primefaces jsf EventBus onMessage未显示

Question

我正在使用primefaces和jsf实现推送通知我尝试了这段代码，但是通知我是这样的NotifyResource

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;
 }
}

但未显示通知

<h:body>

 <p:growl widgetVar="growl" showDetail="true" />

 <h:form>
  <h:panelGrid columns="2">
   <p:outputLabel for="summary" value="Summary: " />
   <p:inputText id="summary" value="#{notifyView.summary}"
    required="true" />

   <p:outputLabel for="detail" value="Detail: " />
   <p:inputText id="detail" value="#{notifyView.detail}" required="true" />
  </h:panelGrid>

  <p:commandButton value="Send" actionListener="#{notifyView.send}" />
 </h:form>

 <p:socket onMessage="handleMessage" channel="/notify" />

 <script type="text/javascript">
        function handleMessage(facesmessage) {
            facesmessage.severity = 'info';

            PF('growl').show([facesmessage]);
        }
 </script>
</h:body>
</html>

任何人都可以帮助我吗？我正在使用primefaces 6.0和氛围2.4.0