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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
import org.apache.spark.executor.TaskMetrics
import org.apache.spark.util.{TaskCompletionListener, TaskCompletionListenerException}
import scala.collection.mutable.ArrayBuffer
private[spark] class TaskContextImpl(val stageId: Int,
val partitionId: Int,
val attemptId: Long,
val runningLocally: Boolean = false,
val taskMetrics: TaskMetrics = TaskMetrics.empty)
extends TaskContext
with Logging {
// List of callback functions to execute when the task completes.
@transient private val onCompleteCallbacks = new ArrayBuffer[TaskCompletionListener]
// Whether the corresponding task has been killed.
@volatile private var interrupted: Boolean = false
// Whether the task has completed.
@volatile private var completed: Boolean = false
override def addTaskCompletionListener(listener: TaskCompletionListener): this.type = {
onCompleteCallbacks += listener
this
}
override def addTaskCompletionListener(f: TaskContext => Unit): this.type = {
onCompleteCallbacks += new TaskCompletionListener {
override def onTaskCompletion(context: TaskContext): Unit = f(context)
}
this
}
@deprecated("use addTaskCompletionListener", "1.1.0")
override def addOnCompleteCallback(f: () => Unit) {
onCompleteCallbacks += new TaskCompletionListener {
override def onTaskCompletion(context: TaskContext): Unit = f()
}
}
/** Marks the task as completed and triggers the listeners. */
private[spark] def markTaskCompleted(): Unit = {
completed = true
val errorMsgs = new ArrayBuffer[String](2)
// Process complete callbacks in the reverse order of registration
onCompleteCallbacks.reverse.foreach { listener =>
try {
listener.onTaskCompletion(this)
} catch {
case e: Throwable =>
errorMsgs += e.getMessage
logError("Error in TaskCompletionListener", e)
}
}
if (errorMsgs.nonEmpty) {
throw new TaskCompletionListenerException(errorMsgs)
}
}
/** Marks the task for interruption, i.e. cancellation. */
private[spark] def markInterrupted(): Unit = {
interrupted = true
}
override def isCompleted: Boolean = completed
override def isRunningLocally: Boolean = runningLocally
override def isInterrupted: Boolean = interrupted
}
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