JSF Doubts

Hello,
I need some inputs regarding a small application which I am planning to develop using JDeveloper.
I need to create two interfaces, one for creating categories and another one a master detail for creating questions.
When I drop the view from data pallette, it's asking me to select different types like ADF form, ADF creation etc. Which one to select?
Where can I find a good tutorial for building a samll application?
Thanks in advance.

Did you try the JDeveloper tutorials page? check any of the ADF related tutorials there.

Similar Messages

JSF doubt

Hi,
I have a jpg image and i want to make this jpg image a button. I mean the value of the button should be the jpg image.
like
<h:commandButton value="autorepair.jpg" type="submit">
Please help

<h:commandButtonn >
has image attribute ...you can give the image path there

My doubts with JSF

From what I've learned about JSF so far, it is based on really good ideas but it is extremely frustrating to use if you wanna do more than just a "hello world" application.
Unfortunately, the reasons for my doubt seem to have made their way into JSF 2.
It all boils down to this: Component creation is a mess.
[1] casts and use of reflection everywhere
JSF combines disadvantages of Servlet based applications (need to recompile and restart context after changes) with some of scripted applications (no build time checks).
A lot of internal wiring is String based and cannot be validated at build time. Casts are needed everywhere, which has the same effect.
Besides, this makes custom component code really ugly.
[2] no good solution for component rendering
- Servlet-style inline HTML rendering sends us way back to the 90s. Hard to write, hard to read, hard to maintain.
- no support for HTML/CSS developers: they would have to work inside the renderer (Java code) but it's THEIR domain
- no simple strategy for creating first-class composite components
(by "first-class" i mean components with a Java-side behaviour (methods); Facelets compositions are cool but you cannot add logic)
Please don't get me wrong - I'd love to use JSF but I'm not eager to recommend it if every developer in my department will hate me for it.
So if anyone can show me that I'm wrong, it would make me happy!

I don't know what your requirements are, but I have written a couple dozen JSF applications over the last several years.
At least half of these have been commercial applications for the company I work for.
Some have been very simple - maybe half a dozen pages or so, and some have been VERY complex - upwards of 30 or more pages with very complex logic behind the scenes.
My background is from the application world, and I have been frustrated to some extent with JSF.
However, being able to create a page with a minimum amount of pain and being able to tie them into the backing beans for complex logic has been quite useful.
In several applications, I generate components dynamically in the backing bean code - that works fine.
I do not create custom components, since I have not found the need to do so.
All the basic functionality is in the standard JSF component libraries - although there are some things I would like to see.
I have found some things lacking, when compared to a strict Java (Swing) application environment, but have usually found adequate workarounds.
I have found that third party libraries - particularly ICEfaces makes the pages quite useful without having to do a bunch of JavaScript code.
There are third party libraries with some pretty robust components.
You may find that some of these have the functionality you need rather than developing your own custom components.
I don't know your requirements for custom components, but if you can get by with the standard libraries, or third party components, I do not think you will find an easier environment.
I am not sure why you are concerned so much about Casts.
This is basic to Java and most other programming languages, including C, C++, C## and to some extent Fortran and VB.
I guess some scripting languages are exceptions.
At any rate, for Java based web applications, I don't think there is an easier environment.
If you are going to be doing web applications, I think the only serious options are JSF or .NET.
I've used .NET a bit (not as much as JSF) and, IMHO, .NET probably has more flexibility and more robust components, but it was harder for me to use.
That may have just been the learning curve.

