Exposing IView contents as syndication format

[praveenkumar_gudapati]

We all know the famous syndication formats like RSS/Atom and also their advantages.
So how about exposing our Iview contents as RSS/Atom, which is really useful to keep our users uptodate of the content changes?

In this blog I will show you how to expose Custom IView contents as RSS 2.0 format using ROME open source library (https://rome.dev.java.net/)

ROME libraries support all popular RSS and ATOM formats.

Download the latest rome library (rome-1.0RC1.jar) and also latest jdom library (jdom.jar) from http://www.jdom.org/  and put them in distPORTAL-INFprivatelib folder of your project.

For our example I will implement an AbstractPortalComponent which is a news component with RSS functionality.

Here are the screenshots of what I have implemented:

Shows an Iview with RSS tray option

Clicking the above MyRss tray option shows the RSS of the news Iview

So adding the RSS link to your favourite RSS Client shows news updates from your Iview. The Rss link in the above example is http://wdfv00196150b:53000http://www.sdn.sap.com/irj/servlet/prt/portal/prtmode/rss/prtroot/myrsspro...

 

Here is the code:

<span>package com.test;import java.io.IOException;import java.util.ArrayList;import java.util.List;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import com.sap.tc.logging.Location;import com.sapportals.portal.prt.component.AbstractPortalComponent;import com.sapportals.portal.prt.component.IPortalComponentRequest;import com.sapportals.portal.prt.component.IPortalComponentResponse;import com.sun.syndication.feed.synd.SyndContent;import com.sun.syndication.feed.synd.SyndContentImpl;import com.sun.syndication.feed.synd.SyndEntry;import com.sun.syndication.feed.synd.SyndEntryImpl;import com.sun.syndication.feed.synd.SyndFeed;import com.sun.syndication.feed.synd.SyndFeedImpl;import com.sun.syndication.io.FeedException;import com.sun.syndication.io.SyndFeedOutput;public class MyRssComponent extends AbstractPortalComponent { private static final String MIME_TYPE = "application/xml; charset=UTF-8"; public static final Location logLocation = Location.getLocation(MyRssComponent.class); //The prtmode in this URL is set to rss, so calling this URL will execute // the doRss method of this component public static final String RSSURL = "</span><a class="jive-link-external-small" href="<a href="http://www.sdn.sap.com/irj/servlet/prt/portal/prtmode/rss/prtroot/myrssproject.myrsscomponent" target="_blank">http://www.sdn.sap.com/irj/servlet/prt/portal/prtmode/rss/prtroot/myrssproject.myrsscomponent</a>"><a href="http://www.sdn.sap.com/irj/servlet/prt/portal/prtmode/rss/prtroot/myrssproject.myrsscomponent" target="_blank">http://www.sdn.sap.com/irj/servlet/prt/portal/prtmode/rss/prtroot/myrssproject.myrsscomponent</a></a><span>"; public void doContent(IPortalComponentRequest request, IPortalComponentResponse response) {  response.write(addTrayOptionJSCode("MyRss", "showRss", request.getComponentContext().getContextName()));  NewsItemsBean[] beans = initDataSource();  //Show news here in proper layout  for (int i = 0; i < beans.length; i++) {   NewsItemsBean newsBean = beans[i];   response.write("</span>

• " + newsBean.title + "
  
• "); } } /* *Adds the MyRss tray option to Iview tray */ private String addTrayOptionJSCode(String name, String function, String iViewID) { StringBuffer code = new StringBuffer(); code.append("