Back to life – Michael's blog

Ok, I not only survived a horrible breakdown. I need to be a bit patient and hopefully I’ll be fully restored. Time to talk about life cycle. Lifecycle of JSF. Not a full-fledged article yet, but a tutorial to find out by yourself.

Like before, I use NetBeans for explanation. Create a new web application an. Tag “Enable Context and Dependency Injection”. Choose JSF as framework with an extension of “*.xhtml” for URL pattern. This has been a very short explanation. For details and sreenshots refer to Part II of my JSF tutorial.

Complete the generated index.xhtlm:

<?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:f="http://java.sun.com/jsf/core">
       <f:metadata>
               <f:phaseListener type="demo.LifeCycleListener"/>
       </f:metadata>

       <h:head>
               <title>Facelet Title</title>
       </h:head>
       <h:body>
               Hello from Facelets

               <h:form id="form">
                       <p>
                               <h:outputLabel for="name" value="Name:"/>
                               <h:inputText id="name" value="#{backingBean.name}"/>
                       </p>
                       <p>
                               <h:outputLabel for="age" value="Age:"/>
                               <h:inputText id="age" value="#{backingBean.age}"/>
                       </p>
                       <p>
                               <h:commandButton value="Ok"/>
                       </p>
               </h:form>
       </h:body>
</html>

Create a package and name it “demo”.

Create “JSF managed bean” and provide a name of “BackingBean”. Indeed, because you’ve enabled CDI, it will be a named bean. Or just create java class and extend it’s code to become a named bean.

package demo;

import javax.enterprise.context.RequestScoped;
import javax.inject.Named;

@Named
@RequestScoped
public class BackingBean {

       private String _name;
       private int _age;

       public String getName() {
               return _name;
       }

       public void setName(String name) {
               this._name = name;
       }

       public int getAge() {
               return _age;
       }

       public void setAge(int age) {
               this._age = age;
       }
}

Add a second bean with name of “LifeCycleListener”.

package demo;

import javax.enterprise.context.Dependent;
import javax.faces.event.PhaseEvent;
import javax.faces.event.PhaseId;
import javax.faces.event.PhaseListener;
import javax.inject.Named;

@Named
@Dependent
public class LifeCycleListener implements PhaseListener {

       @Override
       public void beforePhase(PhaseEvent event) {
               System.out.println("Before phase: " + event.getPhaseId());
       }

       @Override
       public void afterPhase(PhaseEvent event) {
               System.out.println("After phase: " + event.getPhaseId());
       }

       @Override
       public PhaseId getPhaseId() {
               return PhaseId.ANY_PHASE;
       }

}

Start the project and wath the output of the NetBeans output window, tab GlassFish Server. Provide a name and age and click onto [OK]. Use some letters instead of numeric for field age and click [Ok] again. Did you recognize the difference?

I’ll provide detailed explanation when I’ll get time again.

To web development content.

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