We have requirement to communicate between two portal one solution is interproccess communication with help of the event. Today we will develop inter proccess communication portlets example. You can find source code for sender portlet and receiver portlet below link. Sender portlet Receiver portlet 1 Create portlet Sender. 2 Create jsp inside Folder docroot -> html -> sender -> view.jsp put below content inside it. <%@ 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="<%=up...