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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.executor
import org.apache.spark.{Accumulator, InternalAccumulator}
import org.apache.spark.annotation.DeveloperApi
/**
* :: DeveloperApi ::
* Method by which output data was written.
* Operations are not thread-safe.
*/
@DeveloperApi
object DataWriteMethod extends Enumeration with Serializable {
type DataWriteMethod = Value
val Hadoop = Value
}
/**
* :: DeveloperApi ::
* A collection of accumulators that represents metrics about writing data to external systems.
*/
@DeveloperApi
class OutputMetrics private (
_bytesWritten: Accumulator[Long],
_recordsWritten: Accumulator[Long],
_writeMethod: Accumulator[String])
extends Serializable {
private[executor] def this(accumMap: Map[String, Accumulator[_]]) {
this(
TaskMetrics.getAccum[Long](accumMap, InternalAccumulator.output.BYTES_WRITTEN),
TaskMetrics.getAccum[Long](accumMap, InternalAccumulator.output.RECORDS_WRITTEN),
TaskMetrics.getAccum[String](accumMap, InternalAccumulator.output.WRITE_METHOD))
}
/**
* Create a new [[OutputMetrics]] that is not associated with any particular task.
*
* This is only used for preserving matching behavior on [[OutputMetrics]], which used to be
* a case class before Spark 2.0. Once we remove support for matching on [[OutputMetrics]]
* we can remove this constructor as well.
*/
private[executor] def this() {
this(InternalAccumulator.createOutputAccums()
.map { a => (a.name.get, a) }.toMap[String, Accumulator[_]])
}
/**
* Total number of bytes written.
*/
def bytesWritten: Long = _bytesWritten.localValue
/**
* Total number of records written.
*/
def recordsWritten: Long = _recordsWritten.localValue
/**
* The source to which this task writes its output.
*/
def writeMethod: DataWriteMethod.Value = DataWriteMethod.withName(_writeMethod.localValue)
private[spark] def setBytesWritten(v: Long): Unit = _bytesWritten.setValue(v)
private[spark] def setRecordsWritten(v: Long): Unit = _recordsWritten.setValue(v)
private[spark] def setWriteMethod(v: DataWriteMethod.Value): Unit =
_writeMethod.setValue(v.toString)
}
/**
* Deprecated methods to preserve case class matching behavior before Spark 2.0.
*/
object OutputMetrics {
@deprecated("matching on OutputMetrics will not be supported in the future", "2.0.0")
def apply(writeMethod: DataWriteMethod.Value): OutputMetrics = {
val om = new OutputMetrics
om.setWriteMethod(writeMethod)
om
}
@deprecated("matching on OutputMetrics will not be supported in the future", "2.0.0")
def unapply(output: OutputMetrics): Option[DataWriteMethod.Value] = {
Some(output.writeMethod)
}
}
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