JSF action before the page is displayed?

Hi all,
What's the best way to execute a backing bean method before the page is rendered?
I have to fill out some selectOneMenus on the page with a backing bean method.
Will the onload JavaScript function in the <body> tag do this for me? How does one call a JSF method from JavaScript?
Thanks for any help!
Illu

Why not just bind the value of a selectOneMenu to a list of SelectItems, like this:
                    <h:selectOneMenu styleClass="selectOneMenu" id="acctprodMenu" value="#{accountServiceMappingAction.mappingBean.acctPrdId}" >
                         <f:selectItems value="#{adjustmentsInit.accountProducts}"/>
                    </h:selectOneMenu>      Where in the adjustmentsInit bean, there is a method like this:
     public List getAccountProducts() {
          ArrayList temp = new ArrayList();
          Iterator itr = someService.getAccProdList.iterator();
          while (itr.hasNext()) {
               AccountProduct acct = (AccountProduct) itr.next();
               SelectItem item =
                    new SelectItem(
                         new Integer(acct.getAccountProductId()),
                         acct.getAccountProductName());
               temp.add(item);
          return temp;
     }This way, once you load the page, it will have what you need in it.

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Execute a method before a page is displayed?

I love JSF, but I have continuously run in to a wall trying to figure out how to execute code before a page is displayed. Is there some Listener/Binding mechanism that I could tap into that would be called before Render Response?
A Phase Listener is too general, I don't want something that walks the tree for every request.
Action/ValueChange Listeners are only called after a user takes an action.
Putting calls (for example DAO) in getter methods works in some circumstances, but is fragile and is insufficient when you need to populate multiple fields on a bean but only want one (DB) call. (You can put it on the first one that will be called, but this destroys reusability).
The only sucessful strategy I have found is having an init() that returns boolean and calling it from the first <h:outputText> on the screen's render field. This is obviously a painful hack.
This is a general question, but my current scenario is a single DB lookup needs to get a list of beans before a page is displayed. (users can link directly to the page). Once the lookup is complete the list of beans is displayed in 3 seperate data tables with 3 seperate action bindings. So it doesnt really make sense to do the db lookup in one get method that populates the 2 other lists, though it would be a functional approach.
Any thoughts?

I love JSF, but I have continuously run in to a wall
trying to figure out how to execute code before a
page is displayed. Is there some Listener/Binding
mechanism that I could tap into that would be called
before Render Response? In vanilla JSF? No.
In JSFTemplating: yes.
It provides an "initPage" event which is invoked every time a page is "initialized" (which may be a long time before it is displayed). It also provides an <event> component which includes a "beforeEncode" event which is invoked during renderring.
A Phase Listener is too general, I don't want
something that walks the tree for every request. I agree.
Action/ValueChange Listeners are only called after a
user takes an action. Yep.
Putting calls (for example DAO) in getter methods
works in some circumstances, but is fragile and is
insufficient when you need to populate multiple
fields on a bean but only want one (DB) call. (You
can put it on the first one that will be called, but
this destroys reusability).Exactly.
The only sucessful strategy I have found is having an
init() that returns boolean and calling it from the
first <h:outputText> on the screen's render field.
This is obviously a painful hack.Yep.
This is a general question, but my current scenario
is a single DB lookup needs to get a list of beans
before a page is displayed. (users can link directly
to the page). Once the lookup is complete the list of
beans is displayed in 3 seperate data tables with 3
seperate action bindings. So it doesnt really make
sense to do the db lookup in one get method that
populates the 2 other lists, though it would be a
functional approach.The "events" I mentioned above for JSFTemplating allow any # of parameterized "handlers" to be invoked. "handlers" are more reusable than #{} method bindings due to their support for multiple inputs and outputs. You also do not have to do any faces-config.xml file configuration, they are defined via Java SE 5 @annotations.
If you want examples or help trying this out... let me know. JSFTemplating pages can be mixed with JSPs as well... although once you start using JSFTemplating pages, you're not likely to make any more JSP pages.
Good luck!
Ken Paulsen
https://jsftemplating.dev.java.net
Any thoughts?

Dynamically setting where clause parameter before the page load

Hi Experts,
I do have the following requirement.
I am working on jsf page in ADF10.1.3.3. I have a View Object which displays the results on the screen. Can someone provide me some example where I can dynamically set the where clause parameter to my Query in VO before the Page Load happens(By Overriding the Prepare Model) and display results on screen.
Thanks

Hi,
Thanks for yor advice.
I need to write the method in Prepare Model method when the page loads and not in AM.
Here in the page there is no action as such.
On the Page load we need to directly set the Where Clause on the VO.
Provide me some examples if any.
Thanks

Which components of jsp are worked right before the page sent to server

hello
In a jsf application
I want to know in java bean which components of jsp are worked right before the page sent to server.
how can I do that ?
regards

So you want to know which component was activated to cause the request to be submitted. If you use an action listener, you will have the ActionEvent which contains the source component.

