I have a variable in backing bean that needs to get reset to null whenever the associated page is opened using the relevant menu link. Is there a way to run a initialization code in the backing bean whenever the relevant menu link is clicked? Contsructor runs only the first time the menu link is clicked. I guess the bean is then retained in the jsf context and is not getting recreated. Is there a way to ensure a new object of that backing bean is created each time the menu link is clicked? Thanks!
Couldn't you just put the bean in request scope?
Another option would be to use a setpropertyactionlistener on the menu. When the menu is clicked, set the value to "null".
You have the following options:
1 . Change the bean to the request-scoped bean
2 . Use the action attribute to call the method on the backing bean to run the initialization code whenever the link is clicked , something like this:
<h:commandLink action="#{myBean.init}" value="My Link" />
And myBean.init() contains the initialization code
Related
I have some problems with calling a bean method when clicking on Label.
When page is loading or refreshing click handler function pokus() is called, but when the label is clicked it isn't.
Part of my web page:
<h:form id="pokus">
<p:outputLabel id="pokus2" value="klikni" onclick="#pozadavkyBean.pokus(5)}"/>
</h:form>
and a method in bean:
public void pokus(int i){
System.out.printf("kliknuto sloupec:%d",i);
}
I've also tried it with:
<p:ajax event="click" listener="....
with the same result - method called on loading/refreshing but not when clicking
also tried others events: mousedown, mouseup, .... with same result
using PrimeFaces 5.0
If you will check official document of Primeface regarding Tag outputLabel.You can easily get attribute onclick used for
Client side callback to execute when component is clicked.
But here you are trying to run Managed bean method directly from onclick attribute while onclick used to call JavaScript functions.
As #Mahendran Ayyarsamy Kandiar mentioned and its simple thing outputLabel is not used to call any bean method. Its Just Simply used to show something in the page.In mean time for your requirement you can use CommandButton,CommandLink or some other component but its all depend upon your requirment etc.
I have a view scoped bean that has a method call generateLicenseFile.
The method returns a String with this value
/licenseGenerated.xhtml?faces-redirect=true"
The JSF code for the page (agreementDetail.xhtml) looks like this
<h:commandButton value="Generate License File" action="#{agreement.generateLicenseFile}" />
When I click the button, I get an error
javax.servlet.ServletException: /agreementDetail.xhtmlNo saved view state could be found for the view identifier: /agreementDetail.xhtml
Any ideas?
--EDIT--
Just FYI, the "generateLicenseFile" method is not even executed, since I have logging that proves this.
No Saved View generally occurs when something goes wrong in the JSF Servlet life cycle.Maybe it's because of the View Scoped Bean.Try to change it to Session Scoped and make sure your managed bean entry is there in the faces-config.xml.
Another suggestion is in the generateLicenseFile method in the agreement bean return a String as "someStringName" and make sure you create a navigation handler in Faces Config with navigation rule and navigation case.
I have a problem that i don't understand:
I request a new site. A site has a link that opens a dialog. The link is inside a form.
The dialog is not inside the form.
A reduced code example:
<p:outputPanel id="layout-center" >
<h:form>
<p:commandLink id="option_field_user_profile" actionListener="#{controllerBean.getBean('userProfileBean', component).init}" oncomplete="#{controllerBean.getBean('userProfileBean', component).show}" >
<h:outputText value="#{msg.mProfile}"/>
</p:commandLink>
</h:form>
</p:outputPanel>
<p:dialog header="#{userPreferencesBean.header}" widgetVar="#{userPreferencesBean.widgetVar}" appendToBody="#{userPreferencesBean.appendToBody}" resizable="#{userPreferencesBean.resizable}" id="#{userPreferencesBean.xhtmlId}" dynamic="#{userPreferencesBean.dynamic}" modal="#{userPreferencesBean.modal}" closable="#{userPreferenceBean.closable}">
<ui:include src="/WEB-INF/templates/modification/userPreferences.xhtml" />
</p:dialog>
UserPreferencesBean is in ViewScope. My problem is now that the #PostConstruct method from the UserPreferencesBean is called twice with the non-postback request i.e. the Bean is constructed twice although it should be the same view. If i move the dialog inside the form for testing purposes it is called once, like expected. But since the dialog has its own form this is not a solution, for sure.
When the site is loaded and I hit F5, the PostConstruct method is executed once.
Has somebody an idea?
This is caused because you referenced a view scoped bean property in the view build time attribute id of the <p:dialog>. If you fix the id to be static, or to reference a request or application scoped bean property instead, then your view scoped bean will behave as expected.
See also:
JSTL in JSF2 Facelets... makes sense? - for some background explanation on view build time and view render time; the id and binding attributes of UI components are evaluated during view build time.
I have a jsf page which has a selection popup. User can select the members from this popup and click on 'Add'. After that, the selected members will be displayed on main page. This popuup is opened and closed through javascript and page doesn't refresh in this process.
Now the question is how can I take these selected members up-to backing bean? can I attach them to backing bean property directly?
I am new to JSF framework and Facelets as view, I am stuck with a problem now. I have got a page where i show some dropdown menu using <h:selectOneMenu> tag. On each selection i used to fire an ajax event using <f:ajax> event it all are working fine. But my problem is, if i select an option 2 on a select box and if I reloads the page again that particular select box will be selected with option 2 by default. I dont need this. I have to reload the select boxes along with page refresh. Please help me to solve this issue.
The selectbox shows the option that is set in the backing bean (and bound by the value attribute of <h:selectOneMenu>). The behavior after a page refresh depends on the scope of your backing bean. If it is session scoped, a page refresh doesn't reset the bean. You could change the scope to #ViewScoped to get the desired behavior. The bean then will be recreated after a full request.
Just set null to backing bean property that used in selectonemenu value after the selected action or set default value in property get method.