What is execution order of backing bean default methods ?

Hi
Thank you for reading my post.
what is execution order of backing bean methods like :
constructor . init , preproccess , prerender .. ?
thanks

Hi
Thank you for reading my post.
what is execution order of backing bean methods like
constructor . init , preproccess , prerender .. ?So far, so good. That is the order. However, preprocess is only called on postback and prerender is only called if the page is going to be rendered.
To learn about these methods and when/how they are called.
http://developers.sun.com/prodtech/javatools/jscreator/reference/fi/2/event-life-cycle.html
http://blogs.sun.com/roller/page/dashboy?entry=java_studio_creator_lifecycle_q1
http://blogs.sun.com/roller/page/divas?entry=about_a_page_s_lifecycle

Similar Messages

Backing Bean Validation Method error

Hi all,
I've an ADF JSF User Registration Form and I want to set my server-side validation to confirm passwords entered by the user using the validator attribute bound to customized validation logic sitting in a method my backing bean. I've tried quite a few cracks at this but I still seem to get a java.lang.NullPointerException error when the method is invoked.
The relevant method in my Backing Bean looks like this:
public void comparePassword(FacesContext facesContext, UIComponent uiComponent, Object newValue) {
//Get the new value that is passed passed from the Confirm Password field
String confirmPassword = (String)newValue;
//Get the password that has already been entered
String password = (String)getLoginPasswordText().getValue();
//Compare passwords and raise validation error message
if (!password.equals(confirmPassword)){
throw new ValidatorException(new FacesMessage
(FacesMessage.SEVERITY_ERROR,
"Passwords need to be the same",
"Password values should be the same"));
The getters and setters for the components are also in the bean and the gettLoginPasswordText() returns the original password input text field (the one that I want to compare it to).
Is there something that I've missed here?
Cheers

Thanks Frank.
I now understand a bit more about value binding. But unfortunately I need a little more help (from anyone) on this one. I've tried quite a few things and I think the problem stems from the fact that the validation code doesn't seem to pickup the value entered in the comparison field - at least in the way that I've coded it. Here's a more complete example of what I'm trying to overcome:
I've got two input text components:
<af:inputText required="true" simple="true"
id="loginPasswordText"
immediate="true"
value="#{backing_UserRegistration.password1}">
</af:inputText>
<af:inputText required="true" simple="true"
id="loginConfirmPasswordText"
immediate="true"
validator="#{backing_UserRegistration.comparePassword}"
value="#{backing_UserRegistration.password2}">
</af:inputText>
I've setup the relevant accessors as in the following:
String password1 = "";
public String getPassword1(){
return password1;
String password2 = "";
public String getPassword2(){
return password2;
And my validation now code looks like this:
public void comparePassword(FacesContext context, UIComponent toValidate, Object value) {
if (!Password2.equals(Password1)) {
FacesMessage msg = new FacesMessage("summary message", " detailed message");
msg.setSeverity(FacesMessage.SEVERITY_INFO);
ValidatorException e = new ValidatorException(msg);
throw e;
I've tested the validation code on a standalone basis ie passing in a new variable as part of the method ie.
String word = (String) value;
if (word.equals("tom"))....
The validator and message fires OK, so I know the problem lies with picking up the entered values for password1 and password2. I know the values are there because I can "see" them on screen and they are recognized by standalone validators and the bean has a session scope.
Ideas anyone?
Thanks

Reset Order By back to default

When the user logs into the application, if he/she reorders her report by a specific field then exits, the application saves the new order by. When he/she logs back in, the report shows the previous order by rather than the system default. I would like it so that the order by always defaults back to what I specified.
Also, is there a way to get multiple order by's? (Like in sql, we can order by 1,2,3...)
Thanks,
Yvette

The multiple order by you can get only if you hardcode it in the SQL.
Denes Kubicek
http://deneskubicek.blogspot.com/
http://www.opal-consulting.de/training
http://htmldb.oracle.com/pls/otn/f?p=31517:1
-------------------------------------------------------------------

