JSF page load question

This is my first app in jsf and getting a very basic problem
I need to display a grid and few other controls to filter this grid with pre initialization data. The bean I want to be request scope only.
Now I have initialized my grid data/bean in constructor and I get the required inputs as request paramaters.
The first time page is getting loading successfully.When I modify any filter crieteria - ajx/non ajax requests - the bean constructor is always called and so the data is also alwayz reinitialized.
The problem i get is with request parameters, i need to pass them always in every request againand again because all initialization is happening at constructor level and at this point the properties are not bound to the bean.
Is there any better way to do this in JSF 1.2?

Use in this way in your JSP. Use the javascript you want use instead of name1().
<script language="JavaScript" type="text/JavaScript">
<![CDATA[
function name1() {
statement1...
window.onload = name1;
]]>
</script>

Similar Messages

On JSF Page load UI components loading sequence

Hi All,
I have some questions about the UI components loading sequence on the JSF page load.
When a JSF page loads it loads its UI components which have a sequence of getters and setters declared in the backing bean of that jspx page.
Qustion 1: How these getters and setters in backing bean work in loading the jspx page?
Question 2: How this backing bean is related to the Page Definition file for the page loading?
Question 3 (main query): What is the sequence of the getters and setters. Means, if i drop 3 UI components, 1 input text, then a command button and then an output text, then they are accordingly declared in backing bean. On page load first i/p texts getter gets called, then setter, then command button's and theno/p texts, in these sequence.
But can i manipulate their sequence of loading. If yes then how it can be possible?

Answer 1: Getters and Setters in bean normally will be bounded to ui component's properties in jspx page, when jspx page loads these getters get called through introspection and setters gets called when a request is submitted.
Answer 2: Backing bean and page definition are two different entities and they are no way related unless you have a data control for the backing bean and have bindings for those methods in page definition file
Answer 3: The sequence of getters and setters depends on the order of the components they bounded to in jspx page. components in jsf page gets loaded from top to bottom so the getter bound to the top component gets called first and the getter bound to bottom component gets called last.
The only way to change the sequence of getter methods getting called is to just change the order of the components they bound to in jspx page.
Usually, it is not suggested to put business logic inside getters and setters, where you have action and actionlisteners for the same. If you follow that, you don't need to worry of the sequence of getters and setters execution
Sireesha

Method call before visual web jsf page loads

Hi All.....
I have written a method in a java class that accesses the mysql backend db to check if a process is still running. If the process is still running, a JOptionPane is produced informing the user of this and offers an <ok> option(to check the process status again) and a <cancel> option(to redirect the user to the homepage). If the process is completed, I want the page to just load as normal. I want this method to be called before the visual web jsf page loads. I have the method call in the super_init() method of the page and everything seemed to be working fine, the problem I have run into is that if I set the value in the db to show the process is running, the JOptionPane is produced(like it should be), and then if I set the value to show the process has completed and choose <ok> from the pane, the page loads.....this is what I want. Now, after the page loads, if I set the value in the db to show the process is running again, the JOptionPane is produced again right after I apply the changes to the db edit!!!!. I don't know why this is happening. Should I be calling the method from somewhere other the super_init()????? I have tried the method call in the prerender(), preprocess(), and destroy() methods all with the same results.
Anyone have any ideas on what the problem could be??
Thanks in advance.
Silgd

The Java part of a JSP/Servlet based webapplication runs physically at the server machine.
Only the HTML/CSS/JS part which is generated by the webapplication and sent to the client physically runs at the client machine.
JOptionPane is a Java Swing component which thus runs at the server machine. So you as client would only see it when both the server and the client runs at physically the same machine. Which is often only the case in development environment and doesn´t occur in real life! There is normally means of two physically different machines connected through the network/internet.
To solve your actual problem, look for Ajax poll techniques. To display an alert or confirm dialogue in the client side, you use Javascript for this.

