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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 java.util.Properties
import scala.collection.mutable.ArrayBuffer
import org.apache.spark.executor.TaskMetrics
import org.apache.spark.internal.Logging
import org.apache.spark.memory.TaskMemoryManager
import org.apache.spark.metrics.MetricsSystem
import org.apache.spark.metrics.source.Source
import org.apache.spark.util._
private[spark] class TaskContextImpl(
val stageId: Int,
val partitionId: Int,
override val taskAttemptId: Long,
override val attemptNumber: Int,
override val taskMemoryManager: TaskMemoryManager,
localProperties: Properties,
@transient private val metricsSystem: MetricsSystem,
// The default value is only used in tests.
override 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]
/** List of callback functions to execute when the task fails. */
@transient private val onFailureCallbacks = new ArrayBuffer[TaskFailureListener]
// Whether the corresponding task has been killed.
@volatile private var interrupted: Boolean = false
// Whether the task has completed.
@volatile private var completed: Boolean = false
// Whether the task has failed.
@volatile private var failed: Boolean = false
override def addTaskCompletionListener(listener: TaskCompletionListener): this.type = {
onCompleteCallbacks += listener
this
}
override def addTaskFailureListener(listener: TaskFailureListener): this.type = {
onFailureCallbacks += listener
this
}
/** Marks the task as failed and triggers the failure listeners. */
private[spark] def markTaskFailed(error: Throwable): Unit = {
// failure callbacks should only be called once
if (failed) return
failed = true
val errorMsgs = new ArrayBuffer[String](2)
// Process failure callbacks in the reverse order of registration
onFailureCallbacks.reverse.foreach { listener =>
try {
listener.onTaskFailure(this, error)
} catch {
case e: Throwable =>
errorMsgs += e.getMessage
logError("Error in TaskFailureListener", e)
}
}
if (errorMsgs.nonEmpty) {
throw new TaskCompletionListenerException(errorMsgs, Option(error))
}
}
/** Marks the task as completed and triggers the completion 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 = false
override def isInterrupted(): Boolean = interrupted
override def getLocalProperty(key: String): String = localProperties.getProperty(key)
override def getMetricsSources(sourceName: String): Seq[Source] =
metricsSystem.getSourcesByName(sourceName)
private[spark] override def registerAccumulator(a: AccumulatorV2[_, _]): Unit = {
taskMetrics.registerAccumulator(a)
}
}
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