Role of backing beans in MVC design

Hello,
yet another JSF/MVC question. In short, I would like to know what the role of the backing beans are in an MVC design with JSF. The most simple answer would be that they are just the Controllers. But that doesn't seem enough.
Suppose I have an application model, call it Ma, which is just an interface that represents a use case in Java. Ma doesn't know anything about a view or controller, it is just domain logic with application-specific state and behavior added. Now,
- my backing bean uses Ma as its Model, acting as a true Controller by delegating requests to it
- my backing bean also adds view-specific state (show/hide stuff and it also returns a List<SelectItem> for example) that I can't put on Ma, so it also acts as a view model Mv
So, I could argue that I have an Mv-V-C design, where the backing bean is both C and Mv. My user interface V only queries Mv for its state.
Usually I read that V and C are considered to be very tightly coupled, so then I would have an Ma-V-C design with the backing bean being C and part of V.
Is it just a question of terminology or point of view, expressing the same idea twice?

The way I think about it is that there are multiple layers of MVC.This kind of refers to my point-of-view question. So let's try two of them.
The view itself can be thought of as containing MVC elements.When only looking at JSF (presentation layer) we have:
- Model: backing beans (view model Mv)
- View: view root and JSPs (query backing beans for state)
- Controller: Faces servlet (dispatches requests to backing beans)
In my "enterprise" quality applications, I will have three distinct layers.Taking a step back, let's look at the application layer (your "control layer", application logic behind interface) and the presentation layer.
Then:
- Model: application model Ma in application layer
- View: backing bean (associated with UI components)
- Controller: backing bean (dispatches requests to Ma)
Agree?
It's interesting that you call my application layer "control layer" since it seems more like a model to me, especiallly when you say:
The control layer consists of business logic interfaces and their implementations.This said, the objects in this application layer do have some controller functionality as they orchestrate the interactions with the underlying domain model, just llike the backing beans do with the application model. So maybe you can take another step back and consider these application logic interfaces as the View and Controller for the underlying domain model. That is: in a layered MVC design every M can become the VC for an underlying (more general) layer?
And I have seen this taken to extremes.Perhaps that's what I'm doing here :)

Modifying where clauses for View Objects in Backing Beans

In studying the RichTable class I saw no get/set methods that would allow me to manipulate the underlying view instance and rowset for the table in the Backing Bean. I know there is a way to do it, but I having great difficulty in finding it. The tutorials show how to build view objects and display them, but I haven't seen a tutorial that show how to respond to events from the Web page and directly change the data model and what is displayed via the backing bean.
Can some one point to a tutorial or give me an example on how I can change a view object via a backing bean?

What you want to do is add a method to your View Object Implementation class that changes the WHERE clause with setWhereClause or addWhereClause. Expose the method to your client. Then call the method from your page by binding it to a commandButton or commandLink. You can bind it through a pageDef file or a backing bean.

About backing bean method's invokation

Hi,
I have a backing bean method binded to a component:
<af:selectOneChoice value="#{bindings.managerId.inputValue}"
label="Manager" valign="middle"
binding="#{backing_searchDocuments.managersList}"
valuePassThru="true" immediate="false"
rendered="#{bindings.ListManagersIterator.estimatedRowCount > 1}">
<f:selectItems value="#{bindings.managerId.items}"/>
When page refreshes component executes his binding method. But in some cases, actually when I press the commandMenuItem leading to the same page where I am it seems that it doesn't get invoked.. how can I manage the invocation of backing bean's methods? I need it invoked every time any request is made.. How to do that?