Execute ViewObject with Parameters at JSF Page Load? JSF/ADF/BC 10.1.3

This 'should' be a simple problem, but I'm not seeing an answer, no doubt because I'm not searching for the right thing.
I have a page that has a grid populated by a view object that has a couple of named parameters. I have the values stored for the parameters based upon actions the user has already taken before they navigate to this page. I need to pass the parameters to the view object and open the query up without any user intervention, preferable before (or at) page load.
I see I can drag an 'ExecWithParams' from the data control pallette, but it looks like it would default to having the user enter the parameter values, which is what I'd like to avoid.
In a previous life I had events available like 'OnCreate' where I'd put code like this, but I'm still learning to think in JSF/Java.

Ok, now I see how it's supposed to work. Pretty straightforward if you know where to look. It raises another question for me though...
In my process, I've got the user logging in, at which point a series of user preferences are extracted from the database. My first thought was to store them somehow in the users' session, but I didn't see a way to do that, so I created my own implementation of it with a bunch of getter/setter methods, inside the data model of the project. Unfortunately, I can't see a way to surface them without putting them in the ApplicationModule and adding them to the client interface. In the interim, I came across some utilities methods (written by Steve Muench and Duncan Mills) called ADFJSFUtils and JSFUtils. In the JSFUtils there's this method:
void storeOnSession(String key, Object object) {
FacesContext ctx = getFacesContext();
Map sessionState = ctx.getExternalContext().getSessionMap();
sessionState.put(key, object);
I assume it's designed to work in the ViewController project (since I haven't been able to call it from my Model project) .
This has been a long way to ask: What's the best/recommended way to store variable values for the users' session is a way that I can access them for binding to view objects (as you described above)? I'd love to just implement the storeOnSession right in my appplication module, but it lacks the context, apparently.

ADF/JSF page loads when any command button is clicked

Hello All,
I am lost in the ADF/JSF page flow (using Jdev 10.1.3). Following are the tags (in order) in my page;
(WHEN THIS PAGE LOADS, IT GOES TO THE DATABASE TO GET VALUES (for the drop down lists that will appear on the page); THIS SHOULD HAPPEN JUST ONCE AND AT THIS POINT)
<f:view>
<afh:body>
<afh:html>
<af:form>
<af:panelpage>
<f:facet name="contextSwitcher">
<af:panelHorizontal> has a af:commandLink </af:panelHorizontal>
</f:facet>
<f:facet name="messages">
<af:messages/>
</f:facet>
<af:panelform>
<h:panelGrid columns="2" cellspacing="14">
has 2 panelgroups (one group has *2 SelectOneChoice lists (that need to be populated by fetching data from database* and the other group has 2 CommandButtons - 'Go' and 'Cancel") (GO BUTTON SETS THE SHOWPANEL() TO TRUE)
(WHEN GO BUTTON IS CLICKED, THE PAGE GOES TO THE DATABASE (AS IT DID ON PAGE LOAD). *THIS SHOULD NOT BE HAPPENING*. ONLY THE METHOD (action="#{muBean.doWork}" )THAT IS ASSOCIATED WITH GO BUTTON ACTION SHOULD BE CALLED)
</h:panelGrid>
<h:panelGrid columns="2" cellspacing="14" rendered="#{myBean.showPanel}"> (THIS ONE IS RENDERED WHEN SHOWPANEL() METHOD IS TRUE)
has 3 inputText fields
</h:panelGrid>
<af:table var="someTable" rendered="#{myBean.showPanel}"> (THIS ONE IS RENDERED WHEN SHOWPANEL() METHOD IS TRUE)
has a bunch of af:columns
</af:table>
<af:panelHorizontal rendered="#{myBean.showPanel}"> (THIS ONE IS RENDERED WHEN SHOWPANEL() METHOD IS TRUE)
has 3 af:commandButtons - submit, save, add row
(WHEN submit or save or add row BUTTON IS CLICKED, THE PAGE KIND OF LOADS AND GOES TO THE DATABASE (AS IT DID ON PAGE LOAD). *THIS SHOULD NOT BE HAPPENING*. ONLY THE METHOD THAT IS ASSOCIATED WITH submit/save/add row BUTTON ACTION SHOULD BE CALLED)
</af:panelHorizontal
</af:panelForm>
</af:panelPage>

