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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.ui.storage
import javax.servlet.http.HttpServletRequest
import scala.collection.mutable
import org.eclipse.jetty.servlet.ServletContextHandler
import org.apache.spark.ui._
import org.apache.spark.ui.JettyUtils._
import org.apache.spark.scheduler._
import org.apache.spark.storage.{RDDInfo, StorageStatusListener, StorageUtils}
/** Web UI showing storage status of all RDD's in the given SparkContext. */
private[ui] class BlockManagerUI(parent: SparkUI) {
val appName = parent.appName
val basePath = parent.basePath
private val indexPage = new IndexPage(this)
private val rddPage = new RDDPage(this)
private var _listener: Option[BlockManagerListener] = None
lazy val listener = _listener.get
def start() {
_listener = Some(new BlockManagerListener(parent.storageStatusListener))
}
def getHandlers = Seq[ServletContextHandler](
createServletHandler("/storage/rdd",
(request: HttpServletRequest) => rddPage.render(request), parent.securityManager, basePath),
createServletHandler("/storage",
(request: HttpServletRequest) => indexPage.render(request), parent.securityManager, basePath)
)
}
/**
* A SparkListener that prepares information to be displayed on the BlockManagerUI
*/
private[ui] class BlockManagerListener(storageStatusListener: StorageStatusListener)
extends SparkListener {
private val _rddInfoMap = mutable.Map[Int, RDDInfo]()
def storageStatusList = storageStatusListener.storageStatusList
/** Filter RDD info to include only those with cached partitions */
def rddInfoList = _rddInfoMap.values.filter(_.numCachedPartitions > 0).toSeq
/** Update each RDD's info to reflect any updates to the RDD's storage status */
private def updateRDDInfo() {
val rddInfos = _rddInfoMap.values.toSeq
val updatedRddInfos = StorageUtils.rddInfoFromStorageStatus(storageStatusList, rddInfos)
updatedRddInfos.foreach { info => _rddInfoMap(info.id) = info }
}
/**
* Assumes the storage status list is fully up-to-date. This implies the corresponding
* StorageStatusSparkListener must process the SparkListenerTaskEnd event before this listener.
*/
override def onTaskEnd(taskEnd: SparkListenerTaskEnd) = synchronized {
val metrics = taskEnd.taskMetrics
if (metrics != null && metrics.updatedBlocks.isDefined) {
updateRDDInfo()
}
}
override def onStageSubmitted(stageSubmitted: SparkListenerStageSubmitted) = synchronized {
val rddInfo = stageSubmitted.stageInfo.rddInfo
_rddInfoMap(rddInfo.id) = rddInfo
}
override def onStageCompleted(stageCompleted: SparkListenerStageCompleted) = synchronized {
// Remove all partitions that are no longer cached
_rddInfoMap.retain { case (_, info) => info.numCachedPartitions > 0 }
}
override def onUnpersistRDD(unpersistRDD: SparkListenerUnpersistRDD) = synchronized {
updateRDDInfo()
}
}
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