Doubts abour JSF proccesing lifecycle and JSF phases

Hi,
I have doubts about the processing lifecycle of a JSF application if there are two different requests from the same user. For example, suppose an application with two buttons:
Button 1 --> A load button connected to a actionListener method that load a lot of data from data base that will be showed in a table.
Button 2 --> A Cancel button with immediate=true and connected to a action method that force a navigation to the same page when is pressed.
Suppose the following sequence:
1 -. User press button 1, I think that the following phases are executed:
Request View --> Apply Request Values --> Proccess Validation --> Update model Values --> Invoke Application (in this phase the actionListener method is executed to load the data from database) --> Render Response (take long time)
2-. Due to a big quantity of data the Render Response take long time and when the lifecycle is in that phase the user press the button 2. I suppose that the following sequence of phases are executed:
Request View --> Apply Request Values -->Invoke Application (Action method that return a navigation case) --> Render Response (Render the page to the user)
My question is, if the first request is in the Render Response phase, what happens with this phase when the second request generated by the Button 2 arrive to the server??? When the second request arrive to the server, JFS automatically cancel or stop the proccesing of the Render Response of the first request ?
Thank you for your knowledge.

It's always helpful to configure a "debugging" lifecycle listener that just prints out each lifecycle phase, so you can tell which phases are being executed, and in which phase some breakpoint is hit.
This is as simple as:
package tabpanelbug;
import javax.faces.event.PhaseEvent;
import javax.faces.event.PhaseId;
import javax.faces.event.PhaseListener;
public class LifeCycleListener implements PhaseListener
    public void beforePhase(PhaseEvent event)
    { System.out.println("BeforePhase: " + event.getPhaseId()); }
    public void afterPhase(PhaseEvent event)
    { System.out.println("AfterPhase: " + event.getPhaseId()); }
    public PhaseId getPhaseId()
    { return PhaseId.ANY_PHASE; }
}and
<lifecycle>
    <phase-listener>tabpanelbug.LifeCycleListener</phase-listener>
</lifecycle>

Doubts about JSF 2.0 lifecycle

1)Is FacesContext stored in request scope at the beginning of the lifecycle?
2)Is the component tree populated with components mainly in render response phase? when a page is requested for the first time, the restore view phase creates a empty UIViewRoot and in the render response phase the tree is populated with components. Also in the render response phase, the navigation handler determines whether to display current view or a completely new view. If a new view is to be displayed, the component tree is populated with components in the render response phase. So component tree seems to be populated mainly in render response phase, isn't it so?
3)The render response state caches the 'current' state of the component tree in the render response phase. What exactly does 'current' mean? If we have a tree having input components with some user entered values, are the values also stored or they are removed before the tree is cached?
4)In what scope does render response cache the component tree?
5)Once a user request a page, a component tree is cached. Is the created tree available for all users or for a particular user for whom the tree was initially created?

N.B. I haven't studied JSF 2.0 too deeply, but I do not think any of the answers below are different for 2.0 vs 1.2.
nash_era wrote:
1)Is FacesContext stored in request scope at the beginning of the lifecycle?The FacesContext is stored in a thread local static variable. This is how the static FacesContext.getInstance() method can work while your application server services multiple clients.
>
2)Is the component tree populated with components mainly in render response phase? when a page is requested for the first time, the restore view phase creates a empty UIViewRoot and in the render response phase the tree is populated with components. Also in the render response phase, the navigation handler determines whether to display current view or a completely new view. If a new view is to be displayed, the component tree is populated with components in the render response phase. So component tree seems to be populated mainly in render response phase, isn't it so?Once case you haven't mentioned is the post back of a previously rendered page. In this case the component tree is restored during the Restore View phase. It is this restored tree that is in effect for the remaining phases up to Execute Application. Then the navigation handler determines the next view and it is created if necessary.
>
3)The render response state caches the 'current' state of the component tree in the render response phase. What exactly does 'current' mean? If we have a tree having input components with some user entered values, are the values also stored or they are removed before the tree is cached? If the same view that was restored is to be rendered, then the values entered by the user may be re-used. (I say may because they might get cleared if the Update Model phase is successful. It that case the value expression is re-evaluated to get the value rendered.)
>
4)In what scope does render response cache the component tree?The cached view roots are in the session.
>
5)Once a user request a page, a component tree is cached. Is the created tree available for all users or for a particular user for whom the tree was initially created?Only for the particular user. Also, if the outcome of the action method is non-null, you will get a new instance of the tree even if it is the same view id as the last one.