<jsp:include page="/pages/includes/footer.jspx"/>
</af:form>
<f:verbatim>
<script type="text/javascript" src="../script/tree.js"></script>
</f:verbatim>
</afh:body>
</afh:html>
</f:view>
</jsp:root>
_*why is it that when the command buttons are clicked, the whole page is loaded? Only the methods associated with the action (action="#{newMapRequestItem.addARow}" ) should be called.*_
_*IS THERE A WAY TO AVOID THIS WITHOUT USING PARTIAL PAGE RENDERING ?*_
_*DOES MY TAG NESTING LOOK OK?*_
Edited by: user12054715 on Mar 24, 2010 12:00 PM

Can somebody please address this?
Thanks,

JSF Page Load

Is there such thing as a JSF Init Page Load? the same thing that .net has with Page_Load? How do i init the code behind bean?

@sdechgan
I had the same problem. What you can do is the following:
in your Bean you need all your request parameters as properties with getter and setter.
additionally add a boolan prepare property. Set this to false at the beans constructor : this.prepare = false;
in your faces config define your bean this way :
<managed-bean>
        <managed-bean-name>myBean</managed-bean-name>
        <managed-bean-class>org.you.package.beans.myBean</managed-bean-class>
        <managed-bean-scope>request</managed-bean-scope>
        <managed-property>
             <property-name>requestParam01</property-name>
             <value>#{param.requestParam01}</value>
         </managed-property>
         <managed-property>
             <property-name>requestParam02</property-name>
             <value>#{param.requestParam02}</value>
         </managed-property>
         <managed-property>
             <property-name>prepare</property-name>
             <value>true</value>
         </managed-property>
    </managed-bean>in your view add such a single line at the beginning ( right under <f:view... > )
<h:panelGroup rendered="#{myBean.prepare}" />now, tomcat will execute myBean.getPrepare( )
this method should look like this :
public boolean getPrepare()
          if (prepare)
               //do what you want with your request params. they are already set at this point !
          prepare = false;
         return prepare;
     }after loading the view once, the getPrepare Method is executed and the prepare property is set to false.
I need that, because getPrepare is loaded at any ajax page reload, too. ( I'm using icefaces )
access your jsf page with : http:localhost:8080/whatever/myPage.iface?requestParam01=hello&requestParam02=World

Alternating iframe display per page load question

Looking to have an iframe that displays different content each time the page is loaded to showcase sponsors; I'm not interested in a slide show type option; just one sponsor's logo & contact per each unique page load.
Any thoughts?
Thx,
nf

Hi,
This feature has been moved in Exchange 2010 OWA. However this feature is available in OWA light version. Here are steps to change the settings in OWA light version.
Log in to OWA, click the Use the light version of Outlook Web App
check box on the login page.
Select Options in the upper right hand corner of the screen.
Select Messaging from the left navigation panel.
In the section for "Message Options", change the "Number of items to display per page", select the desired number of messages.
Exchange 2010: OWA versus OWA light.
http://blogs.technet.com/b/ilvancri/archive/2010/04/07/exchange-2010-owa-versus-owa-light.aspx
New Features in Exchange 2010 OWA.
http://technet.microsoft.com/en-us/library/aa998629(v=exchg.141).aspx
Best Regards.

