core/src/main/scala/spark/scheduler/cluster/TaskInfo.scala


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package spark.scheduler.cluster

/**
 * Information about a running task attempt inside a TaskSet.
 */
private[spark]
class TaskInfo(
    val taskId: Long,
    val index: Int,
    val launchTime: Long,
    val executorId: String,
    val host: String,
    val preferred: Boolean) {
  var finishTime: Long = 0
  var failed = false

  def markSuccessful(time: Long = System.currentTimeMillis) {
    finishTime = time
  }

  def markFailed(time: Long = System.currentTimeMillis) {
    finishTime = time
    failed = true
  }

  def finished: Boolean = finishTime != 0

  def successful: Boolean = finished && !failed

  def running: Boolean = !finished

  def duration: Long = {
    if (!finished) {
      throw new UnsupportedOperationException("duration() called on unfinished tasks")
    } else {
      finishTime - launchTime
    }
  }

  def timeRunning(currentTime: Long): Long = currentTime - launchTime
}