Jsf html tags usage doubt

Hi All,
I see some jsf applications using <h:output_text> and some other jsf applications using <h:outputText> html tags. What is the difference between the two. Is the former from older jsf specifications ?
Thanks & Regards,
Kumar.

That's it.
<h:output_text> is from old articles/books.
Now it's <h:outputText>

Problems while deploying a JSF/ ADF Faces App to Apps Server 10.1.3.0.1

Dear All,
I built a JSF based application (Using ADF Faces Components) developed in JDeveloper 10.1.3.1.0 (Application Configuration: [JSF, ADF BC]. The application is running fine with the embedded OC4J intance (automatically aunch by JDeveloper).
I am now trying to deploy it on the installed Oracle Application Server (running on the same local machine). The details of the versioning for different components in this App server are as follows:
1. OracleAS J2EE 10.1.3.0.0
2. Oracle ADF 10.1.3.1.0
The deployment steps I followed (as given in Chapter 34 of 'Oracle ADF - Developer's Guide for Forms/4GL Developers') seems to be running smoothly. This is because the deploy process ends up showing no erros in the message window.
However when I tried to test the application with a browser using the Apps Server URL (HTTP://localhost:8888/<my-app>/<firstfile.jspx>), I am finding 'Page not found error'.
I also tried a manual deployment (using deploy to a WAR file then copy the resulting war & ear files and the xml descriptor file to the Apps server's http root) and gives the war file URL in the browser.
In this case now I am getting the following error page:
=====================================================
The XML page cannot be displayed
Cannot view XML input using style sheet. Please correct the error and then click the Refresh button, or try again later.
An invalid character was found in text content. Error processing resource
'http://localhost:8888/HousingWithADF.war'.
=====================================================
Any idea?
Regards,
Irfan Ilyas
PS: I am doubtful about creation of Deployment Descriptors step as the documentation is not very clear about exactly which descriptors we need to create. Using my own idea, I tried to create J2EE descriptor, and one tld (taglibrary) file. However, the manual war deployment generates only the tld file in the deploy folder.

Thanks for the hint.
OBSERVATION #1:
After looking through the administration console for OC4J instance, I found my application name with UP status. When drill-down further, the console gives me the URL which can be used to test the application.
While using the URL, a different error message was found:
URL: http://localhost:8888/KFUPMHousing/
Error:
====================
HTTP 403:(Forbidden)
================
You are not authorized to view this page
You might not have permission to view this directory or page using the credentials you supplied.
From my experience of Microsoft IIS, I know here I may need to configure the folder permissions for a web-user. But exactly which user and where it is defined (at OS Level or in AS), I am not much sure.
Can you elaborate?
OBSERVATION #2:
The log text for my application shows the following error (for the attempt I did with the URL shown above)
Log Text
07/01/05 22:43:38.62 HousingWithADF: JspServlet: unable to dispatch to requested page: Exception:java.io.FileNotFoundException: C
:\product\10.1.3.1\OracleAS_1\j2ee\home\applications\HousingWithADF\HousingWithADF\HosReqInfo.jspx (The system cannot find the file specified)
However, I can browse the file on my local disk in the path specified with a little change in the path. The file is found in 'pages' folder within the last folder,named HousingWIthADF. I tried to move the file in the exact path specified in the log and now finding the 'Page not found' error.
Any idea?
Irfan Ilyas