Problem with JSF Page loading with WAS 6.1.0.2

We are using Trindad Faces & the app server is Websphere 6.1.0.2.
When the server starts up, its gives lots of logs (does not say error or warning) as below.
11:13:58:881 EST] 00000019 jsf W com.ibm.ws.jsf.configuration.FacesConfigParser parseShared FacesConfigParser.parseShared(): unable to locate : [group]
[11/10/06 11:13:59:061 EST] 00000019 jsf W com.ibm.ws.jsf.configuration.FacesConfigParser parseShared FacesConfigParser.parseShared(): unable to locate : [property-metadata]
[11/10/06 11:13:59:231 EST] 00000019 jsf W com.ibm.ws.jsf.configuration.FacesConfigParser parseShared FacesConfigParser.parseShared(): unable to locate : [group]
[11/10/06 11:13:59:372 EST] 00000019 jsf W com.ibm.ws.jsf.configuration.FacesConfigParser parseShared FacesConfigParser.parseShared(): unable to locate : [property-metadata]
[11/10/06 11:13:59:532 EST] 00000019 jsf W com.ibm.ws.jsf.configuration.FacesConfigParser parseShared FacesConfigParser.parseShared(): unable to locate : [group]
[11/10/06 11:13:59:782 EST] 00000019 jsf W com.ibm.ws.jsf.configuration.FacesConfigParser parseShared FacesConfigParser.parseShared(): unable to locate : [property-metadata]
[11/10/06 11:13:59:942 EST] 00000019 jsf W com.ibm.ws.jsf.configuration.FacesConfigParser parseShared Face
And, when I try to access the Page, the following error message is shown up and the page is not getting displayed.
java.lang.NullPointerException
at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:754)
at org.apache.myfaces.trinidad.render.RenderUtils.encodeRecursive(RenderUtils.java:66)
at org.apache.myfaces.trinidad.render.CoreRenderer.encodeChild(CoreRenderer.java:255)
at org.apache.myfaces.trinidad.render.CoreRenderer.encodeAllChildren(CoreRenderer.java:277)
at org.apache.myfaces.trinidadinternal.renderkit.core.xhtml.PanelPartialRootRenderer.renderContent(PanelPartialRootRenderer.java:70)
at org.apache.myfaces.trinidadinternal.renderkit.core.xhtml.BodyRenderer.renderContent(BodyRenderer.java:134)
at org.apache.myfaces.trinidadinternal.renderkit.core.xhtml.PanelPartialRootRenderer.encodeAll(PanelPartialRootRenderer.java:150)
at org.apache.myfaces.trinidadinternal.renderkit.core.xhtml.BodyRenderer.encodeAll(BodyRenderer.java:76)
at org.apache.myfaces.trinidad.render.CoreRenderer.delegateRenderer(CoreRenderer.java:294)
Any thoughts on what could be the issue?
Thanks in advance!!

Hi Raymond,
Is it possible to package a JSF implementation with your web application and then use the usual classloading order?
* Tried that, looks like that wont work. WAS throws all sorts of exceptions :
java.lang.NoSuchMethodError: javax/servlet/jsp/JspFactory.getJspApplicationContext(Ljavax/servlet/ServletContext;)Ljavax/servlet/jsp/JspApplicationContext;
+Caused by: org.springframework.binding.expression.EvaluationException: An ELException occurred getting the value for expression 'ehrRequest.savePractice(practice)' on context [class org.springframework.webflow.engine.impl.RequestControlContextImpl]+
+.....+
What about hiding the JMS queuing behind an EJB (that way the JMS happens in the EJB container, not the web container, a total hack but what can you do)? Have you tried moving all of your classes and libraries from the WAR and into the application space?
Thats actually a pretty good idea. I am gonna try that.

JSF page loading another JSF in iframe from same domain with diff port

I was wondering if anyone has experienced this issue. I'm using ADF 11g and weblogic 10.3.2. Here's the scenario
1. two ADF 11g application, app1 and app2
2. app1 is deployed on managedserver1 running on port 7001
3. app2 is deployed on managedserver2 running on port 7002
4. page1 on app1 loads page2 from app2 inside an iframe.
5. When a button is clicked on page1 that does a ppr or even a complete postback, the following message from the browser appears:
Because of inactivity, your session has timed out and is no longer active. The page will automatically be reloaded in 10 seconds; if not, click here.
When i check the log file on managedserver1 its has the following error:
SEVERE: Could not find saved view state for token <some token>
I did some research and came across oracle.adf.view.rich.security.FRAME_BUSTING, but this is not the issue here, the iframe loads fine, but after loading when i tried to do something on page1 it seems that the state of the page is messed up.
Any idea would be helpful.
Edited by: user8663354 on Jun 20, 2010 7:05 PM

