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apache · Apr 1, 2015 · 1578a4a · 1578a4a
1 parent 674f8dc
commit 1578a4a
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/core/src/main/scala/org/apache/spark/status/api/v1/JsonRootResource.scala b/core/src/main/scala/org/apache/spark/status/api/v1/JsonRootResource.scala
@@ -98,6 +98,11 @@ private[spark] object JsonRootResource {
 }
 
 
+/**
+ * This trait is shared by the all the root containers for application UI information --
+ * the HistoryServer, the Master UI, and the application UI.  This provides the common
+ * interface needed for them all to expose application info as json.
+ */
 private[spark] trait UIRoot {
   def getSparkUI(appKey: String): Option[SparkUI]
   def getApplicationInfoList: Seq[ApplicationInfo]