Can't make page parameter work

[pdpantages]

Hello Forum,

I am using:
Jboss 4.2.2.GA
Seam 2.0.1.GA
Richfaces 3.2.1.GA

I was trying to use a page parameter as described in the manual.

I created my entry in pages.xml

<page view-id="/view/utils/attachment.xhtml" action="#{mediaAction.myAction}">
   <param name="mediaid" value="#{mediaAction.mediaid}" />
</page>

A simple test class

@Scope(STATELESS)
@Name("mediaAction")
public class MediaActionBean {
    
    /** Creates a new instance of MediaActionBean */
    public MediaActionBean() {
        System.out.println("PDP MediaActionBean CTOR");
    }

    private String mediaid;

    public String getMediaid() {
        System.out.println("PDP GET meidaId " + mediaid );
        return this.mediaid;
    }

    public void setMediaid( String mediaid ) {
        System.out.println("PDP SET meidaId " + mediaid );
        this.mediaid = mediaid;
    }

    public void myAction()
    {
        System.out.println("PDP myaction");
    }

}

Test page contains:

<h:outputText value="Attachment id #{mediaAction.mediaid}"/>    

However, when I test it. I never see the setter for mediaid, or the method for the
page action ever called. I see the CTOR and a call to getMediaid()
which returns null. The bookmark/URL I use to test is constructed like so:

http://172.30.0.204:8080/client/view/utils/attachemnt.seam?mediaid=7ac37dd2-454d-4d18-a560-9c498894dba1

I must have done something wrong, but I can't seem to see it.

Any hints will be greatly appreciated.

Thanks, PdP

[ericjava.eric.chiralsoftware.net]

I think the stateless scope is a problem.  Each time the stateless object is referred to, it can be referring to a brand-new one that has no knowledge of the past.   When you say:

<param name="mediaid" value="#{mediaAction.mediaid}" />

you are referring to one mediaAction object.  When you later say:

<h:outputText value="Attachment id #{mediaAction.mediaid}"/>

you are referring to a new mediaAction that has not been initialized.

------------------

JBoss Seam seminar

[pdpantages]

Hello Eric, thank you for the suggestions.

Stateless might be an issue, but I don't think that it is the root of this problem. I have tried an @Stateful MediaActionBean, and the result is basically the same; the page parameter is not set and the page action is not called.

I have found that an @RequestParameter on the mediaId will set it (without calling the setter method; I see no println output), but the page action is still not called.

One of the examples in the manual (Example 1.34/35) uses a stateless scope.

PdP

[ericjava.eric.chiralsoftware.net]

Are you sure the view id: view-id="/view/utils/attachment.xhtml" in pages.xml is correct?  I'm guessing that the /view part of the path shouldn't be there?

[ericjava.eric.chiralsoftware.net]

And by the way, if your class looks like this:

@RequestParameter private String mediaid;
public void setMediaid(String s) { ...

then the setter won't be called.  It will set mediaid using reflection.

You could say it as:

private String mediaid;
@RequestParameter public void setMediaid(String s) { ...

and the setter should be used then.

[pdpantages]

Hello again,

I did not think of moving the @RequestParameter, thank you....
I may be able to get by with this, as I can put some code in the setter to initialize the bean.
(what I had planned to do with the page action).

Wrt. the view-id in pages.xml, I am certain that it is correct. My view root is /client, not /client/view. Also, I have other, similar entries in pages.xml, mostly for use in the seam-workspaces page(conversation switcher), that work correctly.

PdP

[ericjava.eric.chiralsoftware.net]

If your view root is /client and not /client/view, then how could the view ID /view/utils/attachment.xhtml be correct?

[pdpantages]

Hi Eric, I guess I should have said that my context-root is /client ....
E.g., in application.xml,

<context-root>/client</context-root>

PdP

[ericjava.eric.chiralsoftware.net]

And so within the /client directory, you have a view directory?  I think the Seam-gen apps have a view directory, but the view path element itself doesn't show up in the WAR directory.

[pdpantages]

Hello again,

I did not use seam-gen for this project. In the war file, the path starts with view dir. E.g, this is what is in the war file:

  /build/new/centina/sa/client/exploded-archives/client.war:
  total used in directory 112 available 32982816
  drwxr-xr-x 10 pdp pdp  4096 2008-07-14 22:09 .
  drwxr-xr-x  5 pdp pdp  4096 2008-07-14 22:08 ..
  -rw-r--r--  1 pdp pdp    71 2008-07-14 22:09 components.properties
  drwxr-xr-x  2 pdp pdp  4096 2008-07-14 22:09 css
  drwxr-xr-x  2 pdp pdp 12288 2008-07-14 22:09 img
  -rw-r--r--  1 pdp pdp    91 2008-07-14 22:09 index.html
  drwxr-xr-x  4 pdp pdp  4096 2008-07-14 22:09 js
  drwxr-xr-x  2 pdp pdp  4096 2008-07-14 22:09 META-INF
  drwxr-xr-x  3 pdp pdp  4096 2008-07-14 22:09 partner
  drwxr-xr-x  2 pdp pdp  4096 2008-07-14 22:09 reports
  drwxr-xr-x 15 pdp pdp  4096 2008-07-14 22:09 view
  drwxr-xr-x  5 pdp pdp  4096 2008-07-14 22:09 WEB-INF

The url (see first post) does take me to the proper page; I think the path component is OK.

[mail.micke]

Hiya

Looks to me like there is a typo: attachemnt in the link you posted in the first post vs. attachment in pages.xml

- micke

[pdpantages]

Why, thank you micke, for that keen observation.  This was the problem all along :(.

Also thanks to Eric for taking a look.

PdP