Last updated on
Apr 27, 2021
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Also applies to ColdFusion
You publish events in the processAction() method of the portlet code by calling setEvent() on the ActionResponse object. This setEvent() method takes two parameters: the QName of the event object and the type of object defined in portlet.xml.
Following is an example of processAction() method.
<cffunction name="processAction" returntype="void" access="public" output="false" hint="Called by the portlet container to allow the portlet to process an action request.">
<cfargument name="actionRequest" type="any" required="true" hint="A javax.portlet.ActionRequest java object">
<cfargument name="actionResponse" type="any" required="true" hint="A javax.portlet.ActionResponse java object">
<cfset super.processAction(arguments.actionRequest, arguments.actionResponse)>
<!--- send event notification --->
<cftry>
<cfset arguments.actionResponse.setEvent("HelloEvent", request.portlet.parameters.event_value)>
<cfcatch type="any">
<cflog file="simple-event-portlet" type="error" text="processAction() threw exception: #cfcatch.message#">
</cfcatch>
</cftry>
</cffunction>
Capture events in processEvent() method:
<cffunction name="processEvent" returntype="void" access="public" output="false" hint="Called by the portlet container requesting the portlet to process a specific event.">
<cfargument name="eventRequest" type="any" required="true" hint="A javax.portlet.EventRequest java object">
<cfargument name="eventResponse" type="any" required="true" hint="A javax.portlet.EventResponse java object">
<cfset var e = StructNew()>
<cftry>
<cfset e.name = arguments.eventRequest.getEvent().getName()>
<cfset e.value = arguments.eventRequest.getEvent().getValue()>
<cfif NOT IsDefined("application.EventReceivingPortletEvents")>
<cfset application.EventReceivingPortletEvents = ArrayNew(1)>
</cfif>
<cfset ArrayAppend(application.EventReceivingPortletEvents,e)>
<cfcatch type="any">
</cfcatch>
</cftry>
</cffunction>