What I'm going to describe can be the expected behaviour for people who know the JSF phase cycle well, but it is not obvious for me, so I ask for confirmation.
In a JSF page I put a listener for a prerenderview event.
The page is processed in consequence of a jsf-forward. The listener is not executed.
If I access the page directly through its url (perfroming a GET) the listener is executed.
Is there something wrong with my code or is this the right behaviour ?
I searched a lot on internet but didn't find anything useful.
Update
As I stated in the comments I jumped to wrong conclusion. What I described is not a general behaviour but a special case due to bugs or a more complex scenario.
Update 2
After further investigation I came to this conclusion: the problem seems to be related to a wrong way to put the preRenderView listener in a page which uses templates. Unfortunately it works in some circumstances and not in others.
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org /TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:p="http://primefaces.prime.com.tr/ui">
<f:metadata>
<f:event listener="#{permessitemporaneiController.preCreate}" type="preRenderView" />
</f:metadata>
<ui:composition template="/template.xhtml">
...
I should have created an insert area inside the template and put the tag inside a in the previous code.
The weird thing is that with the 'wrong' code the listener is correctly called with GET requests, but doesn't work with a jsf-forward. Why ??
Thanks
Filippo
Related
I have a problem with the JSF 2.2 Feature <f:viewAction action="#{...}/>.
I placed this tag in my XHTML-Page, it's called viewActionStart.xhtml:
<?xml version="1.0" encoding="UTF-8"?>
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:p="http://primefaces.org/ui">
<h:head />
<h:body>
<f:view>
<f:metadata>
<f:viewAction action="#{redirect.getView()}" onPostback="true"
immediate="true" />
</f:metadata>
</f:view>
<h:outputText value="If you see that text, the viewAction was not performed." />
</h:body>
</html>
If I visit this XHTML-Page directly, everything works fine: The method redirect.getView() is called and a redirect to another page is performed.
Now I have my landing page, that is shown before that viewActionStart-Page. There is a button, that basically should navigate to my viewActionStart-Page to show the <f:viewAction> effect. The following code is from this landing page index.xhtml:
<?xml version="1.0" encoding="UTF-8"?>
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:p="http://primefaces.org/ui">
<h:head>
</h:head>
<h:body>
<f:view>
<h:form>
<h:commandButton action="viewActionStart.xhtml"
value="To f:viewAction Page" />
</h:form>
</f:view>
</h:body>
</html>
If I hit that command button, the content of the viewActionStart.xhtml is shown. Why does JSF ignore the <f:viewAction>? I do not understand why the viewAction does not work on every page load. I tried around with those onPostback and "immediate" attributes, but nothing changes.
Another weird result is, that after I hit the command button and see the content of viewActionStart.xhtml the URL still remains on localhost:8080/UIIncludeTest/index.xhtml. But shouldn't look this URL like localhost:8080/UIIncludeTest/viewActionStart.xhtml after the command button does navigation?
Am I doing something wrong? Or do I simply misunderstood <f:viewAction>? The weird thing, is, that it works if I browse directly to viewActionStart.xhtml.
I'm trying to get this working on:
JSF-2.2.6
Tomcat-7.0.47
PrimeFaces 5.0
I have read the numerous posts related to <f:viewAction> but nothing helped.
The <f:viewAction onPostback="true"> applies only on postbacks on the very same view. I.e. it runs only when a <h:form> in the very same view has been submitted. The <f:viewAction> is never intented to be executed upon POST navigation triggered by a submit of a <h:form> of another view. Moreover, the term "postback" in the attribute name also confirms this. This term means in web development world "a POST request on the URL of the page itself".
You need to open it by a GET request instead of a POST request. Replace the <h:commandButton> by <h:button>:
<h:button outcome="viewActionStart.xhtml" value="To f:viewAction Page" />
(note: the <h:form> is not necessary anymore)
Or, if you really intend to perform a POST request first for some unclear reason (it would have been a bit more understandable if you were invoking a bean action method, but you're here merely navigating, so the whole POST request doesn't make any sense), then let it send a redirect:
<h:commandButton action="viewActionStart.xhtml?faces-redirect-true" value="To f:viewAction Page" />
Either way, the URL should now be properly reflected in address bar. This was at its own indeed a strong hint that you was donig things the wrong way ;)
See also:
How to navigate in JSF? How to make URL reflect current page (and not previous one)
Difference between h:button and h:commandButton
I'd like to build VXML using JSF2.0 but I didn't find any supporting tags. What we've proposed is writing xhtml pages with vxml data (having references to backing bean where ever value needs to get replaced) by having content type as 'text/xml' so client can read the xml directly.
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:ui="http://java.sun.com/jsf/facelets">
<f:view contentType="text/xml">
<vxml>
<log>Caught the event </log>
<prompt bargein="true">
<audio src="built-in: #{myBackingBean.prompt}" />
</prompt>
</vxml>
</f:view>
</html>
But when ever I try to launch above xhtml page in a browser or using a REST webservice client -
1) I'm not seeing xml returned. But just Caught the event as output in browser. REST client is not seeing any output.
2) myBackingBean.prompt value is not getting replaced
Can any one suggest please? We do not want to use plain old servlets to construct the xml. We'd like to write XML manually but need values to be replaced from backing bean.
I have a problem with the JSF 2.2 Feature <f:viewAction action="#{...}/>.
