Github user pwendell commented on a diff in the pull request: https://github.com/apache/spark/pull/2342#discussion_r28729612 --- Diff: core/src/main/scala/org/apache/spark/ui/jobs/AllJobsPage.scala --- @@ -17,18 +17,137 @@ package org.apache.spark.ui.jobs -import scala.xml.{Node, NodeSeq} +import scala.xml.{Node, NodeSeq, Unparsed} +import java.util.Date import javax.servlet.http.HttpServletRequest -import org.apache.spark.ui.{WebUIPage, UIUtils} +import org.apache.spark.ui.{UIUtils, WebUIPage} import org.apache.spark.ui.jobs.UIData.JobUIData +import org.apache.spark.JobExecutionStatus /** Page showing list of all ongoing and recently finished jobs */ private[ui] class AllJobsPage(parent: JobsTab) extends WebUIPage("") { private val startTime: Option[Long] = parent.sc.map(_.startTime) private val listener = parent.listener + private def applicationTimelineView(jobs: Seq[JobUIData], now: Long): Seq[Node] = { --- End diff -- Could you do a few things to make this cleaner and easier to follow? 1. Remove the `val listener` field of the `AllJobsPage` class, then instead just access `parent.listener` directly in the `render` function. 2. Refactor the timeline generation code to be more modular. I'd recommend the following functions: ``` # These can be constants at the top level val EXECUTORS_LEGEND val JOBS_LEGEND def makeJobEvent(job: JobUIData): Seq[Node] // TODO: Consider pushing this into JobProgressListener case class ExecutorDataUI(startTime: Long, status: String, finishTime: Option[Long], finishReason: Option[String]) def makeExecutorEvent(executor: ExecutorUIData): Seq[Node] def makeTimeline(jobs: Seq[JobUIData], executors: seq[ExecutorUIData]) ``` Then in the `render` function you can access the listener and create all the necessary inputs to those functions.
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