"Bad" markup for non-English language in JSF

Hi,
the question emerged in "Problem ADF af:document i18n" thread, but, as I saw, it is more common, so I made this new thread. The question seems very simple, but by the moment I can't find an answer and it makes me doubt about the ability to use JSF...
The sequence of my actions.
1. My OS locale is russian (ru) (codepage windows-1251).
2. Create a new application in JDev.
3. Create an empty project in JDev.
4. Create a new jsf page. JDev suggests windows-1251 encoding, creates faces-config.xml and so on.
5. Place outputText JSF HTML component on the page. JDev creates the following markup: <h:outputText value="outputText1"/>.
6. Change value="outputText1" to "text_in_russian".
7. Run the page!
The result looks OK, text is displayed correctly, but, if you look at the source code, though codepage is windows-1251, all russian symbols are encoded like & # 1058;& # 1077;& # 1082;& # 1089;& # 1090; (i put spaces, as otherwise you'd see russian letters: Текст). As far as I understand, this means overrun of traffic and besides I don't like the idea that my pages are so "untidy" behind.
I specified default locale in faces-config.xml file, changed encoding and so on, but result was the same: everything looks fine, but entities instead of letters in html code.
By the way, if I specify russian text, where it is not rendered, it is seen normally. But, if it is a rendered text, no matter, how - by outputText, inputText component or, for example, af:document or af:panelPage - entities instead of letters in the source code.
Do you have any ideas?
Thanks in advance, Valeriy

Hello, <br>
resulting page is windows-1251 encoded - that's OK.
If I write page using, say, just HTML (in Notepad) or JSP, every symbol would take exactly 1 byte - in windows-1251 encoding, all Russian letters, are, of course, encoded with 1 byte. I would use entities or escape-sequences only for special characters, like copyright. And this is the behaviour I expect from JSF - since I use windows-1251 encoding for my pages, it must use 1 byte for russian letters. Why use entities or escape-sequences if letters are normally preseted with 1 byte?<br>
For example, similarly, english letters are too can be written using & # xxxx, but, I think, everybody would be very surprised to look at the source code, resulting from JSF, and see that all english letters are written using & # xxxx. - again, why use entities and escape-sequences, if it is posible to make resulting HTML markup more understandable and consuming less space?<br>
JSTL tags, for example, c:out, use "right" markup - exactly 1 byte for russian letters. Can I get such behaviour with JSF?<br>
Imagine situation I described with english letters: you place, say, <h:outputText value="outputText1"/> in your code and expect to receive something like <span>outputText1</span>, but receive <span>& # xxxx; & # xxxx; & # xxxx;1</span>, while it is possible to use 1 byte for letter! Besides a "bad" look, this page will weight, say, 200K instead of 50K!<br>
And the question is russian language must not be special for windows-1251 encoding!<br>
I found such question at several forums, no decision found yet... And besides there can be JavaScript problems...<br>
Waiting for your response
Valeriy

JSF Navigation: Unexepcted value for action in h:form tag

Hi
I am running simple JSF application and when I click the button, it stays in the same page rather than the output page.
I found that the resulting Html code has form action and that action is referring to current page.
here is my JSF code...
<%@ page language="java" contentType="text/html; charset=ISO-8859-1" pageEncoding="ISO-8859-1"%>
<%@ taglib prefix="f" uri="http://java.sun.com/jsf/core"%>
<%@ taglib prefix="h" uri="http://java.sun.com/jsf/html"%>
<f:loadBundle basename="gov.ca.dmv.dmvar.bundle.messages" var="msg"/>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>enter your name page</title>
</head>
<body>
   <f:view>
     <h1>
      <h:outputText value="#{msg.inputname_header}"/>
     </h1>
     <h:form id="helloForm">
      <h:outputText value="#{msg.prompt}"/>
      <h:inputText value="#{personBean.personName}" />
      <h:commandButton action="#{personBean.clickSearch}" value="#{msg.button_text}"></h:commandButton>
     </h:form>
   </f:view>
</body>
</html> Here is my html source
<html>
<head>
<title>enter your name page</title>
</head>
<body>
     <h1>
      Welcome to EASE
     </h1>
     <form id="helloForm" method="post" action="/RSample/index.jsf;jsessionid=5AD3913EE84D54EF78A6F46B2AFFFB79" enctype="application/x-www-form-urlencoded">
      Tell us your name:
      <input type="text" name="helloForm:_id2" />
      <input type="submit" name="helloForm:_id3" value="ENTER" />
     <input type="hidden" name="helloForm" value="helloForm" /></form>
</body>
</html> I am giving the action for a button and its not attaching the action for the button ..but its assiging to the form action with wrong value.
Anything I missed here?
--Varma

