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/*
* 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.SparkException
import org.apache.spark.internal.Logging
import org.apache.spark.streaming.StreamingContext
import org.apache.spark.ui.{SparkUI, SparkUITab}
/**
* Spark Web UI tab that shows statistics of a streaming job.
* This assumes the given SparkContext has enabled its SparkUI.
*/
private[spark] class StreamingTab(val ssc: StreamingContext)
extends SparkUITab(StreamingTab.getSparkUI(ssc), "streaming") with Logging {
import StreamingTab._
private val STATIC_RESOURCE_DIR = "org/apache/spark/streaming/ui/static"
val parent = getSparkUI(ssc)
val listener = ssc.progressListener
ssc.addStreamingListener(listener)
ssc.sc.addSparkListener(listener)
parent.setStreamingJobProgressListener(listener)
attachPage(new StreamingPage(this))
attachPage(new BatchPage(this))
def attach() {
getSparkUI(ssc).attachTab(this)
getSparkUI(ssc).addStaticHandler(STATIC_RESOURCE_DIR, "/static/streaming")
}
def detach() {
getSparkUI(ssc).detachTab(this)
getSparkUI(ssc).removeStaticHandler("/static/streaming")
}
}
private object StreamingTab {
def getSparkUI(ssc: StreamingContext): SparkUI = {
ssc.sc.ui.getOrElse {
throw new SparkException("Parent SparkUI to attach this tab to not found!")
}
}
}
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