Question

我有一个ManagedBean来处理Item的列表，一个预定的线程每3秒添加一个新的Item并将该项推送到客户端，之后它通知页面必须更新ui：repeat组件以显示新的项目

的index.xhtml

<?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://xmlns.jcp.org/jsf/html"
      xmlns:p="http://primefaces.org/ui" xmlns:ui="http://java.sun.com/jsf/facelets"
      xml:lang="en" lang="en">
<h:head>
    <title>GG Well Trade</title>
</h:head>
<h:body>

    <p:socket channel="/notify">
        <p:ajax event="message" update="content"/>
    </p:socket>

    <p:commandButton value="Start" actionListener="#{bean.start()}"/>

    <h:form id="content">
        <ui:repeat value="#{bean.items}" var="item">
            <p:outputLabel for="foo" value="#{item.label}" />
            <p:inputText id="foo" value="#{item.value}" />
            <p:commandButton value="Remove" actionListener="#{bean.remove(item)}" update="@form" />
            <br/>
        </ui:repeat>
    </h:form>
</h:body>
</html>

Bean.class

@ManagedBean
@RequestScoped
@PushEndpoint("/notify")
public class Bean implements Serializable{

    private List<Item> items;

    @PostConstruct
    public void init() {
        items = new ArrayList<Item>();
    }

    public void start() {
        ScheduledExecutorService timer = Executors.newSingleThreadScheduledExecutor();
        timer.scheduleAtFixedRate(()->add(),0,3,TimeUnit.SECONDS);
    }

    public void add() {
        Item item = new Item();
        item.setLabel("label " + items.size());
        items.add(item);
        System.out.println(Thread.currentThread().getName()+ ": label" + items.size() + " added.");
        EventBus eventBus = EventBusFactory.getDefault().eventBus();
        eventBus.publish("/notify", item);
    }

    @OnMessage(encoders = {JSONEncoder.class})
    public Item onMessage(Item item){
        return item;
    }

    public void remove(Item item) {
        items.remove(item);
    }

    public List<Item> getItems() {
        return items;
    }
}

在开发者控制台（Chrome）中收到请求，但不会更新表单。怎么了？

编辑：每个响应在开发控制台中都是这样的：

<?xml version='1.0' encoding='UTF-8'?>
<partial-response id="j_id1"><changes><update id="j_id1:javax.faces.ViewState:0"><![CDATA[-5528246304040933585:3098257791475168902]]></update></changes></partial-response>

p：push后组件不会更新

0 个答案: