3 Replies Latest reply on Dec 8, 2015 4:05 AM by mvitorovic

    Getting the same managed bean in the same page

    mvitorovic
    mvitorovic Dec 7, 2015 4:54 AM

      Imagine I have two managed beans, both of them are @ViewScoped

       

      package test.app;

import java.io.Serializable;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.ViewScoped;

@ManagedBean(name = "randomData")
@ViewScoped
public class RandomData implements Serializable {
    private String randomUniqueData = String.format("%X", System.nanoTime());

    public RandomData() {}

    public String getRandomUniqueData() {
        return randomUniqueData;
    }
}

       

      and

       

      package test.app;

import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;

import javax.faces.bean.ManagedBean;
import javax.faces.bean.ViewScoped;
import javax.inject.Inject;

@ManagedBean(name = "personUi")
@ViewScoped
public class PersonUi implements Serializable {
    @Inject private RandomData randomData;

  public String getInjectedRandomData() {
     return randomData.getRandomUniqueData();
  }
}

       

      And a web page:

       

      <?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"
  xmlns:ui="http://java.sun.com/jsf/facelets"
  xmlns:p="http://primefaces.org/ui">

<h:head>
</h:head>
<h:body>
  <h1>Hello World !</h1>
  <h:form>

        <h:outputText value="#{personUi.injectedRandomData}" /> ?= <h:outputText value="#{randomData.randomUniqueData}" />


  </h:form>

</h:body>
</html>

       

      How can I make the two managed beans one and the same? Explicitly, why is the managed bean accessed from the page directly a different one that a managed bean injected into PersonUI.

       

      I am doing this on Wildfly 8.2.

       

      Thanks in advance and br, Miha

        • 1. Re: Getting the same managed bean in the same page
          ctomc
          ctomc Dec 7, 2015 10:16 AM (in response to mvitorovic)

          my guess would be as you are mixing jsf and cdi injection and each one has its own lifecycle.

           

          try using @javax.inject.Named("personUi") instead of @ManagedBean(name = "personUi") 

          and same for randomData class.

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          • 2. Re: Getting the same managed bean in the same page
            mvitorovic
            mvitorovic Dec 8, 2015 2:10 AM (in response to ctomc)

            Thanks for your answer, but that didn't work. But during testing this approach a searched for a solution again, and this time I must have hit the correct search term, because I found the solution:

             

            Injecting Managed beans in JSF 2.0

             

            Works like a charm!

             

            Thanks again, your answer put me on the right track.

             

            Miha

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            • 3. Re: Getting the same managed bean in the same page
              mvitorovic
              mvitorovic Dec 8, 2015 4:05 AM (in response to ctomc)

              Tomaz Cerar wrote:

               

              my guess would be as you are mixing jsf and cdi injection and each one has its own lifecycle.

               

              try using @javax.inject.Named("personUi") instead of @ManagedBean(name = "personUi")

              and same for randomData class.

              Also, I did managed to make it work as you suggested as well (previously I had my pom.xml misconfigured). After switching javaee-api to 7.0 this works as well:

               

              import javax.faces.view.ViewScoped;
import javax.inject.Named;

@Named("randomData")
@ViewScoped
public class RandomData implements Serializable {

               

              and

               

              import javax.faces.view.ViewScoped;
import javax.inject.Inject;
import javax.inject.Named;

@Named("personUi")
@ViewScoped
public class PersonUi implements Serializable {
    @Inject private RandomData randomData;

               

              Thanks again, miha

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