I placed this tag in my XHTML-Page, it's called viewActionStart.xhtml:
<?xml version="1.0" encoding="UTF-8"?>
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:p="http://primefaces.org/ui">
<h:head />
<h:body>
<f:view>
<f:metadata>
<f:viewAction action="#{redirect.getView()}" onPostback="true"
immediate="true" />
</f:metadata>
</f:view>
<h:outputText value="If you see that text, the viewAction was not performed." />
</h:body>
</html>
If I visit this XHTML-Page directly, everything works fine: The method redirect.getView() is called and a redirect to another page is performed.
Now I have my landing page, that is shown before that viewActionStart-Page. There is a button, that basically should navigate to my viewActionStart-Page to show the <f:viewAction> effect. The following code is from this landing page index.xhtml:
<?xml version="1.0" encoding="UTF-8"?>
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:p="http://primefaces.org/ui">
<h:head>
</h:head>
<h:body>
<f:view>
<h:form>
<h:commandButton action="viewActionStart.xhtml"
value="To f:viewAction Page" />
</h:form>
</f:view>
</h:body>
</html>
If I hit that command button, the content of the viewActionStart.xhtml is shown. Why does JSF ignore the <f:viewAction>? I do not understand why the viewAction does not work on every page load. I tried around with those onPostback and "immediate" attributes, but nothing changes.
Another weird result is, that after I hit the command button and see the content of viewActionStart.xhtml the URL still remains on localhost:8080/UIIncludeTest/index.xhtml. But shouldn't look this URL like localhost:8080/UIIncludeTest/viewActionStart.xhtml after the command button does navigation?
Am I doing something wrong? Or do I simply misunderstood <f:viewAction>? The weird thing, is, that it works if I browse directly to viewActionStart.xhtml.
I'm trying to get this working on:
JSF-2.2.6
Tomcat-7.0.47
PrimeFaces 5.0
I have read the numerous posts related to <f:viewAction> but nothing helped.
The <f:viewAction onPostback="true"> applies only on postbacks on the very same view. I.e. it runs only when a <h:form> in the very same view has been submitted. The <f:viewAction> is never intented to be executed upon POST navigation triggered by a submit of a <h:form> of another view. Moreover, the term "postback" in the attribute name also confirms this. This term means in web development world "a POST request on the URL of the page itself".
You need to open it by a GET request instead of a POST request. Replace the <h:commandButton> by <h:button>:
<h:button outcome="viewActionStart.xhtml" value="To f:viewAction Page" />
(note: the <h:form> is not necessary anymore)
Or, if you really intend to perform a POST request first for some unclear reason (it would have been a bit more understandable if you were invoking a bean action method, but you're here merely navigating, so the whole POST request doesn't make any sense), then let it send a redirect:
<h:commandButton action="viewActionStart.xhtml?faces-redirect-true" value="To f:viewAction Page" />
Either way, the URL should now be properly reflected in address bar. This was at its own indeed a strong hint that you was donig things the wrong way ;)
See also:
How to navigate in JSF? How to make URL reflect current page (and not previous one)
Difference between h:button and h:commandButton
Hi i have this demo form with RF 4.5.2, the oncomplete execute 3 times, i need a way to execute a method after the ajax call but only one time, i think that is the behaviour of the oncomplete but if it doesnt you can suggest any other ideas to accomplish this:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:a4j="http://richfaces.org/a4j"
xmlns:rich="http://richfaces.org/rich"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:ui="http://java.sun.com/jsf/facelets">
<h:head></h:head>
<body>
<rich:panel>
<h:form>
<a4j:commandButton id="btnAccion" value="enviar" oncomplete="#{archivoAfipController.emptyAction()}"/>
</h:form>
</rich:panel>
</body>
</html>
You're supposed to use the action attribute for the purpose of invoking a managed bean method on submit.
<a4j:commandButton ... action="#{archivoAfipController.emptyAction}" />
The oncomplete must represent a client side script expression (thus, e.g. JavaScript, which is in JSF perspective basically a plain vanilla String!), which should be executed when the ajax action has completed, the response has returned, and all necessary parts of the view have been updated in the client side.
See also:
<a4j:commandButton> tag documentation
https://stackoverflow.com/a/20146879/ (only second half of the answer is relevant)
I'm using JSF 2.2 in my Project (Tomcat 7.42, Mojarra 2.2.1), and i want to use p:calendar from PrimeFaces library. I have included primefaces-4.0.jar into my Project Libraries, and add xmlns:p="http://primefaces.org/ui" namespace, and everything looks ok. Here is my code:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:p="http://primefaces.org/ui">
<h:body>
<p:calendar value="#{calendarBean.date2}" id="popupCal" />
</h:body>
</html>
But, in browser, calendar doesn't appear. Standard h: components work great, but from PrimeFaces - nothing works.
I know that PF 4.0 should support JSF 2.2, but i have some issue.
I appreciate any help?
In jsf 2.2 namespaces are changed so you shoud use xmlns.jcp.org instead of java.sun.com
I managed to solve the problem! I am really sorry, but a PrimeFaces' "Getting Started" really confused me. The problem is that I had added PrimeFaces as a library into build path of my project, which is not correct. The right way is to put primefaces-4.0.jar into lib folder under web project. Things are better now. Anyway, thanks people.