I have issue with PrimeFaces 6.0 push, I have searched all questions here and no answer helped me. I'm building a internal email system and I'm trying to notify user if he has new email inserted in the DB based on back end event (observer pattern), here is my code:
web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" version="3.1">
<display-name>Test Foo Email system</display-name>
<servlet>
<servlet-name>Faces Servlet</servlet-name>
<servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<!-- primeFaces push declaration -->
<servlet>
<servlet-name>Push Servlet</servlet-name>
<servlet-class>org.primefaces.push.PushServlet</servlet-class>
<async-supported>true</async-supported>
</servlet>
<servlet-mapping>
<servlet-name>Push Servlet</servlet-name>
<url-pattern>/primepush/ *</url-pattern>
</servlet-mapping>
<!-- Ends here-->
<servlet-mapping>
<servlet-name>Faces Servlet</servlet-name>
<url-pattern>/faces/ *</url-pattern>
</servlet-mapping>
<context-param>
<description>State saving method: 'client' or 'server' (=default). See JSF Specification 2.5.2</description>
<param-name>javax.faces.STATE_SAVING_METHOD</param-name>
<param-value>client</param-value>
</context-param>
<context-param>
<param-name>javax.servlet.jsp.jstl.fmt.localizationContext</param-name>
<param-value>resources.application</param-value>
</context-param>
<listener>
<listener-class>com.sun.faces.config.ConfigureListener</listener-class>
</listener>
</web-app>
My foo.xhtml page code sample
<script type="text/javascript">
function handleMessage(facesmessage) {
facesmessage.severity = 'info';
PF('growl').show([facesmessage]);
}
</script>
<div class="New_Message_container ">
<!-- primefaces Push component -->
<p:growl widgetVar="growl" showDetail="true" />
<p:socket onMessage="handleMessage" channel="/notify" />
</div>
Controller class:
private final static String CHANNEL = "/notify";
.
.
.
private void notifyView(NewEmailEvent evt) {
String CurrentUser = this.currentUser.getEmailID();
String EventUserId = evt.getUserID();
if (CurrentUser.equalsIgnoreCase(EventUserId)) {
EventBus eventBus = EventBusFactory.getDefault().eventBus();
eventBus.publish(CHANNEL,
new FacesMessage("New Mail", "You have new Mail"));
}
}
NotifyResource class
import javax.faces.application.FacesMessage;
import org.primefaces.push.annotation.OnMessage;
import org.primefaces.push.annotation.PushEndpoint;
import org.primefaces.push.impl.JSONEncoder;
@PushEndpoint("/notify")
public class NotifyResource {
@OnMessage(encoders = {JSONEncoder.class})
public FacesMessage onMessage(FacesMessage message) {
return message;
}
}
Included required libraries which i found was required for this code, I have downloaded these jars from the web which are used in my sample.
atmosphere-annotations-2.4.9.jar
atmosphere-compat-jbossweb-2.0.1.jar
atmosphere-compat-tomcat-2.0.1.jar
atmosphere-compat-tomcat7-2.0.1.jar
atmosphere-runtime-2.4.9.jar
primefaces-6.0.jar
slf4j-api-1.7.22.jar
slf4j-simple-1.7.22.jar
I have tired to debug my code and I noticed that the event bus it NULL when I try to use it (eventBus.publish()) so I got java.lang.NullPointerException.
