Added scala docs.

Author: tdas

streaming/src/main/scala/org/apache/spark/streaming/StreamingContextState.scala

@@ -46,7 +46,12 @@ class StreamingContextState private (enumValue: Int) {
  */
 @DeveloperApi
 object StreamingContextState {
+  /** State representing that the StreamingContext has been initialized and ready for setup */
   val INITIALIZED = new StreamingContextState(0)
+
+  /** State representing that the StreamingContext has been started after setting it up */
   val STARTED = new StreamingContextState(1)
+
+  /** State representing that the StreamingContext has been stopped and cannot be used any more*/
   val STOPPED = new StreamingContextState(2)
 }

streaming/src/main/scala/org/apache/spark/streaming/api/java/JavaStreamingContext.scala

@@ -579,6 +579,9 @@ class JavaStreamingContext(val ssc: StreamingContext) extends Closeable {
   }
 
 
+  /**
+   * Return the current state of the context.
+   */
   def getState(): StreamingContextState = {
     ssc.getState()
   }