. It did not work for me. I wasted 2 weeks on this. That's what I come up.
1. There is a page named login.page.xml in the view folder that control the page flow. This is not documented in Seam 2.2. When I changed from /home.xhtml to /login2.xhtml, it worked.

<?xml version="1.0" encoding="UTF-8"?>
<page xmlns="http://jboss.com/products/seam/pages"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xsi:schemaLocation="http://jboss.com/products/seam/pages http://jboss.com/products/seam/pages-2.2.xsd">

   <navigation from-action="#{identity.login}">
      <rule if="#{identity.loggedIn}">
         <redirect view-id="/home.xhtml"/>
      </rule>
   </navigation>

</page>

2. I can control page flow if my bean return a page id, ie /login2.xhtml. This is not good since the page flow is hard coded in the bean.

I just which this login.page.xml is documented. When it is a good time to use individual page control of pages???
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3. Re: How to change pages.xml to control page flow

piotr.sobczyk Feb 1, 2010 11:12 AM (in response to granite2009)
1.

There is a page named login.page.xml in the view folder that control the page flow

Are login.page.xml and login.xhtml files in the same directory? There is a possibility to use many *.page.xml files for individual pages instead of one pages.xml descriptor. But you need to be sure that:

both page and navigation descriptor for it are in the same directory

page and descriptor have the same name except of extension

For example you can have a directory tree:

Pages

mypage.xhtml

mypage.page.xml

But maybe you should start from pages.xml global descriptor if something goes wrong - it's simplier case.

The xml code you pasted seems to be correct.

2. Yeah, it's rather a bad practice.

When it is a good time to use individual page control of pages???
you mean using *.page.xml instead of pages.xml? It really depends of your own preferences. But in my opinion you should choose one and keep it strictly, don't use both in the same application. *.page.xml allows you quickly find descriptor for some specific page you just type page name in "open resource" view in your IDE and you quickly found page descriptor instead of searching through one big pages.xml file.
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