YARN-4995. FairScheduler: Display per-queue demand on the scheduler page. (xupeng via kasha)

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/webapp/FairSchedulerPage.java

@@ -71,6 +71,7 @@ public class FairSchedulerPage extends RmView {
     protected void render(Block html) {
       ResponseInfo ri = info("\'" + qinfo.getQueueName() + "\' Queue Status").
           _("Used Resources:", qinfo.getUsedResources().toString()).
+          _("Demand Resources:", qinfo.getDemandResources().toString()).
           _("Num Active Applications:", qinfo.getNumActiveApplications()).
           _("Num Pending Applications:", qinfo.getNumPendingApplications()).
           _("Min Resources:", qinfo.getMinResources().toString()).

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/webapp/dao/FairSchedulerQueueInfo.java

@@ -54,6 +54,7 @@ public class FairSchedulerQueueInfo {
   private ResourceInfo minResources;
   private ResourceInfo maxResources;
   private ResourceInfo usedResources;
+  private ResourceInfo demandResources;
   private ResourceInfo steadyFairResources;
   private ResourceInfo fairResources;
   private ResourceInfo clusterResources;
@@ -81,6 +82,7 @@ public class FairSchedulerQueueInfo {
     clusterResources = new ResourceInfo(scheduler.getClusterResource());
     
     usedResources = new ResourceInfo(queue.getResourceUsage());
+    demandResources = new ResourceInfo(queue.getDemand());
     fractionMemUsed = (float)usedResources.getMemory() /
         clusterResources.getMemory();
 
@@ -196,6 +198,13 @@ public class FairSchedulerQueueInfo {
     return usedResources;
   }
 
+  /**
+   * @return the demand resource of this queue.
+     */
+  public ResourceInfo getDemandResources() {
+    return demandResources;
+  }
+
   /**
    * Returns the queue's min share in as a fraction of the entire
    * cluster capacity.