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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.sql
import com.esotericsoftware.kryo.{Kryo, Serializer}
import com.esotericsoftware.kryo.io.{Input, Output}
import org.apache.spark.SparkConf
import org.apache.spark.serializer.KryoRegistrator
import org.apache.spark.sql.test.SharedSQLContext
/**
* Test suite to test Kryo custom registrators.
*/
class DatasetSerializerRegistratorSuite extends QueryTest with SharedSQLContext {
import testImplicits._
override protected def sparkConf: SparkConf = {
// Make sure we use the KryoRegistrator
super.sparkConf.set("spark.kryo.registrator", TestRegistrator().getClass.getCanonicalName)
}
test("Kryo registrator") {
implicit val kryoEncoder = Encoders.kryo[KryoData]
val ds = Seq(KryoData(1), KryoData(2)).toDS()
assert(ds.collect().toSet == Set(KryoData(0), KryoData(0)))
}
}
/** Used to test user provided registrator. */
class TestRegistrator extends KryoRegistrator {
override def registerClasses(kryo: Kryo): Unit =
kryo.register(classOf[KryoData], new ZeroKryoDataSerializer())
}
object TestRegistrator {
def apply(): TestRegistrator = new TestRegistrator()
}
/**
* A `Serializer` that takes a [[KryoData]] and serializes it as KryoData(0).
*/
class ZeroKryoDataSerializer extends Serializer[KryoData] {
override def write(kryo: Kryo, output: Output, t: KryoData): Unit = {
output.writeInt(0)
}
override def read(kryo: Kryo, input: Input, aClass: Class[KryoData]): KryoData = {
KryoData(input.readInt())
}
}
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