There are 3 ways to share the data between 2 portlets.
1. Portlet session
2. IPC Mechanisms
Public Render Parameters
Event
Client-Side IPC
3.Cookies
Example:
Event Inter Portlet Communication:
Step:1
Create two portlet one is Sender portlet and another one is Receiver portlet.
Step:2
Go to your portlet location open the sender portlet folder.Then edit the Portlet.xml file(docroot/WEB-INF/Portlet.Xml)
<?xml version="1.0"?>
<portlet-app
version="2.0"
xmlns="http://java.sun.com/xml/ns/portlet/portlet-app_2_0.xsd"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation=http://java.sun.com/xml/ns/portlet/portlet-app_2_0.xsd http://java.sun.com/xml/ns/portlet/portlet-app_2_0.xsd >
<portlet>
<portlet-name>sender</portlet-name>
<display-name>Sender Portlet</display-name>
<portlet-class>com.liferay.portlet.SenderPortletAction</portlet-class>
<init-param>
<name>view-jsp</name>
<value>/html/sender/view.jsp</value>
</init-param>
<expiration-cache>0</expiration-cache>
<supports>
<mime-type>text/html</mime-type>
</supports>
<portlet-info>
<title>Sender Portlet</title>
<short-title>Sender Portlet</short-title>
<keywords>Sender Portlet</keywords>
</portlet-info>
<security-role-ref>
<role-name>administrator</role-name>
</security-role-ref>
<security-role-ref>
<role-name>guest</role-name>
</security-role-ref>
<security-role-ref>
<role-name>power-user</role-name>
</security-role-ref>
<security-role-ref>
<role-name>user</role-name>
</security-role-ref>
<supported-publishing-event>
<qname xmlns:x="http://liferay.com">x:userDetails</qname>
</supported-publishing-event>
</portlet>
</portlet-app>
Step3:
Create a SenderPortletAction.java . Under src/com/liferay/portlet dir.
package com.liferay.portlet;
import javax.portlet.ActionRequest;
import javax.portlet.ActionResponse;
import javax.xml.namespace.QName;
import com.liferay.portal.kernel.util.ParamUtil;
import com.liferay.util.bridges.mvc.MVCPortlet;
public class SenderPortletAction extends MVCPortlet {
public void addform(ActionRequest actionRequest, ActionResponse actionResponse){
QName qName = new QName("http://liferay.com", "userDetails", "x");
String username=ParamUtil.getString(actionRequest, "username");
actionResponse.setEvent(qName, username);
}
}
Step:4
Create a view.jsp under docroot/html/sender/view.jsp dir.
<%@ taglib uri="http://java.sun.com/portlet_2_0" prefix="portlet" %>
<portlet:defineObjects />
<%@ taglib uri="http://liferay.com/tld/aui" prefix="aui" %>
<%@page import="javax.portlet.PortletURL"%>
<%@ taglib uri="http://liferay.com/tld/ui" prefix="liferay-ui" %>
<%@page import="javax.portlet.PortletSession"%>
<portlet:actionURL name="addform" var="updateURL">
</portlet:actionURL >
<aui:form action="<%=updateURL%>" method="post" name="fm" >
<h1>IPC: Sender portlet</h1>
<aui:input label="User Name" name="username" type="text"/><img title="Please Enter the User Name" style="margin-left:74px;position:relative;top:-43px" src="/html/themes/control_panel/images/portlet/help.png"/>
<aui:button-row>
<aui:button type="submit" />
</aui:button-row>
</aui:form>
Step:5
Go to your portlet location open the receiver portlet folder.Then edit the Portlet.xml file(docroot/WEB-INF/Portlet.Xml)
<?xml version="1.0"?>
<portlet-app
version="2.0"
xmlns="http://java.sun.com/xml/ns/portlet/portlet-app_2_0.xsd"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation=http://java.sun.com/xml/ns/portlet/portlet-app_2_0.xsd http://java.sun.com/xml/ns/portlet/portlet-app_2_0.xsd>
<portlet>
<portlet-name>receiver</portlet-name>
<display-name>Receiver</display-name>
<portlet-class>com.liferay.portlet.ReceiverPortletAction</portlet-class>
<init-param>
<name>view-jsp</name>
<value>/html/receiver/view.jsp</value>
</init-param>
<expiration-cache>0</expiration-cache>
<supports>
<mime-type>text/html</mime-type>
</supports>
<portlet-info>
<title>Receiver</title>
<short-title>Receiver</short-title>
<keywords>Receiver</keywords>
</portlet-info>
<security-role-ref>
<role-name>administrator</role-name>
</security-role-ref>
<security-role-ref>
<role-name>guest</role-name>
</security-role-ref>
<security-role-ref>
<role-name>power-user</role-name>
</security-role-ref>
<security-role-ref>
<role-name>user</role-name>
</security-role-ref>
<supported-processing-event xmlns:x="http://liferay.com">
<qname>x:userDetails</qname>
</supported-processing-event>
</portlet>
</portlet-app>
Step:6
Create a ReceiverPortletAction.java Under src/com/liferay/portlet dir.
package com.liferay.portlet;
import java.io.IOException;
import javax.portlet.Event;
import javax.portlet.EventRequest;
import javax.portlet.EventResponse;
import javax.portlet.PortletException;
import com.liferay.util.bridges.mvc.MVCPortlet;
public class ReceiverPortletAction extends MVCPortlet {
public void processEvent(EventRequest request, EventResponse response)
throws PortletException, IOException {
Event event = request.getEvent();
response.setRenderParameter("USERNAME", (String) event.getValue());
}
}
Step:7
Create a view.jsp under docroot/html/receiver/view.jsp dir.
<%@ taglib uri="http://java.sun.com/portlet_2_0" prefix="portlet" %>
<portlet:defineObjects />
<%@ taglib uri="http://liferay.com/tld/aui" prefix="aui" %>
<%@page import="javax.portlet.PortletURL"%>
<%@ taglib uri="http://liferay.com/tld/ui" prefix="liferay-ui" %>
<%@page import="javax.portlet.PortletSession"%>
<%
String username= renderRequest.getParameter("USERNAME");
%>
<h1>IPC: Receiver portlet</h1>
The UserName is: <%=username %>
Step:8
Then, ant-deploy for both portlets.
