ViewScope Bean Contructor Multiple Call

Question

Below I have 2 buttons "Get Players In Same View", one is JSF button, non-ajax and the other is primefaces button with AJAX update. The backend bean "playersBean" is view scope. Both the buttons call method newPlayer which adds a string value to players list.

When I call the JSF button, the method works fine and the datatable list is updated and then after I reload the page like by using f5 key, playersBean is not reinitialized but the newPlayer method gets called.

When I call the primefaces button, the AJAX works fine and the list is updated. Now after that, when I reload the page, the playersBean is initialized again. How can I prevent from initializing the bean on every reload if i use AJAX update? How can I avoid method call on reload and if i use JSF non ajax button ?

index.xhtml

<html xmlns="http://www.w3.org/1999/xhtml"
      xmlns:h="http://java.sun.com/jsf/html"
      xmlns:p="http://primefaces.org/ui">
    <h:head>
        <title>TODO supply a title</title>
        <meta name="viewport" content="width=device-width, initial-scale=1.0"/>
    </h:head>
    <h:body>
        <h:form>
            Just generated:
            <h:outputText value="#{playersBean.player}"/><br/>
            List of generated players:
            <h:dataTable id="dt" var="t" value="#{playersBean.players}">
                <h:column>
                    <h:outputText value="#{t}"/>
                </h:column>
            </h:dataTable>
            <h:commandButton value="Get Players In Same View"
                             actionListener="#{playersBean.newPlayer()}"/>  

            <p:commandButton value="Get Players In Same View" update="dt"
                           action="#{playersBean.newPlayer()}"/>  
        </h:form>
    </h:body>
</html>

PlayersBean.java

@ManagedBean
@ViewScoped
public class PlayersBean implements Serializable {

    final String[] players_list = {"Nadal, Rafael (ESP)", "Djokovic,Novak (SRB)", "Ferrer, David (ESP)", "Murray, Andy (GBR)", "Del Potro, Juan Martin (ARG)"};
    private ArrayList players = new ArrayList();
    private String player;

    public PlayersBean() {
        ExternalContext extCon = FacesContext.getCurrentInstance().getExternalContext();
        HttpSession session = (HttpSession) extCon.getSession(false);

        System.out.println("session: " + session);
        System.out.println("Contructor PlayersBean");
    }

//getters and setters
    public void newPlayer() {
        int nr = new Random().nextInt(4);
        player = players_list[nr];
        players.add(player);
        System.out.println("players: " + players.size());
    }

}

ViewScope Bean Contructor Multiple Call

0 Answers0