Both AbstractAtomFeedView and AbstractRssFeedView inherit from the base class AbstractFeedView and are used to provide Atom and RSS Feed views respectfully. They are based on java.net's ROME project and are located in the package org.springframework.web.servlet.view.feed.

AbstractAtomFeedView requires you to implement the buildFeedEntries method and optionally override the buildFeedMetadata method (the default implementation is empty), as shown below

public class SampleContentAtomView extends AbstractAtomFeedView {

  @Override
  protected void buildFeedMetadata(Map<String, Object> model, Feed feed,
                                   HttpServletRequest request) {
      // implementation omitted
  }

  @Override
  protected List<Entry> buildFeedEntries(Map<String, Object> model,
                                         HttpServletRequest request,
                                         HttpServletResponse response) throws Exception {

      // implementation omitted
  }
}

Similar requirements apply for implementing AbstractRssFeedView, as shown below

public class SampleContentAtomView extends AbstractRssFeedView {

  @Override
  protected void buildFeedMetadata(Map<String, Object> model, Channel feed,
                                   HttpServletRequest request) {
    // implementation omitted
  }

  @Override
  protected List<Item> buildFeedItems(Map<String, Object> model,
                                      HttpServletRequest request,
                                      HttpServletResponse response) throws Exception {
    // implementation omitted
  }

}

The buildFeedItems and buildFeedEntires pass in the HTTP request in case you need to access the Locale. The HTTP response is passed in only for the setting of cookies or other HTTP headers. The feed will automatically be written to the response object after the method returns.

For an example of creating a Atom view please refer to Alef Arendsen's SpringSource TeamBlog entry.