Refactored streaming UI into two files.

Author: tdas

streaming/src/main/scala/org/apache/spark/streaming/ui/StreamingUI.scala renamed to streaming/src/main/scala/org/apache/spark/streaming/ui/StreamingPage.scala

@@ -23,10 +23,10 @@ import javax.servlet.http.HttpServletRequest
 import scala.xml.Node
 
 import org.apache.spark.Logging
-import org.apache.spark.streaming.StreamingContext
 import org.apache.spark.ui._
 import org.apache.spark.util.Distribution
 
+/** Page for Spark Web UI that shows statistics of a streaming job */
 private[ui] class StreamingPage(parent: StreamingTab)
   extends UIPage("") with Logging {
 
@@ -287,12 +287,3 @@ private[ui] class StreamingPage(parent: StreamingTab)
   }
 }
 
-private[spark] class StreamingTab(val ssc: StreamingContext)
-  extends UITab("streaming") with Logging {
-
-  val streamingPage = new StreamingPage(this)
-  ssc.sc.ui.attachTab(this)
-
-  /** Initialize listener and attach pages. */
-  def start() { }
-}

streaming/src/main/scala/org/apache/spark/streaming/ui/StreamingProgressListener.scala

@@ -1,3 +1,20 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package org.apache.spark.streaming.ui
 
 import org.apache.spark.streaming.{Time, StreamingContext}

streaming/src/main/scala/org/apache/spark/streaming/ui/StreamingTab.scala

@@ -0,0 +1,32 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.streaming.ui
+
+import org.apache.spark.streaming.StreamingContext
+import org.apache.spark.ui.UITab
+import org.apache.spark.Logging
+
+/** Spark Web UI tab that shows statistics of a streaming job */
+private[spark] class StreamingTab(val ssc: StreamingContext)
+  extends UITab("streaming") with Logging {
+
+  val streamingPage = new StreamingPage(this)
+  ssc.sc.ui.attachTab(this)
+
+  def start() { }
+}