Mario,
this method is executed when the component re-draws. So anything other than a PPR request makes this binding method being called.
If PPR is used with your commandMenuItem, them make sure the PPR trigger is set to refresh the component.
I don't know what code it is that you need to execute each time, but maybe putting this on a action listener is a better idea
Frank

Backing Bean method not invoked - h:selectOneRadio

Hi,
I am trying to invoke a method in the backing bean when a radio button is selected, but for some reasons the method is not getting invoked, any idea why is it so? copying the code for reference.
I have a command button in this jsp which when clicked is fetching the records(from the backing bean) perfectly and a radio button for each of the record so user can select any one of the records listed.
example.jsp
<%@ page language="java" pageEncoding="ISO-8859-1"%>
<%@ taglib uri="http://java.sun.com/jsf/html" prefix="h" %>
<%@ taglib uri="http://java.sun.com/jsf/core" prefix="f" %>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
     <base href="<%=basePath%>">
     <title>My Page</title>
     <meta http-equiv="pragma" content="no-cache">
     <meta http-equiv="cache-control" content="no-cache">
     <meta http-equiv="expires" content="0">
     <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
     <meta http-equiv="description" content="sample List">
     
     </head>
<body>
     <f:view>
          <h:form id="contacts">
          <table width="200" border="0" title="sample List" style="border-right-style: solid; border-bottom-style: solid; border-left-style: solid; border-top-style: solid" bgcolor="#F0F0F0" cellpadding="2" cellspacing="2">
               <h:outputLabel value="Product List:" style="font-family: Verdana, Arial, Sans-Serif; font-size: 14px; color: Black; font-weight: bold; font-style: normal; width: 198px" styleClass="bigfieldcell"></h:outputLabel>
                      </table>
          <br>
     <div style="height: 400px; overflow: auto">
               <h:dataTable border="1" value="#{contactsBean.contactsList}" var="contact" bgcolor="#EEEEEE" frame="box" styleClass="orderlabelcell" cellpadding="3">
               <h:column>
                         <f:facet name="header">
                              <h:outputText value="Select to Edit"/>
                         </f:facet>
                              *<h:selectOneRadio valueChangeListener="#{contactsBean.test}">*
                *               <f:selectItem itemValue="#{contact}" />*
            *               </h:selectOneRadio>*               </h:column>
                    <h:column>
                         <f:facet name="header">
                              <h:outputText value="Category"/>
                         </f:facet>
                         <h:inputText value="#{contact.category}" style="border-right-style: none; border-bottom-style: none; border-left-style: none; border-top-style: none; border-right-color: #FFFFFF; border-top-color: #FFFFFF"></h:inputText>
                    </h:column>
                    <h:column>
                         <f:facet name="header">
                              <h:outputText value="Location"/>
                         </f:facet>
                         <h:outputText value="#{contact.location}"></h:outputText>
                    </h:column>
                    <h:column>
                         <f:facet name="header">
                              <h:outputText value="Problem Type"/>
                         </f:facet>
                         <h:outputText value="#{contact.problemType}"></h:outputText>
                    </h:column>
                    <h:column>
                         <f:facet name="header">
                              <h:outputText value="Problem Details"/>
                         </f:facet>
                         <h:outputText value="#{contact.problemDetails}"></h:outputText>
                    </h:column>
                    <h:column>
                         <f:facet name="header">
                              <h:outputText value="Contact"/>
                         </f:facet>
                         <h:outputText value="#{contact.contact}"></h:outputText>
                    </h:column>
               </h:dataTable>
               </div>
               </h:form>
          </f:view>
</body>
</html>
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>
<managed-bean>
<managed-bean-name>contactsBean</managed-bean-name>
<managed-bean-class>services.ContactsBean</managed-bean-class>
<managed-bean-scope>request</managed-bean-scope>
</managed-bean>
<managed-bean>
<managed-bean-name>contactsDatabaseHandler</managed-bean-name>
<managed-bean-class>dao.ContactsDatabaseHandler</managed-bean-class>
<managed-bean-scope>session</managed-bean-scope>
</managed-bean>
</faces-config>
ContactsBean.java
package services;
import java.util.ArrayList;
import java.util.Hashtable;
import java.util.List;
import javax.faces.context.FacesContext;
import javax.faces.event.AbortProcessingException;
import javax.faces.event.ValueChangeEvent;
import javax.faces.model.SelectItem;
import sun.security.action.GetLongAction;
import dao.ContactsDatabaseHandler;
import model.Contact;
public class ContactsBean {
     private String selectedLocation;
     private List locationList;
     private String selectedProblemType;
     private List problemTypeList;
     private List contactsList;
     private ContactsDatabaseHandler dbHandler;
     private String address;
     private Hashtable region;
     private Contact selectedContact;
     public void test(ValueChangeEvent event)throws AbortProcessingException {
          System.out.println("In Backing Bean : test method.... ");
}Thanks in Advance

