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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