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RSS and Atom
Both AbstractAtomFeedView
and AbstractRssFeedView
inherit from the
AbstractFeedView
base class and are used to provide Atom and RSS Feed views, respectively. They
are based on 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). The following example shows how to do so:
-
Java
-
Kotlin
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
}
}
class SampleContentAtomView : AbstractAtomFeedView() {
override fun buildFeedMetadata(model: Map<String, Any>,
feed: Feed, request: HttpServletRequest) {
// implementation omitted
}
override fun buildFeedEntries(model: Map<String, Any>,
request: HttpServletRequest, response: HttpServletResponse): List<Entry> {
// implementation omitted
}
}
Similar requirements apply for implementing AbstractRssFeedView
, as the following example shows:
-
Java
-
Kotlin
public class SampleContentRssView 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
}
}
class SampleContentRssView : AbstractRssFeedView() {
override fun buildFeedMetadata(model: Map<String, Any>,
feed: Channel, request: HttpServletRequest) {
// implementation omitted
}
override fun buildFeedItems(model: Map<String, Any>,
request: HttpServletRequest, response: HttpServletResponse): List<Item> {
// implementation omitted
}
}
The buildFeedItems()
and buildFeedEntries()
methods 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 is automatically written to the response
object after the method returns.
For an example of creating an Atom view, see Alef Arendsen’s Spring Team Blog entry.