13 Replies Latest reply on Feb 21, 2012 12:39 PM by buraq

    CDI Push NullPointerException while Injecting pushEvent

    buraq
    buraq Jan 31, 2012 7:12 PM

      Hi,

      I'm trying to get a4j:push working with CDI events on 4.1.0.Final.

      My environment;

       

      Netbeans 7.0.1

      Tomcat 7.0.14.0

      Mojarra 2.0.2

      RichFaces 4.1.0

      PrimeFaces 2.2.1

       

      web.xml

      <?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
    <context-param>
        <param-name>javax.faces.FACELETS_SKIP_COMMENTS</param-name>
        <param-value>true</param-value>
    </context-param>

    <context-param>
        <param-name>org.richfaces.push.jms.disable</param-name>
        <param-value>true</param-value>
    </context-param>

    <filter>
        <filter-name>PushFilter</filter-name>
        <filter-class>org.richfaces.webapp.PushFilter</filter-class>
    </filter>

    <filter-mapping>
        <filter-name>PushFilter</filter-name>
        <servlet-name>Faces Servlet</servlet-name>
    </filter-mapping>

    <context-param>
        <param-name>com.sun.faces.expressionFactory</param-name>
        <param-value>org.jboss.el.ExpressionFactoryImpl</param-value>
    </context-param>

    <listener>
        <listener-class>com.sun.xml.ws.transport.http.servlet.WSServletContextListener</listener-class>
    </listener>

    <servlet>
        <servlet-name>Faces Servlet</servlet-name>
        <servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
        <load-on-startup>1</load-on-startup>
    </servlet>

    <servlet-mapping>
        <servlet-name>Faces Servlet</servlet-name>
        <url-pattern>*.jsf</url-pattern>
        <url-pattern>*.xhtml</url-pattern>
        <url-pattern>*.go</url-pattern>
    </servlet-mapping>

    <session-config>
        <session-timeout>
            30
        </session-timeout>
    </session-config>

    <welcome-file-list>
        <welcome-file>login.xhtml</welcome-file>
    </welcome-file-list>

    <error-page>
        <exception-type>javax.faces.application.ViewExpiredException</exception-type>
        <location>/login.xhtml</location>
    </error-page>
</web-app>

       

       

      producer.xhtml

       

      <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<ui:composition xmlns="http://www.w3.org/1999/xhtml"
                xmlns:h="http://java.sun.com/jsf/html"
                xmlns:ui="http://java.sun.com/jsf/facelets"
                xmlns:f="http://java.sun.com/jsf/core"
                xmlns:p="http://primefaces.prime.com.tr/ui"
                xmlns:fn="http://java.sun.com/jsp/jstl/functions"
                template="menu.xhtml">

    <ui:define name="pageContent">
        <f:view contentType="text/html" >

            <br/>
            <h:form id="mf" prependId="false">
                <p:panel>                    
                    <p:commandButton value="PUSH" actionListener="#{myManagedBean.push}"/>
                </p:panel>
            </h:form>
        </f:view>
    </ui:define>
</ui:composition>

       

      consumer.xhtml

       

      <a4j:push address="#{myManagedBean.userIdentifier}@pushCdi"
                ondataavailable="jQuery('&lt;li /&gt;').prependTo('#messages').text(event.rf.data)" /> 
 <ul id="messages" />

       

      MyManagedBean.java

       

      import javax.annotation.PostConstruct;
import javax.faces.bean.ViewScoped;
import javax.enterprise.event.Event;
import javax.faces.bean.ManagedBean;
import javax.faces.context.FacesContext;
import javax.inject.Inject;
import org.richfaces.cdi.push.Push;


@ManagedBean
@ViewScoped
public class MyManagedBean extends BaseBean implements java.io.Serializable{

     private static final long serialVersionUID = 1L;
    public static final String PUSH_CDI_TOPIC = "pushCdi";

    private String userIdentifier;
    private String message;

    @Inject
    @Push(topic = PUSH_CDI_TOPIC, subtopic = "#{myManagedBean.userIdentifier}")
    Event<String> pushEvent;

    @PostConstruct
    public void initialize() {
        super.initBean();
        if (userIdentifier == null) {
            userIdentifier = sessionUser.getId();
        }
    }

    public synchronized void push() throws Exception {

            pushEvent.fire("PushTest");
    }

    public String getMessage() {
        return message;
    }

    public void setMessage(String message) {
        this.message = message;
    }

    public Event<String> getPushEvent() {
        return pushEvent;
    }

    public void setPushEvent(Event<String> pushEvent) {
        this.pushEvent = pushEvent;
    }

    public String getUserIdentifier() {
        return userIdentifier;
    }

    public void setUserIdentifier(String userIdentifier) {
        this.userIdentifier = userIdentifier;
    }

}

       

      When I click the "PUSH" button in my producer.xhtml I'm getting  java.lang.NullPointerException at "pushEvent.fire("PushTest");"  line. Is there a problem when using @Inject ?

       

      Thanks,

      Buraq