Hi,
chances are that the iframe is not isolated as you think it is and the state management of the two overrides each other. I think its best to file a service request with customer support to ensure this scenarion is supposed to work
Frank

Firing a method of backing bean on Page Load

Hi all,
Can anyone tell me how a method of the backing bean can be fired when the corresponding jsf page loads in the browser...
in fact some data is to be fetched from the server at the time of page load and rendered in one of the fields ... kindly help me in this regard ...
thanks in advance,
Neeraj Upreti

You can use a constructor or initialization block of the bean for this or maybe even introduce lazy loading in the getters, all depending on the expensiveness of the actual logic.
If you're using JSF 1.2, you can also use the beforePhase attribute of the <f:view> to specify a method which is to be fired on beforePhase of the view. You can also add @PostConstruct annotations to the methods which are to be fired on construction of the bean.

Blank index.jsp and some jsf pages within WebContent folder

Hi dear all,
I have a problem with a blank index.jsp forwarding to a jsf file i.e. <jsp:forward page="/pages/xxx.jsf" />
I have tested with index.html (is showing with right contents), index.jsp (page loaded but blank), index.jsf (page loaded but blank).
Web Server details : Tomcat 6.0.18 running on Linux.
Folder structure is
Webapps
|-----<application>
|---------WebContent
|---------pages (same level as WEB-INF)
|---------WEB-INF (same level as WEB-INF)
within WEB-INF, web.xml is as follows:
============================
<?xml version="1.0"?>
<!DOCTYPE web-app PUBLIC
"-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"http://java.sun.com/dtd/web-app_2_3.dtd">
<web-app>
<context-param>
<param-name>javax.faces.STATE_SAVING_METHOD</param-name>
<param-value>server</param-value>
</context-param>
<context-param>
<param-name>javax.faces.CONFIG_FILES</param-name>
<param-value>/WEB-INF/faces-config.xml</param-value>
</context-param>
<listener>
<listener-class>com.sun.faces.config.ConfigureListener</listener-class>
</listener>

<servlet>
<servlet-name>Faces Servlet</servlet-name>
<servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
<load-on-startup> 1 </load-on-startup>
</servlet>

<servlet-mapping>
<servlet-name>Faces Servlet</servlet-name>
<url-pattern>*.jsf</url-pattern>
</servlet-mapping>
<session-config>
<session-timeout>35</session-timeout>
</session-config>
</web-app>
But direct access to jsf files within pages directory is showing, which is not desirable.
Can someone advise me why?
Many thanks and have a good day,
May

Mei_Liew wrote:
I have a problem with a blank index.jsp forwarding to a jsf file i.e. <jsp:forward page="/pages/xxx.jsf" />You forgot to tell more about the problem. What happens? What happens not?

How to query from view with parameter, only when the JSP-page loading

I use JSF/ADF BC, create two viewes:view1 and view2, in the JSP page the user press a button to query from the view1, but I hope the view2 can be queried only when the page loading, it have no relation with user-operator, and pass the column value of view2 into some variables, the view2 return one record.

