You can achieve this by creating a custom tag extending <f:viewParam> wherein you store the submitted value as an instance variable which isn’t stored in JSF view state instead of in the JSF view state as the <f:viewParam> by default does. By end of request, all UI component instances are destroyed. They are recreated in … Read more
The cause of this problem seems to be due to strange behaviour JVisualVM when attached to Glassfish/Payara. The test case used for this question is still extremely useful, however the conclusions concerning Garbage Collection in the original post (and images) were based on JVisualVM, and I have since found they are not valid. Use the … Read more
Using view parameters is the most proper way for your case. You don’t really need to perform a REDIRECT, but a plain GET request: <h:button value=”Go to details” outcome=”carDetails”> <f:param name=”carId” value=”#{currentCar.id}” /> </h:button> This will point you to this address: carDetails.xhtml?carId=1 After that, in your carDetails.xhtml page, grab the view param and load the … Read more
Make use of File#createTempFile() facility. The servletcontainer-managed temporary folder is available as application scoped attribute with ServletContext.TEMPDIR as key. String tempDir = (String) externalContext.getApplicationMap().get(ServletContext.TEMPDIR); File tempPdfFile = File.createTempFile(“generated-“, “.pdf”, tempDir); // Write to it. Then just pass the autogenerated file name around to the one responsible for serving it. E.g. String tempPdfFileName = tempPdfFile.getName(); // … Read more
This problem can happen when the list behind #{bean.list} is not exactly the same during the HTTP request of processing the form submit as it was during the request of displaying the form. JSF will namely re-iterate over the list to locate the button pressed and invoke its action. If the bean is request scoped … Read more
This is a documentary bug in JSF. The actual attribute is named itemEscaped, not escapeItem (as incorrectly documented in VDL) or escape (which Eclipse autocomplete indeed autosuggests for some unknown reason, but is actually totally absent in VDL). The following construct should work for you (at least, it does for me on Mojarra 2.1.17): <h:selectOneRadio> … Read more
Your initial <renderer> declaration looks fine, so I tried it here. package com.myapp; import java.io.IOException; import javax.faces.component.UIComponent; import javax.faces.context.FacesContext; import com.sun.faces.renderkit.html_basic.CheckboxRenderer; public class CustomCheckboxRenderer extends CheckboxRenderer { public CustomCheckboxRenderer() { System.out.println(“CustomCheckboxRenderer <init>”); } @Override public void decode(FacesContext context, UIComponent component) { System.out.println(“CustomCheckboxRenderer decode()”); super.decode(context, component); } @Override public void encodeBegin(FacesContext context, UIComponent component) throws IOException … Read more
The <h:head> is a JSF component which provides a hook to programmatically include JavaScript and CSS resources in the generated HTML <head>. PrimeFaces uses it to include the necessary JS/CSS code for the Ajax works and fancy look’n’feel. As a test, create a page with a <h:head> and a PrimeFaces component, open the page in … Read more
I’m not sure why you got the item label instead of the item value inside getAsObject(). Perhaps your getAsString() is doing it wrong and it is returning student name based on the student ID. At any way, I can tell that your itemValue is definitely not right. <h:selectOneMenu id=”studlist” value=”#{studBean.selectedStudent}”> <f:selectItems value=”#{studBean.student}” var=”s” itemValue=”#{s.studid}” itemLabel=”#{s.name}” … Read more
If your sole reason is to get rid of the .xhtml extension, then there are various ways depending on the JSF version you’re using. Faces 4.0 Just add the following context parameter to web.xml: <context-param> <param-name>jakarta.faces.AUTOMATIC_EXTENSIONLESS_MAPPING</param-name> <param-value>true</param-value> </context-param> JSF 2.3+ JSF 2.3 offers a new API to collect all views: the ViewHandler#getViews(). Combine this with … Read more