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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.scheduler
import java.util.Properties
import org.apache.spark.scheduler.cluster.TaskInfo
import scala.collection.mutable.Map
import org.apache.spark._
import org.apache.spark.executor.TaskMetrics
/**
* Types of events that can be handled by the DAGScheduler. The DAGScheduler uses an event queue
* architecture where any thread can post an event (e.g. a task finishing or a new job being
* submitted) but there is a single "logic" thread that reads these events and takes decisions.
* This greatly simplifies synchronization.
*/
private[spark] sealed trait DAGSchedulerEvent
private[spark] case class JobSubmitted(
finalRDD: RDD[_],
func: (TaskContext, Iterator[_]) => _,
partitions: Array[Int],
allowLocal: Boolean,
callSite: String,
listener: JobListener,
properties: Properties = null)
extends DAGSchedulerEvent
private[spark] case class BeginEvent(task: Task[_], taskInfo: TaskInfo) extends DAGSchedulerEvent
private[spark] case class CompletionEvent(
task: Task[_],
reason: TaskEndReason,
result: Any,
accumUpdates: Map[Long, Any],
taskInfo: TaskInfo,
taskMetrics: TaskMetrics)
extends DAGSchedulerEvent
private[spark] case class ExecutorGained(execId: String, host: String) extends DAGSchedulerEvent
private[spark] case class ExecutorLost(execId: String) extends DAGSchedulerEvent
private[spark] case class TaskSetFailed(taskSet: TaskSet, reason: String) extends DAGSchedulerEvent
private[spark] case object StopDAGScheduler extends DAGSchedulerEvent
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