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Are you getting this ad page on every single website you go to, or just a few?
If it's everyone, I'd suspect a virus or some sort.
You can try some of the following programs to scan for malware:
* [http://www.malwarebytes.org/mbam.php MalwareBytes' Anti-Malware]
* [http://support.kaspersky.com/faq/?qid=208283363 TDSSKiller - AntiRootkit Utility]
* [http://windows.microsoft.com/MSE Microsoft Security Essentials] (A good permanent anti-virus if you don't already have one)
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http://portableapps.com/apps/internet/firefox_portable/localization#legacy36

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Hi All,
I am working on Jdeveloper 11.1.1.5. I have developed an application where i have used a jspx page and used the controller class which implements the phaselistener(containing before phase and after phase) to get done the validation and other business logic on pageload(before page gets loaded).
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Please suggest!!!
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How to not have your view objects query before the page comes up?

Hello. I have a view object that is part of a LOV. This view object always gets queried on bringing up the page (I need it to happen on the LOV click) How can I have the VO not queried initially? I tried setting the Iterator to refresh never, but it still does it. Here's the log before the page comes up:
[363] BindingContext.put( ContactsAMDataControl@irepair_DataBindings_cpx, oracle.jbo.uicli.binding.JUApplication )
[364] Resolving VO:ContactsVVO1 for iterator binding:ContactsVVO1Iterator
[365] Changing iterator range size from :1 to :25
[366] ContactsVVO1 ViewRowSetImpl.execute caused params to be "un"changed
[367] Column count: 13
[368] ViewObject: ContactsVVO1 Created new QUERY statement
[369] ContactsVVO1>#q computed SQLStmtBufLen: 663, actual=623, storing=653
[370] select
oc.JOB_TITLE,
oc.PARTY_SITE_ID,
RELATIONSHIP_ID ,
hp.PARTY_NAME OBJECT_NAME, -- Contact
OBJECT_ID ,
hr.PARTY_ID ,
oc.CONTACT_KEY,
subject_id,
hp.EMAIL_ADDRESS,
hp.primary_phone_country_code,
hp.primary_phone_area_code,
hp.primary_phone_number
from HZ_ORG_CONTACT_ROLES ocr,
HZ_ORG_CONTACTS oc,
HZ_PARTIES hp,
HZ_RELATIONSHIPS hr
where
hp.party_id = hr.object_id
and hr.RELATIONSHIP_ID=oc. PARTY_RELATIONSHIP_ID
and oc.ORG_CONTACT_ID = ocr.ORG_CONTACT_ID(+)
and relationship_code = 'CONTACT'
order by OBJECT_NAME
[371] Bind params for ViewObject: ContactsVVO1
[372] DCUtil, returning:oracle.adf.model.binding.DCParameter, for ContactsAMDataControl
[373] LOCALVIEW_USAGE_com_craneae_services_hz_vvo_ContactsVVO_ContactsVVO1 ViewRowSetImpl.execute caused params to be "un"changed
[374] Column count: 13
[375] ViewObject: LOCALVIEW_USAGE_com_craneae_services_hz_vvo_ContactsVVO_ContactsVVO1 Created new QUERY statement
[376] LOCALVIEW_USAGE_com_craneae_services_hz_vvo_ContactsVVO_ContactsVVO1>#q computed SQLStmtBufLen: 663, actual=623, storing=653
[377] select
oc.JOB_TITLE,
oc.PARTY_SITE_ID,
RELATIONSHIP_ID ,
hp.PARTY_NAME OBJECT_NAME, -- Contact
OBJECT_ID ,
hr.PARTY_ID ,
oc.CONTACT_KEY,
subject_id,
hp.EMAIL_ADDRESS,
hp.primary_phone_country_code,
hp.primary_phone_area_code,
hp.primary_phone_number
from HZ_ORG_CONTACT_ROLES ocr,
HZ_ORG_CONTACTS oc,
HZ_PARTIES hp,
HZ_RELATIONSHIPS hr
where
hp.party_id = hr.object_id
and hr.RELATIONSHIP_ID=oc. PARTY_RELATIONSHIP_ID
and oc.ORG_CONTACT_ID = ocr.ORG_CONTACT_ID(+)
and relationship_code = 'CONTACT'
order by OBJECT_NAME
[378] Bind params for ViewObject: LOCALVIEW_USAGE_com_craneae_services_hz_vvo_ContactsVVO_ContactsVVO1
Thanks!
Edited by: user621288 on Jun 17, 2009 4:11 PM

There are two ways:
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        vor.setNamedWhereClauseParam("bnum", new BigDecimal(1));
        vor.executeQuery();
    }

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JSF action before the page is displayed?

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