I am using JSF1.2
I found in html code ...
<form id="helloForm" method="post" action="/RSample/index.jsf;jsessionid=5AD3913EE84D54EF78A6F46B2AFFFB79" enctype="application/x-www-form-urlencoded">My index.jsp file is just forwarding to 'inputname.jsp'
In 'inputname.jsp' i have created a text box and a button.
<html>
<body>
<jsp:forward page="/pages/inputname.jsp"></jsp:forward>
</body>
</html>inputname.jsp
<%@ page language="java" contentType="text/html; charset=ISO-8859-1" pageEncoding="ISO-8859-1"%>
<%@ taglib prefix="f" uri="http://java.sun.com/jsf/core"%>
<%@ taglib prefix="h" uri="http://java.sun.com/jsf/html"%>
<f:loadBundle basename="gov.ca.dmv.dmvar.bundle.messages" var="msg"/>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>enter your name page</title>
</head>
<body>
   <f:view>
     <h1>
      <h:outputText value="#{msg.inputname_header}"/>
     </h1>
     <h:form id="helloForm">
      <h:outputText value="#{msg.prompt}"/>
      <h:inputText value="#{personBean.personName}" />
      <h:commandButton id="button1" onclick="#{personBean.clickSearch}" value="#{msg.button_text}"></h:commandButton>
     </h:form>
   </f:view>
</body>
</html> PersonBean.java
package gov.ca.dmv.dmvar.common;
public class PersonBean {
        String personName;
        * @return Person Name
        public String getPersonName() {
           return personName;
        * @param Person Name
        public void setPersonName(String name) {
           personName = name;
        public String clickSearch(){
             return "greeting";
     }faces-config.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE faces-config PUBLIC
    "-//Sun Microsystems, Inc.//DTD JavaServer Faces Config 1.1//EN"
    "http://java.sun.com/dtd/web-facesconfig_1_1.dtd">
<faces-config>
<navigation-rule>
   <from-view-id>/pages/inputname.jsf</from-view-id>
    <navigation-case>
     <from-outcome>greeting</from-outcome>
     <to-view-id>/pages/greeting.jsf</to-view-id>
   </navigation-case>
</navigation-rule>
<managed-bean>
    <managed-bean-name>personBean</managed-bean-name>
    <managed-bean-class>gov.ca.dmv.dmvar.common.PersonBean</managed-bean-class>
    <managed-bean-scope>request</managed-bean-scope>
</managed-bean>
</faces-config>There are no errors after submitting. My only doubt is I am binding the commondButton action to bean method. But in the html code the <form action is referring to index.jsp?

Tiles, jsf and css

Hi,
I use JSF with Tiles for the first time to built a web application.
I have a problem with my stylesheet which I use for my layout and the other pieces of pages.
When I start my application, the first page works and the look and feel uses the stylesheet. But when I call an other page, the stylesheet isn't apply. I know there is a problem with the context path ...
For the moment, I declare my stylesheet like that :
<link rel="stylesheet" href="/css/style.css" type="text/css">
So, it works only the the first page.
I tried like this, thanks to the struts html tags :
<link rel="stylesheet" href="<html:rewrite page='/css/style.css'/>" type="text/css">
but this time, i have an error :
[ServletException in:/tiles/layout.jsp] org.apache.struts.taglib.html.MessagesTei'
If someone has a solution ...
thanks..

Will you please explain to me how you are doing CSS layout? I am having a problem with JSF 1.1 RI as everything is in a <td>. I want to get rid of these and change the rendered markup to output <div>s unless I can alter the location of <td>s on the page. This sounds like it would break the table model, so I doubt this is possible.
Thank you for any input,
TacoEater

Using Arrays in JSF

Hi
Please help me with the below issue.
I am having an array which stores the details of employees. The size of this array is dynamic i.e., if a new employee is added the size of array is incremented by one. My requirement is to display the employee details present in this array in the front end(using h:outputText value="#{get the value from the array}").
Since I am new to JSF technology please guide me how to achieve this.

