[FIXED HUDSON-1569]

Added a new RSS feed type that just shows the last builds.
This techniques uses the unique ID tied to a project and keep updating the same entry by the last build.

This is a stretch of the RSS use case, and so some RSS readers do not work with this notion --- for example, the "straw" RSS reader didn't work.

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@11363 71c3de6d-444a-0410-be80-ed276b4c234a

core/src/main/java/hudson/model/Run.java

@@ -1176,7 +1176,37 @@ public abstract class Run <JobT extends Job<JobT,RunT>,RunT extends Run<JobT,Run
     /**
      * {@link FeedAdapter} to produce feed from the summary of this build.
      */
-    public static final FeedAdapter<Run> FEED_ADAPTER = new FeedAdapter<Run>() {
+    public static final FeedAdapter<Run> FEED_ADAPTER = new DefaultFeedAdapter();
+
+    /**
+     * {@link FeedAdapter} to produce feeds to show one build per project.
+     */
+    public static final FeedAdapter<Run> FEED_ADAPTER_LATEST = new DefaultFeedAdapter() {
+        /**
+         * The entry unique ID needs to be tied to a project, so that
+         * new builds will replace the old result.
+         */
+        public String getEntryID(Run e) {
+            // can't use a meaningful year field unless we remember when the job was created.
+            return "tag:hudson.dev.java.net,2008:"+e.getParent().getAbsoluteUrl();
+        }
+    };
+
+    /**
+     * {@link BuildBadgeAction} that shows the logs are being kept.
+     */
+    public final class KeepLogBuildBadge implements BuildBadgeAction {
+        public String getIconFileName() { return null; }
+        public String getDisplayName() { return null; }
+        public String getUrlName() { return null; }
+        public String getWhyKeepLog() { return Run.this.getWhyKeepLog(); }
+    }
+
+    public static final PermissionGroup PERMISSIONS = new PermissionGroup(Run.class,Messages._Run_Permissions_Title());
+    public static final Permission DELETE = new Permission(PERMISSIONS,"Delete", Permission.DELETE);
+    public static final Permission UPDATE = new Permission(PERMISSIONS,"Update", Permission.UPDATE);
+
+    private static class DefaultFeedAdapter implements FeedAdapter<Run> {
         public String getEntryTitle(Run entry) {
             return entry+" ("+entry.getResult()+")";
         }
@@ -1185,7 +1215,6 @@ public abstract class Run <JobT extends Job<JobT,RunT>,RunT extends Run<JobT,Run
             return entry.getUrl();
         }
 
-        // produces a tag URL as per RFC 4151, required by Atom 1.0
         public String getEntryID(Run entry) {
             return "tag:" + "hudson.dev.java.net,"
                 + entry.getTimestamp().get(Calendar.YEAR) + ":"
@@ -1200,19 +1229,5 @@ public abstract class Run <JobT extends Job<JobT,RunT>,RunT extends Run<JobT,Run
         public Calendar getEntryTimestamp(Run entry) {
             return entry.getTimestamp();
         }
-    };
-
-    /**
-     * {@link BuildBadgeAction} that shows the logs are being kept.
-     */
-    public final class KeepLogBuildBadge implements BuildBadgeAction {
-        public String getIconFileName() { return null; }
-        public String getDisplayName() { return null; }
-        public String getUrlName() { return null; }
-        public String getWhyKeepLog() { return Run.this.getWhyKeepLog(); }
     }
-
-    public static final PermissionGroup PERMISSIONS = new PermissionGroup(Run.class,Messages._Run_Permissions_Title());
-    public static final Permission DELETE = new Permission(PERMISSIONS,"Delete", Permission.DELETE);
-    public static final Permission UPDATE = new Permission(PERMISSIONS,"Update", Permission.UPDATE);
 }

core/src/main/java/hudson/model/View.java

@@ -282,6 +282,19 @@ public abstract class View extends AbstractModelObject implements AccessControll
             runs.newBuilds(), Run.FEED_ADAPTER, req, rsp );
     }
 
+    public void doRssLatest( StaplerRequest req, StaplerResponse rsp ) throws IOException, ServletException {
+        List<Run> lastBuilds = new ArrayList<Run>();
+        for (TopLevelItem item : getItems()) {
+            if (item instanceof Job) {
+                Job job = (Job) item;
+                Run lb = job.getLastBuild();
+                if(lb!=null)    lastBuilds.add(lb);
+            }
+        }
+        RSS.forwardToRss(getDisplayName()+" last builds only", getUrl(),
+            lastBuilds, Run.FEED_ADAPTER_LATEST, req, rsp );
+    }
+
     public static final Comparator<View> SORTER = new Comparator<View>() {
         public int compare(View lhs, View rhs) {
             return lhs.getViewName().compareTo(rhs.getViewName());

core/src/main/resources/lib/hudson/rssBar.jelly

 <j:jelly xmlns:j="jelly:core" xmlns:x="jelly:xml" xmlns:st="jelly:stapler" xmlns:d="jelly:define" xmlns:l="/lib/layout" xmlns:t="/lib/hudson" xmlns:f="/lib/form">
   <div align="right" style="margin:1em">
     <a href="${rootURL}/legend">${%Legend}</a>
-    <st:nbsp/><st:nbsp/><st:nbsp/><st:nbsp/>
-    <a href="rssAll"><img src="${imagesURL}/atom.gif" border="0"/> ${%for all}</a>
-    <st:nbsp/><st:nbsp/><st:nbsp/><st:nbsp/>
-    <a href="rssFailed"><img src="${imagesURL}/atom.gif" border="0"/> ${%for failures}</a>
+    <span style="padding-left:1em">
+      <a href="rssAll"><img src="${imagesURL}/atom.gif" border="0"/> ${%for all}</a>
+    </span>
+    <span style="padding-left:1em">
+      <a href="rssFailed"><img src="${imagesURL}/atom.gif" border="0"/> ${%for failures}</a>
+    </span>
+    <span style="padding-left:1em">
+      <a href="rssLatest"><img src="${imagesURL}/atom.gif" border="0"/> ${%for just last builds}</a>
+    </span>
   </div>
 </j:jelly>