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SCollectionSyntax.scala
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SCollectionSyntax.scala
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/*
* Copyright 2022 Spotify AB
*
* Licensed 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 com.spotify.scio.parquet.tensorflow.dynamic.syntax
import com.spotify.scio.io.dynamic.syntax.DynamicSCollectionOps.writeDynamic
import com.spotify.scio.io.{ClosedTap, EmptyTap}
import com.spotify.scio.parquet.ParquetConfiguration
import com.spotify.scio.parquet.tensorflow.ParquetExampleIO
import com.spotify.scio.parquet.tensorflow.dynamic.ParquetExampleSink
import com.spotify.scio.values.SCollection
import org.apache.beam.sdk.io.hadoop.SerializableConfiguration
import org.apache.hadoop.conf.Configuration
import org.apache.parquet.hadoop.metadata.CompressionCodecName
import org.tensorflow.proto.example.Example
import org.tensorflow.metadata.v0.Schema
final class DynamicParquetExampleSCollectionOps(
private val self: SCollection[Example]
) extends AnyVal {
/**
* Save this SCollection of [[Example]] records as a Parquet files written to dynamic
* destinations.
*/
def saveAsDynamicParquetExampleFile(
path: String,
schema: Schema,
numShards: Int = ParquetExampleIO.WriteParam.DefaultNumShards,
suffix: String = ParquetExampleIO.WriteParam.DefaultSuffix,
compression: CompressionCodecName = ParquetExampleIO.WriteParam.DefaultCompression,
conf: Configuration = ParquetExampleIO.WriteParam.DefaultConfiguration,
tempDirectory: String = ParquetExampleIO.WriteParam.DefaultTempDirectory,
prefix: String = ParquetExampleIO.WriteParam.DefaultPrefix
)(
destinationFn: Example => String
): ClosedTap[Nothing] = {
if (self.context.isTest) {
throw new NotImplementedError(
"Parquet example file with dynamic destinations cannot be used in a test context"
)
} else {
val sink = new ParquetExampleSink(
schema,
compression,
new SerializableConfiguration(ParquetConfiguration.ofNullable(conf))
)
val write = writeDynamic(
path = path,
destinationFn = destinationFn,
numShards = numShards,
prefix = prefix,
suffix = suffix,
tempDirectory = tempDirectory
).via(sink)
self.applyInternal(write)
}
ClosedTap[Nothing](EmptyTap)
}
}
trait SCollectionSyntax {
implicit def dynamicParquetExampleSCollectionOps(
sc: SCollection[Example]
): DynamicParquetExampleSCollectionOps =
new DynamicParquetExampleSCollectionOps(sc)
}