Re: phase event...

Thu, 17 Nov 2005 11:51:12 -0800

Of course using Clay means a totally different layout technology, just like using Facelets. That's not necessarily bad (JSP sucks) but it may or may not be possible for you (JSP is unfortunately mandated for the project I'm currently on).
In the email thread referenced by Volker I did suggest one possible solution while staying with JSP. It's a bit hacky but I don't see why it wouldn't work. See the last paragraph of my response here: 
 http://www.mail-archive.com/users%40myfaces.apache.org/msg11991.html

Regards,

Simon

PS: I hate top-posting!!

Ryan Wynn wrote:

This kind of thing may be put into shale clay as well.  It's not there
yet, but I have been writing to Gary V. to put it in.

See the following thread -
http://www.mail-archive.com/dev%40struts.apache.org/msg13515.html

Basically, the idea is that with commons chain you get a hook that
lets you access the component tree a component has been created but
before it is rendered.  And you do not have to have application
created components via binding attribute like Volker mentioned.  Also
it should work with the case of tree being created dynamically and
tree being restored.

Your command impl could look like this:

public class SetRenderedCommand implements
org.apache.commons.chain.Command {
public boolean execute(Context ctx) throws Exception {
  ClayContext clayCtx = (ClayContext) ctx;
  FacesContext facesCtx = clayCtx.getFacesContext();
  UIComponent parent = clayCtx.getParent();
    if ("clayView".equals(clay.getId())) {
              // scan component tree and set rendered appropriately     
    }
  return false;
}
}

And add a chain-config.xml to WEB-INF like this:

<catalog           name="clayCustomization">
  <chain           name="postprocessAddComponent">
    <command  className="com.foo.SetRenderedCommand"/>
  </chain>
</catalog>

Not this is not yet implemented.  But hopefully will be soon ;)


On 11/17/05, Mariano Petrakovsky <[EMAIL PROTECTED]> wrote:

Thanxs... I will try!

:)

--
Mariano G. Petrakovsky
Programmer · Software Factory
AXG Tecnonexo -  www.tecnonexo.com

Development facilities:Av. Maipú 1252 8º (C1006ACT) · Buenos Aires ·
Argentina.
Tel.: (54-11) 4878-0005 - Fax: (54-11) 4878-0065.

Headquarters: 1604 Spring Hill Road, Suite 160 Vienna · VA 22182 · USA.
Tel.: (202) 986-7541 - Fax: (202) 787-3891.


· · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·
· · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·
· · · ·

-----Mensaje original-----
De: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] nombre de Craig
McClanahan
Enviado el: Jueves, 17 de Noviembre de 2005 15:27

Para: MyFaces Discussion
Asunto: Re: phase event...



On 11/17/05, Mariano Petrakovsky <[EMAIL PROTECTED]> wrote:

Hi Craig... and what about Volker Weber post...?

If I set rendered property false to a component in before render method,

works now?

Thanxs ! :)

It depends on whether you are:

* Using JSP with the standard ViewController (which in JSF 1.1 builds
  the tree dynamically on the first pass through.).

* Redisplaying the same page, so that the component tree is already
  created.



Craig




--
Mariano G. Petrakovsky
Programmer · Software Factory
AXG Tecnonexo -  www.tecnonexo.com

Development facilities:Av. Maipú 1252 8º (C1006ACT) · Buenos Aires ·

Argentina.

Tel.: (54-11) 4878-0005 - Fax: (54-11) 4878-0065.

Headquarters: 1604 Spring Hill Road, Suite 160 Vienna · VA 22182 · USA.
Tel.: (202) 986-7541 - Fax: (202) 787-3891.


· · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·

· · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·
· · · · ·


-----Mensaje original-----
De: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] nombre de Craig

McClanahan

Enviado el: Jueves, 17 de Noviembre de 2005 15:01
Para: MyFaces Discussion
Asunto: Re: phase event...





On 11/17/05, Mariano Petrakovsky <[EMAIL PROTECTED]> wrote:

I have a table into database, with the ids of some fields in a page with

a

boolean attribute  "visible".

My Jsf pages are all ready, then I need dynamically catch a phase before
render, look each component in this page an look in the database if this
field just be rendered.

I think i need put an phase listener... if is true... where I can read

how

make this?


Yes, a phase listener is the strategy you'd want for this.  The basic idea

would be to have the backing bean for your page register itself (probably in
the constructor) as a phase listener for the Render Response phase, and then
in the beforePhase() event handler you'd do the scan of components and set
the "rendered" properties appropriately.  Don't forget to also deregister
yourself as a listener (in the afterPhase() event method) to avoid memory
leaks.

Or, just use Shale's ViewController API, and put your "check the database"

code in the prerender() method.  Shale will do all the event listener wiring
for you, so you don't have to.

    http://struts.apache.org/shale/

Reply via email to