Javascript 基于事件的IPC（使用事件的portlet间通信）

我是新来的，雷。我在不同liferay插件项目中的两个Portlet之间的通信方面有问题。为了理解这一点，我使用了我在网上找到的示例代码。当我按下按钮时，出现以下错误：

java.lang.NoSuchMethodException: com.liferay.util.bridges.mvc.MVCPortlet.processFood(javax.portlet.ActionRequest, javax.portlet.ActionResponse) at java.lang.Class.getMethod(Unknown Source).

代码如下：

view.jsp（发件人）

Receiver.java

import javax.portlet.Event;
import javax.portlet.EventRequest;
import javax.portlet.EventResponse;
import javax.portlet.ProcessEvent;
import com.liferay.util.bridges.mvc.MVCPortlet;

public class Receiver extends MVCPortlet {

    @ProcessEvent(qname = "{http://aditya/events}foodType")
    public void receiveFoodType(EventRequest request, EventResponse response) {
        Event event = request.getEvent();
        String foodType  = (String) event.getValue();  
        request.setAttribute("foodType", foodType);    
    }
}

---

谢谢

我认为您的问题在于您在接收方portlet中的portlet.xml文件中放入了标签

，但您必须使用标签

您可以在此url中查看更多详细信息：

---

希望这有帮助。注意。

您是否在portlet.xml中声明了事件定义？是的，在发送方（portlet.xml）和接收方（portlet.xml）中。在

声明之外的每个

portlet.xml

文件中都应该有一个关于此事件的声明。您也包括了吗？是的，在Receiver portlet中有标记。因此，您必须使用标记来更改它

<%@ taglib uri="http://java.sun.com/portlet_2_0" prefix="portlet" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<portlet:defineObjects />

<c:set var="food" value="${foodType}"/>

<c:choose>
    <c:when test="${food == 'veg'}">
       <h3><font color="green"> You are Vegetarian. You Can Enjoy Dosa</font></h3>
    </c:when>
    <c:when test="${food == 'non-veg'}">
     <h3> <font color="red">You are Non - Vegetarian. You can enjoy Chicken.</font></h3>
    </c:when>
    <c:otherwise>
     <h3>Please Select Food Type</h3> 
    </c:otherwise>
</c:choose>

import java.io.IOException;

import javax.portlet.ActionRequest;
import javax.portlet.ActionResponse;
import javax.portlet.PortletException;
import javax.portlet.ProcessAction;
import javax.xml.namespace.QName;

import com.liferay.portal.kernel.util.ParamUtil;
import com.liferay.util.bridges.mvc.MVCPortlet;

public class Sender extends MVCPortlet {

    @ProcessAction(name="processFood")
    public void processFood(ActionRequest request, ActionResponse response) throws PortletException, IOException {
        String foodType = ParamUtil.getString(request, "foodType" ,"default");

        if(!foodType.equalsIgnoreCase("default"))
        {
            //We fetch Qname from portlet.xml and set value in it
            QName foodEvent = new QName("http://aditya/events", "foodType");
            response.setEvent(foodEvent, foodType);
        }
    }
}

import javax.portlet.Event;
import javax.portlet.EventRequest;
import javax.portlet.EventResponse;
import javax.portlet.ProcessEvent;
import com.liferay.util.bridges.mvc.MVCPortlet;

public class Receiver extends MVCPortlet {

    @ProcessEvent(qname = "{http://aditya/events}foodType")
    public void receiveFoodType(EventRequest request, EventResponse response) {
        Event event = request.getEvent();
        String foodType  = (String) event.getValue();  
        request.setAttribute("foodType", foodType);    
    }
}