The valueChangeListener runs at the server side. You need to submit the form to the server side to invoke the valueChangeListener. There is no client side magic like Javascript.
To submit the parent form on change of the dropdown, just add the following attribute with a piece of Javascript to the h:selectOneMenu:onchange="this.form.submit()"

How open new browser in JSF after executing backing bean method

hi All,
Can you please tell me how to open a new browser after executing action method in bean.
I have writen one java script function, i am passing the string url which i got from the backing bean action method.
First of all i want to execute action method then only javascript function.
waiting for your quick reply.
thanks & regards
bhushanam.

hi,
That command link in data table. The requirement is like this:
I have datatable, the columns are
1) <h:selectBooleanCheckbox ....
2) <h:commandLink ....
requirement 1:
if user select the boolean check box and click the command link
then I want to execute the backing bean action method , it returns string url and show in new browser window( popup window with toolbar ).
requirement 2:
if user not select the boolean check box and click the command link then I want to excute the backing bean action method, it returns string url and show in the same browser ( through navigation rule we can show that page.)
Please look the below command link code.......
<h:commandLink id="belegnr" onmousedown="return showPopupWindowForInvoiceForGraphicImage( '#{row.importKz}', '#{row.blnChecked}', '#{InvoiceMecBoxBean.printInvoiceFilePath}');" styleClass="input" style="color:blue" value="#{row.belegnr}" action="#{InvoiceMecBoxBean.editLinkAction}"/>
Can u please give me the idea istead of command link can we use outputlink to fullfil the requirement?. Or any suggestion please......
Here in my case commandlink value is differenet and after action the return value is different to show in new window. that is problem here.
thanks & regards
bhushanam.

TP4 / AF:REGION / What is the way to work with af:region and Backing Beans?

Hello,
I would be able to use the "af:region" component with a Backing Bean, but all examples I can found googling are with pageDef.
So, I have been trying with different classes the way to solve this problem and I arrive to this:
oracle.adf.controller.internal.binding.TaskFlowRegionModel
Some code:
task-flow-definition.xml
<?xml version="1.0" encoding="windows-1252" ?>
<adfc-config xmlns="http://xmlns.oracle.com/adf/controller" version="1.2">
<task-flow-definition id="taskDestinationA">
    <default-activity>destinationA</default-activity>
    <view id="destinationA">
      <page>/regionDestinationA.jsff</page>
    </view>
    <use-page-fragments/>
</task-flow-definition>
</adfc-config>
adfc-config.xml
<?xml version="1.0" encoding="windows-1252" ?>
<adfc-config xmlns="http://xmlns.oracle.com/adf/controller" version="1.2">
<managed-bean>
    <managed-bean-name>backing_regionTest</managed-bean-name>
    <managed-bean-class>backing.RegionTest</managed-bean-class>
    <managed-bean-scope>request</managed-bean-scope>
    
</managed-bean>
</adfc-config>
regionTest.jspx
<?xml version='1.0' encoding='windows-1252'?>
<jsp:root xmlns:jsp="http://java.sun.com/JSP/Page" version="2.0"
          xmlns:f="http://java.sun.com/jsf/core"
          xmlns:af="http://xmlns.oracle.com/adf/faces/rich">
<jsp:directive.page contentType="text/html;charset=windows-1252"/>
<f:view>
<af:document binding="#{backing_regionTest.document1}" id="document1">
<af:form binding="#{backing_regionTest.form1}" id="form1">
    <af:region binding="#{backing_regionTest.region1}" id="region1"
               value="#{backing_regionTest.regionModel}"/>
</af:form>
</af:document>
</f:view>

</jsp:root>
RegionTest.java
import oracle.adf.controller.internal.binding.DCTaskFlowBinding;
import oracle.adf.controller.internal.binding.TaskFlowRegionModel;
import oracle.adf.view.rich.component.rich.RichDocument;
import oracle.adf.view.rich.component.rich.RichForm;
import oracle.adf.view.rich.component.rich.fragment.RichRegion;
import oracle.adf.view.rich.model.RegionModel;
public class RegionTest {
    private RichForm form1;
    private RichDocument document1;
    private RichRegion region1;
    private RegionModel regionModel;
    public RegionTest () {
        /*Here I try to put the same values as the constructor of TaskFlowId*/
        /*THERE IS NO DOCUMENTATION ANYWHERE :P*/
        DCTaskFlowBinding dctfb = TaskFlowRegionModel.getCurrentTaskFlowBinding("/WEB-INF/task-flow-definition.xml","taskDestinationA");
        //And here, dctfb is always NULL.
        /*I try removing the '.xml' extension of the name, but still not works*/
        //Fill the value of regionModel
        this.regionModel = new TaskFlowRegionModel(dctfb);
        /*Perhaps is better create a method to acquire the value,
          but I try in constructor first*/
    public void setForm1(RichForm form1) { this.form1 = form1; }
    public RichForm getForm1() { return form1; }
    public void setDocument1(RichDocument document1) { this.document1 = document1; }
    public RichDocument getDocument1() { return document1; }
    public void setRegion1(RichRegion region1) { this.region1 = region1; }
    public RichRegion getRegion1() { return region1; }
    public void setRegionModel(RegionModel regionModel) { this.regionModel = regionModel; }
    public RegionModel getRegionModel() { return regionModel; }
regionDestinationA.jsff
<?xml version='1.0' encoding='windows-1252'?>
<jsp:root xmlns:jsp="http://java.sun.com/JSP/Page" version="2.0"
          xmlns:af="http://xmlns.oracle.com/adf/faces/rich">
<af:outputText value="Hello World!"/>
</jsp:root>So, my problem is in Backing Bean class (RegionTest.java). I don't know how I can acquire 'DCTaskFlowBinding' instance value; well, I don't know if that is the way to acquire the value of TaskFlowRegionModel, and even I don't know if this is the way to set the value of RegionModel. I don't know all of this because there isn't documentation yet :P
Some oracle-java-guru can help me, please?
JVN
PD: Environment: JDev TP4.

Hi,
your biggest problem is the use of internal classes that probably will change without further notice and lead to a broken application then
I don't think that the region model is supposed to work without ADF binding in this release. If you need a page region then the Trinidad region should be helpful (though it doesn't support you with navigation cases as the taskflow does)
I'l check internally if there is an option to do what you are trying to do. However, as mentioned, if you need to use internal classes then the answer probably is no.
Frank

What is difference between Managed Bean and Backing Bean?

What is difference between Managed Bean and Backing Bean? Please guide me how to create them and when to use them?
Please post sample for both beans.

Hi,
managed beans and backing beans are quite the same in that the Java object is managed by the JavaServer Faces framework. Manage in this respect means instantiation. The difference is that backing beans contain component "binding" references, which managed beans usually don't. Do backing beans are page specific versions of managed beans.
Managed beans are configured either in the faces-config.xml file, or using ADF Faces and ADFc, in the adfc-config.xml file
Frank
Edited by: Frank Nimphius on Jan 31, 2011 8:49 AM

What files can delete from my imac in order to back up my ipad to my computer.

What files can delete from my imac in order to back up my ipad to my computer.

If it is a matter of storage space, any files you no longer need or can move off to an external drive. If that isn't what you mean, you might want to post some additional details.