Hi -
You may want to have a look at this other thread:
Re: Execute ViewObject with Parameters at JSF Page Load? JSF/ADF/BC 10.1.3
John

How to clear the Managed Bean Values prior to load a JSF page

Hello.
I have a jsf page that contains fields that need to be cleared BEFORE the page is loaded.
My managed bean where the fields are linked (I�m using the value attribute) is in the SESSION scope because I need to control they values across a popup window and if I use request scope, my vectors that load objects like dataTable are cleared when I post the form.
My question is :
How I CLEAR all the values in the managed bean BEFORE the page is loaded ???
In the WebForms (Microsoft .NET) I have an method on the codebehind called Page_Load where I put my initialization code for my page.
Thanks in advance.
Rog�rio

Rog�rio,
You can do this with a PhaseListener. Just regiser a new listener for the RESTORE_VIEW phase, and implement the beforePhase method; you can do this in the backing bean's constructor, or somewhere elase. This is pretty much the same as the Page_Load event handler in .NET.
Kito D. Mann
Author, JSF in Action
http://www.jsfcentral.com - JSF news, info, and FAQ
Hello.
I have a jsf page that contains fields that need to be
cleared BEFORE the page is loaded.
My managed bean where the fields are linked (I�m using
the value attribute) is in the SESSION scope because I
need to control they values across a popup window and
if I use request scope, my vectors that load objects
like dataTable are cleared when I post the form.
My question is :
How I CLEAR all the values in the managed bean BEFORE
the page is loaded ???
In the WebForms (Microsoft .NET) I have an method on
the codebehind called Page_Load where I put my
initialization code for my page.
Thanks in advance.
Rog�rio

Loading page animation while JSF page is being loaded

JSF 2.1
Mojarra 2.1.7
JBoss 7.1.1
The backing bean on my JSF page(s) are view-scoped, and during the initial request, the backing bean's @PostConstructor method may take some time to return as it is calling external systems that are outside of my control. Thus, during the RENDER_RESPONSE phase of the initial request to the JSF page, it may take, on average, 3 to 5 seconds to return ( sometimes longer than that .... which again, is outside of my control ). While this is happening, the page rendered is of course blank as the response has not been written yet.
Naturally, I am thinking of a way to show an animated loading image.
1) I have seen suggestions of using a4j:status and a4j:region, but these are only valid for Ajax requests, while what I need is something that I can use during the initial request ( not a post back ), of a JSF lifecycle.
2) Suggestions of using two HTML divs... one DIV shows the animated image while the other DIV wraps the real content, but is initially hidden. Then use window.onload() to swap the style of the two DIVs so that the DIV wrapping the real content becomes visible while the DIV wrapping the animated image becomes hidden.
But then again ... these DIVs will NOT be written to the response yet as I am still in RENDER_RESPONSE phase.
The only thing that I can think of is to:
3) Create another page whose sole purpose is to show the animated image, then somehow immediately forward the request to the real page. The animated image on the first page will hopefully continue animating until the final page is rendered.
What have you guys done ?

jmsjr wrote:
gimbal2 wrote:
3(alt)) show a view which displays the animation and then triggers the long-loading page to be requested (no forward). The long-loading page does not generate any response until there really is something to show, to keep the animation view visible.
This was the simplest solution by far .. although there are some quirks to be deal with when using IE.As usual :/ It remains a questionable product no matter how many times they reinvent the wheel.

How to Use another JSF page that I load by XMLHttpRequest?

Hi everyone, I'm a newbie of JSF and curisous about how to load page content seperately by AJAX.
I saw example of Java Blue Print. It's load some data to use in page. What I want is to load another JSF page when click a link or button, (Like include another page). And work with functions privoided by loaded JSF Page.
My example is, In a main page. I request a JSF page and set it into a div layer.
var requestURL = "/admin/customer/customer-list-body.faces";
var content = postDataWithoutContent(requestURL); divContent.innerHTML = content;
All JSF components are required under <f:view>, thus action of form is set as "action='"/admin/customer/customer-list-body.faces'"
But my page is main.jsp. Each time I click command button in customer-list-body.faces, the url will change to customer-list-body.faces, I want to request and hold in main.jsp.
What can I do then? Any advices?

Hi,
the list doesn't seem to be your problem. You need to track down the illegal argument exception. Once you have that sorted out, expose the method on the AM so it gets shown as a method binding. The return values then could be picked up in a managed bean to create the select Item list
Frank

JSF page load question

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