Hi
I have a doubt in using datatable for iterate over an array. i have to mention the "rows" attribute if i use the datatable. If my array is dynamically changing its size based on the updations i.e., if 10 employees are newly appointed this array size will be incremented by 10 and then the rows attribute also need to changed(incremented by 10 in this case). I am not sure about this but this is my doubt...Could you please clarify

How to implement a "plugin system" in JSF?

Hi!
I would like to make a system with can be extended using JAR (or WAR?) plugins...I know how to do using Swing but I'm new in JSF and I have a lot of doubts, I'm trying to find something on the net, I know I can force the navigation to go to a specific page (I can put the entry page of every plugin in a database) but can I mix 2 war and connect one to another (like for example with an entry page from the first one to the second one)?
if not what can I do? Am I have to rethink the thing?
thanks a lot!!
Demetrio Filocamo

Swing is a desktop tecnology.
JSF is a Web tecnology.
If the 2 Wars are deployed as two different web sites, then you can do navigation bettween them, like you do on Html.

JSF 1.2 Expert Needed

I�m a Test Development Manager with Brainbench (www.brainbench.com). We are a provider of high-quality, secure, online, certification tests using computer adaptive testing (CAT). We provide skill-based tests that measure a person's core knowledge in a specific field.
We are looking for Java Server Faces (JSF 1.2) test validators. These are Subject Matter Experts (SMEs) in the field of Java Server Faces (JSF 1.2). This is something that you will be paid to do on your own time, but it isn't very time consuming. The validators will go through the outline and the final test, and comment on suitability of questions/levels etc. As I've said, it is not a very time intensive task, only a few hours. Validators will make $300.00 per completed test. You must have access to a web browser in order to Validate. We are always looking for good teams, so once you are in our system there is always the chance that other projects will come up.
I am talking to a number of other qualified candidates about this project, so if you are interested please contact me ASAP. If you know of anyone else who is a Java Server Faces (JSF 1.2) Guru and might also be interested in this opportunity, please pass my name and information to him or her.

I doubt he'll come back 1.5 years later. I'm locking up.

Query regarding Javascript in Visual Web JSF

Hi,
I am learning to use Visual web JSF using IDE Netbeans 6.5. I have a doubt regarding using Javascript in the .jsp file. Whenever I use document.getElementById("component-ID").value, I got an error as "component-ID has no properties". It returns null.
Can any one tell me how to handle getElementId()? Or there are any other way to handle javascript in visual web JSF?
Thanks.

Thanks for the quick reply. I have seen the generated HTML. The component say 'txtPId' is referred as '_form1:txtPId'. So I have tried the following code:
    function setFocusOnFirst() {
                   var xyz = document.getElementById('_form1:txtPId');
                   xyz.focus();
   <webuijsf:button binding="#{Page3.btnClick}" id="btnClick" style="height: 48px; left: 719px; top: 192px; position: absolute; width: 192px"   text="Click" onClick="setFocusOnFirst()"/>But it's not working. Should I do it in this way? Please guide.
Thanks.

DOUBTS FOR MIGRATION FROM 10.1.2 TO 10.1.3

Hi all,
I have done an attempt to migrate a simple web app from 10.1.2 (using UIX technology) to 10.1.3; the migration seem ok, but at run-time appear the error in the browser:
500 Internal Server Error
Cannot get request dispatcher for path /test.uix
I have much doubts if the migration tool works effectively...
Can anyone explain its experience? Can solve my doubts?
Thanks,
Matteo

Matteo,
if you have used some "advanced" UIX features not existing in JSF (like Templates) then all the "migration tool" will do is comment out everything in your page.
Converting from UIX to JSF means basically recreating the UI in JSF by hand.
And yes, Oracle promised to support for UIX in 10.1.3, but in the end they broke that promise.
So if you have UIX running and cannot do the migration to JSF then you will have to stick to 10.1.2. There is no design time for UIX in 10.1.3. People tried to get the runtime at least to work on a 10.1.3 ADF layer and failed.
Sascha

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