What is the order of execution of global transfer routine where multiple routines are involved?

Hi,
Suppose we have start routine, transformation routines and end routine defined between datasource and data target, and also we have a global transfer routine created on an infoobject.
What is the order of execution of routines in this scenerio?
Also if conversion routine like ALPHA is defined for an Infoobject, when does this come into flow.?
Please enlighten me.
Thanks,
Akshara

Hello Akshara ,
The sequence of routines are as
1. Start Routine
2. Master Data Look Up or
3. Field Level Routine
4. End Rountine
Apart from this , there is Expert routine, which is used in special cases, when there are not the sufficient functions to perform a transformation. It can be used as a interim solution , and it performs all the functions of Start routine, end routine , field routine.
Note : if you have created transformation, and then created Expert routine, then system will delete all the existing transformations.
Further to this, you can explore more, by debug the transformation as suggested by Vijay Kumar.
Hope this helps !
Regards
YN

What is the different type mapping faster execution order ?

Order is XSLT, JAVA(SAX), JAVA(DOM), Graphical(sax), and ABAP mappings ?
Is there any Graphical mapping with dom parser ?
Please send the faster execution order .

Hi,
I am not getting exactly what you are looking for,
I think I already had answered your questions in your previous blog
Mapping types performance
Is there any Graphical mapping with dom parser ?
-->Graphical mapping with DOM parser is not possible, thus you have to go for Java Mapping
JAVA mapping
/people/amjad-ali.khoja/blog/2006/02/07/using-dom4j-in-xi--a-more-sophisticated-option-for-xml-processing-than-sap-xml-toolkit
Mapping Techniques
Please let me know if any specific thing that you will be looking for, so accordingly we could narrow down the analysis and answers.
Thanks
Swarup

My computer is part of the iMac 1TB Seagate Hard Drive replacement program. What is the best external modem to use in order to back up my files prior to me dropping off my computer.

My computer is part of the iMac 1TB Seagate Hard Drive replacement program. What is the best external modem to use in order to back up my files prior to me dropping off my computer.

As Babowa says, get an external disk. You should have one for normal backups anyway.
Actually, I'm a strong fan of having multiple backups. 3 copies including the original, 2 different backup formats, and 1 backup off-site.
And when you have your iMac in for service, if you have just 1 backup at that point in time you have just 1 copy of your data. I get paranoid about my data.
But if you are just making 1 backup, I would use SuperDuper (free for a full clone, and extremely good software, as is Carbon Copy Cloner, but it is not free anymore).
And then I would "Boot" from the clone, to make sure it was a good clone.
Booted from the clone, I would then use Applications -> Utilities -> Disk Utility to zero the original disk, as suggested by Babowa, so that when they replace the disk, the original disk containing your data is not in the hands of strangers. A single pass of zeros is more than good enough as an erase, as the chances are no one is going to spend the money needed to try and read the erased data. It is not like you have any super secret data, just stuff you do not want the casual data theif to get. You will find the zeroing options under Disk Utility -> Erase -> Security Options
Just make sure you actually boot from your clone before erasing your original. And if you are paranoid like me, make 2 backups, then erase the original :-)

What is the best way to submit an ADF Faces form from a backing bean?

I would like to submit a JSF form at the end of a backing bean method (actually a ReturnEvent), and wonder if someone could supply an example of the "best practices" approach.
Thanks!!
Jeffrey

Thanks for the reply Frank!
Actually, what I want would be the equivalent of a resetActionListener.
After performing "bindings.getOperationBinding("DeleteTrip").execute()" I would like the page to redraw itself with empty controls.
I have included a resetActionListener in my commandLink, but the page is not redrawn after the operation.
If I hit the reload button on my browser (after the operation has completed), I get the desired behavior.
I've just added this comment to someone else's question you replied to on the following thread:
Re: How to programatically resetAction after rollback?
Thanks again!!
Jeffrey

What is execution order of backing bean default methods ?

Similar Messages

Maybe you are looking for